Sample records for yacoraite formation northwestern

  1. GUIDELINES Formation of Northwestern University Faculty-Initiated Startup Companies Northwestern Investigator's

    E-print Network

    May, 2014 GUIDELINES ­ Formation of Northwestern University Faculty-Initiated Startup Companies Northwestern Investigator's Guidelines: Formation of Faculty-Initiated Startup Companies #12;May, 2014 GUIDELINES ­ Formation of Northwestern University Faculty-Initiated Startup Companies GUIDELINES ­ Formation

  2. Geochemistry and structure of the Hawley Formation: Northwestern Massachusetts

    SciTech Connect

    Kim, J.; Jacobi, R. (State Univ. of New York, Buffalo, NY (United States). Dept. of Geology)

    1993-03-01

    The Hawley Formation in northwestern Massachusetts is composed of mafic and felsic, (trondhjemitic) igneous units and black sulfidic schists and quartzites. The dominant lithology is a thinly foliated hbd-plag.-chi-qtz.-Fe carbonate schist with or without hornblende fasicules. Locally, this schist has alternating folia of chl/hbd and plag. and probably has a volcaniclastic protolith. Distinct pillows and tuffs are observed locally. In general, these schists have flat REE patterns at 10X chondrite and plot as IABs on discrimination diagrams. In the eastern part of the Hawley, some amphibolites show concave upward REE patterns, plot in the IAT or boninite field on discrimination diagrams, and appear to have boninitic affinities. The felsic lithologies are trondhjemitic and are intrusive into the IAT/boninite amphibolites. The intrusive nature is based on the presence of mafic xenoliths and intruded rafts of country rock in the trondhjemite as well as the occurrence of thin tabular trondhjemite bodies in sharp contact with the surrounding amphibolite. The trondhjemite varies from coarse-grained weakly foliated qtz-plag.-biotite gneiss with probable relict igneous zoned plagioclases to finer-grained well foliated qtz-plag.-garnet-hbd gneiss. REE patterns for the trondhjemites are weakly U-shaped with moderate to pronounced negative Eu anomalies. The trondhjemites, surrounding amphibolites, and black sulfidic schists and quartzites of the eastern part of the Hawley are intruded by massive, granular, medium grained, plagioclase phenocryst amphibolites with chilled margins. These intrusive sills predate or are coeval with the dominant foliation in the Hawley. Both sills and country rock contain a contact-parallel foliation as well as a later foliation at a low angle to the earlier foliation. The sill amphibolites are high TiO2 high Zr varieties that plot as MORBs to WPBs on discrimination diagrams and exhibit slightly LREE enriched MORB-like to T-MORB REE patterns.

  3. A team of researchers is modeling ozone formation induced by volatile organic NORTHWESTERN CHEMICAL AND BIOLOGICAL ENGINEERING

    E-print Network

    Ottino, Julio M.

    mechanistic models based on kinetics and photochemistry, from which predictions of ozone production canA team of researchers is modeling ozone formation induced by volatile organic compounds. NORTHWESTERN CHEMICAL AND BIOLOGICAL ENGINEERING MECHANISTIC MODEL OF OZONE FORMATION Principal Investigator

  4. Sedimentology and depositional environments of Lower Permian Yeso Formation in northwestern New Mexico

    Microsoft Academic Search

    John D. Stanesco

    1989-01-01

    The northwesternmost exposures of the Lower Permian (Leonardian) Yeso Formation are in uplifts that bound the southern half of the San Juan basin in northwestern New Mexico. The Yeso comprises the Meseta Blanca member and overlying San Ysidro Member. The latter is called the Los Vallos Member in the southern part of the study area. The Meseta Blanca consists of

  5. Simplified stratigraphic cross sections of the Eocene Green River Formation in the Piceance Basin, northwestern Colorado

    USGS Publications Warehouse

    Dietrich, John D.; Johnson, Ronald C.

    2013-01-01

    Thirteen stratigraphic cross sections of the Eocene Green River Formation in the Piceance Basin of northwestern Colorado are presented in this report. Originally published in a much larger and more detailed form by Self and others (2010), they are shown here in simplified, page-size versions that are easily accessed and used for presentation purposes. Modifications to the original versions include the elimination of the detailed lithologic columns and oil-yield histograms from Fischer assay data and the addition of ground-surface lines to give the depth of the various oil shale units shown on the cross section.

  6. Sedimentology and petroleum occurrence, Schoolhouse Member, Maroon Formation (Lower Permian), northwestern Colorado

    USGS Publications Warehouse

    Johnson, S.Y.; Schenk, C.J.; Anders, D.L.; Tuttle, M.L.

    1990-01-01

    The Lower Permian Schoolhouse Member of the Maroon Formation forms a partly exhumed petroleum reservoir in the Eagle basin of northwestern Colorado. The Schoolhouse consists mainly of yellowish gray to gray, low-angle to parallel bedded, very fine to fine-grained sandstone of eolian sand-sheet origin; interbedded fluvial deposits are present in most sections. Geological and geochemical data suggest that Schoolhouse Member oils have upper Paleozoic sources, including the intrabasinal Belden Formation. Late Paleozoic faults have served as local conduits for vertical petroleum migration. Large-scale (>200 km) lateral migration from sources in the Permian Phosphoria Formation is also possible but less likely. Belden oil was generated and migrated before about 75 Ma. Subsequently, the Schoolhouse Member reservoir was uplifted, then partly exhumed on the monoclinal flank of the Laramide (latest Cretaceous-Paleogene) White River uplift. -from Authors

  7. Sedimentology and petroleum occurrence, Schoolhouse Member, Maroon Formation (Lower Permian), northwestern Colorado

    SciTech Connect

    Johnson, S.Y.; Schenk, C.J.; Anders, D.L.; Tuttle, M.L. (Geological Survey, Denver, CO (USA))

    1990-02-01

    The Lower Permian Schoolhouse Member of the Maroon Formation (formerly considered the Schoolhouse Tongue of the Weber Sandstone) forms a partly exhumed petroleum reservoir in the Eagle basin of northwestern Colorado. The Schoolhouse consists mainly of yellowish gray to gray, low-angle to parallel bedded, very fine to fine-grained sandstone of eolian sand-sheet origin; interbedded fluvial deposits are present in most sections. The sand-sheet deposits of the Schoolhouse Member are sedimentologically and petrologically similar to those in the underlying red beds of the main body of the Maroon Formation, and the Schoolhouse is considered the uppermost sand sheet in the Maroon depositional sequence. The bleached and oil-stained Schoolhouse member is distinguished from the underlying Maroon red beds on the basis of its diagenetic history, which is related to regional hydrocarbon migration and development of secondary porosity. Geological and geochemical data suggest that Schoolhouse Member oils have upper Paleozoic sources, including the intrabasinal Belden Formation. 13 figs., 1 tab.

  8. The origin and formation model of Permian dolostones on the northwestern margin of Junggar Basin, China

    NASA Astrophysics Data System (ADS)

    Lu, Xinchuan; Shi, Ji'an; Zhang, Shuncun; Zou, Niuniu; Sun, Guoqiang; Zhang, Shengyin

    2015-06-01

    This study investigates the mechanism of dolostone formation and establishes a dolomitization model in the Permian strata on the northwestern margin of Junggar Basin, China. Dolomitic rock samples are collected from the Permian Fengcheng Formation in Urho area and then characterized by petrological, mineralogical, carbon and oxygen isotope, and trace element geochemical analyses. Results show that the major types of dolomitic rocks include dolomitic mudstone, dolomitic siltstone, dolomitized tuffaceous siltstone, and dolomitized tuffaceous mudstone. The dolomitized rocks are dominated by euhedral or subhedral powder- and fine-crystal dolomites formed by replacement lacustrine argilla-calcareous and siliceous (tuffaceous) components and commonly filled with residual and late calcite cements. The parameters of dolomitic rocks show great variations, including the V/Ni ratio (1.02-4.88), Sr content (95.9-783.6 ?g/g), Mg/Ca ratio (0.68-5.13), degree of ordering (0.39-1.00), ?18OPDB (-14.8‰ to 3.2‰), and ?13CPDB (-1‰ to 5.2‰). The dolomitic rocks have multi-stage origins and were formed in a semi-closed continental brackish-saltwater bay with weak hydrodynamic processes, deep water bodies, and relatively quiet conditions. In the Permian depositional stage, a combination of complex tectonic activities, fault development, hot subtropical climate, and frequent volcanic activities provided not only Mg2+ source for dolomitization but also channels for rapid flow and seepage of Mg-rich fluids. The origins of dolostones in the study area include penecontemporaneous dolomitization, burial dolomitization, and hydrothermal dolomitization. This study lays a foundation for further studies on dolomite formation and dolomite reservoir, and provides effective methods for researching complex dolostone (tuffaceous, shale and silty dolomite) formation.

  9. An uncertainty framework to estimate dense water formation rates : case study in the Northwestern Mediterranean.

    NASA Astrophysics Data System (ADS)

    Waldman, Robin; Somot, Samuel; Herrmann, Marine; Sevault, Florence; Estournel, Claude; Testor, Pierre

    2015-04-01

    The Northwestern Mediterranean (NWMed) sea is a key region for the Mediterranean thermohaline circulation as it includes the main deep water formation sites of the Western Mediterranean. The Mediterranean Ocean Observing System for the Environment (MOOSE) has been implemented since 2007 over that region to characterize the space and time variability of the main water masses up to interannual (yearly summer cruises) scale. However, despite a large covering of the NWMed region, the limited number of conductivity, temperature and depth (CTD) casts leads to subsampling errors and advocates for an uncertainty assessment of large-scale hydrology estimates. This study aims at estimating the error related to subsampling in time and space. For that purpose, an Observing System Simulation Experiment (OSSE) is performed with an eddy-permitting Mediterranean sea model (NEMOMED12) and an eddy-resolving NWMed sea model (SYMPHONIE). A subsampling of the full model fields in time and space allows for an error estimate in terms of large-scale hydrology. The methodology is applied to dense water volume estimates for the period july 2012 - july 2013. Secondly, an optimization framework is proposed to evaluate and improve MOOSE network's performances under a series of scientific constraints. The results will be discussed for an application in MOOSE observing network, as well as the main assumptions, the stakes and limitations of this framework.

  10. THE INSTITUTES AT NORTHWESTERN MEDICINE AT NORTHWESTERN

    E-print Network

    Contractor, Anis

    THE INSTITUTES AT NORTHWESTERN MEDICINE INNOVATION ENGINES AT NORTHWESTERN MEDICINE NORTHWESTERN INTEGRATIVE MEDICINE #12;THE INSTITUTES AT NORTHWESTERN MEDICINE INNOVATION ENGINES AT NORTHWESTERN MEDICINE NORTHWESTERN INTEGRATIVE MEDICINE "At Northwestern Integrative Medicine we believe in healthcare that addresses

  11. Shelf-facies microbiotas from the Odjick and Rocknest Formations (Epworth Group; 1. 89 Ga), northwestern Canada

    SciTech Connect

    Hofmann, H.J.; Grotzinger, J.P.

    1985-01-01

    Moderately well preserved microfossils are reported from two formations of the Epworth Group, Wopmay Orogen, northwestern Canada. An assemblage in an open marine, hematitic stromatolitic unit in the uppermost part of the Odjick Formation contains Huroniospora spp., Gunflintia sp., and Frutexites sp. This assemblage, which is remarkable for its preservation in a carbonate matrix, is similar to one found in a stromatolitic chert facies in the approximately coeval Gunflint Iron Formation of Ontario. Taxa in four members of the overlying Rocknest Formation occur in cherty dolostones of inner-shelf shallowing-upward cycles capped by small digitate stromatolites. These assemblages are environmentally restricted and comprise the spheroidal taxa Huroniospora spp., Melasmatosphaera magna, Sphaerophycus sp., and Palaeoanacystis sp., the filamentous taxa Archaeotrichion sp., Eomycetopsis sp, Siphonophycus sp., Brevitrichoides sp., Biocatenoides incrustata, Gunflintia. sp., and Archaeonema sp., the spinose acritarch Eomicrhystridium sp., and rare specimens of 2 unidentified and problematic forms. These assemblages represent the northwestern most occurrences of Aphebian (early Proterozoic) microfossils now known in North America. The presence of Frutexites in a hematitic unit of the Odjick Formation conforms to previous reports of this taxon from iron-rich sedimentary rocks, ranging in age from Proterozoic to Mesozoic; one occurrence from the Upper Devonian in Australia reportedly has an iridium anomaly associated with it.

  12. Nahcolite Resources in the Green River Formation, Piceance Basin, Northwestern Colorado

    USGS Publications Warehouse

    Brownfield, Michael E.; Johnson, Ronald C.; Self, Jesse G.; Mercier, Tracey J.

    2009-01-01

    The U.S. Geological Survey (USGS) recently completed an assessment of in-place nahcolite (NaHCO3) resources in the Piceance Basin, northwestern Colorado. Nahcolite is present in the oil shale deposits of the Parachute Creek Member of the Eocene Green River Formation. It occurs as disseminated aggregates, nodules, bedded units of disseminated brown crystals, and white crystalline beds associated with dawsonite (NaAl(OH)2CO3) and halite (NaCl). The nahcolite-bearing facies are divided into an unleached part containing the nahcolite and halite, which is estimated to be as much as 1,130 ft thick, and an upper leached part several hundred feet thick containing minor nahcolite aggregates and nodules. Locally, thick beds of halite and brown fine-grained nahcolite lie in the depocenter of the basin, but thin laterally away from the basin center and grade into beds of white, coarse-grained nahcolite. In the central part of the study area, the top of the nahcolite-bearing rocks range in depth from about 1,300 to 2,000 ft. Dissolution of water-soluble minerals, mostly nahcolite and halite, in the upper part of the nahcolite-bearing facies has created a collapsed leached zone as much as 580 ft thick that consists of laterally continuous units of solution breccia and fractured oil shale containing solution cavities. The top of the leached zone is not yet defined in the basin, but it probably extends into the A groove in the upper part of the Parachute Creek Member.

  13. Sedimentology and depositional environments of Lower Permian Yeso Formation in northwestern New Mexico

    SciTech Connect

    Stanesco, J.D. (Geological Survey, Denver, CO (USA))

    1989-09-01

    The northwesternmost exposures of the Lower Permian (Leonardian) Yeso Formation are in uplifts that bound the southern half of the San Juan basin in northwestern New Mexico. The Yeso comprises the Meseta Blanca member and overlying San Ysidro Member. The latter is called the Los Vallos Member in the southern part of the study area. The Meseta Blanca consists of cross-stratified and horizontal to wavy-bedded sandstones of eolian-dune, sand-sheet, and sabkha origin. These facies also occur in the San Ysidro (Los Vallos), which additionally includes mud-draped, ripple-laminated sandstones of supratidal mud-flat origin, gypsiferous sandstones and siltstones of sabkha origin, and evaporite-carbonate rocks of intertidal to marine-shelf origin. Paleocurrent analysis indicates that eolian dunes in the Meseta Blanca migrated southward in the northern part of the study area. These dunes may have been extensions of the DeChelly Sandstone erg to the northwest. Dunes in the southern part of the study area shifted under variable north-south winds. This variability may reflect a seasonal onshore/offshore wind regime. Lateral facies changes in the San Ysidro (Los Vallos) indicate a juxtaposition of eolian-dune and sand-dominated sabkha environments in the northern part of the study area, with coastal-sabkha, tidal, and shelf environments in the southern part. Eolian dunes prograded southward over coastal sabkhas at least 12 times during deposition of the Yeso. A northward shift of all facies during middle San Ysidro deposition suggests a marine transgression from the south.

  14. THE INSTITUTES AT NORTHWESTERN MEDICINE AT NORTHWESTERN

    E-print Network

    Engman, David M.

    THE INSTITUTES AT NORTHWESTERN MEDICINE INNOVATION ENGINES AT NORTHWESTERN MEDICINE OSHER CENTER FOR INTEGRATIVE MEDICINE AT NORTHWESTERN UNIVERSITY #12;THE INSTITUTES AT NORTHWESTERN MEDICINE INNOVATION ENGINES AT NORTHWESTERN MEDICINE OSHER CENTER FOR INTEGRATIVE MEDICINE AT NORTHWESTERN UNIVERSITY "Atthe

  15. A calibrated composite section for the Late Jurassic Reuchenette Formation in northwestern Switzerland

    E-print Network

    Wetzel, Andreas

    Switzerland (?Oxfordian, Kimmeridgian sensu gallico, Ajoie-Region) MARKUS JANK1,ANDREAS WETZEL2 & CHRISTIAN A. MEYER3 Key words. Stratigraphy, biostratigraphy, Kimmeridgian, Jurassic, NW Switzerland, Banné Marls ABSTRACT A new stratigraphical frame for Kimmeridgian sediments of northwestern Switzerland has been

  16. Morphology and formation of spreading cracks on pillow lavas at Cape Grim, northwestern Tasmania, Australia

    NASA Astrophysics Data System (ADS)

    Goto, Yoshihiko; McPhie, Jocelyn

    2012-09-01

    Tertiary basaltic pillow lobes at Cape Grim, northwestern Tasmania, Australia display well-preserved spreading cracks in the glassy crust. The spreading cracks are lens-shaped or rectangular in plan view. In cross section, they consist of a graben-like depression with a broad floor bounded by steep scarps. The floor of spreading crack contains an axial crack and a number of ridges that are arranged symmetrically with respect to the axial crack. The ridges within spreading cracks are inferred to have formed by the regular, repeated production and splitting of new crust at the centre of the spreading crack. This new interpretation of ridges in spreading cracks differs from the previous interpretation in which they are regarded as elongate normal fault blocks. Our interpretation provides new insight into the propagation mechanisms of pillow lavas.

  17. Makah Formation; a deep-marginal-basin sequence of late Eocene and Oligocene age in the northwestern Olympic Peninsula, Washington

    USGS Publications Warehouse

    Snavely, Parke Detweiler; Niem, A.R.; MacLeod, N.S.; Pearl, J.E.; Rau, W.W.

    1980-01-01

    The Makah Formation of the Twin River Group crops out in a northwest-trending linear belt in the northwesternmost part of the Olympic Peninsula, Wash. This marine sequence consists of 2800 meters of predominantly thin-bedded siltstone and sandstone that encloses six distinctive newly named members--four thick-bedded amalgamated turbidite sandstone members, an olistostromal shallow-water marine sandstone and conglomerate member, and a thin-bedded water-laid tuff member. A local unconformity of submarine origin occurs within the lower part of the Makah Formation except in the central part of the study area, where it forms the contact between the older Hoko River Formation and the Makah. Foraminiferal faunas indicate that the Makah Formation ranges in age from late Eocene (late Narizian) to late Oligocene (Zemorrian) and was deposited in a predominantly lower to middle bathyal environment. The Makah Formation is part of a deep-marginalbasin facies that crops out in the western part of the Olympic Peninsula, in southwesternmost Washington and coastal embayments in northwestern Oregon, and along the central part of the coast of western Vancouver Island. On the basis of limited subsurface data from exploratory wells, correlative deep-marginal-basin deposits underlie the inner continental shelf of Oregon and the continental shelf (Tofino basin) along the southwestern side of Vancouver Island. Directional structures in the Makah Formation indicate that the predominantly lithic arkosic sandstone that forms the turbidite packets was derived from the northwest. A possible source of the clastic material is the dioritic, granitic, and volcanic terranes in the vicinity of the Hesquiat Peninsula and Barkley Sound on the west coast of Vancouver Island. Vertical and lateral variations of turbidite facies suggest that the four packets of sandstone were formed as depositional lobes on an outer submarine fan. The thin-bedded strata between the turbidite packets have characteristics of basin-plain and outer-fan fringe deposits.

  18. High resolution modelling of dense water formation in the Northwestern Mediterranean: benefits from an improved initial stratification in summer

    NASA Astrophysics Data System (ADS)

    Estournel, Claude; Testor, Pierre; Damien, Pierre; Mortier, Laurent; Marsaleix, Patrick; Lellouche, Jean-Michel; Ulses, Caroline; Kessouri, Faycal; Raimbault, Patrick; Coppola, Laurent

    2014-05-01

    The period that extends from summer 2012 to summer 2013 was the subject of several field campaigns in the northwestern Mediterranean that allowed to characterize the stratification on a seasonal scale in this region of deep water formation. This period is therefore ideal for testing hydrodynamic models and assessing the accuracy required on initial conditions and meteorological forcing. A 1 km resolution simulation of the vertical stratification evolution of the northwestern Mediterranean between summer 2012 and spring 2013 was conducted. The representation of winter convection was shown to be highly dependent on initial conditions in summer. A method was developed to correct the initial state of the model using the observations of the annual summer cruise of the MOOSE monitoring program and data from ARGO profilers. In addition, an adjustment of the wind helped to better approach winter observations, the criterion being the profile of residual buoyancy, simple index of the potential of the water column to convect more or less deeply and rapidly. The simulation obtained after correction of the initial conditions and wind forcing allowed to accurately represent the characteristics of the water masses formed during the convective period, the area concerned by convection and its timing. We will first present the methodology used to correct the initial state of the simulation, and then the validation of the simulation based on the observations from the DEWEX cruise (MERMEX program) and from profilers deployed in the frame of the HyMeX program. Then the volume of dense water formed and its characteristics will be quantified as well as their sensitivity to initial conditions.

  19. NEW MIDDLE CAMBRIAN MOLLUSCS FROM THE LÁNCARA FORMATION OF THE CANTABRIAN MOUNTAINS (NORTH-WESTERN SPAIN)

    Microsoft Academic Search

    Thomas WOTTE

    An abundant and highly diverse fauna is characteristic for the nodular limestones of the upper member of the Láncara Formation. It consists of echinoderms, trilobites, brachiopods, molluscs, sponge- and chancelloriid re- mains, and other small shelly fossils. Whereas the trilobites of the Láncara Formation are well investigated, in- formation on other faunal groups is clearly underrepresented. In this paper the

  20. Osteology of Pseudochampsa ischigualastensis gen. et comb. nov. (Archosauriformes: Proterochampsidae) from the Early Late Triassic Ischigualasto Formation of Northwestern Argentina

    PubMed Central

    Trotteyn, M. Jimena; Ezcurra, Martín D.

    2014-01-01

    Proterochampsids are crocodile-like, probably semi-aquatic, quadrupedal archosauriforms characterized by an elongated and dorsoventrally low skull. The group is endemic from the Middle-Late Triassic of South America. The most recently erected proterochampsid species is “Chanaresuchus ischigualastensis”, based on a single, fairly complete skeleton from the early Late Triassic Ischigualasto Formation of northwestern Argentina. We describe here in detail the non-braincase cranial and postcranial anatomy of this species and revisit its taxonomy and phylogenetic relationships. The phylogenetic analysis recovered ‘Chanaresuchus ischigualastensis’ as part of a trichotomy together with Gualosuchus reigi and Chanaresuchus bonapartei. Accordingly, “Chanaresuchus ischigualastensis” can be potentially more closely related to Gualosuchus reigi, or even Rhadinosuchus gracilis, than to Chanaresuchus bonapartei. In addition, after discussing previously claimed synapomorphies of Chanaresuchus, we could not find unambiguous support for the monophyly of the genus. As a result, we propose here the erection of the new genus Pseudochampsa for ‘Chanaresuchus ischigualastensis’, which results in the new combination Pseudochampsa ischigualastensis. The information provided here about the anatomy and taxonomy of Pseudochampsa ischiguaslastensis will be useful for future quantitative analyses focused on the biogeography and macroevolutionary history of proterochampsids. PMID:25426846

  1. Reservoir Properties of the Zonguldak Formation, Located in the Western Black Sea Region, Northwestern Turkey

    NASA Astrophysics Data System (ADS)

    Küçükku?, N.; Ayy?ld?z, T.

    2012-04-01

    The Zonguldak Formation (Westfalian-Stefanian), which is situated in the Western Black Sea basin, is considered to have hydrocarbon potential for coalbed methane (Yalcin and Inan 2001). Additionally, the shale levels of the delta environment of Alacaagzi Formation (Namurian), underline the Zonguldak Formation is considered to have a source rock potential (Derman and Iztan 1997; Sahinturk and Ozcelik 1983). The delta plain of the Zonguldak Formation consists of shales, coals and siliciclastic rocks which have deposited in the lake, marsh and river environment, having ranging from 1000 to 1400 m thickness. The coals and siliciclastics which belong to the formation have persistence in both onshore and offshore. Nevertheless, there have not been published data related to the reservoir rock potential of siliciclastic levels of the Zonguldak Formation which is recognized to have CBM potential. Three deep research wells (Gegendere-1, Amasra -1 and Cakraz-1) have been drilled by TPAO on research area of the Western Black Sea Region to determine the hydrocarbon potential of the Zonguldak Formation. The Yilanli, Alacaagzi, Zonguldak, Cakraz, and Yemislicay formations have been penetrated in the wells. Methane was detected during drilling; but there was no economic detection from DST. The lithology of the Zonguldak formation was characterized through the core and cutting samples taken from the three wells and also thin sections. The petrographic studies were conducted on 44 thin sections, taken from core and cutting samples, indicating that they are fine to medium grained, moderate sorted, litharenite, sublitarenite, feldspathic arenite, carbonaceous mudstone, and quartz arenite composition. Cement materials are mainly clay matrix, and slightly calcite and silica. The XRD and SEM analyze show that the clay types are kaolinite, illite, chlorite and smectite, and high API values from GR logs support that siliciclastics levels have high content clay matrix. Petrographic determinations show that porosity ratio is less than 1%. The core plug samples taken from the Amasra-1 were used to better understanding about the petrophysical properties. Porosity and permeability values are 1,7-2,4% and 0.01-0.03 md, respectively. The petrographic, petropysical, minerological and reservoir rocks analyses on the siliciclastic levels of the Zonguldak Formation indicate that the formation has a poor reservoir potential in the studied wells.

  2. A New Basal Sauropodomorph (Dinosauria: Saurischia) from Quebrada del Barro Formation (Marayes-El Carrizal Basin), Northwestern Argentina

    PubMed Central

    Apaldetti, Cecilia; Martinez, Ricardo N.; Alcober, Oscar A.; Pol, Diego

    2011-01-01

    Background Argentinean basal sauropodomorphs are known by several specimens from different basins; Ischigualasto, El Tranquilo, and Mogna. The Argentinean record is diverse and includes some of the most primitive known sauropodomorphs such as Panphagia and Chromogisaurus, as well as more derived forms, including several massospondylids. Until now, the Massospondylidae were the group of basal sauropodomorphs most widely spread around Pangea with a record in almost all continents, mostly from the southern hemisphere, including the only record from Antarctica. Methodology/Principal Finding We describe here a new basal sauropodomorph, Leyesaurus marayensis gen. et sp. nov., from the Quebrada del Barro Formation, an Upper Triassic-Lower Jurassic unit that crops out in northwestern Argentina. The new taxon is represented by a partial articulated skeleton that includes the skull, vertebral column, scapular and pelvic girdles, and hindlimb. Leyesaurus is diagnosed by a set of unique features, such as a sharply acute angle (50 degrees) formed by the ascending process of the maxilla and the alveolar margin, a straight ascending process of the maxilla with a longitudinal ridge on its lateral surface, noticeably bulging labial side of the maxillary teeth, greatly elongated cervical vertebrae, and proximal articular surface of metatarsal III that is shelf-like and medially deflected. Phylogenetic analysis recovers Leyesaurus as a basal sauropodomorph, sister taxon of Adeopapposaurus within the Massospondylidae. Moreover, the results suggest that massospondylids achieved a higher diversity than previously thought. Conclusions/Significance Our phylogenetic results differ with respect to previous analyses by rejecting the massospondylid affinities of some taxa from the northern hemisphere (e.g., Seitaad, Sarahsaurus). As a result, the new taxon Leyesaurus, coupled with other recent discoveries, suggests that the diversity of massospondylids in the southern hemisphere was higher than in other regions of Pangea. Finally, the close affinities of Leyesaurus with the Lower Jurassic Massospondylus suggest a younger age for the Quebrada del Barro Formation than previously postulated. PMID:22096511

  3. Probable Ankylosaur Ossicles from the Middle Cenomanian Dunvegan Formation of Northwestern Alberta, Canada

    PubMed Central

    Burns, Michael E.; Vavrek, Matthew J.

    2014-01-01

    A sample of six probable fragmentary ankylosaur ossicles, collected from Cenomanian deposits of the Dunvegan Formation along the Peace River, represent one of the first dinosaurian skeletal fossils reported from pre-Santonian deposits in Alberta. Specimens were identified as ankylosaur by means of a palaeohistological analysis. The primary tissue is composed of zonal interwoven structural fibre bundles with irregularly-shaped lacunae, unlike the elongate lacunae of the secondary lamellar bone. The locality represents the most northerly Cenomanian occurrence of ankylosaur skeletal remains. Further fieldwork in under-examined areas of the province carries potential for additional finds. PMID:24816807

  4. Probable ankylosaur ossicles from the middle Cenomanian Dunvegan formation of northwestern Alberta, Canada.

    PubMed

    Burns, Michael E; Vavrek, Matthew J

    2014-01-01

    A sample of six probable fragmentary ankylosaur ossicles, collected from Cenomanian deposits of the Dunvegan Formation along the Peace River, represent one of the first dinosaurian skeletal fossils reported from pre-Santonian deposits in Alberta. Specimens were identified as ankylosaur by means of a palaeohistological analysis. The primary tissue is composed of zonal interwoven structural fibre bundles with irregularly-shaped lacunae, unlike the elongate lacunae of the secondary lamellar bone. The locality represents the most northerly Cenomanian occurrence of ankylosaur skeletal remains. Further fieldwork in under-examined areas of the province carries potential for additional finds. PMID:24816807

  5. INNOVATION ENGINES AT NORTHWESTERN

    E-print Network

    Engman, David M.

    INNOVATION ENGINES AT NORTHWESTERN MEDICINE DIVISION OF RHEUMATOLOGY THE INSTITUTES AT NORTHWESTERN, Division of Rheumatology, Northwestern University Feinberg of Medicine Building on advancements in the treatment of inflammatory arthritis, the Division of Rheumatology at Northwestern University Feinberg School

  6. Depositional environment of the Cambro-Ordovician Rose Run Formation in northeastern Ohio, and equivalent, Gatesburg Formation in northwestern Pennsylvania

    SciTech Connect

    Enterline, D.S.; Foos, A.M. (Univ. of Akron, OH (United States))

    1991-03-01

    An ideal sedimentary sequence from the Rose Run Formation consists of three facies in the following order: (1) algal laminated/stromatolite facies, (2) bioturbated dolomite facies, and (3) crossbedded sandstone facies. The algal laminated/stromatolite facies is composed of fine to very fine crystalline dolomite with laminations 2-4 cm thick. Also observed in this facies are mudcracks. The bioturbated dolomite facies is a fine to medium crystalline dolomite with an average of 10% clastic constituents such as quartz, orthoclase, microcline, and glauconite. Bioturbation in this facies ranges from slight to well with burrows 0.5-3 cm in diameter. Other structures observed include rip-up clasts, pelloids, and oncolites. The cross-bedded sandstone facies is characterized by low-angle crossbedded, fine- to coarse-grained sandstones. This sandstone has on the average 79% quartz, 12% orthoclase, 6% microcline, 1% detridal chert, and 1-2% glauconite. The heavy mineral fraction consists of tourmaline and zircon in {approximately}1% concentrations. The grains are subrounded to rounded with a size range of 0.15-0.30 mm. Sedimentary structures include rip-up clasts, current ripples, herringbone crossbedding, and herringbone imbricate rip-up clasts.

  7. The Kharapeh orogenic gold deposit: geological, structural, and geochemical controls on epizonal ore formation in West Azerbaijan Province, Northwestern Iran

    Microsoft Academic Search

    Shojaeddin Niroomand; Richard J. Goldfarb; Farid Moore; Mohammad Mohajjel; Erin E. Marsh

    2011-01-01

    The Kharapeh gold deposit is located along the northwestern margin of the Sanandaj–Sirjan Zone (SSZ) in the West Azerbaijan\\u000a province, Iran. It is an epizonal orogenic gold deposit formed within the deformed zone between central Iran and the Arabian\\u000a plate during the Cretaceous–Tertiary Zagros orogeny. The deposit area is underlain by Cretaceous schist and marble, as well\\u000a as altered andesite

  8. Lithofacies, age, depositional setting, and geochemistry of the Otuk Formation in the Red Dog District, northwestern Alaska

    USGS Publications Warehouse

    Dumoulin, Julie A.; Burruss, Robert A.; Blome, Charles D.

    2013-01-01

    Complete penetration of the Otuk Formation in a continuous drill core (diamond-drill hole, DDH 927) from the Red Dog District illuminates the facies, age, depositional environment, source rock potential, and isotope stratigraphy of this unit in northwestern Alaska. The section, in the Wolverine Creek plate of the Endicott Mountains Allochthon (EMA), is ~82 meters (m) thick and appears structurally uncomplicated. Bedding dips are generally low and thicknesses recorded are close to true thicknesses. Preliminary synthesis of sedimentologic, paleontologic, and isotopic data suggests that the Otuk succession in DDH 927 is a largely complete, albeit condensed, marine Triassic section in conformable contact with marine Permian and Jurassic strata. The Otuk Formation in DDH 927 gradationally overlies gray siliceous mudstone of the Siksikpuk Formation (Permian, based on regional correlations) and underlies black organic-rich mudstone of the Kingak(?) Shale (Jurassic?, based on regional correlations). The informal shale, chert, and limestone members of the Otuk are recognized in DDH 927, but the Jurassic Blankenship Member is absent. The lower (shale) member consists of 28 m of black to light gray, silty shale with as much as 6.9 weight percent total organic carbon (TOC). Thin limy layers near the base of this member contain bivalve fragments (Claraia sp.?) consistent with an Early Triassic (Griesbachian-early Smithian) age. Gray radiolarian chert dominates the middle member (25 m thick) and yields radiolarians of Middle Triassic (Anisian and Ladinian) and Late Triassic (Carnian-late middle Norian) ages. Black to light gray silty shale, like that in the lower member, forms interbeds that range from a few millimeters to 7 centimeters in thickness through much of the middle member. A distinctive, 2.4-m-thick interval of black shale and calcareous radiolarite ~17 m above the base of the member has as much as 9.8 weight percent TOC, and a 1.9-m-thick interval of limy to cherty mudstone immediately above this contains radiolarians, foraminifers, conodonts, and halobiid bivalve fragments. The upper (limestone) member (29 m thick) is lime mudstone with monotid bivalves and late Norian radiolarians, overlain by gray chert that contains Rhaetian (latest Triassic) radiolarians; Rhaetian strata have not previously been documented in the Otuk. Rare gray to black shale interbeds in the upper member have as much as 3.4 weight percent TOC. At least 35 m of black mudstone overlies the limestone member; these strata lack interbeds of oil shale and chert that are characteristic of the Blankenship, and instead they resemble the Kingak Shale. Vitrinite reflectance values (2.45 and 2.47 percent Ro) from two samples of black shale in the chert member indicate that these rocks reached a high level of thermal maturity within the dry gas window. Regional correlations indicate that lithofacies in the Otuk Formation vary with both structural and geographic position. For example, the shale member of the Otuk in the Wolverine Creek plate includes more limy layers and less barite (as blades, nodules, and lenses) than equivalent strata in the structurally higher Red Dog plate of the EMA, but it has fewer limy layers than the shale member in the EMA ~450 kilometers (km) to the east at Tiglukpuk Creek. The limestone member of the Otuk is thicker in the Wolverine Creek plate than in the Red Dog plate and differs from this member in EMA sections to the east in containing an upper cherty interval that lacks monotids; a similar interval is seen at the top of the Otuk Formation ~125 km to the west (Lisburne Peninsula). Our observations are consistent with the interpretations of previous researchers that Otuk facies become more distal in higher structural positions and that within a given structural level more distal facies occur to the west. Recent paleogeographic reconstructions indicate that the Otuk accumulated at a relatively high paleolatitude with a bivalve fauna typical of the Boreal realm. A suite of ?13Corg (carbon isotopic composition of carbon) data (n=38)

  9. Interannual variability (1979-2013) of the North-Western Mediterranean deep water mass formation: past observation reanalysis and coupled ocean-atmosphere high-resolution modelling

    NASA Astrophysics Data System (ADS)

    Somot, Samuel; Houpert, Loic; Sevault, Florence; Testor, Pierre; Bosse, Anthony; Durrieu de Madron, Xavier; Dubois, Clotilde; Herrmann, Marine; Waldman, Robin; Bouin, Marie-Noëlle; Cassou, Christophe

    2015-04-01

    The North-Western Mediterranean Sea is known as one of the only place in the world where open-sea deep convection occurs (often up to more than 2000m) with the formation of the Western Mediterranean Deep Water (WMDW). This phenomena is mostly driven by local preconditioning of the water column and strong buoyancy losses during Winter. At the event scale, the WMDW formation is characterized by different phases (preconditioning, strong mixing, restratification and spreading), intense air-sea interaction and strong meso-scale activity but, on a longer time scale, it also shows a large interannual variability and may be strongly affected by climate change with impact on the regional biogeochemistry. Therefore observing, simulating and understanding the long-term temporal variability of the North-Western Mediterranean deep water formation is still today a very challenging task. We try here to tackle those issues thanks to (1) a thorough reanalysis of past in-situ observations (CTD, Argo, surface and deep moorings, gliders) and (2) an ERA-Interim driven simulation using a recently-developed fully coupled Regional Climate System Model (CNRM-RCSM4, Sevault et al. 2014). The multi-decadal simulation (1979-2013) is designed to be temporally and spatially homogeneous with a realistic chronology, a high resolution representation of both the regional ocean and atmosphere, specific initial conditions, a long-term spin-up and a full ocean-atmosphere coupling without constraint at the air-sea interface. The observation reanalysis allows to reconstruct interannual time series of deep water formation indicators (ocean surface variables, mixed layer depth, surface of the convective area, dense water volumes and characteristics of the deep water). Using the observation-based indicators and the model outputs, the 34 Winters of the period 1979-2013 are analysed in terms of weather regimes, related Winter air-sea fluxes, ocean preconditioning, mixed layer depth, surface of the convective area, deep water formation rate and long-term evolution of the deep water hydrology.

  10. INSTITUTES AT NORTHWESTERN MEDICINE

    E-print Network

    Engman, David M.

    THE CANCER INSTITUTES AT NORTHWESTERN MEDICINE CANCER SURVIVORSHIP INSTITUTE THE INSTITUTES AT NORTHWESTERN MEDICINE #12;THE INSTITUTES AT NORTHWESTERN MEDICINE Today more than ever, cancer survivors Survivorship Institute at Northwestern Medicine is exceptionally well-positioned to integrate the best medical

  11. On the formation of barrier layers and associated vertical temperature inversions: A focus on the northwestern tropical Atlantic

    NASA Astrophysics Data System (ADS)

    Mignot, J.; Lazar, A.; Lacarra, M.

    2012-02-01

    A unique barrier layer (BL) system in terms of persistence, extension, and associated subsurface temperature maximum is present seasonally in the northwestern tropical Atlantic. Based on climatological output of a general circulation ocean model, we show here that its development consists of two phases. In summer, the BL is relatively shallow and thin but subsurface temperature maxima are intense. The latter develop as a result of the specific seasonality of the freshwater discharge in this area, which limits the mixed layer to a very thin depth while the intense radiative heat flux penetrates significantly below, thereby heating the subsurface waters protected from air-sea interactions and inducing a barrier layer between the mixed layer and the ocean interior. In winter, the BL development is due to a surface decrease in salinity associated with the surface freshwater capping, which decouples the pycnocline, and hence the winter mixed layer, from the thermocline. The mechanism is ubiquitous in the sense that it is very similar to that of other areas at the same latitude, as well as at high latitudes in regions of seasonal surface freshening. Results are discussed in the light of a simple linear equation linking the BL development to time evolution of Sea Surface Temperature and Sea Surface Salinity stratification.

  12. The Kharapeh orogenic gold deposit: geological, structural, and geochemical controls on epizonal ore formation in West Azerbaijan Province, Northwestern Iran

    NASA Astrophysics Data System (ADS)

    Niroomand, Shojaeddin; Goldfarb, Richard J.; Moore, Farid; Mohajjel, Mohammad; Marsh, Erin E.

    2011-04-01

    The Kharapeh gold deposit is located along the northwestern margin of the Sanandaj-Sirjan Zone (SSZ) in the West Azerbaijan province, Iran. It is an epizonal orogenic gold deposit formed within the deformed zone between central Iran and the Arabian plate during the Cretaceous-Tertiary Zagros orogeny. The deposit area is underlain by Cretaceous schist and marble, as well as altered andesite and dacite dikes. Structural analysis indicates that the rocks underwent tight to isoclinal recumbent folding and were subsequently co-axially refolded to upright open folds during a second deformation. Late- to post-tectonic Cenozoic granites and granodiorites occur northeast of the deposit area. Mineralization mainly is recognized within NW-trending extensional structures as veins and breccia zones. Normal faults, intermediate dikes, and quartz veins, oriented subparallel to the axial surface of the Kharapeh antiform, indicate synchronous extension perpendicular to the fold axis during the second folding event. The gold-bearing quartz veins are >1 km in length and average about 6 m in width; breccia zones are 10-50 m in length and ?1 m in width. Hydrothermal alteration mainly consists of silicification, sulfidation, chloritization, sericitization, and carbonatization. Paragenetic relationships indicate three distinct stages—replacement and silicification, brecciation and fracture filling, and cataclastic brecciation—with the latter two being gold-rich. Fluid inclusion data suggest mineral deposition at temperatures of at least 220-255°C and depths of at least 1.4-1.8 km, from a H2O-CO2±CH4 fluid of relatively high salinity (12-14 wt.% NaCl equiv.), which may reflect metamorphism of passive margin carbonate sequences. Ore fluid ?18O values between about 7‰ and 9‰ suggest no significant meteoric water input, despite gold deposition in a relatively shallow epizonal environment. Similarities to other deposits in the SSZ suggest that the deposit formed as part of a diachronous gold event during the middle to late Tertiary throughout the SSZ and during the final stages of the Zagros orogeny. The proximity of Kharapeh to the main tectonic suture of the orogen, well-developed regional fold systems with superimposed complex fracture geometries, and recognition of nearby volcanogenic massive sulfide systems that suggest a region characterized by sulfur- and metal-rich crustal rocks, collectively indicate an area of the SSZ with high favorability for undiscovered gold resources.

  13. The Kharapeh orogenic gold deposit: Geological, structural, and geochemical controls on epizonal ore formation in West Azerbaijan Province, Northwestern Iran

    USGS Publications Warehouse

    Niroomand, Shojaeddin; Goldfarb, Richard J.; Moore, Farib; Mohajjel, Mohammad; Marsh, Erin E.

    2011-01-01

    The Kharapeh gold deposit is located along the northwestern margin of the Sanandaj–Sirjan Zone (SSZ) in the West Azerbaijan province, Iran. It is an epizonal orogenic gold deposit formed within the deformed zone between central Iran and the Arabian plate during the Cretaceous–Tertiary Zagros orogeny. The deposit area is underlain by Cretaceous schist and marble, as well as altered andesite and dacite dikes. Structural analysis indicates that the rocks underwent tight to isoclinal recumbent folding and were subsequently co-axially refolded to upright open folds during a second deformation. Late- to post-tectonic Cenozoic granites and granodiorites occur northeast of the deposit area. Mineralization mainly is recognized within NW-trending extensional structures as veins and breccia zones. Normal faults, intermediate dikes, and quartz veins, oriented subparallel to the axial surface of the Kharapeh antiform, indicate synchronous extension perpendicular to the fold axis during the second folding event. The gold-bearing quartz veins are >1 km in length and average about 6 m in width; breccia zones are 10–50 m in length and ?1 m in width. Hydrothermal alteration mainly consists of silicification, sulfidation, chloritization, sericitization, and carbonatization. Paragenetic relationships indicate three distinct stages—replacement and silicification, brecciation and fracture filling, and cataclastic brecciation—with the latter two being gold-rich. Fluid inclusion data suggest mineral deposition at temperatures of at least 220–255°C and depths of at least 1.4–1.8 km, from a H2O–CO2±CH4 fluid of relatively high salinity (12–14 wt.% NaCl equiv.), which may reflect metamorphism of passive margin carbonate sequences. Ore fluid ?18O values between about 7? and 9? suggest no significant meteoric water input, despite gold deposition in a relatively shallow epizonal environment. Similarities to other deposits in the SSZ suggest that the deposit formed as part of a diachronous gold event during the middle to late Tertiary throughout the SSZ and during the final stages of the Zagros orogeny. The proximity of Kharapeh to the main tectonic suture of the orogen, well-developed regional fold systems with superimposed complex fracture geometries, and recognition of nearby volcanogenic massive sulfide systems that suggest a region characterized by sulfur- and metal-rich crustal rocks, collectively indicate an area of the SSZ with high favorability for undiscovered gold resources.

  14. Spatial and stratigraphic distribution of water in oil shale of the Green River Formation using Fischer assay, Piceance Basin, northwestern Colorado

    USGS Publications Warehouse

    Johnson, Ronald C.; Mercier, Tracey J.; Brownfield, Michael E.

    2014-01-01

    The spatial and stratigraphic distribution of water in oil shale of the Eocene Green River Formation in the Piceance Basin of northwestern Colorado was studied in detail using some 321,000 Fischer assay analyses in the U.S. Geological Survey oil-shale database. The oil-shale section was subdivided into 17 roughly time-stratigraphic intervals, and the distribution of water in each interval was assessed separately. This study was conducted in part to determine whether water produced during retorting of oil shale could provide a significant amount of the water needed for an oil-shale industry. Recent estimates of water requirements vary from 1 to 10 barrels of water per barrel of oil produced, depending on the type of retort process used. Sources of water in Green River oil shale include (1) free water within clay minerals; (2) water from the hydrated minerals nahcolite (NaHCO3), dawsonite (NaAl(OH)2CO3), and analcime (NaAlSi2O6.H20); and (3) minor water produced from the breakdown of organic matter in oil shale during retorting. The amounts represented by each of these sources vary both stratigraphically and areally within the basin. Clay is the most important source of water in the lower part of the oil-shale interval and in many basin-margin areas. Nahcolite and dawsonite are the dominant sources of water in the oil-shale and saline-mineral depocenter, and analcime is important in the upper part of the formation. Organic matter does not appear to be a major source of water. The ratio of water to oil generated with retorting is significantly less than 1:1 for most areas of the basin and for most stratigraphic intervals; thus water within oil shale can provide only a fraction of the water needed for an oil-shale industry.

  15. Spatial and stratigraphic distribution of water in oil shale of the Green River Formation using Fischer Assay, Piceance Basin, northwestern Colorado

    USGS Publications Warehouse

    Johnson, Ronald C.; Mercier, Tracey J.; Brownfield, Michael E.

    2014-01-01

    The spatial and stratigraphic distribution of water in oil shale of the Eocene Green River Formation in the Piceance Basin of northwestern Colorado was studied in detail using some 321,000 Fischer assay analyses in the U.S. Geological Survey oil-shale database. The oil-shale section was subdivided into 17 roughly time-stratigraphic intervals, and the distribution of water in each interval was assessed separately. This study was conducted in part to determine whether water produced during retorting of oil shale could provide a significant amount of the water needed for an oil-shale industry. Recent estimates of water requirements vary from 1 to 10 barrels of water per barrel of oil produced, depending on the type of retort process used. Sources of water in Green River oil shale include (1) free water within clay minerals; (2) water from the hydrated minerals nahcolite (NaHCO3), dawsonite (NaAl(OH)2CO3), and analcime (NaAlSi2O6.H20); and (3) minor water produced from the breakdown of organic matter in oil shale during retorting. The amounts represented by each of these sources vary both stratigraphically and areally within the basin. Clay is the most important source of water in the lower part of the oil-shale interval and in many basin-margin areas. Nahcolite and dawsonite are the dominant sources of water in the oil-shale and saline-mineral depocenter, and analcime is important in the upper part of the formation. Organic matter does not appear to be a major source of water. The ratio of water to oil generated with retorting is significantly less than 1:1 for most areas of the basin and for most stratigraphic intervals; thus water within oil shale can provide only a fraction of the water needed for an oil-shale industry.

  16. Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina

    NASA Astrophysics Data System (ADS)

    Papa, Cecilia del; Pasquo, Mercedes di

    2007-01-01

    The Tarija Formation of the Macharetí Group has been studied sedimentologically and palynologically at Zanja Honda Creek and the Zanja Honda x-1 well to assess the paleoenviromental and paleoclimatic evolution of the southern portion of the Tarija Basin. In addition, new palynological data and their implications are presented. The Tarija Formation consists mainly of thick diamictites interbedded with sandstone and mudstone layers; for the first time, a varves succession is described from the cores of the ZH x-1 well. Fifty-six spore species, 18 monosaccates, 1 praecolpate pollen grain, 4 paleophytoplankton species, and much phytodebris are recorded. The indigenous miospores are assigned to the middle portion of the Dictyotriletes bireticulatus-Cristatisporites chacoparanensis (BC) Biozone di Pasquo of early Late Carboniferous (Westphalian) age. Moreover, abundant reworked palynomorphs occur in both assemblages, recording erosion of Silurian-Early Carboniferous rocks. Some Late Carboniferous species such as Crassispora kosankei (Potonié and Kremp) Bhardwaj emend. Smith and Butterworth, Cristatisporites rollerii Ottone, and Cystoptychus azcuyi di Pasquo, exclusive of the KA Biozone, and Raistrickia radiosa Playford and Helby of the RS Biozone di Pasquo are interpreted as reworked from the lower Tupambi and Itacuamí formations. A fluviolacustrine setting is interpreted for the Tarija Formation on the basis of the presence of glacial varves, continental algae such as Botryococcus braunii Kützing, and overall facies associations. A hiatus between the fluviodeltaic interglacial Tupambi-Itacuamí depositional cycle ("Cycle I") and the fluviolacustrine, glacially influenced Itacuamí-Tarija depositional cycle ("Cycle II") is suggested by the sedimentary and palynologic data. This interpretation is confirmed by short-ranged species with biostratigraphic value, as well as the recognition of useful lithological and palynological differences helpful for characterizing both similar superposed sedimentary cycles.

  17. Hydrodynamic potential of upper cretaceous Mesaverde group and Dakota formation, San Juan Basin, northwestern New Mexico and southwestern Colorado 

    E-print Network

    Dougless, Thomas Clay

    1984-01-01

    and sandstone. The Fruitland Formation ranges in thickness from zero on the east side of the basin, owing to truncation prior to Paleocene deposition, to about 500 ft (152 m), but averages about 300 ft (91 m) (Fassett and Hinds, 1971). The Kirtland Shale...). The undivided Farmington Sandstone and upper shale member ranges in thickness from zero on the east to 1, 500 ft (457 m) in the northwest part of the basin. The total Kirtland Shale thine from northwest to southeast across the San Juan Basin owing...

  18. The oleaginous Botryococcus from the Triassic Yanchang Formation in Ordos Basin, Northwestern China: Morphology and its paleoenvironmental significance

    NASA Astrophysics Data System (ADS)

    Ji, Li-ming; Yan, Kui; Meng, Fan-wei; Zhao, Min

    2010-05-01

    High abundance but rather low diversity algal fossils were found in the hydrocarbon source rocks of the Ch 7-2-Ch 7-3 section, Triassic Yanchang Formation in the Xifeng area of southwest Ordos Basin, which are mainly composed of prolific Leiosphaeridia and Botryococcus. Botryococcus colonies are of various forms; the majority is nubbly, with some of cluster and cotton shape. The nubbly colonies appear globular, cordiform, ternate petal, obtuse triangle, chrysanthemum shape and so on. Most Botryococcus are saffron or brown and are frequently covered with clay under transmission microscope, and shows strong yellow and light brown under fluorescence microscope. Botryococcus could live in freshwater and brackish water. The Botryococcus colonies that lived in fresh water are small with small single cells arranged radially, with undulant or indented edges. The Botryococcus colonies that lived in brackish water are bigger, with larger single cells arranged irregularly, with slippery contours. The most of Botryococcus are discovered from the organic-rich argillaceous sediment with abundant pyrites in the semi- and deep-lake facies, and shows they were preserved in low-energy reducing environments. Taphonomic characteristics of various microfossils and the present of Pediastrum in the phytoplankton flora indicate that they are in situ or near burial. The lake area of the Ordos Basin was gradually expanding and reaching its most extensive flood surface in the Ch 7 of Yanchang Formation interval during the Middle and Late Triassic, with warm climate, plentiful rainfall, and luxuriant vegetation, as determined by the environmental analysis with Botryococcus in Xifeng area. The presence of two ecological types of Botryococcus indicates that the salinity of lake water was fluctuating in the Ch 7 interval. The occurrence of symbiotic acritarchs and geochemical salinity indices show that the Ordos Lake was a typical fresh-water lake, which was gradually desalted, and its salinity fluctuation was narrow during the Mid-Later Triassic. The ecological type of the palynological flora discovered from the Ch 7 to Ch 8 in Xifeng area is similar to that from the Fuxian Lake, with abundant Botryococcus in the Yungui Plateau of China. These findings imply that the Ordos Basin was in a lower-latitude area of temperate to subtropical climate during the Middle and Late Triassic.

  19. Sequence stratigraphy, sedimentary systems and petroleum plays in a low-accommodation basin: Middle to upper members of the Lower Jurassic Sangonghe Formation, Central Junggar Basin, Northwestern China

    NASA Astrophysics Data System (ADS)

    Feng, Youliang; Jiang, Shu; Wang, Chunfang

    2015-06-01

    The Lower Jurassic Junggar Basin is a low-accommodation basin in northwestern China. Because of low subsidence rates and a warm, wet climate, deposits of the Central subbasin of the Junggar Basin formed from fluvial, deltaic, shallow lake facies. Sequence stratigraphy and sedimentary systems of the Lower Jurassic members of the Sangonghe Formation (J1s) were evaluated by observing cores, interpreting wireline logs and examining seismic profiles. Two third-order sequences were recognized in the strata. The distribution of the sedimentary systems in the systems tracts shows that tectonic movement, paleorelief, paleoclimate and changes in lake level controlled the architecture of individual sequences. During the development of the lowstand systems tract (LST), the intense structural movement of the basin resulted in a significant fall in the water level in the lake, accompanied by rapid accommodation decrease. Braided rivers and their deltaic systems were also developed in the Central Junggar Basin. Sediments carried by braided rivers were deposited on upward slopes of the paleorelief, and braid-delta fronts were deposited on downward slopes. During the transgressive systems tract (TST), the tectonic movement of the basin was quiescent and the climate was warm and humid. Lake levels rose and accommodation increased quickly, shoal lines moved landward, and shore- to shallow-lake deposits, sublacustrine fans and deep-lake facies were deposited in shallow- to deep-lake environments. During the highstand systems tract (HST), the accommodation no longer increased but sediment supply continued, far exceeding accommodation. HST deposits slowly formed in shallow-lake to meandering river delta-front environments. Relatively low rates of structural subsidence and low accommodation resulted in coarse-grained successions that were fining upward. Deposits were controlled by structural movement and paleorelief within the LST to TST deposits in the Central subbasin. Fine- to medium-grained coarsening-upward successions developed during the HST. The sand bodies of braid-delta fronts on the downward slopes of the paleorelief in the LST and the sublacustrine fans in the TST became reservoirs for hydrocarbon accumulation. Petroleum plays have only been found in the Sangonghe Formation (J1s) located on structural ridges that consist of sand bodies comprising these sequences. Favorable conditions for petroleum plays in HST1-LST2 occur where the sand bodies have been fractured by faults and sealed by denudation and pinch-out lines, then overlain by deep lake mudstone in TST2. The favorable condition of the sand bodies within TST2 occurs where isolated sand bodies have been fractured by faults.

  20. NORTHWESTERN UNIVERSITY COMMENCEMENT SPEAKERS, 1892-2013 Northwestern University Archives www.library.northwestern.edu/archives/1

    E-print Network

    Shahriar, Selim

    NORTHWESTERN UNIVERSITY COMMENCEMENT SPEAKERS, 1892-2013 Northwestern University Archives www.library.northwestern.edu/archives SPEAKERS, 1892-2013 Northwestern University Archives www.library.northwestern.edu/archives/2 1917 William SPEAKERS, 1892-2013 Northwestern University Archives www.library.northwestern.edu/archives/3 1951 Louis S

  1. NORTHWESTERN UNIVERSITY BENEFITS2014

    E-print Network

    Shahriar, Selim

    NORTHWESTERN UNIVERSITY BENEFITS2014 #12;Choosing Your 2014 Benefits The benefit plans Northwestern, and to assist with college expenses. The University's comprehensive benefits program is competitive with those of other top-tier universities and Chicago-area employers. The Benefits Division of the Office of Human

  2. NORTHWESTERN UNIVERSITY VETERANS AND

    E-print Network

    Staum, Jeremy

    NORTHWESTERN UNIVERSITY VETERANS AND Individuals WITH Disabilities JOB FAIR Northwestern University is Pleased to Announce its 2nd Annual Veterans and Individuals with Disabilities JOB FAIR! In honor and recognition of Veterans and National Disability Employment Awareness Month, you are invited to come out

  3. Research Computing at Northwestern University

    E-print Network

    Shahriar, Selim

    Advanced Research Computing at Northwestern University 2014­2015 Northwestern University University Library and NUIT have partnered on the development of new research computing consulting space & Proposal Consultation: One-on-one consultation for defining requirements for research computing, authoring

  4. AT NORTHWESTERN SKIN CANCER INSTITUTE

    E-print Network

    Engman, David M.

    research. We are the Chicago area's leading site for the care of patients with skin cancers (includingTHE CANCER INSTITUTES AT NORTHWESTERN MEDICINE SKIN CANCER INSTITUTE THE INSTITUTES AT NORTHWESTERN MEDICINE #12;THE INSTITUTES AT NORTHWESTERN MEDICINE "Through the Skin Cancer Institute, we are endeavoring

  5. INSTITUTES AT NORTHWESTERN

    E-print Network

    Engman, David M.

    revolutionized how we deliver modern medicine to patients. Treatments for breast cancer, AIDS, leukemia for the treatment of cancer." Leonidas C. Platanias, MD, PhD, Interim Director of the Lurie Cancer Center and JesseTHE CANCER INSTITUTES AT NORTHWESTERN MEDICINE DEPARTMENT OF CANCER BIOLOGY THE INSTITUTES

  6. [Type text] Northwestern University

    E-print Network

    Shull, Kenneth R.

    [Type text] Northwestern University Office for Research Safety Hazardous Waste Management Program ­ Radiation & Laser Safety Officer Office: (847) 467-0634 24-hour pager: (312) 661-3858 Cell 708 668 8042 (Evanston) (847) 570-2000 STATE AND LOCAL AGENCIES Metropolitan Water Reclamation District (NWRD) (312) 787

  7. University Services Northwestern University

    E-print Network

    Shahriar, Selim

    . RIDGEAVE. MAPLEAVE. WESLEYAVE. JACKSONAVE. ASHLANDAVE. CHURCH ST. DAVIS ST. CLARK ST. UNIVERSITY PLUniversity Services Northwestern University 710 N. Lake Shore Drive Chicago, IL 60611 tel: 312 Shuttles provide the University community with a safe way to get around the Evanston campus during evening

  8. Northwestern University Transportation Center

    E-print Network

    MacIver, Malcolm A.

    , while continuing to advance the state of fundamental and applied knowledge in areas of traditionalNorthwestern University Transportation Center NUTC 2010 Progress Report #12;DIRECTOR'S MESSAGE, as the tradition lives on, and the Center continues to renew itself and engage faculty and students with new

  9. Northwestern University Recombinant DNA

    E-print Network

    Shull, Kenneth R.

    Northwestern University Recombinant DNA Safety Program Office of Research Safety Office of the Vice deoxyribonucleic acid (DNA) shall comply with the National Institute of Health's "Guidelines for Research Involving Recombinant DNA Molecules" (NIH Guidelines) as published in the Federal Register (www

  10. Northwestern University Transportation Center

    E-print Network

    Bustamante, Fabián E.

    Northwestern University Transportation Center 2011 Business Advisory Committee NUTC #12;#12;I have the pleasure of presenting our Business Advisory Committee members--a distinguished group of transportation industry lead- ers who have partnered with the Transportation Center in advancing the state of knowledge

  11. RESEARCH BUILDING AT NORTHWESTERN

    E-print Network

    Engman, David M.

    BIOMEDICAL RESEARCH BUILDING AT NORTHWESTERN MEDICINE #12;"Our new Biomedical Research Building-intensive medical schools. Perkins+Will has designed a building that will be superbly functional and have great a magnificent 12-story Biomedical Research Building to address this priority. The new 600,000 square foot

  12. Tertiary geodynamical evolution of northwestern Greece: paleomagnetic results

    Microsoft Academic Search

    Catherine Kissel; Carlo Laj; Carla Müller

    1985-01-01

    Paleomagnetic results have been obtained from 29 sites sampled in Lower to Upper Oligocene flysch sections of the Ionian Zone in northwestern Greece. They indicate a clockwise rotation of about 45° of the entire region. A comparison with previously published results relative to both younger and older formations shows that this rotation has occurred in two phases of comparable amplitude,

  13. Blastomycosis in Northwestern Ontario

    PubMed Central

    McIntyre, Lynn

    1985-01-01

    Nine cases of blastomycosis were seen at the Sioux Lookout Zone Hospital in northwestern Ontario from 1970 to 1983. Although this region has been described as a focus of endemic infection, little published information is available. Seven male and two female Canadian Indians, aged 4-54 years, acquired the infection. Three children were infected; a mother and her son became ill one month apart. All cases presented as progressive pulmonary disease and no extrapulmonary involvement was found. Delay in diagnosis ranged from 11 days to eight weeks, with a mean of 31 days. Patients generally responded favorably to treatment with amphotericin B. Epidemiologic data suggest that environmental, geographic, occupational and recreational determinants are necessary factors in disease acquisition. PMID:21279155

  14. Modeling an air pollution episode in northwestern United States: Identifying the effect of nitrogen oxide and volatile organic compound emission changes on air pollutants formation using direct sensitivity analysis

    Microsoft Academic Search

    Alexandra P. Tsimpidi; Marcus Trail; Yongtao Hu; Athanasios Nenes; Armistead G. Russell

    2012-01-01

    Air quality impacts of VOCs and NOx emissions from major sources over the northwestern United States are simulated. The comprehensive nested modeling system is comprised of three models: CMAQ, WRF and SMOKE. In addition, the DDM-3D is used to determine the sensitivities of pollutant concentrations to changes in precursor emissions during a severe smog episode in July of 2006. The

  15. Northwestern University Program in Public Health

    E-print Network

    Contractor, Anis

    Northwestern University Program in Public Health Faculty Handbook 2011-2012, v. 3 #12;Northwestern University Program in Public Health Faculty and Advisor Handbook, 2011-2012 v. 3.0 http? .........................................................................................3 Competencies

  16. NORTHWESTERN UNIVERSITY Information Technology Strategic Plan

    E-print Network

    Shull, Kenneth R.

    NORTHWESTERN UNIVERSITY Information Technology Strategic Plan 2012 2014 #12;Information technology and services. As the University's information technology organization, Northwestern University Information Technology (NUIT) is committed to listen and lead in the delivery of technology services and information

  17. Aleksandar Kuzmanovic Northwestern University akuzma@northwestern.edu

    E-print Network

    Kuzmanovic, Aleksandar

    University of Belgrade, Belgrade, Serbia Thesis: An Improved Flow Control Algorithm for the ITU-T T.125, Belgrade, Serbia Honors and Awards Associated Student Government (ASG) Faculty Honor Roll, Northwestern for available bandwidth estimation on an Internet path. Mihajlo Pupin Institute of Technology, Belgrade, Serbia

  18. CHEMISTRY CONNECTION Northwestern University Department of Chemistry

    E-print Network

    Grzybowski, Bartosz A.

    CHEMISTRY CONNECTION Northwestern University Department of Chemistry In this Issue Faculty News 2. The team, representing four departments and schools at Northwestern (Chemistry, Kellogg/ Business, Law is stored in motor vehicle gas tanks. Omar Farha, Chemistry Research Associate Professor, along with Chris

  19. NORTHWESTERN UNIVERSITY Animal Care and Use Committee

    E-print Network

    Shahriar, Selim

    NORTHWESTERN UNIVERSITY Animal Care and Use Committee Reporting Concerns Regarding Animal Treatment All animals used at Northwestern University (NU) must be handled, housed, treated, cared for person having reason to question the treatment of animals at NU is encouraged to report incidents

  20. Subduction of the Eastern Panama Basin and Seismotectonics of Northwestern South America

    Microsoft Academic Search

    Wayne D. Pennington

    1981-01-01

    Spreading along the Cocos-Nazca plate boundary since the breakup of the Farallon plate in the Miocene has resulted in the formation of the Panama basin and a complex interaction of plates in and near northwestern South America. Current plate boundaries have been defined, and segments of subducted lithosphere identified through selection of hypocentral locations of earthquakes, considering only welllocated events,

  1. Paleozoic-early Mesozoic gold deposits of the Xinjiang Autonomous Region, northwestern China

    Microsoft Academic Search

    Zongyao Rui; Richard J. Goldfarb; Yumin Qiu; Taihe Zhou; Renyi Chen; Franco Pirajno; Grace Yun

    2002-01-01

    The late Paleozoic-early Mesozoic tectonic evolution of Xinjiang Autonomous Region, northwestern China provided a favorable geological setting for the formation of lode gold deposits along the sutures between a number of the major Eastern Asia cratonic blocks. These sutures are now represented by the Altay Shan, Tian Shan, and Kunlun Shan ranges, with the former two separated by the Junggar

  2. The late miocene climatic change—persistence of a climatic signal through the orogenic stratigraphic record in northwestern Argentina

    Microsoft Academic Search

    D. Starck; L. M. Anzótegui

    2001-01-01

    From the analysis of stratigraphic sections located in different areas of northwestern Argentina, an important climatic change was defined. This change, which took place during the late Miocene, is widely represented in the whole region (and in other latitudes). It is best displayed in the Calchaqu?? Valley, across the contact between the Angastaco and Palo Pintado Formations. The Angastaco Formation

  3. Northwestern Investigator's Guide to Starting a Company

    E-print Network

    ? ......................................................................... 6 For-profit or non-profit1 Northwestern Investigator's Guide to Starting a Company acknowledgment to the University of Georgia for permission to use material from "Start

  4. Departments | Centers | Institutes Northwestern University Feinberg School of Medicine

    E-print Network

    Chisholm, Rex L.

    Departments | Centers | Institutes Northwestern University Feinberg School of Medicine The Northwestern University Feinberg School of Medicine has many excellent departments, centers, institutes offerings with the creation of the Institute for Public Health & Medicine, which combined interdisciplinary

  5. 2013 WEEKLY BULLETIN DEPARTMENT OF CHEMISTRY, NORTHWESTERN UNIVERSITY

    E-print Network

    Chisholm, Rex L.

    2013 WEEKLY BULLETIN DEPARTMENT OF CHEMISTRY, NORTHWESTERN UNIVERSITY EVANSTON, ILLINOIS September see the Department Calendar: http://www.chemistry.northwestern.edu/events/calendar.html Arrivals Junling Sun joined the Stoddart group. Dongyang Chen joined the Stoddart group. Zhuang Xie joined

  6. Northwestern Memorial Hospital v. Ashcroft.

    PubMed

    2004-01-01

    Court Decision: 362 Federal Reporter, 3d Series 923; 2004 Mar 26 (date of decision). The U.S. Court of Appeals for the Seventh Circuit affirmed a lower court decision that quashed a Department of Justice subpoena seeking late-term abortion patients' medical records because the subpoena unduly burdened the hospital and provided limited probative value compared to the consequent harm to patients and the hospital. The Department of Justice issued Northwestern Memorial Hospital a subpoena seeking records for use in a case challenging the constitutionality of the Partial-Birth Abortion Ban Act. Although the administrative hardship of compliance would be modest, the Seventh Circuit found that, as a result of compliance, the hospital could lose the confidence of its patients, people could be inclined to seek care at other hospitals, and there would be an invasion of patient privacy even if there is no possibility of learning the patient's identity. The burden of compliance would exceed the benefit of producing the requested medical records. The court declined to base its holding on Health Insurance Portability and Accountability Act (HIPAA) regulations or federal common law and found that neither privileged the information sought by the subpoena. PMID:16477725

  7. STUDENT HANDBOOK Northwestern University School of Continuing Studies

    E-print Network

    Shahriar, Selim

    STUDENT HANDBOOK Northwestern University School of Continuing Studies Undergraduate and Post-baccalaureate Certificate Programs 2013-2014 #12;UNDERGRADUATE STUDENT HANDBOOK 2013-2014 NORTHWESTERN UNIVERSITY SCHOOL-baccalaureate Student Handbook Welcome to Northwestern University School of Continuing Studies' undergraduate and post

  8. The oldest South American tuco-tuco (late Pliocene, northwestern Argentina) and the boundaries of the genus Ctenomys (Rodentia, Ctenomyidae)

    Microsoft Academic Search

    Diego H. Verzi; A. Itatí Olivares; Cecilia C. Morgan

    2010-01-01

    A new species of Ctenomyidae from the late Pliocene of Uquía Formation (northwestern Argentina) is described. The new remains consist of a fragmentary rostrum, and a left mandible with partial lower dentition. Its phylogenetic affinity and morphological specializations for tooth-digging support its assignation to the South American rodent genus Ctenomys. In this context, we highlight the importance of unique morphological

  9. Ecotypic response to ultramafic soils by some plant species of northwestern United States

    Microsoft Academic Search

    Arthur R. Kruckeberg

    1967-01-01

    Soils high in magnesium derived from ultramafic rocks (serpentine, peridotite, and dunite) in northwestern United States support\\u000a endemic as well as wide-ranging but edaphically indifferent(bodenvag) species. The latter occur widely on diverse rock formations of the region. Severalbodenvag species are shown to respond ecotypically to ultramafic soils. Of 18 species tested, all but three are differentiated into\\u000a strains either tolerant

  10. Geology and petroleum resources of northwestern Africa

    Microsoft Academic Search

    J. A. Peterson; H. D. Klemme

    1986-01-01

    The main onshore basins of northwestern Africa are (1) basins in the Atlas folded geosynclinal belt adjacent to the Mediterranean Sea, (2) the Tindouf, Bechar, and Reggane basins of western Algeria and southern Morocco, and (3) the Taoudeni basin of Mauritania and Mali. Coastal basins are (1) the Essaouria basin of southwestern Morocco, (2) the Tarfaya basin of Western Sahara,

  11. Northwestern University Audiology Clinic 2240 Campus Drive

    E-print Network

    Northwestern University Audiology Clinic 2240 Campus Drive Evanston, IL 60208 847/491-3165 Tinnitus of your tinnitus. Please answer YES, SOMETIMES or NO to each question and tally the totals at the bottom. Please do not skip any questions. F 1. Because of your tinnitus, is it difficult for you to concentrate

  12. Northwestern EECS 213 SETI Lab (Beta Test)

    E-print Network

    Dinda, Peter A.

    for Extraterrestrial Intelligence (SETI) is a long-standing international effort to try to findNorthwestern EECS 213 SETI Lab (Beta Test) Spring 2013 The Search for a specific kind of intelligent signal within it, specifically an AM radio signal

  13. Middle proterozoic compressional orogen in northwestern Canada

    Microsoft Academic Search

    Frederick A. Cook

    1988-01-01

    Evidence from seismic reflection profiling, drill holes, potential field measurements and regional geology shows that an east verging Proterozoic thin-skinned thrust and fold belt is situated beneath the Interior Platform of northwestern Canada. Balanced cross sections and associated palinspastic reconstructions provide constraints on the extent of the shortening in the thrust belt and suggest that at least 50-90 km of

  14. Northwestern University Office of Human Resources

    E-print Network

    Shahriar, Selim

    Act (FLSA) Background and Purpose The Fair Labor Standards Act (FLSA) is a U.S. Federal Law enactedNorthwestern University Office of Human Resources 1 Exempt or Not Exempt? The Fair Labor Standards child labor Set minimum wage Require overtime pay Require equal pay (prohibit sex based wage

  15. Northwestern Hawaiian Islands Coral Reef Ecosystem Reserve

    NSDL National Science Digital Library

    Describes the unique Northwestern Hawaiian Islands (NWHI) Ecosystem Reserve. Provides resources focused on NWHI coral reef ecosystems, and introductions to reef research, management and protection activities. Educational outreach includes: teacher workshops; student activities, and a Discovery Center in Hilo, Hawaii that features exhibits and activities for schools and the public.

  16. Anomalously deep earthquakes in northwestern Italy

    Microsoft Academic Search

    Marco Cattaneo; Paolo Augliera; Stefano Parolai; Daniele Spallarossa

    1999-01-01

    It is usually assumed that earthquakes in intraplate regions occur in the upper crust, and northwestern Italy is generally assigned to this kind of ‘normal’ seismicity. In this work, the depth distribution of the events localized in this area by the Istituto Geofisico Geodetico (IGG) seismic network in the period 1991–1997 is analyzed in detail. In particular, the location capability

  17. NORTHWESTERN UNIVERSITY Dynamical Aspects of Information Storage

    E-print Network

    Raginsky, Maxim

    , quantum registers and computers. Strictly contractive channels are simple enough, yet exhibit veryNORTHWESTERN UNIVERSITY Dynamical Aspects of Information Storage in Quantum-Mechanical Systems OF PHILOSOPHY Field of Electrical and Computer Engineering By Maxim Raginsky EVANSTON, ILLINOIS June 2002 #12;c

  18. 40 CFR 81.184 - Northwestern Connecticut Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Northwestern Connecticut Intrastate Air Quality Control Region. 81.184 Section...PURPOSES Designation of Air Quality Control Regions § 81.184 Northwestern Connecticut Intrastate Air Quality Control Region. The Northwestern...

  19. 40 CFR 81.184 - Northwestern Connecticut Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Northwestern Connecticut Intrastate Air Quality Control Region. 81.184 Section...PURPOSES Designation of Air Quality Control Regions § 81.184 Northwestern Connecticut Intrastate Air Quality Control Region. The Northwestern...

  20. Typhoon Activity in August 2014 in the Northwestern Pacific

    NASA Astrophysics Data System (ADS)

    Kang, KiRyong; Hyoun, Yoo-Sun; Cha, Youmi; Yun, Won-Tae

    2015-04-01

    In the Northwestern Pacific area, August is the most active period for typhoon formation, development, and decay. But, last year, 2014, has become the first year that there was no typhoon genesis activity in this area in August since 1951, excluding typhoon Genevieve (1413) that crossed the dateline on August 7, 2014, from the East Pacific area. This study tried to check the monthly mean distribution of typhoon genesis-related factors and to simply compare with their climatological mean values in order to investigate the reason that the typhoon formation was inhibited during this period. The data used in this study was the re-analyzed data set produced by NCEP/NCAR/NOAA, USA. According to results, there were several conditions to inhibit the typhoon formation activities: i) the relative vorticity in 850 hPa showed negative anomaly indicating that there is less chance of initial formation, ii) the outgoing longwave radiation (OLR) displayed a condition to suppress the vertical flow of atmosphere, iii) the velocity potential of the upper layer (200 hPa) was negative anomaly in the Equatorial area, and iv) the strength of the west wind pattern around Philippine area which is a signal when typhoon formation is occurring, was also weak compared to the climatological value indicating that there was relatively strong east wind. However there were also favorable conditions for typhoon formation such as positive anomaly of SST and over 29 oC in mean value, positive anomaly of relative humidity of middle layer (700 hPa), and negative anomaly of vertical velocity shear in south area of 15 oN. These environmental conditions looked like having relationship to the mean distribution of the North Pacific Subtropical High on August. For example, looking at the distribution of geopotential height 5880, it much more extended to southwest than climatological pattern. Keywords: Typhoon genesis activity, relative vorticity, outgoing longwave radiation, North Pacific Subtropical High

  1. Upper Campanian-lower Maastrichtian sections of the northwestern Rostov region. Article 1. Description, paleontological assemblages, and lithobiostratigraphy

    NASA Astrophysics Data System (ADS)

    Benyamovskiy, V. N.; Alekseev, A. S.; Ovechkina, M. N.; Vishnevskaya, V. S.; Podgaetskii, A. V.; Pronin, V. G.

    2012-07-01

    Four upper Campanian-lower Maastrichtian reference sections are described in the Glubokaya and Kalitva river basins and in the Znamenka 1-A Borehole located in the northwestern Rostov region. The sections are composed of the upper Campanian Kagal'nik, Belgorod, Pavlovka, Sukhodol and lower Maastrichtian Efremovo-Stepanovka formations. They are characterized by successive stratigraphically significant macro- and microfossil assemblages: belemnites, calcareous nannoplankton, benthic foraminifers, and radiolarians. The Pavlovka and, particularly, Sukhodol formations contain a specific assemblage of coarsely-agglutinated benthic foraminifers. The first data obtained on radiolarians in upper Campanian-lower Maastrichtian sections of the northwestern Rostov region revealed four assemblages, two of which were previously unknown from Upper Cretaceous sediments of the East European Platform. Most sections enclose a hiatus at the base of the Sukhodol Formation, which comprises two upper Campanian benthic foraminiferal zones. The problem of recognition of the lower Maastrichtian boundary on the East European Platform is considered in accordance with international GSSP requirements.

  2. Northwestern University Feinberg School of Medicine 2009 Award Winners

    E-print Network

    Chisholm, Rex L.

    Northwestern University Feinberg School of Medicine 2009 Award Winners Fifth Annual Lewis Landsberg precision performance measurement embedded within an electronic health record Third Place, Clinical Science

  3. Northwestern University | Physical Sciences in Oncology

    Cancer.gov

    Northwestern University Physical Sciences-Oncology Center's (NU PS-OC) main focus is to probe the molecular basis of information flow within malignant cells. This center’s studies will highlight diverse characteristics of gene expression and storage. Moreover, these investigators postulate that in the cancerous state, the epigenome is significantly mutated. By merging experimental molecular and cellular biology with the physical sciences, these investigators will examine the regulation and expression of genes.

  4. Uranium in saline lakes of Northwestern Mongolia

    Microsoft Academic Search

    V. P. Isupov; A. G. Vladimirov; N. Z. Lyakhov; S. L. Shvartsev; S. Ariunbileg; M. N. Kolpakova; S. S. Shatskaya; L. E. Chupakhina; L. V. Kuibida; E. N. Moroz

    2011-01-01

    Analysis of major- and trace-element compositions of water in hypersaline soda closed basin lakes of Northwestern Mongolia\\u000a and Chuya basin (Gorny Altai) shows high enrichment in 238U (up to 1 mg\\/l). Proceeding from new data, uranium accumulation in water has been attributed to (i) location of the lakes\\u000a and their watersheds in potential provinces of U-bearing rocks and (ii) uranium

  5. Integrated Ediacaran chronostratigraphy, Wernecke Mountains, northwestern Canada

    Microsoft Academic Search

    Leanne J. Pyle; Guy M. Narbonnea; Noel P. James; Robert W. Dalrymple; Alan J. Kaufman

    2004-01-01

    Terminal Neoproterozoic (Ediacaran, ca. 600-543 Ma) strata of the upper part of the Windermere Supergroup are well-exposed in the Mackenzie Mountains and the Wernecke Mountains of northwestern Canada. Windermere strata in the Mackenzie Moun- tains contain an exceptional Ediacaran biostratigraphic and isotopic (C and Sr) record, while the sequence stratigraphic record is subtle throughout this predominantly deep-water succession. Coeval strata

  6. Lake Trout Movements in Northwestern Lake Michigan

    Microsoft Academic Search

    Patrick J. Schmalz; Michael J. Hansen; Mark E. Holey; Patrick C. McKee; Michael L. Toneys

    2002-01-01

    We quantified the distance that lake troutSalvelinus namaycushmoved in northwestern Lake Michigan and examined (1) the directional preference and (2) the effect of population density on movement. Lake trout were captured in spring and fall 1983-1996, tagged with Floy anchor tags, and recaptured during subsequent agency sampling and by commercial fishers and anglers during 1983-1997. Angler recaptures were used to

  7. Industrial impact in Northwestern Whatcom County, Washington

    Microsoft Academic Search

    Ronald J. Taylor

    1978-01-01

    A field study designed to determine the nature and extent of environmental impact by an industrial complex was carried out during the period 1966–76. The industrial complex consists of two oil refineries, Mobil and Atlantic Richfield (ARCO), and an aluminium reduction plant, Intalco. The location is northwestern Whatcom County, Washington, U.S.A. The study consisted of critical examination of native, exotic,

  8. Exploration strategy in Keg River carbonates of northwestern Alberta, Canada

    SciTech Connect

    Majid, A.H.

    1987-05-01

    The analysis of reservoir quality and seal capacity of the Middle Devonian Keg River carbonate reservoirs in northwestern Alberta requires facies studies of rock units of the Keg River Formation and of the overlying Muskeg and Sulphur Point formations. Using lithologic criteria, faunal type, and stratigraphic positions, the entire sequence is subdivided into ten major facies. The system used is that of standard facies belts with second-order modification to Wilson's terminology. These facies are (from basin to land): basin, open sea shelf, toe of slope, foreslope, organic buildup, shoal lime sand, open lagoon, restricted lagoon, tidal flats, and sabkha evaporites. The upper member of the Keg River Formation is the main hydrocarbon reservoir in the study area. It consists of floatstone, rudstone, and boundstone with wackestone, packstone, and grainstone matrix. The principal faunal constituents are crinoids, brachiopods, stromatoporoids, corals, and stachyodes. The reservoir porosity is of primary intergranular and intragranular and secondary vugular textures. The upper Keg River member is composed of two major facies: patch reefs and banks. Both facies are formed in an open lagoon environment fronted by Presqu'ile barrier to the west-northwest. Water depth was the main factor in controlling the distribution of the bank and patch reef facies. Patch reefs were developed in areas of deeper water, whereas banks were formed in shallower areas of the open lagoon. Recent analogs of the Keg River buildups are found on the Bermuda Platform and Belize Shelf. A direct relationship exists between the thickness of overlying anhydrites of the Muskeg Formation and hydrocarbon occurrences in the Keg River Formation. Generally in areas where patch reefs are developed, the thickness of the anhydrite is more than 30 ft. However, areas of bank are covered by less than 30 ft of anhydrite.

  9. Biostratigraphic interpretation for the cyclic sedimentation in northwestern Libya

    SciTech Connect

    Tekbali, A.O.; Cornell, W.C. (Univ. of Texas at El Paso, (United States) Dept. of Geological Sciences)

    1993-02-01

    Mesozoic sediments in western Libya are best exposed along the Jabal Nafusah escarpment. This northeast-southwest trending structure overlooks the Al Jifarah plain and extends more than 300 km westward to connect with a T-shaped anticlinorium in Algeria and Tunisia. The Al Aziziyan fault (normal, north side down) parallels the northern edge of the escarpment and marks its initial position. Alternate deposition of marine and continental sediments began in the Triassic before the formation of a major monocline in the Late Jurassic-Early Cretaceous time. Subsequent epiorogenic movements and isostatic adjustments initiated a westward sloping shelf along the southern edge of the Tethys. As a result, the eastern and central regions of western Libya were subjected to severe erosion and coalescing of unconformities towards the topographic highs, prior to the deposition of the overstepping Kiklah Formation. Geometrical and physical interpretation of the Mesozoic sediments in the region, combined with paleogeographic reconstruction indicate that the post-Hercynian epiorogenic adjustments and fluctuations of the Tethys resulted in local cyclic sedimentation. Accurate age assessment of the boundaries between the Jurassic-Early Cretaceous facies in northwestern Libya can be carried out on the basis of microfloral and faunal distribution and makes possible correlation of aquifers and probable oil-bearing sequences in western Libya.

  10. PAIN MEDICINE CENTER INSTITUTE FOR TRANSLATIONAL NEUROSCIENCE AT NORTHWESTERN MEDICINE

    E-print Network

    Engman, David M.

    PAIN MEDICINE CENTER INSTITUTE FOR TRANSLATIONAL NEUROSCIENCE AT NORTHWESTERN MEDICINE Pain diseases such as diabetes and stroke. The outpatient Pain Medicine Center within the Department of Anesthesiology at Northwestern Medicine offers hope to patients with chronic pain. Starting with a comprehensive

  11. Internship Search Timeline University Career Services Northwestern University

    E-print Network

    Shull, Kenneth R.

    Internship Search Timeline University Career Services Northwestern University Research your is a general internship search timeline designed to help you organize and conduct an effective internship search. September/October Register with Northwestern's CareerCat and iNet. Sign-up for the Internship

  12. Internship Search Survey 2011-2012 Northwestern University Career Services

    E-print Network

    Shull, Kenneth R.

    Internship Search Survey 2011-2012 Northwestern University Career Services Executive Summary The Internship Search Survey conducted by Northwestern University Career Services (UCS) was formally introduced searching for an internship. The survey was hosted and data was collected from Campus Labs, an online survey

  13. NORTHWESTERN UNIVERSITY PHYSICAL THERAPY ALUMNI ASSOCIATION ARTICLE I. NAME

    E-print Network

    Chisholm, Rex L.

    1 NORTHWESTERN UNIVERSITY PHYSICAL THERAPY ALUMNI ASSOCIATION BY-LAWS ARTICLE I. NAME The name of this Association is the Northwestern University Physical Therapy Alumni Association, hereinafter referred therapy graduates and promotes continued interest in, communication with, and support of physical therapy

  14. ra.mccormick.northwestern.edu Revised 11/3/11

    E-print Network

    Shull, Kenneth R.

    .491.7820 Susan Morris Research Administrator, Biomedical Engineering (BME) semorris@northwestern.edu Tech M328 Science and Engineering (MSE) farrin@northwestern.edu Cook Hall 1081 Phone: 847.491.3213 Fax: 847 Phone: 847.491.7341 Fax: 847.491.4928 Kelly Morrison Research Administrator, Mechanical Engineering (ME

  15. BTOLOGY OF THE PORCUPINE (ERETHIZON DORSATUM) IN NORTHWESTERN SOUTH DAKOTA

    E-print Network

    BTOLOGY OF THE PORCUPINE (ERETHIZON DORSATUM) IN NORTHWESTERN SOUTH DAKOTA by Judith Johnson in Wildlife and Fisheries Science South Dakota State University 1977 #12;BIOLOGY OF THE PORCUPINE (ERETHIZON DORSATUM) IN NORTHWESTERN SOUTH DAKOTA This thesis is approved as a.creditable and independent

  16. ra.mccormick.northwestern.edu Revised 10/9/11

    E-print Network

    Shull, Kenneth R.

    ra.mccormick.northwestern.edu Revised 10/9/11 Farrin Abbott Research Administrator, Materials.491.7820 TBD Director of Research Administration @northwestern.edu Tech L365 Phone: 847.467.0343 Fax: 847.467.0362 Deborah Cundiff Associate Director of Research Administration (serving Materials Research Institute

  17. NorthWestern Energy Community Works Scholarship for Electrical Engineering

    E-print Network

    Lawrence, Rick L.

    ,000 miles of electrical transmission lines, 17,300 miles of electrical distribution lines, 2,000 miles20121204 NorthWestern Energy Community Works Scholarship for Electrical Engineering A special new Electrical Engineering, NorthWestern Energy has established a scholarship program administered by the Montana

  18. NorthWestern Energy Community Works Scholarship for Electrical Engineering

    E-print Network

    Dyer, Bill

    ,000 miles of electrical transmission lines, 17,300 miles of electrical distribution lines, 2,000 miles20131030 NorthWestern Energy Community Works Scholarship for Electrical Engineering A special Electrical Engineering, NorthWestern Energy has established a scholarship program administered by the Montana

  19. Information Technology Bboogle, Northwestern's Google Apps & Blackboard Integration

    E-print Network

    Shahriar, Selim

    Information Technology Bboogle, Northwestern's Google Apps & Blackboard Integration Interim Report developed at Northwestern, is an add-in product for the Blackboard Learn System. Bboogle allows instructors to integrate Google Apps for Education functions with Blackboard, promoting peer learning and collaboration

  20. New records of mosquitoes from northwestern Argentina.

    PubMed

    Dantur Juri, María J; Stein, Marina; Rossi, Gustavo C; Navarro, Juan Carlos; Zaidenberg, Mario; Sallum, María A Mureb

    2012-06-01

    Eleven mosquito species, namely Aedes hastatus, Ae. fulvus, Coquillettidia albicosta, Cq. juxtamansonia, Culex aliciae, Cx. delpontei, Cx. oedipus, Cx. pedroi, Mansonia flaveola, Uranotaenia leucoptera, and Wyeomyia oblita, are recorded for the first time from northwestern Argentina. In addition, 3 species, Cx. brethesi, Limatus durhami, and Ur. nataliae, are reported for the first time from Salta Province. These records extend the geographical distribution of these 3 species to Salta Province. This study also extends the geographical distributions of Cq. nigricans, Cx. chidesteri, and Ma. humeralis to Jujuy Province and of Ae. meprai, Ae. milleri, Ae. oligopistus, Cx. brethesi, Cx. fernandezi, and Cx. tatoi to Tucumán Province. PMID:22894121

  1. Stratigraphy and palaeoceanography of the Cenomanian-Turonian Boundary Event in Oued Mellegue, north-western Tunisia

    Microsoft Academic Search

    Alexandra J Nederbragt; Andrea Fiorentino

    1999-01-01

    An expanded Cenomanian-Turonian section along Oued Mellegue in north-western Tunisia provides a high-resolution record of the latest Cenomanian Oceanic Anoxic Event in an upper bathyal, pelagic to hemipelagic environment. A rapid >2|Pg positive excursion in |MD13C starts at the base of the organic-rich Bahloul Formation, which represents the Cenomanian-Turonian Boundary Event (CTBE) in Tunisia. The transition to a dysaerobic environment

  2. Compositional and crystallographic data on REE-bearing coffinite from the Grants uranium region, northwestern New Mexico

    Microsoft Academic Search

    P. L. Hansley; J. J. Fitzpatrick

    2009-01-01

    Paired substitution of Y and P in coarse-grained coffinite from the Upper Jurassic Morrison Formation in the Grants uranium region, northwestern New Mexico, indicates that coffinite forms an isomorphous series with xenotime, which is isostructural with thorite and zircon. Quantitative electron-microprobe analyses of coffinite crystals (>10 μm) demonstrate that significant amounts of Ca, Y, and rare-earth elements (REEs) proxy for

  3. Seismicity and seismotectonics of northwestern Libya

    NASA Astrophysics Data System (ADS)

    Ben Suleman, Abdunnur; Elmeladi, Abdalla

    2014-05-01

    As a result of the relative motion of the African and European plates, Libya has experienced a considerable intraplate tectonism particularly at its northern regions. In this study we investigate the seismic activity and the seismotectonics of northwestern Libya. The northwestern part of Libya has experienced a number of earthquakes including earthquakes of magnitude greater than six. The seismic activity shows three major seismic trends. The first trend is a NW-SE trending cluster of seismicity coinciding with the eastern boarder of the Hun Graben. A second trend is also a NW-SE direction in the offshore area northern of the city of Misuratah. The third cluster was located in the western Gulf of Sirt. The rest of seismicity is diffuse either offshore or in land, with no good correlation with well-mapped faults. Fault plane solution was estimated for 17 earthquakes recorded by the Libyan National Seismograph Network. Fault plain solution for the first area suggests oblique reverse to strike slip faulting with dominant compressional P-axes trending NW-SE and NE-SW. The second area suggests strike-slip to reverse faulting with dominant compressional P-axes trending NW-SE and NE-SW. Fault plain solution for 3 earthquakes located southern Tripoli suggests an oblique normal faulting with dominant compressional P-axes trending E-W to NE-SW. Further west to the Tunisian boarder, fault plain solution suggests oblique normal faulting with dominant compressional P-axes trending NW-SE.

  4. Exhumation history of the Northwestern Tibet

    NASA Astrophysics Data System (ADS)

    Huang, Wei-Huan; Lee, Yuan-His; Xin, Wang

    2015-04-01

    In order to reveal the exhumation history in northwestern Tibet we use fission track, U-Th/He dating to revealtheexhumation history along the mountain front of eastern side of the Pamir plateau (western side of Kunglun Mountain). The structural style shows thrusting and strike-slip fault dominantly in the mountain front and it becomes normal fault dominantly in the internal of the mountain belt. We collect two 40 km length transects from deformation front to mountain belt. The preliminary results show the resetzircon fission track ages range from ca.25 to 7 Ma, the Zircon U-Th/He ages range fromca. 2-17Ma, apatite fission track ages range from ca. 3-6 Ma, and apatite U-Th/He range fromca. 2-10?a. Some Zircon and apatite U-Th/He ages are similar ca. 2 and 5 Ma that indicates the developing timing of shear zone. The preliminary result shows the Cenozoic exhumation started from ca. 25 Ma and increases the exhumation rate since the ca. Pliocene in northwestern Tibet. The exhumation amount and rate progressively increases from southeast to northwest that is consistent with the topography variation. We suspect that increasing the exhumation rate and topography toward to the northwest result from the collision between the India plate and Eurasia plate.

  5. Biogeochemistry of a treeline watershed, northwestern Alaska

    USGS Publications Warehouse

    Stottlemyer, R.

    2001-01-01

    Since 1950, mean annual temperatures in northwestern Alaska have increased. Change in forest floor and soil temperature or moisture could alter N mineralization rates, production of dissolved organic carbon (DOC) and organic nitrogen (DON), and their export to the aquatic ecosystem. In 1990, we began study of nutrient cycles in the 800-ha Asik watershed, located at treeline in the Noatak National Preserve, northwestern Alaska. This paper summarizes relationships between topographic aspect, soil temperature and moisture, inorganic and organic N pools, C pools, CO2 efflux, growing season net N mineralization rates, and stream water chemistry. Forest floor (O2) C/N ratios, C pools, temperature, and moisture were greater on south aspects. More rapid melt of the soil active layer (zone of annual freeze-thaw) and permafrost accounted for the higher moisture. The O2 C and N content were correlated with moisture, inorganic N pools, CO2 efflux, and inversely with temperature. Inorganic N pools were correlated with temperature and CO2 efflux. Net N mineralization rates were positive in early summer, and correlated with O2 moisture, temperature, and C and N pools. Net nitrification rates were inversely correlated with moisture, total C and N. The CO2 efflux increased with temperature and moisture, and was greater on south aspects. Stream ion concentrations declined and DOC increased with discharge. Stream inorganic nitrogen (DIN) output exceeded input by 70%. Alpine stream water nitrate (NO-3) and DOC concentrations indicated substantial contributions to the watershed DIN and DOC budgets.

  6. Foraminiferal isotope anomalies from northwestern Pacific marginal sediments

    NASA Astrophysics Data System (ADS)

    Ohkushi, Ken'ichi; Ahagon, Naokazu; Uchida, Masao; Shibata, Yasuyuki

    2005-04-01

    We evaluated the influence of methane release from methane hydrate reservoirs in the northwestern Pacific continental margin on stable isotope values. We analyzed stable isotopes of foraminifera from a piston core collected at 1066-m water depth off eastern Hokkaido, northern Japan. Carbon isotope signals indicated that planktonic and benthic foraminifera in several glacial sediment layers in the core were highly depleted in 13C; both the planktonic and benthic foraminiferal ?13C values ranged from about -10‰ to -2‰. Most foraminiferal tests in these horizons were brown as a result of postdepositional alteration. Foraminiferal oxygen isotopes fluctuated abnormally in the glacial sediment layers, showing small (about 0.5‰) positive shifts relative to normal glacial values. We attributed the positive shifts to authigenic carbonate formation in the foraminiferal tests. The authigenic carbonates have formed when rising methane, from methane hydrate in the sediment, became oxidized as it came in contact with dissolved sulfate near the seafloor. Episodic methane-release events may be associated with great plate-boundary earthquakes with epicenters near the coring site.

  7. Geomorphological context of the basins of Northwestern Peninsular Malaysia

    NASA Astrophysics Data System (ADS)

    Sautter, Benjamin; Pubellier, Manuel; Menier, David

    2014-05-01

    Geomorphological context of the basins of Northwestern Peninsular Malaysia Benjamin Sautter, Manuel Pubellier, David Menier Department of Petroleum Geosciences, Universiti Teknologi PETRONAS CNRS-UMR 8538, Ecole Normale Supérieure, 24, Rue Lhomond, 75231, Paris Cedex 05, France Petroleum basins of Western Malaysia are poorly known and their formation is controlled by the Tertiary stress variations applied on Mesozoic basement structures. Among these are the Paleozoic-Mesozoic Bentong Raub, Inthanon, and Nan suture zones. By the end of Mesozoic times, the arrival of Indian plate was accompanied by strike slip deformation, accommodated by several Major Faults (Sagaing, Three Pagodas, Mae Ping, Red River, Ranong and Klong Marui Faults). Due to changes in the boundary forces, these areas of weakness (faults) were reactivated during the Tertiary, leading to the opening of basins in most of Sundaland. Within this framework, while most of the Sundaland records stretching of the crust and opening of basins (SCS, Malay, Penyu, Natuna, Mergui) during the Cenozoics, Peninsular Malaysia and the Strait of Malacca are considered to be in tectonic quiescence by most of the authors. We present the geomorphology of the Northwestern Malaysia Peninsula with emphasis on the deformations onshore from the Bentong Raub Suture Zone to the Bok Bak Fault, via the Kinta Valley, and offshore from the Port Klang Graben to the North Penang Graben. By analyzing Digital Elevation Model from ASTER and SRTM data, two main directions of fractures in the granitic plutons are highlighted: NW-SE to W-E sigmoidal faults and N-S to NE-SW linear fractures which seem to cross-cut the others. In the field in the area of the Kinta Valley (Western Belt, NW Peninsular Malaysia), granitic bodies show intense fracturation reflecting several stages of deformation. The granites are generally syntectonic and do not cut fully across the Late Paleozoic platform limestone. Two sets of fractures (NW-SE and NE-SW) appear more penetrative in both granitic and limestone units. On most of the studied outcrops, exfoliation fractures are reactivated into normal faults. Deformation is particularly severe at the contact of the granites and the sediments which is underlined by cataclasic quartz dykes and hornfelds. Off-shore, in the Straits of Malacca, nine tertiary half-grabens are present, all oriented in N-S to NE-SW direction with N-S boundary faults on their western margin. We propose a tectonic scenario for the north-western Malaysia Peninsula according to which the northward motion of India induced first right-lateral transpressionnal tectonics at the End of the Mesozoics (Cretaceous early Tertiary). This system is illustrated in the NW-SE trending fractures of the Main Range Batholith and other Triassic plutons within a system bounded and controlled by the Bok Bak Fault, the KL fault zone and the Bentong Raub Suture Zone. Later, a second stage of transtension led to the opening of the en echelon onshore basins in a tear-faults system, and to the opening of half grabens offshore in the Straits of Malacca.

  8. Facies analysis of the lower cycles of the Mesaverde Group (Upper Cretaceous) in northwestern Colorado

    USGS Publications Warehouse

    Kiteley, L.W.

    1983-01-01

    The uppermost 180 m of the Mancos Shale and overlying 390 m of the Iles Formation of the Mesaverde Group in northwestern Colorado were deposited at the west margin of an epicontinental seaway that spanned North America 66-98 million years ago from the circumboreal seaway on the north to the Gulf of Mexico on the south. Sedimentation in the seaway was controlled by uplift in source areas to the west, subsidence in the basin, and eustatic sea level changes. Sedimentation rates were relatively high, averaging about 220m/million years; marine cycles of deposition occurred in northwestern Colorado that correspond to the Claggett, Judith River, and Bearpaw regressions of Montana. The upper Mancos shale and lower Iles Formation can be subdivided into ten facies based on five criteria: (1) Lithology, texture, and thickness relations (geometry); (2) sedimentary structures and contacts; (3) trace and body fossils; (4) paleocurrent data; and (5) adjoining facies (underlying, overlying, and laterally). Each facies has distinct attributes which characterize a specific depositional environment. Environments represented by facies include (A) offshore shoreface transition (prodelta); (B) shallow marine sand bars; (C) destructional delta front; (D) constructional delta front (sheet sands and mouth bars); (E) beach foreshore-shoreface deposits; (F) interdistributary marsh and swamp deposits and fluvial floodplain; (G) distributary channels; (H) crevasse splays; (J) fluvial streams; and (K) tidally influenced distributary channel. Facies analysis of outcrop data shows that transgressions and regressions occurred, some of which are related to major (eustatic) sea level changes and others that reflect only local causes. These events in northwestern Colorado are summarized in following chapters, and an attempt is made to show their relationship to broad regional patterns of sedimentation.

  9. Scaling Tendency of Geothermal Waters Armutlu Peninsula, Northwestern Turkey

    NASA Astrophysics Data System (ADS)

    Ertekin, Can

    2015-04-01

    Prediction of scaling tendencies from geothermal waters is important for taking necessary precautions to prevent or control the scale formation. This study contains scaling tendency of geothermal outlets occurring through Armutlu Peninsula in Northwestern Turkey. The E-W trending region stretches into the Marmara Sea (ca. 117 km E-W by 45 km N-S) and is bounded to the north and the south by North Anatolian Fault Zone (NAFZ). The two branches of NAFZ traversing the peninsula control not only active seismicity but also geothermal discharges of the region. Widespread basement rocks across the peninsula including metamorphic assemblage of granitic and volcanic rocks host geothermal fluids. The two distinctive geothermal discharges (Armutlu and Yalova) take place through lineaments appurtenant to the northern branch of NAFZ. Their discharge temperatures of 65 ° C (Yalova) and 70 ° C (Armutlu) are the highest of the region. According to their water chemical results, scaling tendency were computed by using WATCH for different temperature steps under the assumptions of single-stage adiabatic boiling and equilibrium degassing. To evaluate their scaling tendencies, mean geothermal reservoir temperatures were computed by using chemical geothermometers. Scaling tendencies were plotted for calcite, amorphous silica and quartz minerals for different temperature values including reservoir temperatures. Their scaling behavior reveals that oversaturation with calcite and quartz minerals are rapidly attained for the geothermal fluids (Yalova and Armutlu) at relatively lower temperatures. Regarding amorphous silica, they are completely undersaturated. Besides, Langelier Saturation Index (LSI) and Ryznar Stability Index (RSI) were calculated. Their results depict scale formation due to being positive LSI and less than 6.0 of RSI values.

  10. Northwestern University Information Technology Building Infrastructure Requirements for Communication Facilities

    E-print Network

    Shahriar, Selim

    Northwestern University Information Technology Building Infrastructure Requirements is required for any building. NUITTelecom & Network Services will consult with the FM Project Manager. Intrabuilding communications cabling shall be provided, connecting the building Intermediate Distribution Frame

  11. NORTHWESTERN UNIVERSITY FDTD Computational Electromagnetics Modeling of Microcavity

    E-print Network

    Sheridan, Jennifer

    NORTHWESTERN UNIVERSITY FDTD Computational Electromagnetics Modeling of Microcavity Lasers FDTD Computational Electromagnetics Modeling of Microcavity Lasers and Resonant Optical Structures. Microcavity resonators have electromagnetic wave trans- port phenomena as a critical operating factor

  12. DETAIL OF NORTHWESTERN CORNER, WEST FACADE, SHOWING WINDOW AND LOADING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    DETAIL OF NORTHWESTERN CORNER, WEST FACADE, SHOWING WINDOW AND LOADING DOCK RAMP, LOOKING SOUTH - Eglin Air Force Base, Motor Repair Shop, Northwest of Flager Road, Chisk Lane & southern edge of Weekly Bayou, Valparaiso, Okaloosa County, FL

  13. Avian Community Structure Among Restored Riparian Habitats in Northwestern Mississippi

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Historically, expanding agriculture and stream channelization have degraded riparian zones that serve as vital habitat for avian communities within agroecosystems. Riparian zones and agricultural fields adjacent to incised streams in northwestern Mississippi are impacted by gully erosion initiated b...

  14. Solimoes megashear: Intraplate tectonics in northwestern Brazil

    SciTech Connect

    Caputo, M.V. (Petroleo Brasileiro S.A.-Petrobras, Belem, Para (BRAZIL))

    1991-03-01

    A belt of deformation in the Solimoes basin of northwestern Brazil extends east-northeast from near the Peruvian border for about 1300 km. The belt is characterized by the en echelon arrangement of folds and faults interpreted as the result of right-slip displacements in a transpressive regime. The structures were formed during Late Jurassic time, probably due to collision of South America with allochthonous terranes as the opening of the South Atlantic Ocean began. The Iquitos arch near the western end of the megashear separates the Solimoes basin from Subandean basins. The development of the Iquitos arch is interpreted to be related to orogenic loading along western South America by the Andean mountain belt. In Brazil, folds and faults associated with the Solimoes megashear hold hydrocarbons within Paleozoic strata, and 15 gas and oil fields have so far been discovered.

  15. Zonal management of arsenic contaminated ground water in Northwestern Bangladesh

    Microsoft Academic Search

    Jason Hill; Faisal Hossain; Amvrossios C. Bagtzoglou

    2009-01-01

    This paper used ordinary kriging to spatially map arsenic contamination in shallow aquifers of Northwestern Bangladesh (total area?35,000km2). The Northwestern region was selected because it represents a relatively safer source of large-scale and affordable water supply for the rest of Bangladesh currently faced with extensive arsenic contamination in drinking water (such as the Southern regions). Hence, the work appropriately explored

  16. Numerical study of a downslope windstorm in Northwestern Greece

    Microsoft Academic Search

    I. Koletsis; K. Lagouvardos; V. Kotroni; A. Bartzokas

    2009-01-01

    This paper describes the leeside wind storm of 25–26 March 1998, the most intense wind storm of the last decade in Northwestern Greece. This wind storm produced wind gusts of ?30 m s?1 that resulted in tree uprooting, roof damaging, electric power network disruption and flooding in the lake-side areas of Ioannina city in Northwestern Greece. With the aim to identify

  17. The influence of impaction to the third molar mineralization in northwestern Chinese population.

    PubMed

    Guo, Yu-cheng; Yan, Chun-xia; Lin, Xing-wei; Zhang, Wen-tao; Zhou, Hong; Pan, Feng; Wei, Lai; Tang, Zheng; Liang, Feng; Chen, Teng

    2014-07-01

    Age estimation by third molar mineralization has been developed for a period of time. Recent studies showed that impaction status has an influence on the rate of the third molar mineralization in Europids and male Black African populations. In this regard, the present study was conducted to determine whether the impaction status could delay the chronological process of third molar mineralization in northwestern Chinese population too. A total of 3,512 digital orthopantomograms of 1,255 male and 2,257 female northwestern Chinese subjects aged from 11 to 26 years were assessed based on the formation stages described by Demirjian et al. with two modifications. Mineralization stage and impaction status were determined for all third molars. Statistical measures were calculated at stages C-H in the male and female gender for both impacted and non-impacted third molars. It was ascertained that the mean ages with impacted third molars at stages C-H were 0.02-1.42 years higher in males and 0.04-1.52 years higher in females than those with non-impacted third molars, but statistical differences were only found at stages C, D, and E in males and stages D and E in females. The probabilities of being under 14, 16, or 18 years of age with non-impacted third molars were all higher than those with impacted third molars. The results prove that impacted third molars show significant slower mineralization than non-impacted ones at stages D and E in both males and females of northwestern Chinese population. It is recommended to consider the influence of impaction on the rate of third molar mineralization for dental age estimation. PMID:24532176

  18. Holocene Paleolimnological Records from Thule, Northwestern Greenland

    NASA Astrophysics Data System (ADS)

    Corbett, L.; Osterberg, E. C.; Kelly, M. A.; Axford, Y.

    2012-12-01

    Assessing Holocene climatic and environmental variability around the margin of the Greenland Ice Sheet provides important information against which to compare ice sheet margin fluctuations. Here, we report preliminary results from ongoing research in northwestern Greenland. We present records of physical properties of lake sediments and use these to make inferences about the evolution of the lake and its surroundings over the latter half of the Holocene. We collected two sediment cores, 90 and 72 cm in length, from a small (surface area ~0.3 km2), shallow (maximum depth ~4.5 m) lake at 76°33'40''N 68°26'31''W near Thule Air Base in July 2012. The length of the cores was limited by the length of the core barrel and does not reflect the total thickness of sediment in the lake. The lake is situated within the glacial limit and likely formed subsequent to deglaciation of the region during early Holocene time. No glaciers exist within the lake's catchment today; the primary modern source of sediment is a perennial inflow from the west. We developed a preliminary depth-age model using radiocarbon ages of terrestrial organic macrofossils. Thus far, we have analyzed the sediments for magnetic susceptibility and loss-on-ignition. A radiocarbon age of 6069 ± 90 cal yr BP at the base of the core indicates that the sediments preserve a continuous record of middle to late Holocene conditions. The top of both cores consists of a thick (~12 cm) layer of dark gray unlaminated sediments, while the rest of the material in both cores is lighter brown to olive, finely laminated sediment. The upper layer is characterized by low water content (<25%), low loss-on-ignition (<5%), and high magnetic susceptibility (~150-250 x10-6). Conversely, the laminated sediments beneath have higher water content (~40-50%), higher loss-on-ignition (~5-10%), and much lower magnetic susceptibility (<50 x10-6). We hypothesize that the upper, less organic unit may represent a single event in the lake's recent history. We are refining the depth-age model with more radiocarbon ages, measuring grain size and carbon to nitrogen ratios of the sediments, and evaluating possible linkages between the sediment physical properties and precipitation as recorded by annual accumulation in ice cores in northwestern Greenland and Arctic Canada. This project will provide a foundation for future work in Thule investigating Holocene fluctuations of local ice cap and ice sheet margin positions.

  19. Impact of climate change on the Northwestern Mediterranean Sea pelagic planktonic ecosystem and associated carbon cycle

    E-print Network

    Impact of climate change on the Northwestern Mediterranean Sea pelagic planktonic ecosystem Mediterranean Sea (NWMS) is biologically one of the most productive Mediterranean regions. NWMS pelagic of climate change on the Northwestern Mediterranean Sea pelagic planktonic ecosystem and associated carbon

  20. 76 FR 77779 - Availability of Seats for the Northwestern Hawaiian Islands Coral Reef Ecosystem Reserve Advisory...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-14

    ...Seats for the Northwestern Hawaiian Islands Coral Reef Ecosystem Reserve Advisory Council...seats on the Northwestern Hawaiian Islands Coral Reef Ecosystem Reserve Advisory Council...SUPPLEMENTARY INFORMATION: The NWHI Coral Reef Ecosystem Reserve is a [[Page...

  1. 77 FR 16211 - Availability of Seats for the Northwestern Hawaiian Islands Coral Reef Ecosystem Reserve Advisory...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-20

    ...Seats for the Northwestern Hawaiian Islands Coral Reef Ecosystem Reserve Advisory Council...seats on the Northwestern Hawaiian Islands Coral Reef Ecosystem Reserve Advisory Council...SUPPLEMENTARY INFORMATION: The NWHI Coral Reef Ecosystem Reserve is a marine...

  2. Anomalously deep earthquakes in northwestern Italy

    NASA Astrophysics Data System (ADS)

    Cattaneo, Marco; Augliera, Paolo; Parolai, Stefano; et al.

    It is usually assumed that earthquakes in intraplate regions occur in the upper crust, and northwestern Italy is generally assigned to this kind of normal seismicity. In this work, the depth distribution of the events localized in this area by the Istituto Geofisico Geodetico (IGG) seismic network in the period 1991-1997 is analyzed in detail. In particular, the location capability of the network is discussed, adopting as reference quarry blasts (for the epicentral position) and the locations obtained from a dense temporary network (for the depth estimate). Within the so-obtained error limits, the depth distribution of events show a characteristic pattern: while for most of the area covered by the network the well-located seismicity lies within the first 20 km of depth, in a band following the inner arc of the Western Alps, numerous events have anomalously large focal depths, reaching a maximum of 114 km. These depth determinations cannot be attributed to instabilities of the location procedure: different choices of the propagation models used for the hypocentral determination led to very similar depth values, always significantly larger than the standard values for the surrounding areas. A strong correlation has been found between the 3-dimensional distribution of these foci and the P-wave propagation anomalies obtained from tomographic studies, suggesting a direct link between elastic and rheological properties of lower crust and upper mantle in this area.

  3. Northwestern University Archives 110 Deering Library (847) 491-3354 or (847) 491-3136

    E-print Network

    -Friday, 8:30-5 http://www.library.northwestern.edu/archives Northwestern University in World War I: A Guide German) · George R. Baker, Heroes and Angels: Diary, A Medic Remembers World War I, France and Belgium/2 (These records document Northwestern's contributions during both World Wars, including government use

  4. Tidal currents in the northwestern Adriatic: High-frequency radio observations and

    E-print Network

    Tidal currents in the northwestern Adriatic: High-frequency radio observations and numerical model] A 2-year deployment of high-frequency radio current meters along the Italian coast of the northwestern in the northwestern Adriatic: High-frequency radio observations and numerical model predictions, J. Geophys. Res., 112

  5. The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics

    E-print Network

    Ingólfsson, Ólafur

    U N C O R R EC TED PR O O F The last Scandinavian Ice Sheet in northwestern Russia: ice flow Sheet in northwestern Russia: ice flow patterns and decay dynamics. Boreas, Vol. 35, pp. xxxÁxxx. Oslo) in northwestern Russia took place after a period of periglacial conditions. Till of the last SIS, Bobrovo till

  6. Three-Dimensional Seismic Study of Pluton Emplacement, Offshore Northwestern New Zealand

    E-print Network

    Seamons, Kent E.

    Three-Dimensional Seismic Study of Pluton Emplacement, Offshore Northwestern New Zealand Jason A Emplacement, Offshore Northwestern New Zealand Jason A. Luke Department of Geological Sciences Master of Science Detailed 3D seismic images of a volcano-plutonic complex offshore northwestern New Zealand

  7. 2012 Requesta Refund Page1 NorthwesternUniversity CAESAR/SES Updated:10/25/2012

    E-print Network

    Shahriar, Selim

    ©2012 Requesta Refund Page1 NorthwesternUniversity CAESAR/SES Updated:10/25/2012 SES/CAESAR v. 9 Services > Request a Refund. #12;©2012 Requesta Refund Page2 NorthwesternUniversity CAESAR/SES Updated:10;©2012 Requesta Refund Page3 NorthwesternUniversity CAESAR/SES Updated:10/25/2012 b. To receive your refund via

  8. Middle Proterozoic compressional orogen in northwestern Canada

    NASA Astrophysics Data System (ADS)

    Cook, Frederick A.

    1988-08-01

    Evidence from seismic reflection profiling, drill holes, potential field measurements and regional geology shows that an east verging Proterozoic thin-skinned thrust and fold belt is situated beneath the Interior Platform of northwestern Canada. Balanced cross sections and associated palinspastic reconstructions provide constraints on the extent of the shortening in the thrust belt and suggest that at least 50-90 km of compression can be accounted for. Although the Proterozoic stratigraphy in the subsurface is not well known, the cross sections are constrained essentially by seismic reflection geometry. Shortening occurred on subhorizontal detachment(s) that lie above the autochthonous (Hudsonian?) basement. Seismic reflection data from the area west of the major thin-skinned thrust structures show that the Proterozoic strata there can be traced for up to 100 km and are characterized by broad, open folds with wavelengths of 10 km or more. Uniform potential field anomalies and subhorizontal seismic reflections further indicate that there are no major crustal boundaries (such as sutures) in the area between the thrust belt and the Campbell uplift near Inuvik, Northwest Territories, that were associated with the thrusting. The detachment(s) that carried the folded and thrust faulted allochthons must therefore extend for a considerable distance to the northwest of the thrust belt. New deep crustal seismic reflection data from the Campbell uplift, however, show evidence for crustalpenetrating Proterozoic structures that dip northwestward and that were probably reactivated during late Paleozoic compression and Mesozoic extension. Taken together, the various data thus indicate that the area from Great Bear Lake to the Campbell uplift (about 400 km) is underlain by a mid-Proterozoic decollement above which the compressional deformation took place, and that the deformation extended to the north side of the present Campbell uplift where steeply north dipping structures indicate that the underlying autochthonous basement is characterized by a ramp structure that was probably associated with the southern edge of a Proterozoic basin.

  9. The hydrocarbon potential, thermal maturity, sequence stratigraphic setting and depositional palaeoenvironment of carbonaceous shale and lignite successions of Panandhro, northwestern Kutch Basin, Gujarat, Western India

    Microsoft Academic Search

    Vinay K. Sahay

    2011-01-01

    The objective of the present paper is to provide geochemical and palynological data to characterize lignites and carbonaceous\\u000a shales from Panandhro, northwestern Kutch Basin, Gujarat, Western India, in terms of their hydrocarbon potential, thermal\\u000a maturity, sequence stratigraphic settings and depositional palaeoenvironment. The samples, collected in Panandhro lignite\\u000a mine, belong to Naredi Formation of Late Paleocene-Early Eocene age. The geochemical results

  10. Generalized Geologic evaluation of side looking radar imagery of the Teton Range and Jackson Hole, northwestern Wyoming

    NASA Technical Reports Server (NTRS)

    Love, J. D.

    1970-01-01

    A generalized geologic evaluation of lines, localities, and features of various types that are visible on a series of radar image strips covering the Teton Range and Jackson Hole in northwestern Wyoming, is given. No attempt was made to collate a complete geologic map with the radar image at each locality. Formation names, problems of geologic interpretation, and details of stratigraphy and structure that are not directly pertinent to a study of the imagery are omitted, but reference is made to publications that contain this type of supplementary information.

  11. Effect of the Spanish Conquest on coastal change in Northwestern Peru.

    PubMed

    Belknap, Daniel F; Sandweiss, Daniel H

    2014-06-01

    When Francisco Pizarro and his small band of Spanish conquistadores landed in northern Peru in A.D. 1532 to begin their conquest of the vast Inca Empire, they initiated profound changes in the culture, language, technology, economics, and demography of western South America. They also altered anthropogenically modulated processes of shoreline change that had functioned for millennia. Beginning with the extirpation of local cultures as a result of the Spanish Conquest, and continuing through today, the intersection of demography, economy, and El Niño-driven beach-ridge formation on the Chira beach-ridge plain of Northwestern Peru has changed the nature of coastal evolution in this region. A similar event may have occurred at about 2800 calibrated y B.P. in association with increased El Niño frequency. PMID:24843118

  12. Director, Physician Assistant Program Northwestern University Feinberg School of Medicine

    E-print Network

    Contractor, Anis

    Director, Physician Assistant Program Northwestern University Feinberg School of Medicine of Director, Physician Assistant Program. We seek a dynamic and experienced educator and administrator capable of leading the maturation of this newly-accredited program to a position of preeminence in physician

  13. Charge to the Northwestern University Campus Coalition on Sexual Violence

    E-print Network

    -quarters of sexual assaults on campus involve alcohol or other drug use by the victim and/or the perpetratorCharge to the Northwestern University Campus Coalition on Sexual Violence 2012 Background and Statement of Need Sexual violence ­ including sexual assault, relationship violence, and stalking

  14. Northwestern Argentina as seen from the Apollo 7 spacecraft

    NASA Technical Reports Server (NTRS)

    1968-01-01

    Puna de Atacama area of northwestern Argentina, Provinces of Salta and Catamarca, as seen from the Apollo 7 spacecraft during its 154th revolution of the earth. Photographed from an altitude of 175 nautical miles, at ground elapsed time of 243 hours and 58 minutes.

  15. Striving for Social Status NICOLE IMMORLICA, Northwestern University

    E-print Network

    Fiat, Amos

    University GREG STODDARD, Northwestern University Social comparisons can influence individual decisions and what they consume. We study social comparisons and striving for status in a network context, focusing on how the status considerations and network structure influences individual outcomes and aggregate

  16. BIOMEDICAL RESEARCH BIOMEDICAL RESEARCH BUILDING AT NORTHWESTERN MEDICINE

    E-print Network

    Engman, David M.

    benches for our scientists. Floors will house senior principal investigators, technicians, laboratory Research building and the Robert H. Lurie Medical Research Center. #12;Research Laboratory $1.5 million for wet laboratory space and propel Northwestern Medicine's biomedical enterprise in new and exciting

  17. LOOSELY COLONIAL NESTING BY WESTERN KINGBIRDS IN NORTHWESTERN TEXAS

    Microsoft Academic Search

    CARROLL D. LrFFLEFIELD

    2004-01-01

    The number of Western Kingbirds (Tyrannus verticalis) breeding on a farmstead in northwestern Texas increased from four pairs in 1990 to 13 pairs in 2001. In most cases, nests were located in large planted shade trees at this 0.6-ha farmstead. The earliest resident birds arrived on the mean date of 20 April (n = 12 years), and earliest observed nest

  18. Lateral variations of Pn wave velocity in northwestern Italy

    Microsoft Academic Search

    S. Parolai; D. Spallarossa; C. Eva

    1997-01-01

    The Pn arrival times recorded from seismic networks operating throughout northwestern Italy and surrounding regions were inverted to map the structural variations of the uppermost mantle over the area and to estimate the crustal static delays at each station. By means of careful data selection a quality data set was obtained removing statistical outliers, poorly recorded events, and scantily sampled

  19. Northwestern University Benefits Division Application for Tuition Benefits

    E-print Network

    Shahriar, Selim

    Northwestern University Benefits Division Application for Tuition Benefits In the Music Academy Eligibility: All full time, continuous University employees who have regular, benefits-eligible positions may receive this benefit for non-degree lessons taken in the Music Academy in the School of Music

  20. Northwestern EECS 213 SETI Lab (Beta Test 2)

    E-print Network

    Dinda, Peter A.

    Northwestern EECS 213 SETI Lab (Beta Test 2) Spring 2014 The Search for Extraterrestrial Intelligence (SETI) is a long-standing international effort to try to find alien was that this would hold true for other intelligent civilizations. They may, in fact

  1. New England: 1. Sea scallop -Northwestern Atlantic Coast (2001)

    E-print Network

    2001-01-01

    New England: 1. Sea scallop - Northwestern Atlantic Coast (2001) 2. Silver hake ­ Gulf of Maine - Southern New England / Mid-Atlantic (2012) 10. Yellowtail flounder - Southern New England / Mid National Marine Fisheries Service Office of Sustainable Fisheries New England/ Mid-Atlantic 1. Goosefish

  2. Low-Velocity Impact Testing Horacio Dante Espinosa, Northwestern University

    E-print Network

    Espinosa, Horacio D.

    Low-Velocity Impact Testing Horacio Dante Espinosa, Northwestern University Sia Nemat-Nasser, University of California, San Diego IMPACT TESTS are used to study dynamic deformation and failure modes, or rod-on-rod experiments. Two types of plate-on-plate impact tests have been devel- oped: wave

  3. Northwestern University Career Services Twitter Tutorial What is Twitter?

    E-print Network

    Shull, Kenneth R.

    Northwestern University Career Services Twitter Tutorial What is Twitter? Twitter is an online?" in 140 characters or less ­ also known as a "Tweet." Why Use Twitter? Twitter allows you to follow anyone, and Twitter provides you with a live news feed of Tweets from your followers. Thus, you get constant news

  4. Internship Search Survey 2011 Northwestern University Career Services

    E-print Network

    Shull, Kenneth R.

    professionals around Northwestern's campuses. The information provided can help reinforce our theories this survey have actually secured internships. This is because the experiences of those not successful in their search are just as insightful as those who do find and secure internships. This year's results were very

  5. NORTHWESTERN UNIVERSITY Surface Stabilization Mechanisms in Metal Oxides

    E-print Network

    Shull, Kenneth R.

    NORTHWESTERN UNIVERSITY Surface Stabilization Mechanisms in Metal Oxides A DISSERTATION SUBMITTED Mechanisms in Metal Oxides Andrés E. Becerra Toledo Metal oxide surfaces play a central role in modern SrTiO3(001) surfaces reveals that water plays two major roles in the stabilization of oxide surfaces

  6. Estimating salinity to complement observed temperature: 2.Northwestern Atlantic

    E-print Network

    Estimating salinity to complement observed temperature: 2.Northwestern Atlantic W.C. Thacker a,, L salinity to complement observed temperature: 1. Gulf of Mexico. Journal of Marine Systems. doi:10.1016/j for developing world-wide capability for estimating salinity to complement expendable- bathythermograph (XBT

  7. NORTHWESTERN UNIVERSITY Reconstructions on Strontium Titanate (110) Surfaces

    E-print Network

    Shull, Kenneth R.

    NORTHWESTERN UNIVERSITY Reconstructions on Strontium Titanate (110) Surfaces at Various Annealing August 2011 #12;1 Abstract Reconstructions on Strontium Titanate (110) Surfaces at Various Annealing Conditions Alicia Loon Strontium titanate (SrTiO3) is a perovskite complex metal oxide used in many different

  8. Reproductive biology of Black Anglerfish (Lophius budegassa) in the northwestern

    E-print Network

    Mediterranean Sea. Ovaries and testes presented traits common among fishes of the order Lophi- iformes. Spawning Anglerfish also live in the Mediterranean Sea and Yellow Goosefish (L. litulon) can be found only). In the northwestern Mediterranean Sea, landings of Black Anglerfish and White Anglerfish have accumu- lated to just

  9. BATHYMETRIC ATLAS AND WEBSITE FOR THE NORTHWESTERN HAWAIIAN ISLANDS

    Microsoft Academic Search

    JOYCE E. MILLER; SUSAN VOGT; RONALD HOEKE; SCOTT FERGUSON; BRUCE APPELGATE; JOHN R. SMITH; MICHAEL PARKE

    Until recently the only bathymetric data available in the Northwestern Hawaiian Islands (NWHI) came from single-beam charting surveys that were conducted before World War II. In many cases these data were poorly located, and individual banks could be mischarted by several kilometers. Because detailed bathymetric data are required for a variety of management and research purposes, including designation of boundaries

  10. Hawaiian Monk Seal Pupping Locations in the Northwestern Hawaiian Islands

    Microsoft Academic Search

    WILLIAM G. GILMARTIN

    Most births of the endangered Hawaiian monk seal, Monuchus schuuinslundi, occur in specific beach areas in the Northwestern Hawaiian Islands. Data collected from 1981 to 1988 on the locations of monk seal births and of the first sightings of neonatal pups were summarized to identify preferred birth and nursery habitats. These areas are relatively short lengths of beach at the

  11. The Center for Talent Development at Northwestern University

    ERIC Educational Resources Information Center

    Olszewski-Kubilius, Paula

    2004-01-01

    During the summer and on weekends, it is not unusual to see many children, the youngest holding their parents' hands, walking to classes amongst the beautiful landscaping and old buildings of Northwestern University on Lake Michigan's shores in Evanston, Illinois. The Center for Talent Development (CTD) has been offering services and programs to…

  12. Novel poxvirus in big brown bats, northwestern United States.

    PubMed

    Emerson, Ginny L; Nordhausen, Robert; Garner, Michael M; Huckabee, John R; Johnson, Steven; Wohrle, Ron D; Davidson, Whitni B; Wilkins, Kimberly; Li, Yu; Doty, Jeffrey B; Gallardo-Romero, Nadia F; Metcalfe, Maureen G; Karem, Kevin L; Damon, Inger K; Carroll, Darin S

    2013-06-01

    A wildlife hospital and rehabilitation center in northwestern United States received several big brown bats with necrosuppurative osteomyelitis in multiple joints. Wing and joint tissues were positive by PCR for poxvirus. Thin-section electron microscopy showed poxvirus particles within A-type inclusions. Phylogenetic comparison supports establishment of a new genus of Poxviridae. PMID:23735421

  13. THE INSTITUTES AT NORTHWESTERN MEDICINE INSTITUTE FOR PUBLIC

    E-print Network

    Engman, David M.

    on issues ranging from HIV in Africa to nutrition, obesity, and diabetes in the United States to collaborative ways to respond to a natural disaster (2011 Northwestern University Strategic Plan). The Center treating chronic conditions such as diabetes, hypertension, heart disease and arthritis; and curtailing

  14. Firefuelclimate linkages in the northwestern USA during the Holocene

    E-print Network

    Whitlock, Cathy L.

    in the abundance of sedimentary charcoal found in lake and bog sediments. When analysed with pollen data-resolution charcoal records generally involves the decomposition of charcoal influx into (a) a slowly varying. In this study, 15 high-resolution charcoal records from the northwestern USA and associated pollen data were

  15. 4 Easy stEps to ComputEr sECurity Northwestern University Information Technology | www.it.northwestern.edu

    E-print Network

    Shahriar, Selim

    things you risk losing permanently by not taking control of your computer's security. Take a few minutes's operating systems (Windows or Mac). Northwestern's security software. Internet browsers such as InternetGET 4 Easy stEps to ComputEr sECurity Northwestern University Information Technology | www

  16. Pit Distribution in Titan's Equatorial Region. Kimberly Adams and Donna M. Jurdy, Northwestern University, Department of Earth and Planetary Sciences, Evanston, IL 60208 (kadams@earth.northwestern.edu).

    E-print Network

    Jurdy, Donna M.

    Pit Distribution in Titan's Equatorial Region. Kimberly Adams and Donna M. Jurdy, Northwestern@earth.northwestern.edu). Introduction: Cassini's Radar [1,2] imaged the surface of Titan through its thick atmosphere. Using of the T8 im- age, between two mountains [4]. The pits range in size up to 2 km in diameter. Pits on Titan

  17. The Driskill Graduate Program Northwestern University

    E-print Network

    Engman, David M.

    by Burkholderia pseudomallei Jeffery F. Miller, Ph.D. is the M. Philip Davis Chair in Microbiology and Immunology cycles of Bordetella pertussis, which causes whooping cough, and Burkholderia pseudomallei, which causes and Burkholderia, iv) biofilm formation and the hyper-colonization phenotype of Staphylococcus epidermiditis, and v

  18. Hydrogeologic factors affecting cavern morphology within rocks of Mississippian age in northwestern Arkansas

    SciTech Connect

    Fanning, B.J. (Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Geology); Brahana, J.V. (Univ. of Arkansas , Fayetteville, AR (United States). Geological Survey)

    1993-02-01

    Cavern development within rocks of Mississippian age in northwestern Arkansas is associated with two Pleistocene erosional features, the Boston Mountains Plateau and the Springfield Plateau. Each plateau is characterized by a distinct stratigraphic sequence with unique lithologies. Cavern morphology (both cross-sectional and planimetric) in each plateau is the result of the complex interaction of numerous hydrogeologic factors. Four of the most dominant factors which affect cavern morphology appear to be: (1) composition and continuity of the confining units; (2) percentage of noncarbonate components in rocks of the cavern-forming interval; (3) nature and distribution of ground-water recharge to the cavern-forming interval; and (4) nature and distribution of fractures within the cavern-forming interval. Network maze patterns typically develop in the Pitkin Limestone, the formation in which most caverns form beneath the Boston Mountains Plateau. The Pitkin, a bioclastic limestone, is confined above by siltstones of the Cane Hill member of the Hale Formation and below by shales of the Fayetteville Formation. The maze pattern indicates that these caverns probably were formed by dissolution of the rock matrix by diffuse recharge moving vertically through leaky confining units. Single rooms are the dominant cavern morphology in the chert-dominated Boone Formation of the Springfield Plateau. Where the concentration of chert is greater than 50 percent, the Boone lacks structural integrity and fails to develop well-integrated conduit networks. Point recharge features in outcrop areas of the Boone Formation are not visible in most of the Springfield Plateau because the insoluble residuum masks the upper bedrock surface. Where the Boone Formation is less than 7 meters thick, surface karst features are more prevalent.

  19. 2012 1098-T Page1 NorthwesternUniversity CAESAR/SES Updated:10/26/2012

    E-print Network

    Shahriar, Selim

    ©2012 1098-T Page1 NorthwesternUniversity CAESAR/SES Updated:10/26/2012 SES/CAESAR v. 9.0 Student and navigate to Student Financial Services > 1098-T. #12;©2012 1098-T Page2 NorthwesternUniversity CAESAR/SES-T Page3 NorthwesternUniversity CAESAR/SES Updated:10/26/2012 a. To view the information letter

  20. Heat flow from eastern Panama and northwestern Colombia

    USGS Publications Warehouse

    Sass, J.H.; Munroe, R.J.; Moses, T.H., Jr.

    1974-01-01

    Heat flows were determined at 12 sites in four distinct areas between longitude 77?? and 80??W in eastern Panama and northwestern Colombia. Evidently, most of the region is underlain by mafic oceanic crust so that the crustal radiogenic component of heat flow is very small (??? 0.1 ??cal cm-2 sec-1). Low heat-flow values (??? 0.7 ??cal cm-2 sec-1) in northwestern Colombia may reflect thermal transients associated with shallow subduction. The normal values (??? 1) at about 78??W are consistent with the mean heat flow from the western Caribbean and the Gulf of Mexico. At 80??W, a fairly high value of 1.8 may define the easterly limit of thermal transients due to Cenozoic volcanic activity in Central America. ?? 1974.

  1. Abrupt changes of intermediate-water oxygen in the northwestern Pacific during the last 27 kyr

    NASA Astrophysics Data System (ADS)

    Ishizaki, Yui; Ohkushi, Ken'ichi; Ito, Takashi; Kawahata, Hodaka

    2009-04-01

    An oxygen minimum zone (OMZ) currently exists at intermediate water depths on the northern Japanese margin in the northwestern Pacific. The OMZ results largely from a combination of high surface-water productivity and poor ventilation of intermediate waters. We investigated the late Quaternary history (last 27 kyr) of the intensity of this OMZ using changes in benthic foraminiferal carbon isotopes and assemblages in a sediment core taken on the continental slope off Shimokita Peninsula, northern Japan, at a water depth of 975 m. The core was located well within the region of the present-day OMZ and high surface-water productivity. The benthic foraminiferal ?13C values, which indicate millennial-scale fluctuations of nutrient contents at the sediment-water interface, were 0.48‰ lower during the last glacial maximum (LGM) than during the late Holocene. These results do not indicate the formation of glacial intermediate waters of subarctic Pacific origin, but rather the large contribution of high-nutrient water masses such as the Antarctic Intermediate Water, implying that the regional circulation pattern during the LGM was similar to that of modern times. Benthic foraminiferal assemblages underwent major changes in response to changes in dissolved oxygen concentrations in ocean floor sediments. The lowest oxygen and highest nutrient conditions, marked by dysoxic taxa and negative values of benthic foraminiferal ?13C, occurred during the Bølling/Allerød (B/A) and Pre-Boreal warming events. Dysoxic conditions in this region during these intervals were possibly caused by high surface-water productivity at times of reduced intermediate-water ventilation in the northwestern Pacific. The benthic assemblages show dysoxic events on approx. 100- to 200-year cycles during the B/A, reflecting centennial-scale productivity changes related to freshwater cycles and surface-water circulation in the North Pacific.

  2. DEPARTMENT OF PHYSICAL THERAPY & HUMAN MOVEMENT SCIENCES FEINBERG SCHOOL OF MEDICINE, NORTHWESTERN UNIVERSITY

    E-print Network

    Chisholm, Rex L.

    DEPARTMENT OF PHYSICAL THERAPY & HUMAN MOVEMENT SCIENCES FEINBERG SCHOOL OF MEDICINE, NORTHWESTERN, teaching, administration, research, quality improvement, program development, etc.) 2. Given your knowledge

  3. 76 FR 77214 - Hawaii Crustacean Fisheries; 2012 Northwestern Hawaiian Islands Lobster Harvest Guideline

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-12

    ...DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration RIN 0648-XA838 Hawaii Crustacean Fisheries; 2012 Northwestern Hawaiian Islands Lobster Harvest Guideline AGENCY: National Marine Fisheries...

  4. Duration of Last Interglacial Conditions in Northwestern Greece

    NASA Astrophysics Data System (ADS)

    Tzedakis, Polychronis C.; Frogley, Michael R.; Heaton, Timothy H. E.

    2002-07-01

    A new astronomical calibration method for long pollen records from southern Europe is applied to the last interglacial interval of the Ioannina sequence, northwestern Greece. This shows that the last interglacial in this region, as defined by the presence of forest communities, lasted ca. 15,500 yr, from 127,300 to 111,800 yr B.P. Interglacial conditions developed within marine isotope substage (MIS) 5e and persisted into MIS 5d, lagging changes in global ice volume.

  5. Northwestern University Facility for Clean Catalytic Process Research

    SciTech Connect

    Marks, Tobin Jay [Northwestern University

    2013-05-08

    Northwestern University with DOE support created a Facility for Clean Catalytic Process Research. This facility is designed to further strengthen our already strong catalysis research capabilities and thus to address these National challenges. Thus, state-of-the art instrumentation and experimentation facility was commissioned to add far greater breadth, depth, and throughput to our ability to invent, test, and understand catalysts and catalytic processes, hence to improve them via knowledge-based design and evaluation approaches.

  6. Joseph Fourier University Grenoble Northwestern Polytechnical University Xi'an

    E-print Network

    Paris-Sud XI, Université de

    .1.3 Anisotropic Nd-Fe-B powders 10 1.1.4 Recycle Nd-Fe-B magnets by HD process 10 1.2 The fundamental for hydrogen of the Northwestern Polytechnical University Presented by LUO Jianjun Development of anisotropic Nd-Fe-B powders from-ferrous Metal Research, Xi'an, China in the framework of the French-Chinese International Associated Laboratory

  7. Spatial relationships between swift foxes and coyotes in northwestern Texas

    Microsoft Academic Search

    Jan F. Kamler; Warren B. Ballard; Rickey L. Gilliland; Kevin Mote

    2003-01-01

    Abstract: Interspecific competition,among,canids can result in mortalities and spatial displacement,of smaller canids by larger canids. To investigate mortalities and spatial relationships of swift foxes ( Vulpes velox) and coyotes (Canis latrans), we captured and radio-tracked both species at Rita Blanca National Grasslands in northwestern Texas. At least 89% of swift fox mortalities were caused by coyotes, resulting in a relatively

  8. Dynamics, Patterns and Causes of Fires in Northwestern Amazonia

    PubMed Central

    Armenteras, Dolors; Retana, Javier

    2012-01-01

    According to recent studies, two widespread droughts occurred in the Amazon basin, one during 2005 and one during 2010. The drought increased the prevalence of climate-driven fires over most of the basin. Given the importance of human-atmosphere-vegetation interactions in tropical rainforests, these events have generated concerns over the vulnerability of this area to climate change. This paper focuses on one of the wettest areas of the basin, Northwestern Amazonia, where the interactions between the climate and fires are much weaker and where little is known about the anthropogenic drivers of fires. We have assessed the response of fires to climate over a ten-year period, and analysed the socio-economic and demographic determinants of fire occurrence. The patterns of fires and climate and their linkages in Northwestern Amazonia differ from the enhanced fire response to climate variation observed in the rest of Amazonia. The highest number of recorded fires in Northwestern Amazonia occurred in 2004 and 2007, and this did not coincide with the periods of extreme drought experienced in Amazonia in 2005 and 2010. Rather, during those years, Northwestern Amazonia experienced a relatively small numbers of fire hotspots. We have shown that fire occurrence correlated well with deforestation and was determined by anthropogenic drivers, mainly small-scale agriculture, cattle ranching (i.e., pastures) and active agricultural frontiers (including illegal crops). Thus, the particular climatic conditions for air convergence and rainfall created by proximity to the Andes, coupled with the presence of one of the most active colonisation fronts in the region, make this region differently affected by the general drought-induced fire patterns experienced by the rest of the Amazon. Moreover, the results suggest that, even in this wet region, humans are able to modify the frequency of fires and impact these historically well preserved forests. PMID:22523580

  9. 41. SOUTHEAST ACROSS WOODWORKING SHOP AREA IN NORTHWESTERN QUADRANT OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    41. SOUTHEAST ACROSS WOODWORKING SHOP AREA IN NORTHWESTERN QUADRANT OF FACTORY SHOWING ON LEFT CIRCA 1900 CROSS-CUTOFF CIRCULAR SAW AND ON RIGHT CIRCA 1900 TABLE SAW. BEHIND THE CROSS-CUTOFF SAW IS A CIRCA 1900 SNAG GRINDER. IN THE CENTER BACKGROUND IS THE CIRCA 1900 MICHIGAN MACHINERY MFG. CO. PUNCH PRESS. - Kregel Windmill Company Factory, 1416 Central Avenue, Nebraska City, Otoe County, NE

  10. Trade in Palm Products in North-Western South America

    Microsoft Academic Search

    Grischa Brokamp; Natalia Valderrama; Moritz Mittelbach; Anders S. Barfod; Maximilian Weigend

    More than 200 scientific publications and Internet sources dealing with trade in palm products in north-western South America\\u000a are reviewed. We focus on value chains, trade volumes, prices, and recent developments for some of the most important raw\\u000a materials derived from native palms. Trade in palm products takes place at local, regional, national, and international levels.\\u000a For local communities and

  11. Winter Prey Selection of Canada Lynx in Northwestern Montana

    Microsoft Academic Search

    JOHN R. SQUIRES; LEONARD F. RUGGIERO

    2007-01-01

    ABSTRACT The roles that diet and prey abundance,play in habitat selection of Canada,lynx (Lynx canadensis) in the contiguous,United States is poorly understood. From 1998–2002, we back-tracked radiocollared lynx (6 F, 9 M) for a distance of 582 km and we located 86 kills in northwestern Montana, USA. Lynx preyed on 7 species that included blue grouse (Dendragapus obscurus), spruce grouse

  12. Biology of Coral Reefs in the Northwestern Hawaiian Islands

    Microsoft Academic Search

    Richard W. Grigg; Jeffrey Polovina; Alan M. Friedlander; Steven O. Rohmann

    The Northwestern Hawaiian Islands (NWHI ) represent the northern three-quarters of the Hawaiian Archipelago. This part of\\u000a the Hawaiian chain stretches across 2,000 km of the North Pacific between 23 and 29 degrees north latitude and consists of\\u000a nine major islets, coral islands and\\/or atolls. Numerous reefs, submerged banks and seamounts also exist between and around\\u000a the main islands. Together

  13. Dynamics, patterns and causes of fires in Northwestern Amazonia.

    PubMed

    Armenteras, Dolors; Retana, Javier

    2012-01-01

    According to recent studies, two widespread droughts occurred in the Amazon basin, one during 2005 and one during 2010. The drought increased the prevalence of climate-driven fires over most of the basin. Given the importance of human-atmosphere-vegetation interactions in tropical rainforests, these events have generated concerns over the vulnerability of this area to climate change. This paper focuses on one of the wettest areas of the basin, Northwestern Amazonia, where the interactions between the climate and fires are much weaker and where little is known about the anthropogenic drivers of fires. We have assessed the response of fires to climate over a ten-year period, and analysed the socio-economic and demographic determinants of fire occurrence. The patterns of fires and climate and their linkages in Northwestern Amazonia differ from the enhanced fire response to climate variation observed in the rest of Amazonia. The highest number of recorded fires in Northwestern Amazonia occurred in 2004 and 2007, and this did not coincide with the periods of extreme drought experienced in Amazonia in 2005 and 2010. Rather, during those years, Northwestern Amazonia experienced a relatively small numbers of fire hotspots. We have shown that fire occurrence correlated well with deforestation and was determined by anthropogenic drivers, mainly small-scale agriculture, cattle ranching (i.e., pastures) and active agricultural frontiers (including illegal crops). Thus, the particular climatic conditions for air convergence and rainfall created by proximity to the Andes, coupled with the presence of one of the most active colonisation fronts in the region, make this region differently affected by the general drought-induced fire patterns experienced by the rest of the Amazon. Moreover, the results suggest that, even in this wet region, humans are able to modify the frequency of fires and impact these historically well preserved forests. PMID:22523580

  14. Sedimentation and shale tectonics of the northwestern Niger Delta front

    Microsoft Academic Search

    Harvey A. Cohen; Ken McClay

    1996-01-01

    The modern-day slope and outer shelf of the Niger Delta are characterized by fault-bounded sedimentary depocentres and intervening shale structures, some of which are diapiric. Using two-dimensional seismic reflection data and stratigraphic information from five wells, the Neogene history of a 70 × 30 km portion of the northwestern Niger Delta shelf and slope has been examined. The shale structures

  15. A southwest monsoon hydrographic climatology for the Northwestern Arabian Sea

    NASA Technical Reports Server (NTRS)

    Brock, John C.; Mcclain, Charles R.; Hay, W. W.

    1992-01-01

    This paper provides a detailed hydrographic climatology for the shallow northwestern Arabian Sea prior to and during the southwest monsoon, presented as multiple-year composite vertical hydrographic sections based on National Oceanographic Data Center historical ocean station data. Temperature and salinity measurements are used to infer the water masses present in the upper 500 m. The hydrographic evolution depicted on bimonthly sections is inferred to result from wind-driven physical processes. In the northwestern Arabian Sea the water mass in the upper 50 m is the Arabian Sea Surface Water. Waters from 50 to 500 m are formed by mixing of Arabian Sea Surface Water with Antarctic and Indonesian intermediate waters. The inflow of Persian Gulf Water does not significantly influence the hydrography of the northwestern Arabian Sea along the Omani coast. Nitrate has a high inverse correlation with temperature and oxygen in the premonsoon thermocline in the depth interval 50-150 m. During the southwest monsoon, coastal upwelling off Oman and adjacent offshore upward Ekman pumping alter the shallow hydrography.

  16. Geology and geochemistry of the clastic sequences from Northwestern Panay (Philippines): Implications for provenance and geotectonic setting

    NASA Astrophysics Data System (ADS)

    Gabo, Jillian Aira S.; Dimalanta, Carla B.; Asio, Mary Grace S.; Queaño, Karlo L.; Yumul, Graciano P., Jr.; Imai, Akira

    2009-12-01

    Whole-rock geochemical analysis of samples from the clastic sequences in Northwestern Panay revealed different compositional ranges for the Buruanga Peninsula and Antique Range. The results provide additional evidence that Northwestern Panay consists of two distinct terranes as a result of the arc-continent collision between the Palawan Microcontinental Block and the Philippine Mobile Belt. Major element compositions of clastic rocks from the Buruanga Peninsula (Saboncogon Formation) revealed that they belong to a continental margin tectonic setting whereas the Antique Range sedimentary rocks (Lagdo Formation) show an affinity to an oceanic island arc setting. The Fragante Formation of the Antique Range shows some similarities in tectonic setting and provenance with Buruanga Peninsula clastic rocks, which suggests a Buruanga Peninsula sediment contribution during its time of formation. Furthermore, provenance analyses from combined major and trace element data indicate a more silicic source for the Buruanga Peninsula clastics and a more mafic derivation for the sedimentary rocks of the Antique Range. These findings are consistent with previous studies suggesting that the Buruanga Peninsula forms part of the Palawan Microcontinental Block and the Antique Range belongs to the Philippine Mobile Belt. The Palawan Microcontinental Block is believed to be a drifted continental fragment from the Mesozoic East Asian accretionary complex in the southern part of the Eurasian mainland, which represents the continental margin setting and felsic source of the Buruanga Peninsula clastic rocks. Meanwhile, the oceanic island setting and mafic source of the Antique Range clastic rocks represent the volcanic rocks of the Philippine Mobile Belt that were formed as a result of the subduction of the leading oceanic edge of the Palawan Microcontinental Block.

  17. Late paleozoic tectonic amalgamation of northwestern China. Sedimentary record of the northern Tarim, northwestern Turpan, and southern Junggar basins

    SciTech Connect

    Carroll, A.R. [Exxon Production Research Co., Houston, TX (United States); Graham, S.A.; Hendrix, M.S.; Ying, D.; Zhou, D. [Stanford Univ., CA (United States)

    1995-05-01

    This study focuses on areas adjacent to the Tian Shan (shan is Chinese for mountains) in Xinjiang Uygur Autonomous Region, northwestern China, and provides new field data on Carboniferous and Permian outcrop exposures of sedimentary rocks of the southern Junggar, northwestern Turpan, and northern Tarim basins that bear directly on the history of late Paleozoic tectonic amalgamation. We present here a multifaceted sedimentary basin analysis, including sedimentary facies, paleocurrent, and sandstone provenance analyses, and reconstructions of late Paleozoic basin subsidence. These data provide a unique record not only of the basins themselves, but also of the evolution of the adjacent orogenic belts. This study is based on fieldwork during the summers of 1987, 1988, 1991, and 1992 by workers from Stanford University, the Chinese Academy of Geological Sciences, and the Xinjiang Bureau of Geology and Mineral Resources. Although reconnaissance in nature, the data presented here provide a basis for evaluating alternative hypotheses for the evolution of northwestern China and provide a starting point for more comprehensive future studies. 72 refs., 18 figs., 1 tab.

  18. "Northwestern brings together some of the most talented students in the nation, and that makes every day a

    E-print Network

    people."-- a music major Northwestern University 2002 Financial Report #12;BB Message from the President tutoring children in the local schools, will find encouragement at Northwestern to feed every dimension

  19. Argonne is a partner in the Argonne-Northwestern Solar Energy Research Center led by Northwestern University. Argonne is a partner in the Center for Emergent Superconductivity led by Brookhaven National Laboratory.

    E-print Network

    Kemner, Ken

    Argonne is a partner in the Argonne-Northwestern Solar Energy Research Center led by Northwestern University. Argonne is a partner in the Center for Emergent Superconductivity led by Brookhaven National Conductivity (CES) W. Kwok (MSD) Argonne-Northwestern Solar Energy Research (ANSER) M. Pellin (MSD) #12;

  20. Regional correlation of deposition sequences in the southern Mesozoic marine province, northwestern Nevada

    SciTech Connect

    Satterfield, J.I.; Oldow, J.S. (Rice Univ., Houston, TX (United States). Dept. of Geology and Geophysics)

    1993-04-01

    Strata of the Mesozoic marine province of a northwestern Nevada, deposited in subaerial to deep marine environment in a backarc basin, underwent severe deformation during the late Mesozoic. Restoration of stratigraphic relations among constituent volcanic, volcanogenic, carbonate, and continentally-derived siliciclastic rocks has been hampered by sparse biostratigraphic age control. Regional correlation of coeval facies is made possible by coupling depositional sequences with biostratigraphic control in the southwestern Gabbs Valley Range, the southern Shoshone Mountains, and the southern Clan Alpine Mountains, which serve as reference sections for Late Triassic and Early Jurassic ammonite zonation of western North America. Differentiation between regionally significant sequence boundaries and those of limited areal extent is possible only by linking the biostratigraphy and physical stratigraphic relations, such as abrupt vertical transitions in lithology corresponding to large facies changes. Physical stratigraphic relations alone are not adequate for correlation ad indicated by the diachronous initiation of Early to Middle( ) Jurassic deposition in half-graben basins (Dunlap Formation) which locally cloaks eustatically( ) controlled depositional sequences. Within these limitations, three regionally extensive sequences are recognized in the reference sections and have lower boundaries at the base of Upper Triassic shallow marine to deltaic carbonate-clastic rocks (Luning Formation) and at the base and within subtidal to offshore-marine carbonate and clastic rocks (Triassic and Jurassic Volcano Peak Group).

  1. Early Weichselian palaeoenvironments reconstructed from a mega-scale thrust-fault complex, Kanin Peninsula, northwestern Russia

    E-print Network

    Ingólfsson, Ólafur

    -scale thrust-fault complex, Kanin Peninsula, northwestern Russia EILIV LARSEN, KURT H. KJÆR, MARIA JENSEN, IGOR a mega-scale thrust-fault complex, Kanin Peninsula, northwestern Russia. Boreas, Vol. 35, pp. 00Á00. Oslo and sorted sediments is superbly exposed on the north coast of the Kanin Peninsula, northwestern Russia

  2. 2012 Tuition &HousingDeposits Page1 NorthwesternUniversity CAESAR/SES Updated:03/13/2013

    E-print Network

    Shahriar, Selim

    ©2012 Tuition &HousingDeposits Page1 NorthwesternUniversity CAESAR/SES Updated:03/13/2013 SES (Tuition/Housing). #12;©2012 Tuition &HousingDeposits Page2 NorthwesternUniversity CAESAR/SES Updated:03Deposits Page3 NorthwesternUniversity CAESAR/SES Updated:03/13/2013 Step 4 Select the appropriate Payment method

  3. Stratigraphic Analysis of Upper Cretaceous Rocks in the Mahajanga Basin, Northwestern Madagascar: Implications for Ancient and Modern Faunas.

    PubMed

    Rogers; Hartman; Krause

    2000-05-01

    Upper Cretaceous strata of the Mahajanga Basin, northwestern Madagascar, yield some of the most significant and exquisitely preserved vertebrate fossils known from Gondwana. The sedimentology of these strata and their stratigraphic relations have been the focus of renewed geological investigations during the course of five expeditions since 1993. We here designate stratotypes and formalize the terrestrial Maevarano Formation, with three new members (Masorobe, Anembalemba, Miadana), and the overlying marine Berivotra Formation. The Maevarano Formation accumulated on a broad, semiarid alluvial plain bounded to the southeast by crystalline highlands and to the northwest by the Mozambique Channel. The Berivotra Formation was deposited in an open marine setting that evolved from a clastic- to a carbonate-dominated shelf, resulting in deposition of the overlying Betsiboka limestone of Danian age. New stratigraphic data clearly indicate that the Maevarano Formation correlates, at least in part, with the Maastrichtian Berivotra Formation, and this in turn indicates that the most fossiliferous portions of the Maevarano Formation are Maastrichtian in age, rather than Campanian as previously reported. This revised age for the Maevarano vertebrate assemblage indicates that it is approximately contemporaneous with the vertebrate fauna recovered from the Deccan basalt volcano-sedimentary sequence of India. The comparable age of these two faunas is significant because the faunas appear to be more similar to one another than either is to those from any other major Gondwanan landmass. The revised age of the Maevarano Formation, when considered in the light of our recent fossil discoveries, further indicates that the ancestral stocks of Madagascar's overwhelmingly endemic modern vertebrate fauna arrived on the island in post-Mesozoic times. The basal stocks of the modern vertebrate fauna are conspicuously absent in the Maevarano Formation. Finally, the revised age of the Maevarano Formation serves to expand our global perspective on the K/T event by clarifying the age of a diverse, and arguably the best preserved, sample of Gondwanan vertebrates from the terminal Cretaceous. PMID:10769157

  4. Observing mixed layer depth, nitrate and chlorophyll concentrations in the northwestern Mediterranean

    E-print Network

    Claustre, Hervé

    Observing mixed layer depth, nitrate and chlorophyll concentrations in the northwestern Paris 06)-CNRS-IRD-MNHN, LOCEAN, Paris, France Abstract Two profiling floats, equipped with nitrate concentration sensors were deployed in the northwestern Mediterranean from summer 2012 to summer 2013. Satellite

  5. Debris Flow Triggered by Rapid Snowmelt: A Case Study in The Glei .arhjalli Area, Northwestern Iceland

    Microsoft Academic Search

    Armelle Decaulne; Porsteinn SAEmundsson; Oddur Petursson

    2005-01-01

    Decaulne, A., Sæmundsson, ° . and Pétursson, O., 2005: Debris flows triggered by rapid snowmelt: a case study in the Glei ? arh- jalli area, northwestern Iceland. Geogr. Ann ., 87 A(4): 487-500. ABSTRACT. Debris flows in the Glei ? arhjalli area in northwestern Iceland occurred after a sudden and intensive snowmelt period during 10-12 June, 1999. The area, in

  6. Five species of sea turtles in the northwestern Atlantic Ocean are

    E-print Network

    671 Five species of sea turtles in the northwestern Atlantic Ocean are protected under the U in the sea scallop (Placopecten magellanicus) dredge fishery in two areas of the northwestern Atlantic Ocean Service (NMFS) opened two areas in the northwest- ern Atlantic Ocean that had been previously closed

  7. NORTHWESTERN UNIVERSITY System Design and Verification of the Precession Electron Diffraction Technique

    E-print Network

    Shull, Kenneth R.

    NORTHWESTERN UNIVERSITY System Design and Verification of the Precession Electron Diffraction, ILLINOIS First published on the WWW 01, August 2005 Build 05.12.07. PDF available for download at: http://www.numis.northwestern.edu/Research/Current/precession.shtml #12;Appendices 123 #12;APPENDIX A Electronics Background This section contains a review of some basic

  8. Mantle source provinces beneath the Northwestern USA delimited by helium isotopes in young basalts

    E-print Network

    Graham, David W.

    Mantle source provinces beneath the Northwestern USA delimited by helium isotopes in young basalts results for basalts from the northwestern United States. The new 3 He/ 4 He results for olivine phenocrysts in basalts from the eastern Snake River Plain (SRP), the Owyhee Plateau (OP) and the Oregon High

  9. SEASONAL AND SPATIAL CHANGES IN FLEA COMMUNITIES OF BLACK-TAILED PRAIRIE DOGS OF NORTHWESTERN MEXICO

    E-print Network

    Nacional Autónoma de México, Universidad

    of mortality in prairie dog populations. In Mexico, plague has never been reported in prairie dogs despiteSEASONAL AND SPATIAL CHANGES IN FLEA COMMUNITIES OF BLACK-TAILED PRAIRIE DOGS OF NORTHWESTERN were collected from prairie dogs trapped in 7 plots (160 x 160 m) in 3 colonies of northwestern Mexico

  10. Northwestern University Archives Evanston, Illinois Myrtle Whitney (1869-?) Papers, 1890-1892

    E-print Network

    Northwestern University Archives Evanston, Illinois Myrtle Whitney (1869- ?) Papers, 1890/31/25, Northwestern University Archives Biography Myrtle Viola Whitney was born in Oakfield, Wisconsin, on December 12 is known about her. Description of the Series The Myrtle Whitney Papers fill one half- width box and date

  11. Paleoseismicity of the Southern End of the Cascadia Subduction Zone, Northwestern California

    E-print Network

    Keller, Ed

    ) and Atwater (1987), the earthquake and tsunami threat along the Cascadia subduction zone (CSZ) was classified Paleoseismicity of the Southern End of the Cascadia Subduction Zone, Northwestern California Abstract The southern end of the Cascadia subduction zone (CSZ) in northwestern California poses a high

  12. 1 What induced the exceptional 2005 convection event 2 in the northwestern Mediterranean basin?

    E-print Network

    Paris-Sud XI, Université de

    1961­2006 reproduces correctly the 16 longterm evolution of the Mediterranean Sea circulation, the EMT1 What induced the exceptional 2005 convection event 2 in the northwestern Mediterranean basin? 3 2010. 6 [1] Opensea convection occurring in the northwestern Mediterranean basin (NWMED) is 7

  13. Charles Deering McCormick Library of Special Collections Northwestern University Library

    E-print Network

    Charles Deering McCormick Library of Special Collections Northwestern University Library Dublin in the Charles Deering McCormick Library of Special Collections consist of 384 boxes, 7 large art folders Deering McCormick Library of Special Collections Northwestern University Library Dublin Gate Theatre

  14. Charles Deering McCormick Library of Special Collections Northwestern University Library Evanston, Illinois

    E-print Network

    Charles Deering McCormick Library of Special Collections Northwestern University Library · Evanston 1996; revised and encoded in March 2008. #12;Charles Deering McCormick Library of Special Collections Northwestern University Library · Evanston, Illinois Aleta Styers Papers Series LXVI 1 box #12;Charles Deering

  15. Northwestern University Chicago Campus Martin Luther King Commemoration Art Contest Entry Form

    E-print Network

    Chisholm, Rex L.

    Northwestern University Chicago Campus Martin Luther King Commemoration Art Contest Entry Form 2013 Campus Martin Luther King Commemoration Art Contest. I understand that Northwestern University retains Martin Luther King Commemoration Art Contest Rules and Regulations 1. All entries must be submitted

  16. The Northwestern Africana Project: An Experiment in Decentralized Bibliographic and Authority Control.

    ERIC Educational Resources Information Center

    Hill, Janet Swan

    1981-01-01

    An investigation of the feasibility of using a computer-assisted decentralized bibliographic control system to build a comprehensive, consistent national database for use in a national library network used the Northwestern On-line Total Integrated System to establish a center for African materials at Northwestern University. Eleven references are…

  17. Evidence of uranium biomineralization in sandstone-hosted roll-front uranium deposits, northwestern China

    E-print Network

    Fayek, Mostafa

    Evidence of uranium biomineralization in sandstone-hosted roll-front uranium deposits, northwestern Available online 25 January 2005 Abstract We show evidence that the primary uranium minerals, uraninite-front uranium deposits, Xinjiang, northwestern China were biogenically precipitated and psuedomorphically

  18. The Mont Terri rock laboratory, a new international research project in a Mesozoic shale formation, in Switzerland

    Microsoft Academic Search

    M. Thury; P. Bossart

    1999-01-01

    In many countries, argillaceous formations are being considered as potential host rocks for repositories of radioactive waste. Therefore, in 1995 several organisations decided to start an international research project in the reconnaissance gallery of the Mont Terri motorway tunnel, in north-western Switzerland, in a Mesozoic shale formation, the Opalinus Clay (Aalenian).This project is under the patronage of the Swiss National

  19. Geogenic sources of local arsenic enrichment in groundwater from northwestern Thuringia, Germany

    NASA Astrophysics Data System (ADS)

    Abratis, Michael; Viereck, Lothar

    2014-05-01

    Aqueous fluids migrating in the Earth's crust interact with the host rocks and partially take up their geochemical signatures. Mineralization and sometimes geogenic contamination of the groundwater may be the consequence: The aquifer systems of the Lower Triassic Buntsandstein Formation, an important source of drinking water in north-western Thuringia, and the Rotliegend Formation are locally affected by elevated arsenic concentrations. Data from water wells locally show arsenic concentrations above the limit value for drinking water (10 ?g/L). The regional distribution as well as lack of secondary vein mineralizations or anthropogenic sources within this area point to a geogenic stratibound source of arsenic. The average concentration of the toxic, carcinogenic trace element arsenic in rocks of Phanerozoic rocks in Germany range from 5 to 12 ?g/g for different lithologies, being generally higher in Variscan rocks. However, it can be several times enriched in certain sedimentary lithologies such as pelites and even more so in coal beds. In our present study we investigate all sequences of the Buntsandstein and Rotliegend Formation with their different lithologies in order to identify the relevant carriers of arsenic. Geochemical analyses on samples from selected drill cores and outcrops show arsenic of >50 ?g/g especially in carbonaceous sediment sections as well as in primarily gray-green lacustrine clay stones. Elevated arsenic concentrations seem to be related to lithofacies of lacustrine origin in the Buntsandstein and carbonaceous sediment sections in the Rotliegend. Aim of the current study is now to identify the appropriate synsedimentary mineral phases that incorporate arsenic and to identify the processes and conditions under which arsenic is mobilized from these phases and transferred into the groundwater.

  20. Great Earthquakes and Tsunamis of the Northwestern Aceh Coast, Sumatra

    NASA Astrophysics Data System (ADS)

    Kelsey, H. M.; Horton, B. P.; Rubin, C. M.; Daly, P.; Grand Pre, C.; Hawkes, A.; Daryono, M.; Ismail, N.

    2011-12-01

    The 2004 Andaman Aceh earthquake occasioned coseismic coastal subsidence in the range of 0.5 to 2.0 m on the northwestern Aceh coast. This coastal lowland contains stratigraphic evidence of previous great earthquakes and tsunamis on the Sunda megathrust that affected the coastline for hundreds of kilometers. We focused our research at three coastal sites in northwestern Aceh province. We conclude that three subduction zone earthquakes occurred in the early to mid Holocene (4500-7000 years ago) with an average recurrence of approximately 1000 years during conditions of relative sea level rise. Detailed investigations of lithology and micro- and macrofossil assemblages reveal regionally extensive buried mangrove soils that were coseismically subsided during the earthquakes and abruptly overlain by thin sand deposits of tsunami origin. The sands are covered by a sequence of intertidal muds. Tsunami deposits are inconsistently preserved, whereas the coseismic signal from buried soils is ubiquitously preserved. There is no stratigraphic record of subsidence in the late Holocene (4500 years to present) along the same coastal reach. In this time interval, far field locations such as Sumatra record stable or falling relative sea levels, which precludes coastal weltand progradation that leads to preservation of buried soils. In this younger, late Holocene time interval, the search for unique depocenters that preserve tsunami deposits provides a promising, alternative approach to constructing a paleoseimic record for the Aceh portion of the Sunda subduction zone.

  1. Numerical study of a downslope windstorm in Northwestern Greece

    NASA Astrophysics Data System (ADS)

    Koletsis, I.; Lagouvardos, K.; Kotroni, V.; Bartzokas, A.

    2009-10-01

    This paper describes the leeside wind storm of 25-26 March 1998, the most intense wind storm of the last decade in Northwestern Greece. This wind storm produced wind gusts of ˜ 30 m s - 1 that resulted in tree uprooting, roof damaging, electric power network disruption and flooding in the lake-side areas of Ioannina city in Northwestern Greece. With the aim to identify the role of Mountain Mitsikeli near the city of Ioannina on the windstorm and to investigate the physical mechanisms responsible for such orographically induced weather events, numerical simulations with MM5 model have been performed. The model results showed that a resolution of 2-km resolution is necessary in order to reproduce the localized character of the wind storm. The analysis revealed that a synergistic combination of the cross-barrier northeasterly flow, the stable layer above the mountain top and the presence of a critical level, led to the intensification of the lee side winds during the studied wind event. Sensitivity experiments with modified topography, further supported the important role of mountain Mitsikeli that stands as an isolated obstacle, on the modification of the wind field during the observed windstorm.

  2. Seismicity of Northwestern Italy during the last 30 years

    NASA Astrophysics Data System (ADS)

    Scafidi, D.; Barani, S.; De Ferrari, R.; Ferretti, G.; Pasta, M.; Pavan, M.; Spallarossa, D.; Turino, C.

    2015-01-01

    The aim of this work is to describe the seismicity of Northwestern Italy from the very detailed picture provided by 30 years of accurate instrumental recordings coming from the Regional Seismic Network of Northwestern Italy (RSNI—University of Genoa). In an attempt to provide, for the first time, a comprehensive view of the seismicity in the area, this study describes the main characteristics of the database collected by the RSNI network. The seismicity is spread almost over the entire area, but it is mainly concentrated in the Northern Apennines and in the western sector of the Alps. The seismicity of the area is superficial: It is almost confined to the first 20 km of depth. Only a few deeper events are located in a small area southwest of the city of Turin, down to a depth of 80 km, and below the Northern Apennines down to 60-70-km depth. The majority of the earthquakes in this sector of the Italian peninsula are of low magnitude; nevertheless, the areas where the highest magnitude earthquakes took place during the last three decades are the Northern Apennines and the lower Piedmont, on land, and the Ligurian Sea, offshore. They are indeed the areas where the most damaging historical earthquakes have occurred, giving emphasis, if necessary, to the importance of continuous seismic monitoring.

  3. Retrowedge-related Carboniferous units and coeval magmatism in the northwestern Neuquén province, Argentina

    NASA Astrophysics Data System (ADS)

    Zappettini, Eduardo O.; Chernicoff, Carlos J.; Santos, Joao O. S.; Dalponte, Marcelo; Belousova, Elena; McNaughton, Neal

    2012-11-01

    The studied Carboniferous units comprise metasedimentary (Guaraco Norte Formation), pyroclastic (Arroyo del Torreón Formation), and sedimentary (Huaraco Formation) rocks that crop out in the northwestern Neuquén province, Argentina. They form part of the basement of the Neuquén Basin and are mostly coeval with the Late Paleozoic accretionary prism complex of the Coastal Cordillera, south-central Chile. U-Pb SHRIMP dating of detrital zircon yielded a maximum depositional age of 374 Ma (Upper Devonian) for the Guaraco Norte Formation and 389 Ma for the Arroyo del Torreón Formation. Detrital magmatic zircon from the Guaraco Norte Formation are grouped into two main populations of Devonian and Ordovician (Famatinian) ages. In the Arroyo del Torreón Formation, zircon populations are also of Devonian and Ordovician (Famatinian), as well as of Late Neoproterozoic and Mesoproterozoic ages. In both units, there is a conspicuous population of Devonian magmatic zircon grains (from 406 ± 4 Ma to 369 ± 5 Ma), indicative of active magmatism at that time range. The ?Hf values of this population range between -2.84 and -0.7, and the TDM-(Hf) are mostly Mesoproterozoic, suggesting that the primary sources of the Devonian magmatism contained small amounts of Mesoproterozoic recycled crustal components. The chemical composition of the Guaraco Norte Formation corresponds to recycled, mature polycyclic sediment of mature continental provenance, pointing to a passive margin with minor inputs from continental margin magmatic rocks. The chemical signature of the Huaraco Formation indicates that a magmatic arc was the main provenance for sediments of this unit, which is consistent with the occurrence of tuff—mostly in the Arroyo del Torreón Formation and very scarcely in the Huaraco Formation—with a volcanic-arc signature, jointly indicating the occurrence of a Carboniferous active arc magmatism during the deposition of the two units. The Guaraco Norte Formation is interpreted to represent passive margin deposits of mostly Lower Carboniferous age (younger than 374 Ma and older than 326 Ma) that precede the onset of the accretionary prism in Chile and extend into the earliest stage of the accretion, in a retrowedge position. The Arroyo del Torreón and Huaraco formations are considered to be retrowedge basin deposits to the early frontal accretionary prism (Eastern Series) of Chile. The presence of volcanism with arc signature in the units provides evidence of a Mississippian magmatic arc that can be correlated with limited exposures of the same age in the Frontal Cordillera (Argentina). The arc would have migrated to the West (Coastal Batholith) during Pennsylvanian-Permian times (coevally with the later basal accretionary prism/Western Series). The source of a conspicuous population of Devonian detrital zircon interpreted to be of magmatic origin in the studied units is discussed in various possible geotectonic scenarios, the preferred model being a magmatic arc developed in the Chilenia block, related to a west-dipping subduction beneath Chilenia before and shortly after its collision against Cuyania/Gondwana, at around 390 Ma and not linked to the independent, Devonian-Mississippian arc, developed to the south, in Patagonia.

  4. Use of Anticlines for Geologic Sequestration of Carbon Dioxide in a Saline Aquifer in Northwestern Taiwan

    NASA Astrophysics Data System (ADS)

    Lin, Shin-Hsun; Liou, Tai-Sheng

    2013-04-01

    In this study, migration of CO2 in a deep saline aquifer with anticlines under various injection schemes was numerically simulated using the ECO2N simulator. The hypothetical study site was selected at the Taoyuan Plateau near the second largest coal-fired power plant, Datan power plant (annual CO2 emission of 1.5 Mt/yr), in Northwestern Taiwan. A 15x15 km2 simulation domain, containing two sub-parallel east-northeast Hukou and Pingzhen anticlines, was discretized into unstructured grid with spatial refinement at the injection borehole. Kueichulin sandstone and Chinshui shale in the simulation domain were considered as the storage formation and the cap rock, respectively. It was assumed that no CO2 exists in the aquifer prior to injection, and that the aquifer has a hydrostatic pressure distribution and a constant salinity of 3%. All boundaries were assumed to be "open". Isothermal simulations with 1 Mt/yr injection rate and 20 years of injection period were considered. van Genuchten capillary pressure and Corey relative permeability were assumed for all rock formations. Simulation results indicated that pressure buildup characterized the CO2 migration into three different phases: drainage of brine, formation dry-out, and dissolution and gravity take-over . It was found that the worst leakage scenario occurs if a single injection borehole is placed along the anticline axis. In this case, rock formations near the anticline axis provide a leakage path such that CO2 ultimately leaks out of the upper boundary. On the other hand, CO2 can be safely sequestrated in the storage formation if the injection borehole was placed away from the anticline axis. This is because gas phase CO2 migrates along the counter dipping direction of the anticline as a result of buoyancy. More favorable scenarios were found if a multiple-borehole injection scheme was used. In such cases, not only pressure buildup was significantly mitigated but the amount of precipitated salt was reduced. If a five-borehole scheme was used, for example, pressure buildup and the amount of precipitated salt can be reduced by 20% and 90%, respectively. More interestingly, if injection borehole was placed midway between the two anticlines, buoyancy dominates the migration of CO2 such that most CO2 is accumulated under the apex of anticline. Therefore, it is suggested that a multiple-borehole injection scheme would be a preferable scenario because of the reduced risks of pressure buildup and salt precipitation. Moreover, it would be better to place the injection boreholes away from the anticline axis in order to make good use of all possible trapping mechanisms to permanently sequestrate CO2 in deep rock formations.

  5. Thermal maturity and source-rock potential in Northwestern Melville Island, Arctic Canada

    SciTech Connect

    Gentzis, T. (Alberta Research Council, Coal Research Center Devon, One Oil Patch Drive, Devon, Alberta T0C 1E0 (CA)); Goodarzi, F. (Geological Survey of Canada, Calgary, AB (Canada))

    1992-10-01

    This paper reports that approximately 130 core and drillhole cuttings samples taken from the Palaeozoic and Mesozoic of northwestern Melville Island were examined using reflected-light microscopy and Rock-Eval pyrolysis. The Palaeozoic section is dominated by bitumen, and often numerous bitumen populations are identified based on morphology, texture, and optical properties. Bitumen reflectance increases with depth, following a trend almost parallel to vitrinite, an indication that it is primary and has been subjected to similar thermal stress. The upper Palaeozoic sediments are within the hydrocarbon generation zone but have limited potential, except for an algal-rich interval in the Permian Trold Fiord Formation. Overall, the study is important because it attempts to identify the source rocks in an area of Melville Island where no previous work has been reported on the hydrocarbon-generating potential of the sedimentary succession. In addition, the use of bitumen reflectance in lower Palaeozoic strata devoid of vitrinite is evaluated and the amount of eroded section is calculated based on the thermal maturity pattern of bitumen.

  6. Investigation of Salt Loss from the Bonneville Salt Flats, Northwestern Utah

    USGS Publications Warehouse

    Mason, James L.; Kipp, Kenneth L.

    1997-01-01

    The Bonneville Salt Flats study area is located in the western part of the Great Salt Lake Desert in northwestern Utah, about 110 miles west of Salt Lake City. The salt crust covers about 50 square miles, but the extent varies yearly as a result of salt being dissolved by the formation and movement of surface ponds during the winter and redeposited with the evaporation of these ponds during the summer. A decrease in thickness and extent of the salt crust on the Bonneville Salt Flats has been documented during 1960-88 (S. Brooks, Bureau of Land Management, written commun., 1989). Maximum salt-crust thickness was 7 feet in 1960 and 5.5 feet in 1988. No definitive data are available to identify and quantify the processes that cause salt loss. More than 55 million tons of salt are estimated to have been lost from the salt crust during the 28-year period. The Bureau of Land Management needs to know the causes of salt loss to make appropriate management decisions.

  7. New Circulation Features in the Northwestern Tropical Pacific Ocean from Profiling Float Measurements

    NASA Astrophysics Data System (ADS)

    Qiu, B.; Rudnick, D. L.; Chen, S.

    2012-12-01

    Ten SOLO-II profiling floats have were deployed in the northwestern tropical Pacific Ocean in August 2011 as part of the ONR's Origin of the Kuroshio and Mindanao Currents (OKMC) project. These floats have a 5-day repeat cycle and measure T/S profiles at a vertical resolution of 2-dbars. By combining the OKMC and Argo data, we observed two well-defined branches of the eastward-flowing subtropical countercurrent (STCC). These two branches, located respectively along 19.0N and 21.5N, are embedded within the westward-flowing North Equatorial Current (NEC) between 7N and 25N and above the 26.5 isopycnal surface. Below the unventilated 26.5 isopycnal layer, the circulation is dominated by three, eastward-flowing, zonal jets. Dubbed the North Equatorial Undercurrent Jets (NEUJ), these three subthermocline jets are quasi-stationary and persist approximately along 10N, 13N and 18N, respectively. In the presentation, we will discuss in detail the mean structure and formation mechanism of these newly-observed NEUJs.

  8. Previously unrecognized ornithuromorph bird diversity in the Early Cretaceous Changma Basin, Gansu Province, northwestern China.

    PubMed

    Wang, Ya-Ming; O'Connor, Jingmai K; Li, Da-Qing; You, Hai-Lu

    2013-01-01

    Here we report on three new species of ornithuromorph birds from the Lower Cretaceous Xiagou Formation in the Changma Basin of Gansu Province, northwestern China: Yumenornis huangi gen. et sp. nov., Changmaornis houi gen. et sp. nov., and Jiuquanornis niui gen. et sp. nov.. The last of these is based on a previously published but unnamed specimen: GSGM-05-CM-021. Although incomplete, the specimens can be clearly distinguished from each other and from Gansus yumenensis Hou and Liu, 1984. Phylogenetic analysis resolves the three new taxa as basal ornithuromorphs. This study reveals previously unrecognized ornithuromorph diversity in the Changma avifauna, which is largely dominated by Gansus but with at least three other ornithuromorphs. Body mass estimates demonstrate that enantiornithines were much smaller than ornithuromorphs in the Changma avifauna. In addition, Changma enantiornithines preserve long and recurved pedal unguals, suggesting an arboreal lifestyle; in contrast, Changma ornithuromorphs tend to show terrestrial or even aquatic adaptions. Similar differences in body mass and ecology are also observed in the Jehol avifauna in northeastern China, suggesting niche partitioning between these two clades developed early in their evolutionary history. PMID:24147058

  9. Integrated chemostratigraphy and biostratigraphy of the Windermere Supergroup, northwestern Canada: implications for Neoproterozoic correlations and the early evolution of animals.

    PubMed

    Narbonne, G M; Kaufman, A J; Knoll, A H

    1994-10-01

    The thick, richly fossiliferous succession of the upper Windermere Supergroup, Mackenzie Mountains, northwestern Canada, provides a test of integrated biostratigraphic and chemostratigraphic frameworks in terminal Proterozoic correlation. The C- and Sr-isotopic abundances of lower Keele Formation carbonates approximate those for other pre-Varanger samples, confirming that the simple disc-like fossils of the underlying Twitya Formation predate all known diverse Ediacaran faunas. "Tepee" and Sheepbed carbonates record strong post-glacial isotopic excursions; in contrast, delta13C values for Gametrail through Risky carbonates vary only within the narrow range of about +l% to +2%. A second negative excursion occurs in Ingta Formation carbonates that immediately underlie the paleontologically determined Precambrian-Cambrian boundary. The upper Windermere profile as a whole compares closely with curves determined for other terminal Proterozoic successions. The lowermost diverse Ediacaran assemblages in the Sheepbed Formation correlate chemostratigraphically with the oldest fauna in Namibia, but the two assemblages differ in taxonomic composition. Blueflower assemblages correlate both chemostratigraphically and taxonomically with faunas from Australia, China, Siberia, and elsewhere. Increasing data support the hypothesis that paleontological and geochemical data together provide a reliable means of correlating terminal Proterozoic sedimentary rocks throughout the world. PMID:11539403

  10. Zonal management of arsenic contaminated ground water in Northwestern Bangladesh.

    PubMed

    Hill, Jason; Hossain, Faisal; Bagtzoglou, Amvrossios C

    2009-09-01

    This paper used ordinary kriging to spatially map arsenic contamination in shallow aquifers of Northwestern Bangladesh (total area approximately 35,000 km(2)). The Northwestern region was selected because it represents a relatively safer source of large-scale and affordable water supply for the rest of Bangladesh currently faced with extensive arsenic contamination in drinking water (such as the Southern regions). Hence, the work appropriately explored sustainability issues by building upon a previously published study (Hossain et al., 2007; Water Resources Management, vol. 21: 1245-1261) where a more general nation-wide assessment afforded by kriging was identified. The arsenic database for reference comprised the nation-wide survey (of 3534 drinking wells) completed in 1999 by the British Geological Survey (BGS) in collaboration with the Department of Public Health Engineering (DPHE) of Bangladesh. Randomly sampled networks of zones from this reference database were used to develop an empirical variogram and develop maps of zonal arsenic concentration for the Northwestern region. The remaining non-sampled zones from the reference database were used to assess the accuracy of the kriged maps. Two additional criteria were explored: (1) the ability of geostatistical interpolators such as kriging to extrapolate information on spatial structure of arsenic contamination beyond small-scale exploratory domains; (2) the impact of a priori knowledge of anisotropic variability on the effectiveness of geostatistically based management. On the average, the kriging method was found to have a 90% probability of successful prediction of safe zones according to the WHO safe limit of 10ppb while for the Bangladesh safe limit of 50ppb, the safe zone prediction probability was 97%. Compared to the previous study by Hossain et al. (2007) over the rest of the contaminated country side, the probability of successful detection of safe zones in the Northwest is observed to be about 25% higher. An a priori knowledge of anisotropy was found to have inconclusive impact on the effectiveness of kriging. It was, however, hypothesized that a preferential sampling strategy that honored anisotropy could be necessary to reach a more definitive conclusion in regards to this issue. PMID:19473745

  11. Sulfur geochemical constraints on mesoproterozoic restricted marine deposition: lower Belt Supergroup, northwestern United States

    NASA Astrophysics Data System (ADS)

    Lyons, Timothy W.; Luepke, James J.; Schreiber, Madeline E.; Zieg, Gerald A.

    2000-02-01

    Despite nearly a century of study by a diverse group of Precambrian workers, competing interpretations have persisted that favor both marine and nonmarine depositional settings for the Mesoproterozoic Belt Supergroup of the northwestern United States. Our data for sedimentary pyrite formation in unmetamorphosed organic-rich shales of the Newland Formation of the lower Belt Supergroup, western Montana, argue that at least a portion of the Belt basin, during its early history, was characterized by restricted marine conditions with only episodic incursions of seawater. This model is supported by ratios of organic carbon (C org) to pyrite sulfur that, once corrected for selective diagenetic and thermal loss of C org and the inferred high reactivity of the C org reservoir in the absence of vascular land-plant remains, suggest degrees of sulfate limitation consistent with a restricted marine setting. The isotopically heavy disseminated pyrite that dominates the black shales shows a broad range of ? 34S values of bacterial origin (? 34S ranges from -8.7 to +36.3‰; mean = +7.6‰, n = 41). The pyrite data overlap with the ? 34S range of coeval (barite) sulfate within the basin and are similar to independent estimates for the sulfate of Mesoproterozoic seawater. These relationships have allowed us to delineate a record of bacteriogenic pyrite that formed in a modified marine reservoir where the supply of sulfate was limited. A bacterial mechanism is further suggested by the morphological character of this early-formed pyrite, including the ubiquitous framboids. After comparing our results with those from present-day localities, such as the Black Sea and sites of lacustrine deposition, we conclude that the abundant 34S-enriched bacteriogenic disseminated pyrite observed in black shales of the Newland Formation must record a style of sulfate limitation possible only within an isolated marine basin receiving an intermittent flux of seawater. Although the entire Belt basin likely remained a restricted marine setting throughout deposition of the lower Belt Supergroup, sulfur isotope data from the Newland Formation at two localities separated by more than 150 km in the eastern Belt basin reveal stratigraphic trends in the strength of the marine connection. Specifically, the connection evolved such that inputs of seawater sulfate increased progressively in frequency and possibly strength during deposition of the Newland Formation. Overall, the hypothesized restricted marine setting, when viewed in light of independent tectonic, sedimentologic and geochronologic evidence, suggests syndepositional and likely episodic continental rifting, which helps constrain the Proterozoic paleotectonic history of western Laurentia.

  12. Microfacies analysis of the Leonardian-Guadalupian lower member of the San Andres Formation in the southern Sacremento Mountains, Otero County, New Mexico

    Microsoft Academic Search

    R. E. Clemons

    1992-01-01

    The Rio Bonito Member of the San Andres Formation records a transgression of the northwestern shelf during the late Leonardian. Late Leonardian to Guadalupian marine carbonates exposed in the Sacramento Mountains relate a marked change from equatorial tidal flat rocks of the middle Leonardian Yeso Formation. These rocks were deposited during a worldwide sea level lowstand. The Yeso-San Andres contact,

  13. Autonomous Crack Displacement Monitoring of a Residence Near a Quarry David E. Kosnik, Northwestern University

    E-print Network

    involvement with the vibration monitoring program. Instrumentation A residence in Naples, Florida, Autonomous Crack Displacement Monitoring of a Residence Near a Quarry David E. Kosnik, Northwestern by diurnal temperature changes, weather fronts, occupant activity, and other phenomena. The remote monitoring

  14. Geochemical associations and availability of cadmium (Cd) in a paddy field system, Northwestern Thailand 

    E-print Network

    Kosolsaksakul, Peerapat

    2014-11-27

    The Mae Tao watershed, northwestern Thailand, has become contaminated with cadmium (Cd) from the zinc mining activities area in the nearby Thanon-Thongchai mountains. Consumption of Cd-contaminated rice has led to ...

  15. Evidence for bimodal hybrid zones between two species of char (Pisces: Salvelinus) in northwestern North America

    E-print Network

    Taylor, Eric B. "Rick"

    ) and bull trout (Salvelinus confluentus) have widely overlapping, but largely parapatric ranges in waterEvidence for bimodal hybrid zones between two species of char (Pisces: Salvelinus) in northwestern; reproductive isolation; salmonidae; speciation. Abstract Dolly Varden (Salvelinus malma, Pisces: Salmonidae

  16. Northwestern Researchers Develop Bistable Nanoswitch Science Daily --Carbon nanotubes (CNT) have been under intense study by

    E-print Network

    Espinosa, Horacio D.

    tunneling. The device could help advance technological developments in memory chips and electronic sensing-situ electron microscopy and electronic measurement techniques capable of controlling noise and parasitic Source: Northwestern University Date: October 16, 2006 More on: Electronics, Nanotechnology, Technology

  17. Northwestern University technical progress reports, December 1, 1990--November 30, 1991

    SciTech Connect

    Rosen, J.; Block, M.; Buchholz, D.; Gobbi, B.; Schellman, H.; Miller, D.; Braaten, E.; Chang, D.; Oakes, R.

    1991-12-31

    This report discusses research in High Energy Physics at Northwestern University. Topic discusses are charmonium production, photoproduction, deep inelastic muon scattering, particle decays, cp violation, standard model, neutrino mass, Do detectors, and other High Energy research. (LSP)

  18. NORTHWESTERN UNIVERSITY System Design and Verification of the Precession Electron Diffraction Technique

    E-print Network

    Shull, Kenneth R.

    NORTHWESTERN UNIVERSITY System Design and Verification of the Precession Electron Diffraction. Precession electron diffraction technology has been deficient in two areas. Firstly, the early. This thesis endeavors to take a large step toward the realization of precession electron diffraction

  19. Northwestern University May 16, 2013 1 Analysis of Naturalistic Driving Study Data

    E-print Network

    Bustamante, Fabián E.

    * SHRP 2 NDS * Safety Pilot (UMTRI; PC and Truck) * 100-car Study * FOTs people believe NDS data make safety analysis easier . . . Because detailed Northwestern University May 16, 2013 5 Basic Idea #12;Many people believe NDS

  20. Version: 1/1/2013 Page 1 Northwestern University Feinberg School of Medicine

    E-print Network

    Chisholm, Rex L.

    ............................................................................8 F. Training and Education Regarding Use of Medical Devices HealthCare Northwestern Medical Faculty Foundation 2013 Professional Integrity Handbook #12;Version: 1..................................................................................................................7 D. Medical Educational Programs and Continuing Medical Education

  1. ATMOSPHERIC VOLATILE HYDROCARBON COMPOSITION AT FIVE REMOTE SITES IN NORTHWESTERN NORTH CAROLINA

    EPA Science Inventory

    The results of a study to measure the volatile hydrocarbon composition of the atmosphere at several sites in the southern Appalachian Mountains of northwestern North Carolina are presented. Ambient air was sampled repeatedly at five geographically and botanically different remote...

  2. Topographically controlled grassland soils in the Boreal Cordillera ecozone, northwestern Canada

    E-print Network

    Sanborn, Paul

    Topographically controlled grassland soils in the Boreal Cordillera ecozone, northwestern Canada 2009, accepted 16 October 2009. Sanborn, P. 2010. Topographically controlled grassland soils relationships of grassland soils were examined at three widely separated sites (Stikine River Valley, British

  3. NORTHWESTERN UNIVERSITY Automated Monitoring and Inverse Analysis of a Deep Excavation in Seattle

    E-print Network

    NORTHWESTERN UNIVERSITY Automated Monitoring and Inverse Analysis of a Deep Excavation in Seattle #12;ii ABSTRACT Automated Monitoring and Inverse Analysis of a Deep Excavation in Seattle Miltiadis Langousis Performance monitoring of deep excavations typically includes slope inclinometers, optical

  4. Spatial distribution of geotechnical properties in surficial marine sediments-Northwestern slope region, Gulf of Mexico 

    E-print Network

    Meyer, Matthew Kael

    2001-01-01

    The northwestern portion of the Gulf of Mexico continental slope features approximately 90 intraslope basins offshore Texas and Louisiana. Domes of high elevations, sometimes resulting in a difference of 1000 meters from top to bottom, separate...

  5. Northwestern University Archives Evanston, Illinois Records of the Waa-Mu Show, 1929-1992

    E-print Network

    that helped to launch the careers of dozens of Broadway and Hollywood performers, has been a campus tradition, and Darrell Ware headed to Hollywood to write screenplays. In 1931 Northwestern president Walter Dill Scott

  6. Northwestern University 2/2007 Transcript Review for Science: Chemistry Designation

    E-print Network

    Shahriar, Selim

    : General Physical Chemistry ____________________ Organic Chemistry and Physical Chemistry OneNorthwestern University 2/2007 Transcript Review for Science: Chemistry Designation No course below ___________________________________________ Additional Chemistry foundation courses: CHEM 102: General Inorganic Chemistry ____________________ CHEM 103

  7. 78 FR 9327 - Hawaii Crustacean Fisheries; 2013 Northwestern Hawaiian Islands Lobster Harvest Guideline

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-08

    ...DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration 50 CFR Part 665 RIN 0648-XC453 Hawaii Crustacean Fisheries; 2013 Northwestern Hawaiian Islands Lobster Harvest Guideline AGENCY: National Marine Fisheries...

  8. 76 FR 4551 - Hawaii Crustacean Fisheries; 2011 Northwestern Hawaiian Islands Lobster Harvest Guideline

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-26

    ...DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration 50 CFR Part 665 RIN 0648-XA159 Hawaii Crustacean Fisheries; 2011 Northwestern Hawaiian Islands Lobster Harvest Guideline AGENCY: National Marine Fisheries...

  9. 75 FR 53687 - Southern Montana Electric Generation & Transmission Cooperative, Inc. v. NorthWestern Corporation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-01

    ...Docket No. EL10-82-000] Southern Montana Electric Generation & Transmission Cooperative, Inc. v. NorthWestern Corporation...and Procedure, 18 CFR 385.206, Southern Montana Electric Generation & Transmission Cooperative, Inc. (Complainant) filed...

  10. New blueberry and mortiño relatives (Ericaceae) from northwestern Colombia.

    PubMed

    Pedraza-Peñalosa, Paola

    2015-01-01

    The inventory of the vascular plants of one of the richest and least studied floras, the Andean and Chocó regions of northwestern Colombia, targets Las Orquídeas National Park. As a result of field trips to areas never before collected, several epiphytic and small terrestrial shrubs in the family Ericaceae have been discovered in the Park's humid forests. Five new, morphologically remarkable species of Ericaceae (tribe Vaccinieae), are here described and illustrated. In a separate phylogenetic analysis, Psammisiapinnata Pedraza, Psammisiapseudoverticillata Pedraza, Satyriaorquidiensis Pedraza, and Satyriapterocalyx Pedraza, were placed by molecular sequence data within clades of the non-monophyletic genera Psammisia and Satyria; phylogenetic evidence for the placement of Psammisiasophiae Pedraza is still lacking. Their affinities are here discussed, along with their preliminary conservation status. PMID:25987884

  11. New blueberry and mortiño relatives (Ericaceae) from northwestern Colombia

    PubMed Central

    Pedraza-Peñalosa, Paola

    2015-01-01

    Abstract The inventory of the vascular plants of one of the richest and least studied floras, the Andean and Chocó regions of northwestern Colombia, targets Las Orquídeas National Park. As a result of field trips to areas never before collected, several epiphytic and small terrestrial shrubs in the family Ericaceae have been discovered in the Park’s humid forests. Five new, morphologically remarkable species of Ericaceae (tribe Vaccinieae), are here described and illustrated. In a separate phylogenetic analysis, Psammisia pinnata Pedraza, Psammisia pseudoverticillata Pedraza, Satyria orquidiensis Pedraza, and Satyria pterocalyx Pedraza, were placed by molecular sequence data within clades of the non-monophyletic genera Psammisia and Satyria; phylogenetic evidence for the placement of Psammisia sophiae Pedraza is still lacking. Their affinities are here discussed, along with their preliminary conservation status. PMID:25987884

  12. Hantavirus Infection in Humans and Rodents, Northwestern Argentina

    PubMed Central

    Levis, Silvana; Calderón, Gladys; Ramirez, Josefina; Bravo, Daniel; Lozano, Elena; Ripoll, Carlos; St. Jeor, Stephen; Ksiazek, Thomas G.; Barquez, Ruben M.; Enria, Delia

    2003-01-01

    We initiated a study to elucidate the ecology and epidemiology of hantavirus infections in northern Argentina. The northwestern hantavirus pulmonary syndrome (HPS)–endemic area of Argentina comprises Salta and Jujuy Provinces. Between 1997 and 2000, 30 HPS cases were diagnosed in Jujuy Province (population 512,329). Most patients had a mild clinical course, and the death rate (13.3%) was low. We performed a serologic and epidemiologic survey in residents of the area, in conjunction with a serologic study in rodents. The prevalence of hantavirus antibodies in the general human population was 6.5%, one of the highest reported in the literature. No evidence of interhuman transmission was found, and the high prevalence of hantavirus antibody seemed to be associated with the high infestation of rodents detected in domestic and peridomestic habitats. PMID:14519242

  13. A Santonian - Campanian boundary locality from North-western Turkey

    NASA Astrophysics Data System (ADS)

    Wolfgring, Erik; Wagreich, Michael; Dinarès-Turell, Jaume; Omer Yilmaz, Ismail; Boehm, Katharina

    2015-04-01

    A Santonian - Campanian boundary section, close to the village of Göynük in North-western Turkey (Bolu province), was recorded and examined in respect to nannofossil and foraminiferal biostratigraphy, magnetic susceptibility, as well as magnetic polarity. During the Late Cretaceous, the Mudurnu-Göynük basin was located in the northern Tethyan Ocean, on the Sakarya continent (between the Intra-Pontide Ocean and northern branch of the Tethys). The section yields reddish hemipelagic to pelagic deposits. The stratigraphically older part is characterised by uniform limestone. Towards the top, the section displays marls and marly limestones with frequent tuff intercalations. The section represents a hemipelagic to pelagic environment. Planktonic foraminifera prevail in numbers and represent a typical Santonian to Campanian foraminifera community. Benthic foraminifera are sparse. Biostratigraphic data suggest an age from the late Santonian Dicarinella asymetrica to the early Campanian Globotruncanita elevata planktonic foraminifera zone (nannofossil zones CC16-CC18). By investigation of magnetic polarity, the older part of the section can be assigned to the Santonian C34 normal, while the base-Campanian reversal C33r is evident in the upper part of the section. Results from the assessment of magnetic susceptibility give evidence for Milankovitch cycles. We witness a strong signal for what would presumably be the 400 kyr eccentricity cycle. The Campanian interval measured at this section gives results of unusually high values for magnetic susceptibility. Compared to the older part of the section, we find values twice as high in the younger interval. As evidence for volcanic activity is frequent in the Campanian part of the section, the abrupt shift in the magnitude of magnetic susceptibility values may be explained by volcanic admixture. Apart from implications for biostratigraphy and palaeoenvironments, the record of frequent volcanic activities in this Santonian - Campanian boundary section might also provide insights in the history of volcanic events in the North-western Tethyan realm.

  14. Changes in the mesozooplankton community associated with the hydrography off the northwestern Iberian Peninsula

    Microsoft Academic Search

    Leocadio Blanco-Bercial; Florentina Alvarez-Marques; Jesus A. Cabal

    2006-01-01

    Blanco-Bercial, L., Alvarez-Marques, F., and Cabal, J. A. 2006. Changes in the mesozoo- plankton community associated with the hydrography off the northwestern Iberian Peninsula. e ICES Journal of Marine Science, 63: 799e810. Changes in the mesozooplankton community were investigated along the northwestern coast of the Iberian Peninsula during OMEX II cruises in August 1998, under upwelling conditions, and in October

  15. Satellite observations and estimates of surface flow in the northwestern Gulf of Mexico

    E-print Network

    Barron, Charlie Nelms

    1992-01-01

    was calibrated using Argos-reported measurements from surface drifters. . . . . . . . . . . . . Complete set of Argos drifter trajectories in the northwestern Gulf of Mexico from March snd April, 1989. Open circles indicate initial positions, snd solid... circles mark daily positions at 00:00 GMT. . . Ten-day segments of Argos drifter trajectories in the northwestern Gulf of Mexico during (a) March 6 to March 16 and (b) March 16 to March 26. Multi-day segments of Argos drifter trajectories...

  16. A volumetric temperature-salinity census for the continental shelf of the northwestern Gulf of Mexico 

    E-print Network

    Ulm, William Francis

    1983-01-01

    A VOLUMETRIC TEMPERATURE-SALINITY CENSUS FOR THE CONTINENTAL SHELF OF THE NORTHWESTERN GULF OF MEXICO A Thesis by WILLIAM FRANCIS ULM Submitted to the Graduate College of Texas A&M University in partxal fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 19B3 Major Subject: Oceanography A VOLUMETRIC TEMPERATURE-SALINITY CENSUS FOR THE CONTINENTAL SHELF OF THE NORTHWESTERN GULF OF MEXICO A Thesis by WILLIAM FRANCIS ULM Approved as to style and content by: John...

  17. Satellite observations and estimates of surface flow in the northwestern Gulf of Mexico 

    E-print Network

    Barron, Charlie Nelms

    1992-01-01

    SATELLITE OBSERVATIONS AND ESTIMATES OF SURFACE FLOW IN THE NORTHWESTERN GULF OF MEXICO A Thesis by CHARLIE NELMS BARRON JR. Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1992 Major Subject: Oceanography SATELLITE OBSERVATIONS AND ESTIMATES OF SURFACE FLOW IN THE NORTHWESTERN GULF OF MEXICO A Thesis by CHARLIE NELMS BARRON JR. Approved as to style and content by: Andrew C. Vastano...

  18. Intense phenomena during the winter of 1998/1999 in the northwestern Mediterranean Sea

    NASA Astrophysics Data System (ADS)

    Hong, X.; Hodur, R. M.; Pascual, A.; Cummings, J. A.; Martin, P. J.

    2003-04-01

    The Northwestern Mediterranean Sea was characterized by intense weather and ocean phenomena during the winter of 1998/1999. This winter season exhibited very strong and prolonged periods of northwesterly winds (Mistral) with associated large losses of heat from the ocean due to enhanced surface buoyancy fluxes. Dense water formation occurred in the Gulf of Lion as the surface layer temperature dropped to 12 oC and the salinity increased to 38.2 psu. Hydrological and current data collected in 1999 revealed the spreading of newly formed deep water with unusual characteristics over the whole Algero-Provencal basin (Bethoux et al. 2002) and provided evidence of deep-water formation during the intense weather phenomenon. Sea surface topography from the TOPEX/Poseidon and ERS satellites, SST images derived from advanced very high resolution radiometer (AVHRR) sensors, and conductivity-temperature-depth (CTD) data collected during an oceanographic survey showed the presence of an intense anticyclonic eddy in the Balearic Sea from September 1998 to March 1999. The formation of this eddy is believed to be related to the transmission of anticyclonic vorticity from the shear of the strong Mistral (Pascual et al. 2002). To investigate these intense phenomena during the winter of 1998/1999, high-resolution (6-km) numerical simulations are conducted for the Mediterranean Sea using the US Navy Coastal Ocean Model (NCOM). The surface atmospheric forcing fields used in NCOM are from atmospheric reanalyses of the Mediterranean Sea area produced by the US Navy's Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPSTM). The reanalyzed fields include 10-m surface wind, surface wind stress, surface sensible and latent heat fluxes, solar and long-wave radiation at the surface, and accumulated precipitation. The temporal resolution of the atmospheric forcing fields is 1 hr and the horizontal resolution is 27 km. The simulations of these events are compared against all available observations. The mechanisms for the formation and development of the intense ocean phenomena during the winter of 1998/1999 are also investigated and discussed with sensitivity experiments under different atmospheric forcing.

  19. 2012 Viewor PayTuition Bill Page1 NorthwesternUniversity CAESAR/SES Updated:07/23/2012

    E-print Network

    Shahriar, Selim

    ©2012 Viewor PayTuition Bill Page1 NorthwesternUniversity CAESAR/SES Updated:07/23/2012 SES NorthwesternUniversity CAESAR/SES Updated:07/23/2012 Step 3 To make a payment, click on the Make Payment link and then click the button. #12;©2012 Viewor PayTuition Bill Page3 NorthwesternUniversity CAESAR/SES Updated:07

  20. 2013 StudentHealthInsurance Page1 NorthwesternUniversity CAESAR/SES Updated:7/11/2013

    E-print Network

    Shahriar, Selim

    ©2013 StudentHealthInsurance Page1 NorthwesternUniversity CAESAR/SES Updated:7/11/2013 SES/CAESAR vID and password. The Home Page appears. #12;©2013 StudentHealthInsurance Page2 NorthwesternUniversity CAESAR/SES as an example, follows.) #12;©2013 StudentHealthInsurance Page3 NorthwesternUniversity CAESAR/SES Updated:7

  1. Sedimentation of the Triassic–Jurassic Adigrat Sandstone Formation, Blue Nile (Abay) Basin, Ethiopia

    Microsoft Academic Search

    A. Wolela

    2008-01-01

    Exploration of oil and gas deposits in the Blue Nile Basin targeted the Adigrat Sandstone Formation as a reservoir objective. Conglomerates, gravely sandstones, coarse to medium-grained sandstones, very fine-grained cross-bedded sandstones, siltstones and mudstones of the Adigrat Sandstone Formation were deposited in semi-arid to arid climates. The North-western highlands are the main source for the sedimentation. The poorly-sorted, crudely-bedded conglomerates

  2. Paleostress pattern and salt tectonics within a developing foreland basin (north-western Subhercynian Basin, northern Germany)

    NASA Astrophysics Data System (ADS)

    Brandes, Christian; Schmidt, Carolin; Tanner, David Colin; Winsemann, Jutta

    2013-11-01

    Analysing the paleostress field in sedimentary basins is important for understanding tectonic processes and the planning of drilling campaigns. The Subhercynian Basin of northern Germany is a perfect natural laboratory to study the paleostress field in a developing foreland basin. The simple layer-cake geometry of the basin-fill is dominated by several piercing and non-piercing salt structures. We derived the paleostress field from the orientation of fracture sets, faults, slickensides and stylolites. On a regional scale, the basin-fill is characterized by a horizontal compressional paleostress vector that is mainly NNE-SSW-oriented, which reflects the Late Cretaceous inversion phase in Central Europe. We show that the local paleostress field is distinctly perturbated due to the salt structures. Along the edge of the salt pillows, the maximum horizontal paleostress vector is deflected by up to 90° from the regional trend. In the case of the Elm salt pillow, it forms a radial pattern. Restoration of balanced cross-sections demonstrates at least 9 % of the shortening of the north-western part of the Subhercynian Basin was achieved by folding. The salt structures in the north-western Subhercynian Basin are the result of varying stress conditions. Initial extension in the Triassic caused first salt movements that prevailed during the Jurassic and Early Cretaceous. Most important is the Late Cretaceous contractional phase that shortened the diapirs and led to the formation of the salt pillows between diapirs due to detachment folding. We derive four main controlling factors for such salt-dominated contractional basins: (1) the wedge-shape basin-fill is the product of the dynamic load at the southern margin of the basin, (2) a basal salt layer fed the diapirs and acted as a detachment horizon during the later shortening, (3) detachment folding was the dominating deformation mechanism during contraction, and (4) the pre-existing diapirs controlled the position of the detachment folds.

  3. Sabkha and Burrow-Mediated Dolomitization in the Mississippian Debolt Formation, Northwestern

    E-print Network

    Konhauser, Kurt

    precipitated in equilibrium with calcite rather than by replacement of pre- existing calcite. Isotopic values to calcite values (mean 1.1%) within the burrows. This degree of fractionation is similar for dolomite enriched relative to measured calcite values (mean 3.2% for matrix; mean 3.1% for burrows). These isotopic

  4. Unknown Strong Earthquakes In North-western Caucasus In Holocen

    NASA Astrophysics Data System (ADS)

    Rogozhin, E.

    Studies and mapping on terrain seismo genic areas and determination of their modern seismic potential for the territory of the North-Western (Russian) Caucasus were fulfilled. The seismotectonic study of geological structures: faults, folds and blocks of the Earth's crust and allocation on this base of potential seismic sources of expected earthquakes (PSSs) was conducted. Fulfilled in the region investigations have allowed to study a structure of deforming ambiance's by compiling of 6 geophysical and structure-geological cross-sections and profiles, carried out given across stretching out folded systems. The important tectonic boundary between the Caucasus folded belt and the Transcaucasian microplate is studied on a south slope of The Main Caucasus Ridge. With the especial detailed where explored areas of largest faults in the region. On the south limb of the North-Western Caucasus near the above mentioned tectonic boundary the primary and secondary seismic ruptures of unknown ancient and known historical strong earthquakes (seismic faults, landslides, micrograbens) were discovered. Using an informative method of "trenching" enable to estimate a recurrence interval of seismic shocks in PSSs. The study of near surface structure of the faults in trenches to manage to define an absolute age of the seismic displacements, having place in Holocene on Malobzhid, Verkhnekhazar and Costal fault zones. Violated paleosoils have absolute age 990+- 100 years (IGAN 2126) for first fault and 520+-80 years (IGAN 2118) - for the second one. These seismic motions manages to identify with known, but referred to other seismic zone by strong earthquake Crimean-Kuban' region, 16 Septembers 1799. The seismic event magnitude was not less than 6.5, intensity - from 7 to 9. Determination of paleosoils and bones from the area of the Coastal fault absolute age denominated on surfaces in the manner of systems of escarps and gravitational- seismotectonic ruptures, has allowed to estimate periods of stability of the structure of 130+/-40, 6840+-30 years (IGAN-2417, 2418) and 2980+- 90 years (GIN-11728) ago. This signifies, that periods of activations of the structure, when colluvial and deluvial deposits accumulated, are correspondent at the time of near two -three thousand years and five thousand years ago. Thereby, the recurrence interval of strong earthquakes in the studied region is measured in 2 thousand years approximately.

  5. Community Problems in Eight Northwestern Counties. Report No. 1 of a Series on Quality of Life and Development in Northwestern Wisconsin, January 1976.

    ERIC Educational Resources Information Center

    Lambert, Virginia

    As part of a study of the quality of life in northwestern Wisconsin, questions re: important problems, public services, and environmental concerns were asked of a sample of 150 people in each of 5 counties (Bayfield, Douglas, Price, Taylor, and Washburn) in 1974. Responses to similar questions asked in a 1973 study of Ashland, Burnett, and Rusk…

  6. The AAS ``Semi-centennial" Meeting: Northwestern University and Yerkes Observatory, September 1947

    NASA Astrophysics Data System (ADS)

    Osterbrock, D. E.

    1999-05-01

    The AAS celebrated its "semi-centennial" fifty-two years ago! It was actually the fiftieth anniversary of the "First Conference" of astronomers and astrophysicists held at the dedication of Yerkes Observatory in 1897, which led to the actual formation of the Society two years later. Otto Struve, president of the AAS, was publicizing the fiftieth anniversary of his Yerkes Observatory in 1947, and he simply announced it was also the semi-centennial of the Society. Joel Stebbins, the grand old man of the AAS who had joined it as a graduate student in 1900, and held nearly every office in the Society from councilor to president, supported Struve's early celebration of the anniversary, probably largely because he was to retire himself in 1948. The meeting was held at Northwestern University and at Yerkes. There were then 625 AAS members. About 140 of them attended the meeting, and presented some 50 papers, all oral, with no parallel sessions. Struve organized a symposium on stellar atmospheres, with 5 invited speakers, and the great majority of the contributed papers were also on stars, a few on nebulae and interstellar matter, one on galaxies, and none on cosmology. Not to be outdone, Gerard P. Kuiper, who had recently succeeded Struve as director of Yerkes Observatory, organized a second symposium on the atmospheres of the planets, held at Yerkes immediately after the AAS meeting. After two days of sessions at Evanston, the members had driven to Williams Bay for the closing session Saturday, at which Struve and Stebbins gave their versions of the history of the observatory and of the Society. The two symposia formed the bases for two important books, Astrophysics: A Topical Symposium, and The Atmospheres of the Earth and the Planets, edited by J. Allen Hynek and Kuiper respectively.

  7. Clastic dikes of Heart Mountain fault breccia, northwestern Wyoming, and their significance

    USGS Publications Warehouse

    Pierce, W.G.

    1979-01-01

    Structural features in northwestern Wyoming indicate that the Heart Mountain fault movement was an extremely rapid, cataclysmic event that created a large volume of carbonate fault breccia derived entirely from the lower part of the upper plate. After fault movement had ceased, much of the carbonate fault breccia, here called calcibreccia, lay loose on the resulting surface of tectonic denudation. Before this unconsolidated calcibreccia could be removed by erosion, it was buried beneath a cover of Tertiary volcanic rocks: the Wapiti Formation, composed of volcanic breccia, poorly sorted volcanic breccia mudflows, and lava flows, and clearly shown in many places by inter lensing and intermixing of the calcibreccia with basal volcanic rocks. As the weight of volcanic overburden increased, the unstable water-saturated calcibreccia became mobile and semifluid and was injected upward as dikes into the overlying volcanic rocks and to a lesser extent into rocks of the upper plate. In some places the lowermost part of the volcanic overburden appears to have flowed with the calcibreccia to form dike like bodies of mixed volcanic rock and calcibreccia. One calcibreccia dike even contains carbonized wood, presumably incorporated into unconsolidated calcibreccia on the surface of tectonic denudation and covered by volcanic rocks before moving upward with the dike. Angular xenoliths of Precambrian rocks, enclosed in another calcibreccia dike and in an adjoining dikelike mass of volcanic rock as well, are believed to have been torn from the walls of a vent and incorporated into the basal part of the Wapiti Formation overlying the clastic carbonate rock on the fault surface. Subsequently, some of these xenoliths were incorporated into the calcibreccia during the process of dike intrusion. Throughout the Heart Mountain fault area, the basal part of the upper-plate blocks or masses are brecciated, irrespective of the size of the blocks, more intensely at the base and in places extending upward for several tens of meters. North of Republic Mountain a small 25-m-high upper-plate mass, brecciated to some degree throughout, apparently moved some distance along the Heart Mountain fault as brecciated rock. Calcibreccia dikes intrude upward from the underlying 2 m of fault breccia into the lower part of the mass and also from its top into the overlying volcanic rocks; an earthquake-related mechanism most likely accounts for the observed features of this deformed body. Calcibreccia dikes are more common within the bedding-plane phase of the Heart Mountain fault but also occur in its transgressive and former land-surface phases. Evidence that the Wapiti Formation almost immediately buried loose, unconsolidated fault breccia that was the source of the dike rock strongly suggests a rapid volcanic deposition over the area in which clastic dikes occur, which is at least 75 km long. Clastic dikes were injected into both the upper-plate and the volcanic rocks at about the same time, after movement on the Heart Mouuntain fault had ceased, and therefore do not indicate a fluid-flotation mechanism for the Heart Mountain fault. The difference between contacts of the clastic dikes with both indurated and unconsolidated country rock is useful in field mapping at localities where it is difficult to distinguish between volcanic rocks of the Cathedral Cliffs and Lamar River Formations, and the Wapiti Formation. Thus, calcibreccia dikes in the Cathedral Cliffs and Lamar River Formations show a sharp contact because the country rock solidified prior to fault movement, whereas calcibreccia dikes in the Wapiti Formation in many instances show a transitional or semifluid contact because the country rock was still unconsolidated or semifluid at the time of dike injection.

  8. Assessing impacts of unconventional natural gas extraction on microbial communities in headwater stream ecosystems in Northwestern Pennsylvania.

    PubMed

    Trexler, Ryan; Solomon, Caroline; Brislawn, Colin J; Wright, Justin R; Rosenberger, Abigail; McClure, Erin E; Grube, Alyssa M; Peterson, Mark P; Keddache, Mehdi; Mason, Olivia U; Hazen, Terry C; Grant, Christopher J; Lamendella, Regina

    2014-01-01

    Hydraulic fracturing and horizontal drilling have increased dramatically in Pennsylvania Marcellus shale formations, however the potential for major environmental impacts are still incompletely understood. High-throughput sequencing of the 16S rRNA gene was performed to characterize the microbial community structure of water, sediment, bryophyte, and biofilm samples from 26 headwater stream sites in northwestern Pennsylvania with different histories of fracking activity within Marcellus shale formations. Further, we describe the relationship between microbial community structure and environmental parameters measured. Approximately 3.2 million 16S rRNA gene sequences were retrieved from a total of 58 samples. Microbial community analyses showed significant reductions in species richness as well as evenness in sites with Marcellus shale activity. Beta diversity analyses revealed distinct microbial community structure between sites with and without Marcellus shale activity. For example, operational taxonomic units (OTUs) within the Acetobacteracea, Methylocystaceae, Acidobacteriaceae, and Phenylobacterium were greater than three log-fold more abundant in MSA+ sites as compared to MSA- sites. Further, several of these OTUs were strongly negatively correlated with pH and positively correlated with the number of wellpads in a watershed. It should be noted that many of the OTUs enriched in MSA+ sites are putative acidophilic and/or methanotrophic populations. This study revealed apparent shifts in the autochthonous microbial communities and highlighted potential members that could be responding to changing stream conditions as a result of nascent industrial activity in these aquatic ecosystems. PMID:25408683

  9. Assessing impacts of unconventional natural gas extraction on microbial communities in headwater stream ecosystems in Northwestern Pennsylvania

    PubMed Central

    Trexler, Ryan; Solomon, Caroline; Brislawn, Colin J.; Wright, Justin R.; Rosenberger, Abigail; McClure, Erin E.; Grube, Alyssa M.; Peterson, Mark P.; Keddache, Mehdi; Mason, Olivia U.; Hazen, Terry C.; Grant, Christopher J.; Lamendella, Regina

    2014-01-01

    Hydraulic fracturing and horizontal drilling have increased dramatically in Pennsylvania Marcellus shale formations, however the potential for major environmental impacts are still incompletely understood. High-throughput sequencing of the 16S rRNA gene was performed to characterize the microbial community structure of water, sediment, bryophyte, and biofilm samples from 26 headwater stream sites in northwestern Pennsylvania with different histories of fracking activity within Marcellus shale formations. Further, we describe the relationship between microbial community structure and environmental parameters measured. Approximately 3.2 million 16S rRNA gene sequences were retrieved from a total of 58 samples. Microbial community analyses showed significant reductions in species richness as well as evenness in sites with Marcellus shale activity. Beta diversity analyses revealed distinct microbial community structure between sites with and without Marcellus shale activity. For example, operational taxonomic units (OTUs) within the Acetobacteracea, Methylocystaceae, Acidobacteriaceae, and Phenylobacterium were greater than three log-fold more abundant in MSA+ sites as compared to MSA? sites. Further, several of these OTUs were strongly negatively correlated with pH and positively correlated with the number of wellpads in a watershed. It should be noted that many of the OTUs enriched in MSA+ sites are putative acidophilic and/or methanotrophic populations. This study revealed apparent shifts in the autochthonous microbial communities and highlighted potential members that could be responding to changing stream conditions as a result of nascent industrial activity in these aquatic ecosystems. PMID:25408683

  10. Caribbean basin framework, 4: Maracaibo basin, northwestern Venezuela

    SciTech Connect

    Lugo, J. (Univ. of Texas, Austin (United States))

    1991-03-01

    The Maracaibo basin is presently located in a topographic depression on the Maracaibo block, a triangular, fault-bounded block within the Caribbean-South America plate boundary of northwestern Venezuela. Intense oil exploration over the last 50 years has produced a large amount of seismic and well data that can be used to constrain four Jurassic to Recent tectonic and depositional events that affected the region: (1). Late Jurassic rift phase and subsidence along normal faults striking north-northeast across the floor of the basin; (2) Cretaceous to early Eocene subsidence recorded by shallow to deep marine carbonate and clastic rocks that thicken from south to north and completely cover Permian rocks of the Merida arch; (3) Eocene folding, thrusting, and initial reactivation of Jurassic normal faults as convergent strike-slip and reverse faults. Eocene clastic sediments are thickest in a narrow northwest-trending foredeep on the northeastern margin of the basin; (4) Late Miocene to Recent northwest-southeast convergence is marked by continued reactivation of Jurassic normal faults as reverse and left-lateral strike-slip faults, uplift of mountain ranges bordering the basin, and deposition of up to 10 km of clastic sediment.

  11. Tritium Concentration in Rainwater Samples in Northwestern Greece

    SciTech Connect

    Stamoulis, K.; Ioannides, K.; Kassomenos, P.; Vlachogianni, A. [University of Ioannina (Greece)

    2005-07-15

    Tritium is an isotope of hydrogen, produced in the upper level of the atmosphere. It enters the water cycle after its oxidation and through the precipitation. The measurement of tritium concentration in rainwater is of great importance because it can be used for hydrology investigations such as the recharge mode or the vulnerability of aquifers.For this purpose, rainwater samples were collected for a period of 16 months from October 2002 to January 2004 from a sampling station at Ioannina, northwestern Greece. Each sample was filtered and measured without any further treatment for tritium activity, using a super low-level background, liquid scintillation analyzer. Five mL of the sample were mixed with 15 mL of scintillation cocktail, specially designed for low-level tritium measurements and its beta activity was measured for 500 min.Results show that during the sampling period, the tritium concentration varied up to two fold, increasing during the spring and summer months. The measured tritium concentrations in rainwater, which ranged from 9 {+-} 4 to 23 {+-} 5 TU, can be used for local hydrology studies.

  12. Geomorphic surfaces in the northwestern Klamath Mountains, California and Oregon

    SciTech Connect

    Baldwin, K.S. (Forest Service, Happy Camp, CA (United States)); Ricks, C.L. (Forest Service, Gold Beach, OR (United States))

    1993-04-01

    Thick, residual, colluvial and alluvial soils derived from ophiolitic rocks mantle at least four geomorphic surfaces in the Siskiyou and marble mountains, in northwestern California and Illinois Valley, in southwestern Oregon. Analysis of digital elevation data provides constraints on the distribution and origin of these surfaces. Because of the geomorphic expression and soil mechanical properties of the surfaces, a map of slope gradients less than 22 degrees closely approximates the distribution of geomorphic surfaces as they are known from field observations. Preliminary definition of individual surfaces is based upon classification of the slop-map by elevation ranges. The Klamath Peneplain'' of Diller (1902) and associated soils, recently referred to as Klamath Saprolite'', are recognized near summit elevation (1,500 meters) across the area. Regional uplift and erosion has resulted in extensive, large earthflow landslides derived from these soils. Alluvial and residual deposits on the floor of the Illinois Valley occur at the same elevation (300 meters) as incised alluvial and colluvial terrace deposits along the Klamath River and tributary streams. At least two additional surfaces have been identified in the Siskiyou and Marble Mountains at approximately elevation 750 and 1,000 meters. Analysis of digital elevation data, combined with the map of earthflow landslides, allows rapid preliminary mapping of geomorphic surfaces in this terrain.

  13. Deglaciation of the northwestern White Mountains, New Hampshire

    USGS Publications Warehouse

    Thompson, W.B.; Fowler, B.K.; Dorion, C.C.

    1999-01-01

    The mode of deglaciation in the northwestern White Mountains of New Hampshire has been controversial since the mid 1800's. Early workers believed that active ice deposited the Bethlehem Moraine complex in the Ammonoosuc River basin during recession of the last ice sheet. In the 1930's this deglaciation model was replaced by the concept of widespread simultaneous stagnation and downwastage of Late Wisconsinan ice. The present authors reexamined the Bethlehem Moraine complex and support the original interpretation of a series of moraines deposited by active ice. We found other moraine clusters of similar age to the northeast in the Johns River and Israel River basins. Ice-marginal deposits that probably correlate with the Bethlehem Moraine also occur west of Littleton. The Bethlehem Moraine complex and equivalent deposits in adjacent areas were formed by readvance and oscillatory retreat of the Connecticut Valley lobe of the Laurentide Ice Sheet. This event is called the Littleton-Bethlehem Readvance. Throughout the study area, sequences of glaciolacustrine deposits and meltwater drainage channels indicate progressive northward recession of the glacier margin. Radiocarbon dates from nearby New England and Quebec suggest that the ice sheet withdrew from this part of the White Mountains between about 12,500 and 12,000 14C yr BP. We attribute the Littleton-Bethlehem Readvance to a brief climatic cooling during Older Dyas time, close to 12,000 BP.

  14. Northwestern University Schizophrenia Data and Software Tool (NUSDAST).

    PubMed

    Wang, Lei; Kogan, Alex; Cobia, Derin; Alpert, Kathryn; Kolasny, Anthony; Miller, Michael I; Marcus, Daniel

    2013-01-01

    The schizophrenia research community has invested substantial resources on collecting, managing and sharing large neuroimaging datasets. As part of this effort, our group has collected high resolution magnetic resonance (MR) datasets from individuals with schizophrenia, their non-psychotic siblings, healthy controls and their siblings. This effort has resulted in a growing resource, the Northwestern University Schizophrenia Data and Software Tool (NUSDAST), an NIH-funded data sharing project to stimulate new research. This resource resides on XNAT Central, and it contains neuroimaging (MR scans, landmarks and surface maps for deep subcortical structures, and FreeSurfer cortical parcellation and measurement data), cognitive (cognitive domain scores for crystallized intelligence, working memory, episodic memory, and executive function), clinical (demographic, sibling relationship, SAPS and SANS psychopathology), and genetic (20 polymorphisms) data, collected from more than 450 subjects, most with 2-year longitudinal follow-up. A neuroimaging mapping, analysis and visualization software tool, CAWorks, is also part of this resource. Moreover, in making our existing neuroimaging data along with the associated meta-data and computational tools publically accessible, we have established a web-based information retrieval portal that allows the user to efficiently search the collection. This research-ready dataset meaningfully combines neuroimaging data with other relevant information, and it can be used to help facilitate advancing neuroimaging research. It is our hope that this effort will help to overcome some of the commonly recognized technical barriers in advancing neuroimaging research such as lack of local organization and standard descriptions. PMID:24223551

  15. Prevalence of Whipple's disease in north-western Italy.

    PubMed

    Biagi, F; Balduzzi, D; Delvino, P; Schiepatti, A; Klersy, C; Corazza, G R

    2015-07-01

    Whipple's disease (WD) is a rare systemic infection due, in genetically susceptible individuals, to Tropheryma whipplei, a heterogeneous Gram-positive actinobacteria. Although it has already been recognised that WD affects mainly middle-aged Caucasian men, the prevalence of WD is virtually unknown. The annual incidence of WD in the general population is said to be less than 1 per 1,000,000, but scientific evidence for these figures is still lacking. On the basis of the number of patients recorded with a diagnosis of Whipple's disease in the regional registers for rare diseases of Lombardia, Liguria and Piemonte-Valle d'Aosta regions, we studied the prevalence of WD in the north-western part of Italy. Forty-six patients with Whipple's disease were recorded in these regions (13 females; mean age at diagnosis 52.1?±?11.1 years). Since 16,130,725 inhabitants live in these four regions, prevalence of WD in the general population is 3/10(6) and almost 30 % of the patients are females. WD is certainly a rare disease but it also affects women in a considerable proportion of cases. PMID:25804189

  16. Atherosclerotic risk factors in female students of northwestern Greece.

    PubMed

    Elisaf, M; Papanikolaou, N; Letzaris, G; Dimoliatis, J; Siamopoulos, K C

    1993-12-01

    The prevalence of predisposing atherosclerotic factors such as obesity, hypertension, hyperlipidaemia, smoking and consumption of animal fat in a cohort of all female students in the last class of high schools in Northwestern Greece was studied. A total of 590 students were included in the study. In all subjects body weight and height, SBP and DBP (in sitting position), total cholesterol and triglycerides (after 14 hours of fasting) were measured. Smoking and dietary habits were examined by a questionnaire. The results showed that 41.57% of the students were obese (Quetelet index > 22), 3.12% were considered as hypertensives (SBP > 140 mmHg and/or DBP > 90 mmHg), 14.19% had hypercholesterolaemia (total cholesterol > 5.439 mmol/l (210 mg/dl), 95th percentile in Greece), 4.7% had hypertriglyceridaemia (total triglycerides > 1.423 mmol/l (126 mg/dl) 95th percentile in Greece). Moreover, 22% consumed meat and 24% ate eggs at least four times per week. Only 13% of these students smoked habitually or occasionally. In conclusion, the prevalence of hyperlipidaemia and obesity in our cohort is significantly high and is correlated with nutritional factors. The detection of predisposing atherosclerotic factors in adolescents is of primary importance for early prevention of vascular damage. PMID:8114041

  17. Antimicrobial activity of Northwestern Mexican plants against Helicobacter pylori.

    PubMed

    Robles-Zepeda, Ramón E; Velázquez-Contreras, Carlos A; Garibay-Escobar, Adriana; Gálvez-Ruiz, Juan C; Ruiz-Bustos, Eduardo

    2011-10-01

    Helicobacter pylori is the major etiologic agent of such gastric disorders as chronic active gastritis and gastric carcinoma. Over the past few years, the appearance of antibiotic-resistant bacteria has led to the development of better treatments, such as the use of natural products. This study evaluated the anti-H. pylori activity of 17 Mexican plants used mainly in the northwestern part of Mexico (Sonora) for the empirical treatment of gastrointestinal disorders. The anti-H. pylori activity of methanolic extracts of the plants was determined by using the broth microdilution method. The 50% minimum inhibitory concentrations ranged from less than 200 to 400 ?g/mL for Castella tortuosa, Amphipterygium adstringens, Ibervillea sonorae, Pscalium decompositum, Krameria erecta, Selaginella lepidophylla, Pimpinella anisum, Marrubium vulgare, Ambrosia confertiflora, and Couterea latiflora and were greater than 800??g/mL for Byophyllum pinnatum, Tecoma stans linnaeus, Kohleria deppena, Jatropha cuneata, Chenopodium ambrosoides, and Taxodium macronatum. Only Equisetum gigantum showed no activity against H. pylori. This study suggests the important role that these plants may have in the treatment of gastrointestinal disorders caused by H. pylori. The findings set the groundwork for further characterization and elucidation of the active compounds responsible for such activity. PMID:21663492

  18. The Library as Leader: Computer Assisted Information Services at Northwestern University. A Report of the NULCAIS Committee on the Present Status, and Proposals for the Future, of Computer Assisted Information Services at Northwestern University Library.

    ERIC Educational Resources Information Center

    Northwestern Univ., Evanston, IL. Univ. Libraries.

    In March 1974, a study was undertaken at Northwestern University to examine the role of the library in providing information services based on computerized data bases. After taking an inventory of existing data bases at Northwestern and in the greater Chicago area, a committee suggested ways to continue and expand the scope of information…

  19. Eurasian ice-sheet interaction in northwestern Russia throughout the late KURT H. KJR, EILIV LARSEN, SVEND FUNDER, IGOR N. DEMIDOV, MARIA JENSEN, LENA HA KANSSON AND

    E-print Network

    Ingólfsson, Ólafur

    U N C O R R EC TED PR O O F Eurasian ice-sheet interaction in northwestern Russia throughout°kansson, L. & Murray, A. 2006 (August): Eurasian ice-sheet interaction in northwestern Russia throughout the Kanin Peninsula and Chyoshskaya Bay in northwestern Russia contain information on the marginal behaviour

  20. Experimental evidence that oral secretions of northwestern ring-necked snakes ( Diadophis punctatus occidentalis) are toxic to their prey

    Microsoft Academic Search

    Ryan P. O’Donnell; Kevin Staniland; Robert T. Mason

    2007-01-01

    Ring-necked snakes (Diadophis punctatus) are suspected of being venomous because their Duvernoy's gland secretions have high levels of phospholipase activity, which is characteristic of many viperid and elapid venoms, and because anecdotal reports of feeding behavior are consistent with the use of a venom. We tested the toxicity of northwestern ring-necked snake oral secretions to a natural prey species, northwestern

  1. Econometrics of Models with Strategic Interaction Presenter: Elie Tamer (Northwestern) Fee: HE delegates: 90; other delegates: 720

    E-print Network

    Saunders, Mark

    Econometrics of Models with Strategic Interaction Presenter: Elie Tamer (Northwestern) Fee: HE of the econometrics questions that arise when analyzing models with multiple decision makers interacting Models (joint with Northwestern and UCL)This is a free cemmap workshop organised by: Aureo de Paula

  2. Geology and geochemistry of the clastic sequences from Northwestern Panay (Philippines): Implications for provenance and geotectonic setting

    Microsoft Academic Search

    Jillian Aira S. Gabo; Carla B. Dimalanta; Mary Grace S. Asio; Karlo L. Queaño; Graciano P. Yumul Jr.; Akira Imai

    2009-01-01

    Whole-rock geochemical analysis of samples from the clastic sequences in Northwestern Panay revealed different compositional ranges for the Buruanga Peninsula and Antique Range. The results provide additional evidence that Northwestern Panay consists of two distinct terranes as a result of the arc-continent collision between the Palawan Microcontinental Block and the Philippine Mobile Belt. Major element compositions of clastic rocks from

  3. 2012 SetUp DirectDeposit Page1 NorthwesternUniversity CAESAR/SES Updated:10/25/2012

    E-print Network

    Shahriar, Selim

    ©2012 SetUp DirectDeposit Page1 NorthwesternUniversity CAESAR/SES Updated:10/25/2012 SES/CAESAR v Number field. Enter "1234". #12;©2012 SetUp DirectDeposit Page3 NorthwesternUniversity CAESAR/SES Updated

  4. GROWTH OF PACIFIC SAUR~ COWLABlS SAlRA, IN THE NORTHEASTERN AND NORTHWESTERN PACIFIC OCEANI

    E-print Network

    the northeastern and northwestern Pacific Ocean was studied using otolith growth increments. We found that growth, Cololabis saira (Brevoort), is distributed throughout the North Pacific Ocean and is one of the most the northwestern Pacific Ocean. Details of sampling and methods of reading otoliths are summarized in Table 1

  5. The Talara Basin province of northwestern Peru: cretaceous-tertiary total petroleum system

    USGS Publications Warehouse

    Higley, Debra K.

    2004-01-01

    More than 1.68 billion barrels of oil (BBO) and 340 billion cubic feet of gas (BCFG) have been produced from the Cretaceous-Tertiary Total Petroleum System in the Talara Basin province, northwestern Peru. Oil and minor gas fields are concentrated in the onshore northern third of the province. Current production is primarily oil, but there is excellent potential for offshore gas resources, which is a mostly untapped resource because of the limited local market for gas and because there are few pipelines. Estimated mean recoverable resources from undiscovered fields in the basin are 1.71 billion barrels of oil (BBO), 4.79 trillion cubic feet of gas (TCFG), and 255 million barrels of natural gas liquids (NGL). Of this total resource, 15 percent has been allocated to onshore and 85 percent to offshore; volumes are 0.26 BBO and 0.72 TCFG onshore, and 1.45 BBO and 4.08 TCFG offshore. The mean estimate of numbers of undiscovered oil and gas fields is 83 and 27, respectively. Minimum size of fields that were used in this analysis is 1 million barrels of oil equivalent and (or) 6 BCFG. The Paleocene Talara forearc basin is superimposed on a larger, Mesozoic and pre-Mesozoic basin. Producing formations, ranging in age from Pennsylvanian to Oligocene, are mainly Upper Cretaceous through Oligocene sandstones of fluvial, deltaic, and nearshore to deep-marine depositional origins. The primary reservoirs and greatest potential for future development are Eocene sandstones that include turbidites of the Talara and Salinas Groups. Additional production and undiscovered resources exist within Upper Cretaceous, Paleocene, and Oligocene formations. Pennsylvanian Amotape quartzites may be productive where fractured. Trap types in this block-faulted basin are mainly structural or a combination of structure and stratigraphy. Primary reservoir seals are interbedded and overlying marine shales. Most fields produce from multiple reservoirs, and production is reported commingled. For this reason, and also because geochemical data on oils and source rocks is very limited, Tertiary and Cretaceous production is grouped into one total petroleum system. The most likely source rocks are Tertiary marine shales, but some of the Cretaceous marine shales are also probable source rocks, and these would represent separate total petroleum systems. Geochemical data on one oil sample from Pennsylvanian rock indicates that it was probably also sourced from Tertiary shales.

  6. Late quaternary pollen records from the Kobuk and Noatak river drainages, northwestern Alaska

    NASA Astrophysics Data System (ADS)

    Anderson, Patricia M.

    1988-05-01

    Pollen diagrams from Joe and Niliq Lakes date to ca. 28,000 and 14,000 yr B.P., respectively. Mesic shurb tundra grew near Joe Lake ca. 28,000 to 26,000 yr B.P. with local Populus populations prior to ca. 27,000 yr B.P. Shrub communities decreased as climate changed with the onset of Itkillik II glaciation (25,000 to 11,500 yr B.P.), and graminoid-dominated tundra characterized vegetation ca. 18,500 to 13,500 yr B.P. Herb tundra was replaced by shrub Betula tundra near both sites ca. 13,500 yr B.P. with local expansion of Populus ca. 11,000 to 10,000 yr B.P. and Alnus ca. 9000 yr B.P. Mixed Picea glauca/P. mariana woodland was established near Joe Lake ca. 6000 yr B.P. These pollen records when combined with others from northern Alaska and northwestern Canada indicate (1) mesic tundra was more common in northwestern Alaska than in northeastern Alaska or northwestern Canada during the Duvanny Yar glacial interval (25,000 to 14,000 yr B.P.); (2) with deglaciation, shrub Betula expanded rapidly in northwestern Alaska but slowly in areas farther east; (3) an early postglacial thermal maximum occurred in northwestern Alaska but had only limited effect on vegetation; and (4) pollen patterns in northern Alaska and northwestern Canada suggest regional differences in late Quaternary climates.

  7. Late Eocene marine incursion in north-western South America

    Microsoft Academic Search

    C. Santos; C. Jaramillo; G. Bayona; M. Rueda; V. Torres

    2008-01-01

    During the late Eocene in the Colombian Subandean basins, one of the most important oil-bearing rocks of the country was deposited: the Mirador Formation. Palaeogeographical models have interpreted a typically fluvial environment for the lower Mirador Formation and marginal to marine environments for its upper layers. The potential of marine influence in the upper Mirador beds and the overlying lower

  8. Distribution of the Late-Quaternary deformation in Northwestern Himalaya

    NASA Astrophysics Data System (ADS)

    Vassallo, R.; Mugnier, J.-L.; Vignon, V.; Malik, M. A.; Jayangondaperumal, R.; Srivastava, P.; Jouanne, F.; Carcaillet, J.

    2015-02-01

    Three main Cenozoic thrusts at the front of Northwestern Himalaya have accommodated most of the India-Eurasia convergence across the belt over the last million years and produced the present relief. Their recent tectonic activity is poorly known because of the long period of inaccessibility of the Jammu and Kashmir state, and because the latest and only large earthquake recorded in the region occurred in 1555 AD. We show where the deformation is localized during the Late-Quaternary, and determine shortening rates across the structures by analyzing the geometry and chronology of geomorphic markers. The Main Boundary Thrust in this region ceased moving at least ?30 ka ago. On the contrary, the more external Medlicott-Wadia Thrust and Main Frontal Thrust, both merging at depth on the sub-flat detachment of the Main Himalayan Thrust, exhibit hectometric-scale deformations accumulated during the last thousands of years. The total shortening rate absorbed by these faults over the last 14-24 ka is between 13.2 and 27.2 mm/yr (11.2 ± 3.8 and 9.0 ± 3.2 mm /yr, respectively). Part of this deformation may be associated to the geometry of the Chenab reentrant, which could generate an extra oblique component. However, the lower bound of our shortening rates is consistent with previously determined geodetic rates. Active deformation on these structures follows an in-sequence/out-of-sequence pattern, with breaking of both ramps being possible for earthquakes triggered on the main detachment.

  9. Use of timesat to estimate phenological parameters in Northwestern Patagonia

    NASA Astrophysics Data System (ADS)

    Oddi, Facundo; Minotti, Priscilla; Ghermandi, Luciana; Lasaponara, Rosa

    2015-04-01

    Under a global change context, ecosystems are receiving high pressure and the ecology science play a key role for monitoring and assessment of natural resources. To achieve an effective resources management to develop an ecosystem functioning knowledge based on spatio-temporal perspective is useful. Satellite imagery periodically capture the spectral response of the earth and remote sensing have been widely utilized as classification and change detection tool making possible evaluate the intra and inter-annual plant dynamics. Vegetation spectral indices (e.g., NDVI) are particularly suitable to study spatio-temporal processes related to plant phenology and remote sensing specific software, such as TIMESAT, has been developed to carry out time series analysis of spectral indexes. We used TIMESAT software applied to series of 25 years of NDVI bi-monthly composites (240 images covering the period 1982-2006) from the NOAA-AVHRR sensor (8 x 8 km) to assessment plant pheonology over 900000 ha of shrubby-grasslands in the Northwestern of Patagonia, Argentina. The study area corresponds to a Mediterranean environment and is part of a gradient defined by a sharp drop west-east in the precipitation regime (600 mm to 280 mm). We fitted the temporal series of NDVI data to double logistic functions by least-squares methods evaluating three seasonality parameters: a) start of growing season, b) growing season length, c) NDVI seasonal integral. According to fitted models by TIMESAT, start average of growing season was the second half of September (± 10 days) with beginnings latest in the east (dryer areas). The average growing season length was 180 days (± 15 days) without a clear spatial trend. The NDVI seasonal integral showed a clear trend of decrease in west-east direction following the precipitation gradient. The temporal and spatial information allows revealing important patterns of ecological interest, which can be of great importance to environmental monitoring. In this work we also show as utilizing TIMESAT to characterize the plant phenology at regional scale.

  10. Mesozoic stratigraphy of northwestern Australian and northern Himalayan margins

    SciTech Connect

    Ogg, J.; Kopaskamerkel, D.C.

    1989-03-01

    The Mesozoic stratigraphies of the Himalayan margin, the Argo abyssal plain, and the Exmouth Plateau exhibit marked contrasts in their sedimentation histories. The sedimentary sequence on the northeastern Exmouth Plateau off Australia includes a Carnian to Rhaetian sequence of fluviodeltaic and marine clastics and carbonates, capped by a shallowing-upward sequence of platform carbonates overlain, with a major unconformity, by marine Aptian sediments deposited during rapid subsidence of the plateau. Argo abyssal plain basement is overlain by red-brown, bioturbated, inoceramid-rich quartzose claystones, bentonites, and quartz siltstones, dated by radiolarians and benthic foraminifera as lowest Cretaceous. This is overlain by red and green claystones and nannofossil chalks. The basal age indicates that sea-floor spreading began in the earliest Cretaceous, not Oxfordian as had been thought. In the Thakkola region of Nepal, uppermost Triassic through Lower Jurassic shelf and carbonate platform facies are capped by a ferruginous oolite deposit of latest Bathonian to earliest Callovian age. Sedimentation resumed in the middle Oxfordian with deposition of Berriasian( ) deep-water black organic-rich mud. Following a valanginian regression and progradation of terrigenous clastics, Aptian black shales were deposited. In geological studies of the northwestern Australian margin, the ubiquitous hiatus within the Callovian-Oxfordian has been termed the breakup unconformity. Existence of a similar-aged hiatus in the Himalayas on a margin which formed during the late Paleozoic, absence of any Jurassic on the Exmouth Plateau, and the apparent initiation of spreading in the Argo basin during the earliest Cretaceous suggest that this widespread unconformity is not associated with a continental breakup in these regions.

  11. A soil catena on schist in northwestern California

    USGS Publications Warehouse

    Marron, D.C.; Popenoe, J.H.

    1986-01-01

    Soil characteristics in a small steepland watershed underlain by schist in a rainy, tectonically active area in northwestern California show close associations with drainage-basin position and slope characteristics. Five soil-topography units based on these associations are defined in the study watershed. Spatial relationships of soil series, and patterns of soil development as indicated by B-horizon clay content and redness, reflect interactions between pedogenesis and erosion. General soil-topography patterns include: (1) decreases in soil-development moving from low-order to higher-order stream vallyes; and (2) more developed soils on north-facing as opposed to south-facing slopes. Decreases in soil-profile development moving from slopes near low-order streams to slopes near higher-order streams approximately correlate with increases in gradient, vertical relief, and drainage density, and reflect a more vigorous stripping of regolith by erosion on the slopes near the higher-order streams. The larger percentage of area covered by the more developed soils on north-facing as opposed to south-facing slopes appears to reflect a contrast in the way dominant erosional processes interact with pedogenic processes. Roadcuts on middle and upper slopes show soil discontinuities indicative of disturbance by block slides or slumps or both. Roadcuts on lower slopes show disrupted soils in small bedrock hollows that could have been created by rapid, shallow landslides or by the pulled-up root wads of toppled trees. Soil-profile characteristics and soil-topography patterns in the study area demonstrate that both erosional and pedogenic processes need to be considered when interpreting characteristics of hillslope soils. ?? 1986.

  12. Hydrogeochemistry and simulated solute transport, Piceance Basin, northwestern Colorado

    USGS Publications Warehouse

    Robson, S.G.; Saulnier, G.J., Jr.

    1981-01-01

    Oil-shale mining activities in Piceance basin in northwestern Colorado could adversely affect the ground- and surface-water quality in the basin. This study of the hydrology and geochemistry of the area used ground-water solute-transport-modeling techniques to investigate the possible impact of the mines on water quality. Maps of the extent and structure of the aquifer were prepared and show that a saturated thickness of 2,000 feet occurs in the northeast part of the basin. Ground-water recharge in the upland areas in the east, south, and west parts of the basin moves down into deeper zones in the aquifer and laterally to the discharge areas along Piceance and Yellow Creeks. The saline zone and the unsaturated zone provide the majority of the dissolved solids found in the ground water. Precipitation, ion-exchange, and oxidation-reduction reactions are also occuring in the aquifer. Model simulations of ground-water pumpage in tracts C-a and C-b indicate that the altered direction of ground-water movement near the pumped mines will cause an improvement in ground-water quality near the mines and a degradation of water quality downgradient from the tracts. Model simulations of mine leaching in tract C-a and C-b indicate that equal rates of mine leaching in the tracts will produce much different effects on the water quality in the basin. Tract C-a, by virtue of its remote location from perennial streams, will primarily degrade the ground-water quality over a large area to the northeast of the tract. Tract C-b, by contrast, will primarily degrade the surface-water quality in Piceance Creek, with only localized effects on the ground-water quality. (USGS)

  13. Hydrogeochemistry and simulated solute transport, Piceance Basin, northwestern Colorado

    USGS Publications Warehouse

    Robson, Stanley G.; Saulnier, George J.

    1980-01-01

    Oil-shale mining activities in Piceance basin in northwestern Colorado could adversely affect the ground- and surface-water quality in the basin. This study of the hydrology and geochemistry of the area used groundwater solute-transport-modeling techniques to investigate the possible impact of the mines on water quality. Maps of the extent and structure of the aquifer were prepared and show that a saturated thickness of 2,000 feet occurs in the northeast part of the basin. Ground-water recharge in the upland areas in the east, south, and west parts of the basin moves down into deeper zones in the aquifer and laterally to the discharge areas along Piceance and Yellow Creeks. The saline zone and the unsaturated zone provide the majority of the dissolved solids found in the ground water. Precipitation, ion-exchange, and oxidation-reduction reactions are also occurring in the aquifer. Model simulations of groundwater pumpage in tracts C-a and C-b indicate that the altered direction of groundwater movement near the pumped mines will cause an improvement in groundwater quality near the mines and a degradation of water quality downgradient from the tracts. Model simulations of mine leaching in tract C-a and C-b indicate that equal rates of mine leaching in the tracts will produce much different effects on the water quality in the basin. Tract C-a, by virtue of its remote location from perennial streams, will primarily degrade the groundwater quality over a large area to the northeast of the tract. Tract C-b, by contrast, will primarily degrade the surface-water quality in Piceance Creek, with only localized effects on the groundwater quality. (USGS)

  14. Rabies surveillance in bats in Northwestern State of São Paulo.

    PubMed

    Casagrande, Daiene Karina Azevedo; Favaro, Ana Beatriz Botto de Barros da Cruz; de Carvalho, Cristiano; Picolo, Mileia Ricci; Hernandez, Janaína Camila Borges; Lot, Monique Serra; Albas, Avelino; Araújo, Danielle Bastos; André Pedro, Wagner; Queiroz, Luzia Helena

    2014-01-01

    Introduction Rabies is an important zoonosis that occurs in mammals, with bats acting as Lyssavirus reservoirs in urban, rural and natural areas. Rabies cases in bats have been recorded primarily in urban areas in Northwestern State of São Paulo since 1998. This study investigated the circulation of rabies virus by seeking to identify the virus in the brain in several species of bats in this region and by measuring rabies-virus neutralizing antibody levels in the hematophagous bat Desmodus rotundus. Methods From 2008 to 2012, 1,490 bat brain samples were sent to the Universidade Estadual Paulista (UNESP) Rabies Laboratory in Araçatuba, and 125 serum samples from vampire bats that were captured in this geographical region were analyzed. Results Rabies virus was detected in the brains of 26 (2%) of 1,314 non-hematophagous bats using the fluorescent antibody test (FAT) and the mouse inoculation test (MIT). None of the 176 hematophagous bat samples were positive for rabies virus when a virus detection test was utilized. Out of 125 vampire bat serum samples, 9 (7%) had levels of rabies virus neutralization antibodies (RVNAs) that were higher than 0.5IU/mL; 65% (81/125) had titers between 0.10IU/mL and 0.5IU/mL; and 28% (35/125) were negative for RVNAs using the simplified fluorescent inhibition microtest (SFIMT) in BHK21 cells. The observed positivity rate (1.7%) was higher than the average positivity rate of 1.3% that was previously found in this region. Conclusions The high percentage of vampire bats with neutralizing antibodies suggests that recent rabies virus exposure has occurred, indicating the necessity of surveillance measures in nearby regions that are at risk to avoid diffusion of the rabies virus and possible rabies occurrences. PMID:25626649

  15. Comparative phylogeography in marginal seas of the northwestern Pacific.

    PubMed

    Ni, Gang; Li, Qi; Kong, Lingfeng; Yu, Hong

    2014-02-01

    The maturation of marine phylogeography depends on integration of comparative information across different regions globally. The northwestern Pacific, characterized by unique tectonic setting, however, is still underrepresented. This study seeks to highlight its phylogeographical history based on the available population data, focusing on three seas: the East China Sea (ECS), the South China Sea (SCS) and the Sea of Japan (SOJ). We first conducted a literature survey to evaluate current research efforts and then reanalysed the population structure, historical demography and genealogy for two selections of studies (namely ‘the ECS category’ and ‘the multiple-sea category’) to elucidate the evolutionary processes within and across the seas, respectively. For the ECS category, the meta-analyses revealed most studies displayed a shallow phylogeny, indicating a single origin from the sea. Significant population structure was commonplace, particularly in molluck and crustacean studies, with proportions of 89% and 80%, respectively. Nearly all studies selected showed signals of population expansion: the times estimated were closely linked to a period of ~120-140 Kya rather than the last glacial maximum. For the latter category, divergent intraspecific lineages appeared among seas and overlapped in the adjacent regions, a pattern implying each sea had served as an independent refugium during glaciations. The genetic splits, however, were estimated to arise from separate events dating from late Miocene to middle Pleistocene. As phylogeography is still in its infancy in the region, more effort is needed to test and complement the general rules abstracted here. Finally, challenges and prospects were discussed to accelerate further research. PMID:24600706

  16. REVISION OF THE UPPER CRETACEOUS RUDISTS FROM NORTHWESTERN PERU

    E-print Network

    Paris-Sud XI, Université de

    , and in the Cenizo Formation, particularly in the up- per part of the latter. Figure 1. Location of the studied the Paleozoic basement. The Lower Member is made of transgressive facies bearing rounded bioclasts and oyster

  17. Distribution of cadmium, zinc, copper, and lead in soils of industrial northwestern Indiana

    Microsoft Academic Search

    W. P. Miller; W. W. McFee

    1983-01-01

    Five undisturbed locations of sandy Oakville and Plainfield soils under oak forest in the heavily industrialized region of northwestern Indiana were sampled at four depths, to assess the nature and extent of Cd, Zn, Cu, and Pb contamination. The litter layer and top 2.5 cm of soil at a site within 5 km of the center of the industrial complex

  18. Global Positioning System (GPS) estimates of crustal deformation in the Marmara Sea region, Northwestern Anatolia

    Microsoft Academic Search

    Christian Straub; Hans-Gert Kahle

    1994-01-01

    In the Marmara Sea region the relative motion between the Anatolian and Eurasian lithosphere has been measured by means of the modern techniques of space geodesy using the Global Positioning System (GPS). In order to resolve in detail the kinematic field within the active earthquake belts of Northwestern Anatolia, two GPS campaigns were carried out across a dense network consisting

  19. SALINITY AND SODICITY INTERACTIONS OF WEATHERED MINESOILS IN NORTHWESTERN NEW MEXICO AND NORTH EASTERN ARIZONA

    Microsoft Academic Search

    Brent Musslewhite; Song Jin

    2006-01-01

    Weathering characteristics of minesoils and rooting patterns of key shrub and grass species were evaluated at sites reclaimed for 6 to 14 years from three surface coal mine operations in northwestern New Mexico and northeastern Arizona. Non-weathered minesoils were grouped into 11 classifications based on electrical conductivity (EC) and sodium adsorption ratio (SAR). Comparisons of saturated paste extracts, from non-weathered

  20. Aspects of the ecology of coastal tundra raised beach ridges in Northwestern Ontario

    Microsoft Academic Search

    Douglas William Larson

    1975-01-01

    The structure of lichen dominated vegetation is described within a series of raised beach ridges found along the strip of coastal tundra in northwestern Ontario. The patterns of distribution of the most abundant species correlated with the topographic influences of individual beach ridges more than with the influences of the general developmental sequence of vegetation from the coast of Hudson

  1. HEALTH PROFESSIONS RECRUITMENT & EXPOSURE PROGRAM Northwestern University's Feinberg School of Medicine, Student National Medical Association

    E-print Network

    Chisholm, Rex L.

    HEALTH PROFESSIONS RECRUITMENT & EXPOSURE PROGRAM 2012 (HPREP) Northwestern University's Feinberg of medicine, as well as have minority healthcare students interact with them on a regular basis. HRPEP by healthcare students · Information on different health professions and fields of medicine This program

  2. HEALTH PROFESSIONS RECRUITMENT & EXPOSURE PROGRAM Northwestern University's Feinberg School of Medicine, Student National Medical Association

    E-print Network

    Chisholm, Rex L.

    HEALTH PROFESSIONS RECRUITMENT & EXPOSURE PROGRAM 2013 (HPREP) Northwestern University's Feinberg of medicine, as well as have minority healthcare students interact with them on a regular basis. HRPEP by healthcare students Information on different health professions and fields of medicine This program

  3. HEALTH PROFESSIONS RECRUITMENT & EXPOSURE PROGRAM Northwestern University's Feinberg School of Medicine, Student National Medical Association

    E-print Network

    Chisholm, Rex L.

    HEALTH PROFESSIONS RECRUITMENT & EXPOSURE PROGRAM 2014 (HPREP) Northwestern University's Feinberg of medicine, as well as have minority healthcare students interact with them on a regular basis. HRPEP by healthcare students Information on different health professions and fields of medicine This program

  4. Evidence for bimodal hybrid zones between two species of char (Pisces: Salvelinus) in northwestern North America

    Microsoft Academic Search

    Z. Redenbach; E. B. Taylor

    2003-01-01

    Dolly Varden (Salvelinus malma, Pisces: Salmonidae) and bull trout (Salvelinus confluentus) have widely overlapping, but largely parapatric ranges in water- sheds in northwestern North America from Washington State to northern British Columbia. Genetic analysis of natural populations using diagnostic molecular markers revealed widespread local sympatry and hybridization with hybrids comprising 0-25% of the local samples. In a detailed analysis of

  5. GENETIC STRUCTURE OF SENSITIVE AND ENDANGERED NORTHWESTERN BADGER POPULATIONS (TAXIDEA TAXUS TAXUS AND T. T. JEFFERSONII)

    Microsoft Academic Search

    Christopher J. Kyle; Richard D. Weir; Nancy J. Newhouse; Helen Davis; Curtis Strobeck

    2004-01-01

    American badgers (Taxidea taxus) are semifossorial carnivores present in many arid regions of central and western North America. Negative demographic trends have prompted recent discussion concerning their conservation status in the northwestern portion of their range. As such, further information regarding the metapopulation structure of this species and factors affecting dispersal is needed. To provide a preliminary assessment of genetic

  6. GUIDELINES FOR THE OPERATION OF THE NORTHWESTERN UNIVERSITY FACULTY OMBUDSMAN PROGRAM

    E-print Network

    Program; 5. To the extent funding is available, provide for appropriate training of the Ombudspersons for serving in the role of ombudsperson; 6. Establish a standing subcommittee to accomplish the foregoing the subcommittee deems warranted. II. Purposes of the Northwestern University Faculty Ombudsman Program

  7. This article was downloaded by: [Northwestern University] On: 28 November 2011, At: 13:05

    E-print Network

    Reber, Paul J.

    ://www.tandfonline.com/loi/hlld20 Grammatical Form and Semantic Context in Verb Learning Sudha Arunachalam a & Sandra R. Waxman Arunachalam & Sandra R. Waxman (2011): Grammatical Form and Semantic Context in Verb Learning, Language Learning Sudha Arunachalam and Sandra R. Waxman Department of Psychology, Northwestern University Decades

  8. Effects of partial cutting on the ectomycorrhizae of Picea glauca forests in northwestern Alberta

    E-print Network

    Macdonald, Ellen

    Lance W. Lazaruk, Gavin Kernaghan, S. Ellen Macdonald, and Damase Khasa Abstract: This study assessed) on ectomycorrhizae (ECM) associated with white spruce (Picea glauca (Moench) Voss) in northwestern Alberta, Canada. The percentage of active white spruce root tips and ECM richness and diversity, as observed in soil cores

  9. Identifying changing climate responses of boreal forest trees in northwestern Canada

    E-print Network

    Feigon, Brooke

    to examine the extent to which apparent divergence of Picea glauca growth in northwestern boreal Canada may of this ongoing research. [1]. Picea glauca growth has an ubiquitous response to summer moisture balance Acknowledgments Tree-ring processing Introduction A network of 32 tree-ring width sites of Picea glauca located

  10. Northwestern University 5/2011 Transcript Review for K-12 Art Certification

    E-print Network

    Shahriar, Selim

    __________ ART 231-0 Relief Printmaking or ART 232-0 Intaglio Printmaking __________ ART 210-0 Digital Tools for Artists or ART 310 Digital Art __________ ART 240-0 Intermediate Sculpture or ART 250 IntermediateNorthwestern University 5/2011 Transcript Review for K-12 Art Certification No course below a "C

  11. SOURCE CHARACTERISTICS OF HYPOTHETICAL SUBDUCTION EARTHQUAKES IN THE NORTHWESTERN UNITED STATES

    Microsoft Academic Search

    THOMAS H. HEATON; STEPHEN H. HARTZELL

    1986-01-01

    Historic earthquake sequences on subduction zones that are similar to the Cascadia subduction zone are used to hypothesize the nature of shallow sub- duction earthquakes that might occur in the northwestern United States. Based on systematic comparisons of several physical characteristics, including phy- siography and seismicity, subduction zones that are deemed most similar to the Cascadia subduction zone are those

  12. NORTHWESTERN UNIVERSITY Tribological Interfaces Studied by an Analytical Dislocation Model and

    E-print Network

    Shull, Kenneth R.

    NORTHWESTERN UNIVERSITY Tribological Interfaces Studied by an Analytical Dislocation Model and In;3 ABSTRACT Tribological Interfaces Studied by an Analytical Dislocation Model and In-situ Transmission the classic "buried interface" problem in tribological research. Direct observa- tions of the sliding behavior

  13. Effects of Oligo-Miocene global climate changes on mammalian species richness in the northwestern

    E-print Network

    California at Berkeley, University of

    Effects of Oligo-Miocene global climate changes on mammalian species richness in the northwestern million years old (late Oligocene through late Miocene) for three geographic regions in the USA between all three biogeographic provinces. This peak coincides with the Mid-Miocene Climatic Optimum

  14. HEAVY METALS IN ROCKS AND STREAM SEDIMENTS FROM THE NORTHWESTERN PART OF BAJA CALIFORNIA, MEXICO

    Microsoft Academic Search

    Leticia ROSALES HOZ; Arturo CARRANZA EDWARDS; Susana SANTIAGO PEREZ

    In order to assess the amount of heavy metals apported by natural weathering to the coastal area of the northwestern part of Baja California, México, rocks from outcrops, rock fragments and sediments from the Guadalupe River and other streams that drain towards this area were studied. Major elements (Si, Al, Na, K, Ca, Mg, P, Fe, Mn and Ti) and

  15. Searching for an oxygenation event in the fossiliferous Ediacaran of northwestern Canada

    E-print Network

    Keywords: Oxygen Ediacaran Animals Biogeochemistry Shuram Late Neoproterozoic (Ediacaran) strata fromSearching for an oxygenation event in the fossiliferous Ediacaran of northwestern Canada D for the study of early animal life, with the ensuing suggestion that this temporal interval captures a gross

  16. DISTRIBUTION OF NATURALIZED CARDUUS NUTANS (COMPOSITAE) MAPPED IN RELATION TO GEOLOGY IN NORTHWESTERN OHIO12

    Microsoft Academic Search

    RONALD L. STUCKEY; JANE L. FORSYTH

    Within recent years the nodding thistle or musk thistle (Carduus nutans L.) has be- come naturalized and abundant in northwestern Ohio in at least two areas, the Castalia- Bellevue-Sandusky area and the Carey area. In the summers of 1967 and 1968, the total detailed distribution of Carduus nutans in these two areas was mapped by noting its occur- rence and

  17. Northwestern Wyoming's Country Schools. Country School Legacy: Humanities on the Frontier.

    ERIC Educational Resources Information Center

    Barthell, Robert J.

    The history of rural education in northwestern Wyoming and the accompanying bibliography of unpublished manuscripts, periodicals, school records, and oral histories comprise part of an eight-state research effort, Country School Legacy, to study the role rural schools have played in the history of the frontier and to locate and preserve…

  18. Tips and Tricks for FAMIS Web 11/14/2012, FAMIS, vlr 2012 Northwestern University

    E-print Network

    Shull, Kenneth R.

    Tips and Tricks for FAMIS Web FAMIS 11/14/2012, FAMIS, vlr © 2012 Northwestern University job aid Page 1 of 2 Here are some tips and tricks to help you use the FAMIS Web for service requests. Best have an "*" next to them on the page. Requestor Name Building Request Type Crew Maintenance Type

  19. A chronostratigraphic framework for the northwestern slope of the gulf of mexico

    E-print Network

    Elston, Kristen Eileen

    2007-04-25

    Sediments from two cores, JPC31 and JPC46, were analyzed to better understand the relationship between climate and sediment deposition on the continental slope of the northwestern Gulf of Mexico. These two cores were selected from a suite of cores...

  20. BREEDING BIOLOGY OF THE GREAT GRAY OWL IN SOUTHEASTERN IDAHO AND NORTHWESTERN WYOMING

    Microsoft Academic Search

    ALAN B. FRANKLIN

    In this study, I documented the existence of a breeding population of Great Gray Owls (Strix nebulosa) in southeastern Idaho and northwestern Wyoming and recorded aspects of this species' breeding biology between 1980 and 1983. Thirty-eight pairs were found; 25 fledged young at least once. Fifteen nests were documented; 40% in old stick nests and 60% on tops of broken-top

  1. Bedout: A Possible End-Permian Impact Crater Offshore of Northwestern Australia

    Microsoft Academic Search

    L. Becker; R. J. Poreda; A. R. Basu; K. O. Pope; T. M. Harrison; C. Nicholson; R. Iasky

    2004-01-01

    The Bedout High, located on the northwestern continental margin of Australia, has emerged as a prime candidate for an end-Permian impact structure. Seismic imaging, gravity data, and the identification of melt rocks and impact breccias from drill cores located on top of Bedout are consistent with the presence of a buried impact crater. The impact breccias contain nearly pure silica

  2. NORTHWESTERN UNIVERSITY System Design and Verification of the Precession Electron Diffraction Technique

    E-print Network

    Shull, Kenneth R.

    NORTHWESTERN UNIVERSITY System Design and Verification of the Precession Electron Diffraction the specimen is called DS (de-scan). In this chapter, precession electron diffraction patterns will be referred "DP's". 2.1. Precession Geometry Precession electron diffraction is in principle equivalent to the X

  3. Soil-plant diversity relationships on a disturbed site in northwestern Colorado

    Microsoft Academic Search

    J. M. Stark; E. F. Redente

    2008-01-01

    A 5-yr-old revegetation plot in the Piceance Basin of northwestern Colorado was used to study the relationship between several soil properties and plant species diversity. Soil properties, including coarse fragment content, topography, depth to bedrock, rooting depth, soil volume, fertility, and salt content, were quantified for 108 subplots. Using simple and multiple regression techniques, plant diversity on the subplots was

  4. Northwestern University Archives Evanston, Illinois Lodilla Ambrose (1865-1927) Papers, 1883-2001

    E-print Network

    two years in Europe before returning to the country and taking up residence with her brother in New that same year. Ambrose was an industrious student and active in extracurricular activities. She wrote for the Northwestern (the University's student newspaper) and the Chicago-based newspaper the Inter-Ocean, worked

  5. Production of carbonate particles by phytobenthic communities on the Mallorca-Menorca shelf, northwestern Mediterranean Sea

    Microsoft Academic Search

    M. Canals; E. Ballesteros

    1997-01-01

    In this paper the carbonate content and production, both at the species level and at the community level, is quantified in four areas of the Mallorca-Menorca shelf, northwestern Mediterranean Sea. Eight benthic communities are identified, each living at specific depth ranges and preferentially colonising either rocky or sedimented soft bottoms: (1) Photophilic algae, (2) Hemisciaphilic algae, (3) Coralligenous algal-dominated, (4)

  6. Climate downscaling for estimating glacier mass balances in northwestern North America: Validation with a USGS

    E-print Network

    Bhatt, Uma

    Climate downscaling for estimating glacier mass balances in northwestern North America: Validation] An atmosphere/glacier modeling system is described for estimating the mass balances of glaciers in both current to force a precipitation- temperature-area-altitude (PTAA) glacier mass balance model with daily maximum

  7. DEPARTMENT OF PHYSICAL THERAPY AND HUMAN MOVEMENT SCIENCES NORTHWESTERN UNIVERSITY FEINBERG SCHOOL OF MEDICINE

    E-print Network

    Contractor, Anis

    DEPARTMENT OF PHYSICAL THERAPY AND HUMAN MOVEMENT SCIENCES NORTHWESTERN UNIVERSITY FEINBERG SCHOOL OF MEDICINE Benefits for Physical Therapy Clinical Educators To recognize the contribution of clinical evidence. The Department of Physical Therapy and Human Movement Sciences (PTHMS) will reimburse the Center

  8. Distribution of clinically important thermophilic actinomycetes in vegetable substrates and soil in north-western India

    Microsoft Academic Search

    Madhurama Gangwar; Z. U. Khan; H. S. Randhawa; J. Lacey

    1989-01-01

    Medically important thermophilic actinomycetes were isolated from 218 (64%) of 341 samples of vegetable substrates and soil examined from sites in north-western India. Thermoactinomyces vulgaris (T. candidus) was the commonest species, occurring in 56% of samples, followed by Saccharomonospora viridis in 29%, Thermoactinomyces thalpophilus in 27%, Faenia rectivirgula (Micropolyspora faeni) in 21% and Thermoactinomyces sacchari in 14%. T. vulgaris and

  9. The Areal Pattern of Burned Tree Vegetation in the Subarctic Region of Northwestern Canada

    Microsoft Academic Search

    K. P. TIMONEY; ROSS W. WEIN

    1991-01-01

    Vegetation and terrain analyses of 1312 air photos spanning the subarctic, low arctic, and portions of the adjacent high boreal region of northwestern Canada permitted geographic characterization of the areal pattern of burned forest and forest-tundra vegetation. In terms of its lower areal extent of burns, and lower frequency of air photos showing burns, the forest-tundra is distinct from both

  10. Comparison of satellite and drifter surface flow estimates in the northwestern Gulf of Mexico

    Microsoft Academic Search

    Andrew C. Vastano; Charlie N. Barron

    1994-01-01

    A comparison of flow observations has been made with drifting buoys and infrared satellite images for northwestern Gulf of Mexico surface waters during the interval from 10 March to 23 April, 1989. Each drifter was drogued to a depth of 2.7 m and reported four-nine positions along its trajectory every 24 h through the NOAA satellite Argos data collection system.

  11. First Steps towards Grants Administration 02/04/2013, Grants, vlr 2013 Northwestern University

    E-print Network

    Shull, Kenneth R.

    First Steps towards Grants Administration Grants 02/04/2013, Grants, vlr © 2013 Northwestern University job aid Page 1 of 2 Here are some recommendations to get started on grants administration training classes and resources to continue to learn about and how to manage grants. The classes below will help you

  12. Time-varying parametric subharmonic instability from repeat CTD surveys in the northwestern Pacific Ocean

    E-print Network

    Qiu, Bo

    Time-varying parametric subharmonic instability from repeat CTD surveys in the northwestern Pacific are estimated using the fine-scale parameterization method from high-resolution CTD data along three repeat tidal current is found to lead the CTD-derived diffusivity time series by 6 days and can alter

  13. Review of Gizzard Shad Population Dynamics at the Northwestern Edge of Its Range

    Microsoft Academic Search

    Melissa R. Wuellne R; W. Willis

    Gizzard shad Dorosoma cepedianum is widely distributed in North America, and South Dakota marks the northwestern edge of its native range. To date, most research regarding population dynamics of gizzard shad has been con- ducted in more southerly waters. We reviewed the dynamics and biology of giz- zard shad populations in South Dakota and compared this information with that reported

  14. Feeding ecology of striped dolphins, Stenella coeruleoalba, in the north-western

    E-print Network

    Stockin, Karen

    Feeding ecology of striped dolphins, Stenella coeruleoalba, in the north-western Mediterranean Sea, Aberdeenshire, AB41 6AA UK The feeding ecology of striped dolphin, Stenella coeruleoalba, in the north measured in skin and muscle tissues of stranded and by-caught dolphins from six geographical areas

  15. The Phytophagous Insect Fauna of Scotch Thistle, Onopordum acanthium L., in Southeastern Washington and Northwestern Idaho

    Microsoft Academic Search

    J. D. WATTS; G. L. PIPER

    Scotch thistle, Onopordum acanthium L. (Asteraceae: Cardueae), a plant of Eurasian origin, has become an increasingly serious pasture, rangeland, wasteland, and roadside weed in the western United States. Prior to the implementation of a biological control agent acquisition and release program, a domestic survey was carried out at 16 sites in five southeastern Washington and northwestern Idaho counties between 1995-96

  16. INCIDENCE OF INTROGRESSION BETWEEN CULTIVATED ALFALFA AND WILD RELATIVES IN NORTHWESTERN KAZAKHSTAN.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Central Asia is considered the primary center of origin for alfalfa and has a rich diversity of taxa in the Medicago sativa Complex. An exploration was carried out in 2000 to collect germplasm of wild relatives of alfalfa in Northwestern Kazakhstan. Russian scientists had previously proposed areas w...

  17. River-induced particle distribution in the northwestern Black Sea (September 2002 and 2004)

    Microsoft Academic Search

    A. P. Karageorgis; V. H. Kourafalou; C. Anagnostou; K. P. Tsiaras; D. E. Raitsos; V. Papadopoulos; A. Papadopoulos

    2009-01-01

    Observations from two comprehensive oceanographic surveys on the northwestern Black Sea are analyzed to reveal the hydrological characteristics of the shelf area around the Danube delta in relation to particulate matter dynamics. These processes have broader implications on flows through the adjacent complex strait system. The surveys cover both a period of high (September 2002) and low (September 2004) discharge

  18. 2010 Murphy Society Student Funded Projects: MBECC 2011 Northwestern University Biomedical Engineering Society Student Chapter

    E-print Network

    MacIver, Malcolm A.

    powered cars. In order to continue to accomplish our mission, we must build a 6th car, which the community on the importance of clean water and #12;2 protecting the environment through educational outreach programs at local schools and town beautification activities. Northwestern Solar Car Team Rebecca

  19. Reproductive Ecology of Pseudemys floridana and Trachemys scripta (Testudines: Emydidae) in Northwestern Florida

    Microsoft Academic Search

    Matthew J. Aresco

    2004-01-01

    The Cooter, Pseudemys floridana, and the Pond Slider, Trachemys scripta, are two abundant freshwater turtles in the southeastern United States, but little is known of their reproductive ecology in northwestern Florida. I studied their nesting phenology and behavior, clutch size and frequency, rates of nest predation, and hatchling overwintering behavior from 2001-2003 at Lake Jackson, Leon County, Florida. Both species

  20. Natural History of a Relict Population of Topeka Shiner (Notropis topeka) in Northwestern Kansas

    Microsoft Academic Search

    William J. Stark; Jason S. Luginbill; Mark E. Eberle

    2002-01-01

    The Topeka shiner (Notropis topeka), an endemic minnow of the Great Plains, has been extirpated over much of its former range. The U.S. Fish and Wildlife Service listed it as an endangered species in January 1999. The only extant population of N. topeka remaining on the High Plains is located in northwestern Kansas. During 1999, we studied aspects of the

  1. TRANSPORTATION CENTER--NORTHWESTERN UNIVERSITY Aviation Symposium: The Future for Aviation

    E-print Network

    Bustamante, Fabián E.

    TRANSPORTATION CENTER--NORTHWESTERN UNIVERSITY Aviation Symposium: The Future for Aviation April The Transportation Center has organized a special Aviation Symposium focusing on important aviation industry topics, the symposium will present current perspectives across the full spectrum of aviation. Topics covered

  2. Domestic dogs and cats as sources of Trypanosoma cruzi infection in rural northwestern Argentina

    E-print Network

    Cohen, Joel E.

    -western Argentina. A total of 86 dogs and 38 cats was repeatedly examined for T. cruzi infection by serology andDomestic dogs and cats as sources of Trypanosoma cruzi infection in rural northwestern Argentina R. E. GU¨ RTLER1 *, M. C. CECERE1 , M. A. LAURICELLA2 , M. V. CARDINAL1 , U. KITRON3 and J. E. COHEN4 1

  3. A possible bedrock source for obsidian found in archeological sites in northwestern Alaska

    USGS Publications Warehouse

    Patton, W.W., Jr.; Miller, T.P.

    1970-01-01

    Recently discovered deposits of obsidian in the Koyukuk valley may be the long-sought-for source of obsidian found in archeological sites in northwestern Alaska. Obsidian from these deposits compares favorably in physical characteristics and sodium-manganese ratio with the archeological obsidian, and there is evidence that the deposits have been "mined" in the past.

  4. 77 FR 5585 - Northwestern Mutual Series Fund, Inc. and Mason Street Advisors, LLC; Notice of Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-03

    ...Northwestern Mutual Series Fund, Inc. and Mason...application under section 6(c) of the Investment...fact that the Applicant Series may invest a portion of...an order under section 6(c) of the Act for an...to allow the Applicant Series to invest in Other...

  5. Petroleum production platforms as sites for the expansion of ciguatera in the northwestern Gulf of Mexico

    Microsoft Academic Search

    T. A. Villareal; S. Hanson; Steve Qualia; E. L. E. Jester; H. R. Granade; R. W. Dickey

    2007-01-01

    Ciguatera is a common human disease of tropical, coral reef ecosystems acquired by consuming finfish-containing ciguatoxins (CTX). There are few records of this disease in the northwestern Gulf of Mexico, a region characterized by soft muddy bottoms that are considered poor habitat for the CTX source dinoflagellate Gambierdiscus toxicus. However, the approximately 4000 petroleum production platforms and hundreds of state-sponsored

  6. CenterPiece FALL 2007Research Scholarship, Collaboration, and Outreach at Northwestern University

    E-print Network

    Shahriar, Selim

    Solar energy: Northwestern and Argonne have the "ANSER" PLUS ­ News briefs, eIRB online, the Sleep Nanotechnology Star Chemist Sir Fraser Stoddart, credited with opening up new fields in chemistry, is leaving the University of California, Los Angeles and joining the chemistry faculty at North- western. Stoddart developed

  7. Last Interglacial marine environments in the White Sea region, northwestern Russia

    E-print Network

    Ingólfsson, Ólafur

    Last Interglacial marine environments in the White Sea region, northwestern Russia KARI GRØSFJELD., Seidenkrantz, M.-S. & Glaister, C. 2006 (August): Last Interglacial marine environments in the White Sea region passages to the White Sea. Local, low-saline, stratified basins developed and characterized the next five

  8. Relationship of Sea Surface Temperature Isotherm Patterns off Northwestern Mexico to the Catch of Striped Marlin,

    E-print Network

    Relationship of Sea Surface Temperature Isotherm Patterns off Northwestern Mexico to the Catch the distribution of striped marlin and sea surface temperature. Many researchers have reviewed the migration. SST Climatology vs. Striped Marlin Catch Uda (1957) provided a range of sea surface temperatures

  9. Stratigraphic and structural evolution of the Blue Nile Basin, Northwestern Ethiopian Plateau

    Microsoft Academic Search

    N. D. S. GANI; M. G. Abdelsalam; S. Gera; M. R. Gani

    2009-01-01

    The Blue Nile Basin, situated in the Northwestern Ethiopian Plateau, contains ? 1400 m thick Mesozoic sedimentary section underlain by Neoproterozoic basement rocks and overlain by Early-Late Oligocene and Quaternary volcanic rocks. This study outlines the stratigraphic and structural evolution of the Blue Nile Basin based on field and remote sensing studies along the Gorge of the Nile. The Blue

  10. Memory Consolidation: Systems K A Paller, Northwestern University, Evanston, IL, USA

    E-print Network

    Paller, Ken

    Memory Consolidation: Systems K A Paller, Northwestern University, Evanston, IL, USA ã 2009 Elsevier Ltd. All rights reserved. The Consolidation of a Memory At the moment when we perceive an event, the jour- ney of memory storage begins. In a sense, such an event may exist for many years before finally

  11. Controversies Regarding the Holocene Sea-Level History of the Northwestern Gulf of Mexico

    E-print Network

    California at Santa Barbara, University of

    Controversies Regarding the Holocene Sea-Level History of the Northwestern Gulf of Mexico Alex Mississippi Delta Gulf of Mexico Holocene Sea Levels Redfield, 1967 #12;Sea Level 2 Camps Continuous rise islands, deltas, etc. Glacio-Hydro-Isostatic Models Rheology wrong? Ice sheet ½ size of Greenland grew

  12. Historical trends of metal pollution recorded in the sediments of the Culiacan River Estuary, Northwestern Mexico

    E-print Network

    Long, Bernard

    - rioration of estuaries and neighboring coastal zone (Gerritse et al., 1998). Records of environmental change, Northwestern Mexico A.C. Ruiz-Ferna´ ndeza, *, C. Hillaire-Marcelb , F. Pa´ ez-Osunaa , B. Ghaleba , M. Soto´n, Sin., Mexico b Centre GEOTOP-UQA`M-McGill. Universite´ du Que´bec a` Montre´al. 201 President Kennedy

  13. NOTES ON THE GEOMORPHOLOGY AND LATE CENOZOIC GEOLOGY OF NORTHWESTERN CHIHUAHUA 1

    Microsoft Academic Search

    JOHN W. HAWLEY

    The geomorphology and late Cenozoic geology of a 71,500 square kilometer (27,600 square mile) area of northwestern Chihuahua and adjacent parts of Sonora, New Mexico and Texas are discussed. Emphasis is on description of three major physiographic units: The Sierra Madre Occidental, and two subsections of Mexican Basin and Range section. Formal names are proposed for the latter two subdivisions.

  14. Epibenthic invertebrates and fishes of the continental shelf of the northwestern Gulf of Mexico 

    E-print Network

    Al-Jabr, Abdulrahman Mohammad

    1995-01-01

    Data from 34 epibenthic trawls were made on the continental shelf of the northwestern Gulf of Mexico between depths 13 and 400 meters. These took 6,468 individuals belonging to 251 species of demersal fishes and invertebrates, with a mean number...

  15. WATER TABLE EFFECTS ON PHOSPHORUS RELEASE AND TRACE GAS FLUX IN A NORTHWESTERN MINNESOTA SHALLOW MARSH

    Technology Transfer Automated Retrieval System (TEKTRAN)

    A freshwater marsh, created by artificially draining a 105-ha shallow lake (Rice Lake), is a suspected source of phosphorus (P) to the Detroit Lake watershed, a major recreational destination for northwestern Minnesota. P loadings to the main drainage canal increase during the summer months, when th...

  16. CenterPieceResearch Scholarship, Collaboration, and Outreach at Northwestern University IN THIS ISSUE

    E-print Network

    Shahriar, Selim

    of Research Communications Kathleen P. Mandell, Senior Editor Amanda B. Morris, Publications Editor Beth, and enhances research at Northwestern University. Editors Joan T. Naper, Kathleen P. Mandell, Amanda B. Morris especially brighter green areas at the edges of the cells). This work has led to a novel class of potential

  17. Search for Service Requests in FAMIS Web 07/10/2013, FAMIS, vlr 2013 Northwestern University

    E-print Network

    Shull, Kenneth R.

    Search for Service Requests in FAMIS Web FAMIS 07/10/2013, FAMIS, vlr © 2013 Northwestern University job aid Page 1 of 2 You can use FAMIS Web as an alternative to quickly find service requests searches. Select Service Request Search Service Request Search Select filters and search. 1. Enter

  18. Northwestern University Financial Aid Satisfactory Academic Progress (SAP) Policy for Students Enrolled in

    E-print Network

    Shahriar, Selim

    1 Northwestern University Financial Aid Satisfactory Academic Progress (SAP) Policy for Students a review of courses attempted, pace toward graduation, and GPA. SAP Suspension Students who do not meet the terms of federal financial aid Satisfactory Academic Progress (SAP) will be subject to a SAP Suspension

  19. EGG PREDATION BY NORTHWESTERN CROWS: ITS ASSOCIATION WITH HUMAN AND BALD EAGLE ACTIVITY

    Microsoft Academic Search

    NICOLAAS A. M. VERBELK

    Predation by Northwestern Crows (Corvus caurinus) on the eggs of Double- crested Cormorants (Phalacrocorax auritus), Pelagic Cormorants (P. pelagicus), Glaucous- winged Gulls (Larus glaucescens), and Pigeon Guillemots (Cepphus columba) was studied in the summers of 1976-1980. Crows took eggs to specific sites on their territories where they ate them and where we counted the shells. In 1980, the crows took

  20. Forest fires, woodland caribou and land use policies in northwestern Ontario (Rangifer tarandus)

    Microsoft Academic Search

    Brian Frederick Kutas

    2004-01-01

    Woodland caribou (Rangifer tarandus caribou) are a threatened species in Ontario's boreal forest. Caribou require habitat that supports appropriate forage, including large areas of lichen rich forests. This research examines two dynamics that influence woodland caribou habitat in northwestern Ontario. These dynamics are forest fires and land use policies. The effects of forest fires are assessed quantitatively at both the

  1. Impacts of logging and wildfire on an upland black spruce community in northwestern Ontario

    Microsoft Academic Search

    M. H. Johnston; J. A. Elliott

    1996-01-01

    Plant species composition and community structure were compared among four sites in an upland black spruce community in northwestern Ontario. One site had remained undisturbed since the 1930s and three had been disturbed by either logging, fire, or both logging and fire. Canonical correspondence ordination analyses indicated that herbaceous species composition and abundance differed among the disturbance types while differences

  2. Secondary succession in disturbed and reclaimed sagebrush communities of northwestern Colorado

    Microsoft Academic Search

    Biondini

    1984-01-01

    The objective of this dissertation was the study of natural and induced secondary succession and soil biological activity in disturbed lands and reclaimed areas of a big sagebrush community (Artemisia tridentata) in northwestern Colorado. Four types of treatments were utilized to study soil disturbance effects in secondary succession: 1) vegetation was scraped off with as much topsoil left as possible,

  3. Deformation of Northwestern South America from GPS Geodesy

    NASA Astrophysics Data System (ADS)

    Mora-Paez, H.; La Femina, P. C.; Mothes, P. A.; Ruiz, A. G.; Fernandes, R. M.

    2013-12-01

    The North Andes block (NAB) is a hypothesized tectonic block that migrates (escapes) north-northeast relative to a stable South American reference frame. The motion of this block is thought-to-be derived by the collision of the Carnegie Ridge in southern Ecuador and/or by oblique convergence and high degrees of interplate coupling north of the ridge (i.e., strain partitioning). At the latitude of Ecuador, the NAB is defined by transpressional deformation accommodating east-northeastward motion along its boundary with South America. In southern to central Colombia, the NAB is dissected by several mapped and prominent regional shear zones. At these latitudes the NAB may be bound to the west by the Choco block and the transpressional Atrato-Uraba fault system and to the east by the Guayaquil-Algeciras fault system. And in northern Colombia the Caribbean - South America plate boundary is defined by the NAB and proposed Maracaibo and Guajira blocks. We investigate the deformation of northwestern South America, including the kinematics of NAB utilizing a new velocity field based on continuous GPS and existing episodic GPS data in Ecuador, Colombia, Venezuela and Panama. We reference these new velocities to a newly estimated Euler vector for the South America plate based on inversion of cGPS data from stations east of the Andes. The new velocity field and published earthquake slip vectors are inverted to solve for the Euler vectors of the NAB, Choco, Panama, Maracaibo and Guajira blocks and interseismic elastic strain accumulation (interseismic coupling) on block-bounding faults using a block modeling approach. We test a suite of block models to investigate the tectonic nature of the NAB along strike and the style of faulting in the upper plate accommodating block motion. Through the estimation of elastic strain accumulation on all block-bounding faults, we improve the understanding of interseismic coupling along a convergent margin capable of producing M>8 earthquakes and faults in the upper plate capable of generating M>6 earthquakes.

  4. Molecular identification of Theileria parasites of northwestern Chinese Cervidae

    PubMed Central

    2014-01-01

    Background Theileria and Babesia protozoan parasites are transmitted mainly by tick vectors. These parasites cause heavy economic losses to the live-stock industry, as well as affecting the health of wild animals in parasite-endemic areas. Identification of infectious agents in wild animals is not only crucial for species preservation, but also provides valuable information on parasite epidemiology. Here, we conducted a molecular surveillance study in Northwestern China to assess the prevalence of blood pathogens in cervids. Methods PCR analysis and microscopic evaluation of blood smears to detect Theileria- and Babesia-related diseases in Cervidae were conducted, in which 22 blood samples from red deer (n?=?22) in Qilian Mountain and 20 from sika deer (n?=?20) in Long Mountain were collected and tested for the presence of Theileria and Babesia. The 18S rRNA gene was amplified, and selected polymerase chain reaction (PCR)-positive samples were sequenced for species identification. Results PCR revealed that 9.1% of the Qilian Mountain samples and 20% of the Long Mountain samples were positive for Theileria uilenbergi; 90.09% of the Qilian Mountain samples (n?=?22) were positive for T. capreoli, but all of the Long Mountain samples (n?=?20) were negative for T. capreoli; no other Theileria or Babesia species were found. PCR showed that T. uilenbergi and T. capreoli were present in red deer in Qilian Mountain, while only T. uilenbergi was found in sika Deer in Long Mountain. The 18S rRNA gene sequences were aligned against the corresponding GenBank sequences of known isolates of Theileria and Babesia and subjected to phylogenetic analysis. The phylogenetic tree showed that the newly isolated Theileria spp. could be classified as belonging to two clades: one group belonged to the same clade as T. uilenbergi, the other to a clade containing T. capreoli. Conclusions Our results provide important data to increase understanding of the epidemiology of Cervidae theileriosis, and will assist with the implementation of measures to control theileriosis transmission to Cervidae and small ruminants in central China. PMID:24885179

  5. Palaeomagnetic evidence for unification of the North and West Australian cratons by ca.1.7Ga: new results from the Kimberley Basin of northwestern Australia

    NASA Astrophysics Data System (ADS)

    Li, Z. X.

    2000-07-01

    A palaeomagnetic study of the Elgee Formation red siltstones and shales in the Palaeoproterozoic Kimberley Basin of northwestern Australia has been carried out. All seven sampling sites revealed an extremely stable magnetic remanence carried by haematite. The age of the formation is confined by precise SHRIMP U-Pb ages of early diagenetic xenotime from rocks both above and below it to be 1704+7/-14Ma, but this may represent a minimum age. The youngest detrital zircon grains in the underlying formation provide a maximum age of 1786+/-14Ma for the formation. The extreme stability of the remanence, the dissimilarity of the remanent direction from expected younger palaeomagnetic directions, and the lack of regional overprint in the 1790+/-4Ma Hart Dolerite just north of the study region support a primary origin for the remanence. A marginally positive fold test also supports a primary origin. The mean direction of D=92.2°, I=14.9°, ?95=6.4° gives a palaeopole at 4.4°S, 210.0°E with dp=3.3°, dm=6.5°. This pole, a previously reported palaeopole from the Hart Dolerite and ca. 1700Ma overprint poles from the Pilbara Craton all agree with palaeopoles of similar ages from the McArthur Basin of northern Australia. Palaeomagnetic results thus suggest that the North and West Australian cratons were possibly joined together by approximately 1.7Ga.

  6. Characterization of Most Promising Sequestration Formations in the Rocky Mountain Region (RMCCS)

    SciTech Connect

    McPherson, Brian; Matthews, Vince

    2013-09-30

    The primary objective of the “Characterization of Most Promising Carbon Capture and Sequestration Formations in the Central Rocky Mountain Region” project, or RMCCS project, is to characterize the storage potential of the most promising geologic sequestration formations within the southwestern U.S. and the Central Rocky Mountain region in particular. The approach included an analysis of geologic sequestration formations under the Craig Power Station in northwestern Colorado, and application or extrapolation of those local-scale results to the broader region. A ten-step protocol for geologic carbon storage site characterization was a primary outcome of this project.

  7. Flooding of property by runoff from agricultural land in northwestern Europe

    NASA Astrophysics Data System (ADS)

    Boardman, John; Ligneau, Laurence; de Roo, Ad; Vandaele, Karel

    1994-08-01

    In the last twenty years there has been an increase in the incidence of flooding of property by runoff from agricultural land in many areas of northwestern Europe. These events take the form of inundations by soil-laden water associated with erision and the formation of ephemeral or talweg gullies developed in normally dry valley bottoms. Costs of such events may be considerable e.g. almost US$2M at Rottingdean, southern England, in 1987. These costs are largely borne by individual house occupants, insurance companies and local councils. The distribution of flooding is widespread but areas of high risk can be identified: the hilly area of central Belgium, parts of northern France, the South Downs in southern England and South-Limburg (the Netherlands). All these areas have silty, more or less loessial soils. Two types of flooding may be distinguished: winter flooding associated with wet soils and the cultivation of winter cereals, and summer flooding due to thunderstorm activity and runoff particularly from sugar beet, maize and potato crops. The distribution of these types of erosion varies in relation to the interaction between physical characteristics (soils and topography), climatic conditions and land use across the region. The reason for the recent increase in flooding events appears to be changes in land use, in the area of arable cropping, and the continued intensification of farming such as the use of chemical fertilizers, the decline in aggregate stability, the increase in the size of fields and compaction by farm vehicles. In some regions the risk of flooding has also increased because of expansion of urban areas in valley bottom locations. Communities have responded to the flooding hazard with emergency or protective measures usually involving engineered structures rather than land use change. The policy response to the increased risk of flooding has been very limited especially at the national and provincial level, the exception being plans developed with farming organisations in South-Limburg and the Pays de Caux. In southern England initiatives have been few and largely consist of protective measures undertaken by urban municipalities.

  8. High-frequency fluxes of labile compounds in the central Ligurian Sea, northwestern Mediterranean

    NASA Astrophysics Data System (ADS)

    Goutx, M.; Momzikoff, A.; Striby, L.; Andersen, V.; Marty, J. C.; Vescovali, I.

    2000-03-01

    Sinking particles were collected every 4 h with drifting sediment traps deployed at 200 m depth in May 1995 in a 1-D vertical system during the DYNAPROC observations in the northwestern Mediterranean sea. POC, proteins, glucosamine and lipid classes were used as indicators of the intensity and quality of the particle flux. The roles of day/night cycle and wind on the particle flux were examined. The transient regime of production from late spring bloom to pre-oligotrophy determined the flux intensity and quality. POC fluxes decreased from, on average, 34 to 11 mg m -2 d -1, representing 6-14% of the primary production under late spring bloom conditions to 1-2% under pre-oligotrophic conditions. Total protein and chloroplast lipid fluxes correlated with POC and reflected the input of algal biomass into the traps. As the season proceeded, changes in the biochemical composition of the exported material were observed. The C/N ratio rose from 7.8 to 12. Increases of serine (10-28% of total proteins), total lipids (7-9 to 14-28% of POC) and reserve lipids (1-5 to 5-22% of total lipids) were noticeable, whereas total protein content in POC decreased (20-27 to 18-7%). N-acetyl glucosamine, a tracer of fecal pellet flux, showed that zooplankton grazing was a major vector of downward export during the decaying bloom. Against this background pattern, episodic events specifically increased the flux, modifying the quality and the settling velocity of particles. Day/night signals in biotracers (POC, N-acetyl glucosamine, protein and chloroplast lipids) showed that zooplankton migrations were responsible for sedimentation of fresh material through fast sinking particles ( V=170-180 m d -1) at night. Periodic signatures of re-processed material (high lipolysis and bacterial biomass indices) suggested that other zooplankton fecal pellets or small aggregates, probably of lower settling velocities ( V<170 m d -1), contributed to the flux during calm periods. At the beginning of the experiment, during the development of a prymnesiophyte bloom in the upper layers, the sterol signal with no periodicity enabled us to estimate high particle settling velocities (?600 m d -1) likely related to large aggregate formation. A wind event increased biotracer fluxes (POC, protein, chloroplast lipids). The rapid transmission of surface signals through extremely fast sinking particles could be a general feature of particle fluxes in marine areas unaffected by horizontal advection.

  9. Sandstone petrography and evidences for provenance changes in Miaoli area from late Pliocene to early Pleistocene, northwestern Taiwan

    NASA Astrophysics Data System (ADS)

    Fu, Cheng-Wei; Yang, Kenn-Ming; Ting, Hsih-Hsiu; Yang, Chih-Cheng; Zhong, Kun-Wei

    2015-04-01

    The Miaoli area is located in the outer Western Foothills in the northwestern Taiwan, and between the Peikang Basement High and the Taihsi Basin. Based on the wellbore data, outcrop investigation, and petrofacies analysis of the sediments within the proximal to distal parts of the foreland basin in the Miaoli area, we revealed the evolutionary relationship between orogen and basin and the inference to the results from foreland basin on orogenic development of Taiwan. This work mainly composed of sedimentary facies analysis, sedimentary environments interpretations, and petrofacies analysis of sandstones. Upon aforementioned results, we discussed tectonic evolution of the orogenic belt and petrofacies variation of the sedimentary basin. The results contains two parts: 1) investigation of outcropped profiles from the outer Western Foothills to the Coastal Plain for reconstructing evolution of ancient sedimentary environments, and 2) petrofacies analysis of lithic debris of wellbores and sandstone samples in the field for revealing the variation of sediment sources between the proximal and distal parts of the foreland basin. Our research represented that 1) the foreland basin was in deeper sedimentary environment and the sediments derived from both the continental block and recycled orogen during depositing of the Chinshui Shale; 2) percentage of metamorphosed lithics increased in the proximal part of the basin during depositing of the Cholan Formation, indicating that sediments derived mainly from the orogenic belts, and the underfilled basin became to be overfilled; and 3) large amount of coarse sediments entered the basin during depositing of the Toukoshan Formation, sedimentary environments were from shore semi-closed shallow sea to terrestrial braided river, indicating that the Taiwan Orogen had been completely exposed.

  10. 33 CFR 165.1301 - Puget Sound and Adjacent Waters in Northwestern Washington-Regulated Navigation Area.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Puget Sound and Adjacent Waters in Northwestern Washington-Regulated...165.1301 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

  11. 33 CFR 165.1301 - Puget Sound and Adjacent Waters in Northwestern Washington-Regulated Navigation Area.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Puget Sound and Adjacent Waters in Northwestern Washington-Regulated...165.1301 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

  12. 33 CFR 165.1301 - Puget Sound and Adjacent Waters in Northwestern Washington-Regulated Navigation Area.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Puget Sound and Adjacent Waters in Northwestern Washington-Regulated...165.1301 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

  13. 33 CFR 165.1301 - Puget Sound and Adjacent Waters in Northwestern Washington-Regulated Navigation Area.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Puget Sound and Adjacent Waters in Northwestern Washington-Regulated...165.1301 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

  14. 33 CFR 165.1301 - Puget Sound and Adjacent Waters in Northwestern Washington-Regulated Navigation Area.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Puget Sound and Adjacent Waters in Northwestern Washington-Regulated...165.1301 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

  15. 75 FR 62519 - Northern Illinois Gas Company; Lee 8 Storage Partnership; NorthWestern Corporation; The East Ohio...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-12

    ...Consolidated)] Northern Illinois Gas Company; Lee 8 Storage Partnership; NorthWestern Corporation; The East Ohio Gas Company; UGI Central Penn Gas, Inc.; Arkansas Western Gas Company; Boston Gas Company; Notice of Baseline Filings October 4,...

  16. Northwestern University Archives Evanston, Illinois Melvin A. Pingree (1845-1866) Photograph Album, circa 1865-1866

    E-print Network

    secretary to James Harlan, then Andrew Johnson's Secretary of the Interior. Pingree died of yellow fever of typhoid fever on July 10, 1864, barely two months after enlisting. 6 Unknown Unmarked N/A #12;Northwestern

  17. Canopy storage capacity of xerophytic shrubs in Northwestern China

    NASA Astrophysics Data System (ADS)

    Wang, Xin-ping; Zhang, Ya-feng; Hu, Rui; Pan, Yan-xia; Berndtsson, Ronny

    2012-08-01

    SummaryThe capacity of shrub canopy water storage is a key factor in controlling the rainfall interception. Thus, it affects a variety of hydrological processes in water-limited arid desert ecosystems. Vast areas of revegetated desert ecosystems in Northwestern China are occupied by shrub and dwarf shrub communities. Yet, data are still scarce regarding their rainwater storage capacity. In this study, simulated rainfall tests were conducted in controlled conditions for three dominant xerophytic shrub types in the arid Tengger Desert. Eight rainfall intensities varying from 1.15 to 11.53 mm h-1 were used to determine the canopy water storage capacity. The simulated rainfall intensities were selected according to the long-term rainfall records in the study area. The results indicate that canopy storage capacity (expressed in water storage per leaf area, canopy projection area, biomass, and volume of shrub respectively) increased exponentially with increase in rainfall intensity for the selected shrubs. Linear relationships were found between canopy storage capacity and leaf area (LA) or leaf area index (LAI), although there was a striking difference in correlation between storage capacity and LA or LAI of Artemisia ordosica compared to Caragana korshinskii and Hedysarum scoparium. This is a result of differences in biometric characteristics, especially canopy morphology between the shrub species. Pearson correlation coefficient indicated that LA and dry biomass are better predictors as compared to canopy projection area and volume of samples for precise estimation of canopy water storage capacity. In terms of unit leaf area, mean storage capacity was 0.39 mm (range of 0.24-0.53 mm), 0.43 mm (range of 0.28-0.60 mm), and 0.61 mm (range of 0.29-0.89 mm) for C. korshinskii, H. scoparium, and A. ordosica, respectively. Correspondingly, divided per unit dry biomass, mean storage capacity was 0.51 g g-1 (range of 0.30-0.70 g g-1), 0.41 g g-1 (range of 0.26-0.57 g g-1), and 0.73 g g-1 (range of 0.38-1.05 g g-1) for C. korshinskii, H. scoparium, and A. ordosica, respectively, when the rainfall intensities ranged from 1.15, 2.31, 3.46, 4.61, 6.92, 9.23 to 11.53 mm h-1. The needle-leaved species A. ordosica had a higher canopy water storage capacity than the ovate-leaved species C. korshinskii and H. scoparium at the same magnitude of rainfall intensity, except for C. korshinskii when it was expressed in unit of canopy projection area. Consequently, A. ordosica will generate higher interception losses as compared to C. korshinskii and H. scoparium. This is especially the case as it often forms dense dwarf shrub communities despite its small size.

  18. Stable Isotopic Constraints of the Turpan Basin in Northwestern China

    NASA Astrophysics Data System (ADS)

    Schaen, A. J.

    2010-12-01

    Stable isotopic analysis of sedimentary rocks can be used to reconstruct past geologic changes in the elevation and climate of topographic features such as mountain ranges and plateaus. The Tibetan Plateau is an ideal field laboratory for conducting this type of study because of the Plateau’s extreme topographic relief and relatively recent geologic growth. Here we present oxygen and carbon isotope compositions from a suite of sedimentary rock samples taken from the western Turpan Basin in northwestern China. This area of the basin collects sediment from weathering and erosion of the Bogda Shan located to the north. The goal of this study is to analyze changes in the stable isotope composition as a function of stratigraphic position to reconstruct paleoelevations and paleoclimates in this part of the Tibetan Plateau. The sedimentary rock samples analyzed in this study are Late Jurassic to Neogene age and are primarily mudstone, siltstone, fine sandstone along with lesser limestone. Samples were powered and then dissolved with phosphoric acid at 72?C. The liberated CO2 gas was then analyzed using a Finnigan Delta Plus XL mass spectrometer with a gasbench inlet system. Oxygen isotope values range from -13.72 to -1.62‰ (PDB) and exhibit a large scale trend to more negative values toward the top of the stratigraphic sequence. Superimposed on this large scale trend are systematic variations in isotopic composition as a function of age. The most positive ?18O values occur at approximately 160, 115, 60, and 5 ma. Conversely, ?18O minima are observed at 150, 90, and 40 ma. ?13C values range from -10.69‰ to 1.40‰ (PDB). The most positive ?13C values (-4.3 to 1.4) occur from 120-160 ma. Younger samples display small scale variations with age with notable ?13C minima of -10.7, -14.7, and -7.6‰ at 108, 80, and 17 ma, respectively. The variable ?18O and positive ?13C values from the Jurassic (145-160 ma) are consistent with an arid climate and high atmospheric PCO2 levels during the warm Mesozoic Era. The overall decrease in ?18O values observed during the Cretaceous (145-65 ma) can be explained by the global climatic transition from a warm Mesozoic to a relatively cool Cenozoic Era. We take into account other possible influences on the isotopic record including detrital effects, diagensis, and evaporation, but infer the primary control on the isotopic records to be changes in climate during these time periods. Because the magnitude of oxygen isotope changes is consistent with that expected due to global climate change, we infer that there were not significant changes in the elevation of the Bogda Shan during this time period. This conclusion is also supported by the similar grain size/lithology (siltstone-finer grained sandstones) from bottom to top through the stratigraphic sequence, consistent with dormant topography prior to the Tertiary Period.

  19. Cenozoic orogenic phases in the northwestern framing of the Pacific

    NASA Astrophysics Data System (ADS)

    Gladenkov, Yu. B.

    2013-07-01

    Several Cenozoic orogenic phases marked by deformations and rearrangement of geological structures, by unconformities and hiatuses, and by the cyclicity of ancient sedimentary and volcanic formations are distinguished in the vast territory of a transitional zone between Northeast Asia and the Pacific, from Sakhalin in the south to Chukotka in the north.

  20. Life history and population dynamics of the banded drum, Larimus fasciatus, in the northwestern Gulf of Mexico 

    E-print Network

    Standard, Gary Wayne

    1983-01-01

    Drum, Larimus fasciatus, in the Northwestern Gulf of Mex'co. (May 1983) Gary Wayne Standard, B. S. , Texas ASM University Charrman of Advisory Committee: Dr. Mark E. Chittenden Jr. Larimus fasc, atus from the northwestern Gulf mature at 80-130 mm TL... and year when they hatched, e. g. , Fall80, following Shlossman and Chittenden (1981). Descriptions of spawning periodicity (beg'nnings and ends) using length frequencies assume the following size and age combinations p edicted from quadratic regression...

  1. Timing and extent of plio-pleistocene glaciations in north-western canada and east-central alaska

    Microsoft Academic Search

    Alejandra Duk-Rodkin; René W. Barendregt; Duane G. Froese; Florence Weber; Randy Enkin; I. Rod Smith; Grant D. Zazula; Pamela Waters; Rudy Klassen

    2004-01-01

    North-western Canada and eastern Alaska are recognised as having one of the oldest known continental glacial records (Late Pliocene) preserved in stratigraphical sections. These include the individual and complex records of Cordilleran, montane and continental glaciations. Regional scale glaciations (Cordilleran and continental) started in northwestern Canada and east-central Alaska between 2.9 and 2.6 million years ago. Overall, two Cordilleran glaciations

  2. 2012 View MyAccount Page1 NorthwesternUniversity CAESAR/SES Updated:10/25/2012

    E-print Network

    Shahriar, Selim

    ©2012 View MyAccount Page1 NorthwesternUniversity CAESAR/SES Updated:10/25/2012 SES/CAESAR v. 9 Financial Services > View My Account. #12;©2012 View MyAccount Page2 NorthwesternUniversity CAESAR/SESUniversity CAESAR/SES Updated:10/25/2012 Step 6 If you had any deposits that had not been applied toward your

  3. Galaxy Formation

    E-print Network

    Eric Gawiser

    2005-12-15

    I summarize current knowledge of galaxy formation with emphasis on the initial conditions provided by the Lambda CDM cosmology, integral constraints from cosmological quantities, and the demographics of high-redshift protogalaxies. Tables are provided summarizing the number density, star formation rate and stellar mass per object, cosmic star formation rate and stellar mass densities, clustering length and typical dark matter halo masses for Lyman break galaxies, Lyman alpha emitting galaxies, Distant red galaxies, Sub-millimeter galaxies, and Damped Lyman alpha absorption systems. I also discuss five key unsolved problems in galaxy formation and prognosticate advances that the near future will bring.

  4. Abundances of northwestern salamander larvae in montane lakes with and without fish, Mount Rainier National Park, Washington

    USGS Publications Warehouse

    Larson, Gary L.; Hoffman, Robert L.

    2002-01-01

    In Mount Rainier National Park, the northwestern salamander usually inhabits relatively large and deep lakes and ponds (average size = 0.3 ha; average depth > 2 m) that contain flocculent, organic bottom sediments and abundant coarse wood. Prior to 1970, salmonids were introduced into many of the park's lakes and ponds that were typical habitat of the northwestern salamander. The objective of this study was to compare, in lakes and ponds with suitable habitat characteristics for northwestern salamanders, the observed abundances of larvae in takes and ponds with and without these introduced salmonids. Day surveys of 61 lakes were conducted between 1993 and 1999. Fish were limited to takes and ponds deeper than 2 in. For the 48 lakes and ponds deeper than 2 in (i.e., 25 fishless lakes and 23 fish lakes), the mean and median observed abundances of northwestern salamander larvae in fishless lakes and ponds was significantly greater than the mean and median observed abundances of larvae in lakes and ponds with fish. Northwestern salamander larvae were not observed in 11 fish lakes. These lakes were similar in median elevation, surface area, and maximum depth to the fishless lakes. The 12 fish lakes with observed larvae were significantly lower in median elevation, larger in median surface area, and deeper in median maximum depth than the fishless lakes. Low to null observed abundances of northwestern salamander larvae in lakes and ponds with fish were attributed to a combination of fish predation of larvae and changes in larval behavior.

  5. Is There any Relationship Between the Santa Elena Depression and Chicxulub Impact Crater, Northwestern Yucatan Peninsula, Mexico?

    NASA Astrophysics Data System (ADS)

    Lefticariu, L.

    2005-05-01

    The Terminal Cretaceous Chicxulub Impact Crater had a strong control on the depositional and diagenetic history of the northern Yucatan Platform during most of the Cenozoic Era. The Chicxulub Sedimentary Basin (henceforth Basin), which approximately coincides with the impact crater, is circumscribed by a concentration of karstic sinkholes known as the Ring of Cenotes. Santa Elena Depression (henceforth Depression) is the name proposed for the bowl-shaped buried feature, first contoured by geophysical studies, immediately south of the Basin, in the area where the Ticul 1 and UNAM 5 wells were drilled. Lithologic, petrographic, and biostratigraphic data on PEMEX, UNAM, and ICDP cores show that: 1) Cenozoic deposits are much thicker inside the Basin than inside the Depression, 2) in general, the Cenozoic formations from inside the Depression are the thickest among those outside the Basin, 3) variably dolomitized pelagic or outer-platform wackestone or mudstone occur both inside the Basin and Depression, 4) the age of the deeper-water sedimentary carbonate rocks is Paleocene-Eocene inside the Basin and Paleocene?-Early Eocene inside the Depression, 5) the oldest formations that crop out are of Middle Eocene age at the edge of the Basin and Early-Middle Eocene age inside the Depression, 6) saline lake deposits, that consist chiefly of anhydrite, gypsum, and fine carbonate, and also contain quartz, chert, clay, zeolite, potassium feldspar, pyrite, and fragments of wood, are present in the Cenozoic section of the UNAM 5 core between 282 and 198 m below the present land surface, 7) the dolomite, subaerial exposure features (subaerial crusts, vugs, karst, dedolomite), and vug-filling cement from the Eocene formations are more abundant inside the Depression than inside the Basin. The depositional environments that are proposed for explaining the Cenozoic facies succession within the Santa Elena Depression are: 1) deeper marine water (Paleocene?-Early Eocene), 2) relatively isolated saline lake (Middle Eocene), and 3) shallow marine water (Middle-Late Eocene?). In places, the deeper-water facies are similar to those within the Chicxulub Sedimentary Basin. The shallow-water facies is similar to those occurring outside the Basin. In general, quartz and silicates are rare in the Cenozoic sedimentary carbonate of the northwestern Yucatan Peninsula. Therefore, their presence in the UNAM 5 core could be attributed to either impact breccia reworking or silicic volcanic processes. Quartz, chert, zeolite, and clay also are common in the suevite breccia of both Yax-1 and UNAM 5 cores. The fact that the Santa Elena Depression was a distinct sedimentary basin during much of the Paleogene could be explained by any or a combination of the following hypotheses: 1) In spite of being located outside the cenote ring, the Depression is a sub-basin of the larger and deeper Chicxulub Sedimentary Basin and is therefore located within the Chicxulub Impact Crater, 2) the Depression coincides with an impact crater distinct from the Chicxulub Impact Crater, 3) the Depression formed after the Chicxulub bolide impact due to slumping, crater wall failure, or larger-scale tectonic processes. The lack of conclusive evidence for multiple impact breccia layers in the northwestern Yucatan Peninsula, corroborated with the presence on top of the impact breccia from UNAM 5 core of deeper-water limestone similar to that of Late Paleocene-Early Eocene age from Yax-1 core, would be more consistent with either the first or third hypothesis.

  6. Soil Formation

    NSDL National Science Digital Library

    Humans use soil for their daily needs but do not sufficiently take account of its slow formation and fast loss. Discover the amazing geology of soil formation and the basic rock and soil types.Although soil seems the end product from weathering rocks, it is merely a stage in the gigantic cycle of mineral recycling by the movement of tectonic plates.

  7. Drop Formation

    NSDL National Science Digital Library

    This site from the University of Bristolâ??s Mathematics department contains an explanation of drop formation and its applications. A description of studies of drop separation and its applications in medicine and technology are provided. The site also contains photographs, including a series of images showing the formation of a satellite drop.

  8. PREFERENCE FORMATION

    Microsoft Academic Search

    James N. Druckman; Arthur Lupia

    2000-01-01

    ? Abstract This review concerns political preferences—what they are and where they come from. We begin by documenting the close relationship between processes of preference formation and change. Rather than suddenly appearing, most preferences emerge from interactions between individuals and their environment. This aspect of preference formation poses a concrete challenge: to uncover the mechanics of these interactions in important

  9. Allele frequencies for six miniSTR loci of Northwestern Chinese Han populations.

    PubMed

    Bai, Xue; Cong, Bin; Li, Shujin; Guo, Xia; Li, Xia; He, Lujun

    2009-11-01

    MiniSTR loci has demonstrated to be an effective approach to recover genetic information from degraded sample, due to the improved PCR efficiency of their reduced PCR product sizes. Allele frequencies and forensic parameters for the six miniSTR loci D10S1248, D2S441, D1S1677, D9S1122, D10S1435 and D17S1301 were investigated in 154 Northwestern Chinese Han populations. All loci showed a moderate degree of polymorphism with observed heterozygosity >0.6 and did not show departures from Hardy-Weinberg equilibrium for Northwestern Chinese Han populations. The accumulated powers of discrimination for the six loci were 0.999998. PMID:19782318

  10. Structure and chemistry in the northwestern condensation of the Serpens molecular cloud core

    Microsoft Academic Search

    Joseph P. McMullin; Lee G. Mundy; Bruce A. Wilking; T. Hezel; Geoff A. Blake

    1994-01-01

    We present single-dish and interferometric observations of gas and dust in the core of the Serpens molecular cloud, focusing on the northwestern condensation. Single-dish molecular line observations are used to probe the structure and chemistry of the condensation while high-resolution images of CS and CH30H are combined with continuum observations from lambda = 1.3 mm to lambda = 3.5 cm

  11. Association of gastric cancer with tyrosine hydroxylase gene polymorphism in a northwestern Chinese population

    Microsoft Academic Search

    Z. Q. Li; W. P. Yu; X. D. Xie; P. Q. Li; T. K. Guo; W. H. Zhang; L. Z. An; X. L. Wang

    2007-01-01

    Gastric cancer (GC) is a common and complex disease caused by multifactors. The aim of our study was to investigate the association\\u000a of the common polymorphisms detected in insulin-like growth factor (IGF)-II, IGF-1 receptor, insulin-like growth factor binding\\u000a protein 1 (IGFBP1), insulin (INS) and tyrosine hydroxylase (TH) with susceptibility to GC in a northwestern Chinese population.\\u000a One hundred and fifty-four

  12. Infaunal abundance in restored and reference marshes of the northwestern Gulf of Mexico 

    E-print Network

    Davis, Brittney

    2011-05-04

    Datta April 2011 Major: Marine Biology ABSTRACT Infaunal Abundance in Restored and Reference Marshes in the Northwestern Gulf of Mexico. (April 2011) Brittney Lauren Davis Department of Marine Biology Texas A&M University Research Advisor: Dr. Anna... marshes to reference conditions occurs in less than 4 years. iii DEDICATION I dedicate this thesis to my advisor, Dr. Anna Armitage, from whom I have learned so much. iv ACKNOWLEDGMENTS Funding for this study was provided in part by the Texas...

  13. Vertical distribution and temporal variation of dissolved organic carbon in the North-Western Mediterranean Sea

    Microsoft Academic Search

    G. Copinmontegut; BERNARD AVRIL

    1993-01-01

    During 1991 and 1992, detailed vertical profiles of dissolved organic carbon (DOC) content were obtained monthly, in the North-Western Mediterranean at the DYFAMED-1 site (43°25'N, 07°52'E). DOC was measured using a high temperature catalytic oxidation method. In the 150-2000 m layer, DOC distribution was quite uniform, with a content of about 0.6--0.7 mg C 1-1. In surface waters, DOC concentration

  14. The first radiocarbon data of bone remains of mammoth faunal forms in northwestern Russia

    Microsoft Academic Search

    A. A. Nikonov; J. Van der Plicht

    2010-01-01

    Unlike in the neighboring territories, the distribution and the period of habitation of late Pleistocene mammoth complex animals\\u000a in the northwestern area of Russia had not been studied until recently. This article fills in this gap using the bone material\\u000a from the Zoological Institute of the Russian Academy of Sciences and the collections of one of the authors. The samples

  15. Interstadial mammoth remains and associated pollen and insect fossils, Kotzebue Sound area, northwestern Alaska

    Microsoft Academic Search

    D. M. Hopkins; R. E. Giterman; J. V. Matthews Jr.

    1976-01-01

    A proboscidian (mammoth or mastodon) skeleton from the Baldwin Peninsula, northwestern Alaska, is associated with plant remains 26,900 (+2,400, -3,400) C14 yr old (AU-90). Pollen from the same level records shrub tundra dominated by dwarf birch, sedges, and grasses; spruce pollen is lacking, and alder is represented only by a few stray grains, indicating that forest vegetation lay hundreds of

  16. Structural influence on hydrocarbon entrapment in the northwestern Red Sea, Egypt

    SciTech Connect

    Salah, M.G.; Alsharhan, A.S. [U.A.E. Univ., Al-Ain (United Arab Emirates)

    1996-01-01

    The northwestern part of the Egyptian Red Sea has attracted the attention of many geologists because it lies at the triple junction of the main rifts between the Red Sea, the Gulf of Aqaba, and Gulf of Suez. The geometry of the fault system in this area of the basin clearly indicates an extensional setting. The area has a southwestward regional dip, and it has experienced more extension than the rest of the Gulf of Suez. Six tectonic stages, different in their stress history, sedimentary fill, and depositional setting, are recognized for the northwestern Red Sea: (1) Cambrian to early Cretaceous stage; (2) late Cretaceous to Oligocene stage; (3) early Miocene stage; (4) early to middle Miocene stage; (5) middle to late Miocene stage; and (6) post-Miocene stage. Magnetic, gravity, seismic, surface, and subsurface data from the northwestern Red Sea delineate several elongate structural highs separated by elongate troughs. Both highs and troughs have the same northwest-southeast direction as the clysmic trend. Some of the highs are dissected by cross elements that trend northeast-southwest and east-north-east-west-southwest and laterally offset these highs. The tectonic framework of the northwestern sector of the Red Sea had a significant influence on hydrocarbon generation, migration, and accumulation. The evidence for this influence includes the following: (1) the troughs form the main source kitchens where the Precambrian basement rocks are present at depths exceeding 4877 in (e.g., Gemsa Trough); (2) the magnitude of throw on the clysmic fault is critical in the entrapment mechanisms; (3) the cross elements play a major role in the hydrocarbon migration and accumulation because they truncate the extension of most of the oil fields and form their bounding faults; and (4) all the discovered oil fields in the study area are structural and/or combination traps and show good matches to the magnetic anomalies.

  17. Allele frequencies for six miniSTR loci of Northwestern Chinese Han populations

    Microsoft Academic Search

    Xue Bai; Bin Cong; Shujin Li; Xia Guo; Xia Li; Lujun He

    2009-01-01

    MiniSTR loci has demonstrated to be an effective approach to recover genetic information from degraded sample, due to the improved PCR efficiency of their reduced PCR product sizes. Allele frequencies and forensic parameters for the six miniSTR loci D10S1248, D2S441, D1S1677, D9S1122, D10S1435 and D17S1301 were investigated in 154 Northwestern Chinese Han populations. All loci showed a moderate degree of

  18. Quantification of carbon sequestration in soils following pasture to forest conversion in northwestern Ecuador

    Microsoft Academic Search

    G. H. J. de Koning; E. Veldkamp; M. Lpez-Ulloa

    2003-01-01

    We studied the changes in soil carbon contents when pastures are converted to either secondary forest or plantation forest in north-western Ecuador. At 40 sites within the region, paired pasture and forest plots were compared. We related the observed soil carbon concentrations, stocks, and changes (in the 00.25 m and 0.250.5 m layers) to land use history, climate, and soil

  19. Antioxidant, hemolytic and cytotoxic activities of Senecio species used in traditional medicine of northwestern Argentina.

    PubMed

    Lizarraga, Emilio; Castro, Felipe; Fernández, Francisco; de Lampasona, Marina P; Catalán, César A N

    2012-05-01

    Senecio nutans Sch. Bip., S. viridis var. viridis Phill. and S. spegazzinii Cabrera are native species used in traditional medicine of northwestern Argentina. The total phenolics, flavonoids and caffeoylquinic acids contents, as well as radical scavenging, antioxidant, hemolytic and cytotoxic activities of aqueous extracts (infusion and decoction) of all three species were determined. S. nutans was the most active. The extracts did not show antibacterial activity. Alkaloids were not detected in any of the aqueous extracts of the three studied species. PMID:22799087

  20. Bedout basement rise, offshore northwestern Australia: evidence of an unshocked mafic volcanic hyaloclastite volcanic breccia

    Microsoft Academic Search

    A. Glikson

    2004-01-01

    Core samples from Bedout-1 (3035.8-3044.95 m.), Bedout basement rise, offshore northwestern Australia, were examined by optical microscopy, SEM, EDS and WDS spectrometry. At this stratigraphic depth level Becker et al. (2004) interpret cryptocrystalline alteration zones around and within plagioclase in terms of shock-induced transformation of feldspar into diaplectic maskelynite glass _u postulating a ~200 km-large impact structure and thereby an

  1. Bedrock incision, rock uplift and threshold hillslopes in the northwestern Himalayas

    Microsoft Academic Search

    Douglas W. Burbank; John Leland; Eric Fielding; Robert S. Anderson; Nicholas Brozovic; Mary R. Reid; Christopher Duncan

    1996-01-01

    The topography of tectonically active mountain ranges reflects a poorly understood competition between bedrock uplift and erosion. Dating of abandoned river-cut surfaces in the northwestern Himalayas reveals that the Indus river incises through the bedrock at extremely high rates (2-12 mm yr-1). In the surrounding mountains, the average angles of hillslopes are steep and essentially independent of erosion rate, suggesting

  2. Fluid inclusion study of Laogou and Xiaoyinuogaigou gold deposits in northwestern Erguna Metallogenic belt, NE China

    Microsoft Academic Search

    Guang Wu; Yanjing Chen; Fengyue Sun; Jun Liua

    Summary Gold deposits and occurrences, including the Shabaosi, Laogou and Xiaoyinuogaigou deposits, have been recently found in northwestern Erguna metallogenic belt along the southeastern margin of the Mongolia-Okhotsk Orogen, which is an important Au-Ag-Pb-Zn-Mo-polymetal belt in NE China. These gold deposits are strictly controlled by ductile shear zones. Orebodies are hosted in subsidiary fractures of these two ductile shear zones.

  3. Organochlorine Compounds in the North-western Black Sea Water: Distribution and Water Column Process

    Microsoft Academic Search

    C. Maldonado; J. M. Bayona

    2002-01-01

    Individual polychlorobiphenyl (PCB) congeners (IUPAC Nos 28, 52, 101, 118, 149, 153, 138, 180, 187 and 170), dichlorodiphenylethanes (DDTs), hexachlorocyclohexanes (HCHs), hexachlorobenzene(HCB) and dieldrin were determined in 37 samples (25 surficial and three vertical profiles) of suspended particulate matter (>0·7?m) (SPM) and 10 dissolved phase (DP) samples (six surficial) collected in the north-western Black Sea waters. The highest concentrations of

  4. Miocene basalts in northwestern Taiwan: Evidence for EM-type mantle sources in the continental lithosphere

    Microsoft Academic Search

    Sun-Lin Chung; Bor-Ming Jahn; Shu-Jen Chen; Typhoon Lee; Cheng-Hong Chen

    1995-01-01

    Cenozoic extension around the Taiwan Strait resulted in intraplate basalt volcanism in the Fujian-Taiwan region of the southeastern China continental margin. In northwestern Taiwan, the basalt volcanism took place in two distinct periods: the early Miocene (23–20 Ma), with the eruption of alkali basalt only, and the late Miocene (13–9 Ma), marked by the emplacement of various basalt types. The

  5. Children, adolescents and young adults suicide data from Epirus, northwestern Greece

    Microsoft Academic Search

    Theodore Vougiouklakis; Christina Tsiligianni; Vassiliki A. Boumba

    2009-01-01

    The aim of this study was to evaluate suicide trends among individuals ? 24 years of age in the region of Epirus, northwestern\\u000a Greece, from January 1998 to December 2008. Twenty-one cases were classified as suicides out of 242 total deaths (8.7%). The\\u000a male to female suicide ratio was 4.25 (17 males and 4 females). The preferred suicide method for those aged ? 19 years involved

  6. Satellite observations of surface circulation in the northwestern Gulf of Mexico during March and April 1989

    Microsoft Academic Search

    Charlie N. Barron; Andrew C. Vastano

    1994-01-01

    Six Argos-reported drifters drogued to a depth of 2.7 m produced eight trajectories over the Texas-Louisiana Shelf and the adjacent oceanic waters of the northwestern Gulf of Mexico from 7 March to 29 April 1989. Launched by United States Coast Guard aircraft and Texas A & M University's R.V. Gyre, the trajectories span the shelf from the vicinity of Barataria

  7. Reconstruction and climatic interpretation of a late Pleistocene peat deposit in northwestern Oregon

    Microsoft Academic Search

    GEORGE O. POINAR; ROBSON BONNICHSEN; CLIFFORD HEDLUND

    Summary 1 Climatic models predict that postglacial conditions in the Pacific Northwest of North America (between 11'000 and 10'000 years BP) were about 2-3 °C cooler than at present. These models were tested by examining plant macrofossils and insect remains in a late Pleistocene peat deposit in northwestern Oregon. 2 Stratigraphy in trenches (540 cm depth) revealed peat from 225

  8. The correct name of the endemic Dasypus (Cingulata: Dasypodidae) from northwestern Argentina.

    PubMed

    Feijó, Anderson; Cordeiro-Estrela, Pedro

    2014-01-01

    We show that Dasypus mazzai Yepes 1933 is a senior synonym of Dasypus yepesi Vizcaíno 1995. We present morphological evidence that the holotype of D. mazzai is not a juvenile of Dasypus novemcinctus or any other species of this genus, but a distinct endemic species from northwestern Argentina undistinguishable from D. yepesi. Therefore, the correct name for the long-nosed armadillo of intermediate size occurring in the Argentinean provinces of Jujuy and Salta is Dasypus mazzai Yepes 1933. PMID:25543926

  9. Draft Genome Sequence of Enterococcus faecium Strain CRL 1879, Isolated from a Northwestern Argentinian Artisanal Cheese.

    PubMed

    Suárez, Nadia E; Saavedra, Lucila; Slozilová, Ivana; Bonacina, Julieta; Demnerová, Katerina; Sesma, Fernando

    2013-01-01

    We report the draft genome sequence of the bacteriocin producer Enterococcus faecium strain CRL 1879, isolated from a northwestern Argentinian artisanal cheese. The draft genome sequence is composed of 73 contigs for 2,886,747 bp, with 3,140 protein-coding genes. Six biosynthetic clusters for bacteriocin class II production were found. Typical virulence determinants, which have relevance in food safety, were not present. PMID:23868133

  10. Selenium concentrations of common weeds and agricultural crops grown in the seleniferous soils of northwestern India

    Microsoft Academic Search

    Karaj S. Dhillon; Surjit K. Dhillon

    2009-01-01

    The plants grown in seleniferous soils constitute a major source of toxic selenium levels in the food chain of animals and human beings. Greenhouse and field experiments were conducted to study selenium concentrations of weeds, forages and cereals grown on seleniferous soils located between 31.0417° to 31.2175° N and 76.1363° to 76.4147° E in northwestern India. Eleven winter season (November–April)

  11. Geology and Geomorphology of Coral Reefs in the Northwestern Hawaiian Islands

    Microsoft Academic Search

    John J. Rooney; Pal Wessel; Ronald Hoeke; Jonathan Weiss; Jason Baker; Frank Parrish; Charles H. Fletcher; Joseph Chojnacki; Michael Garcia; Russell Brainard; Peter Vroom

    The Northwestern Hawaiian Islands (NWHI) comprise a portion of the middle of the 6,126 km long Hawaiian–Emperor seamount chain,\\u000a considered to be the longest mountain chain in the world Grigg (1983) (Fig. 13.1). Located in the middle of the North Pacific\\u000a Ocean, the Hawaiian Islands have been referred to as the most geographically isolated archipelago in the world. The islands

  12. Spicing up life in northwestern Europe: exotic food plant imports in the Roman and medieval world

    Microsoft Academic Search

    Alexandra Livarda

    2011-01-01

    This research investigates the introduction and trade of numerous exotic food plants across northwestern Europe during the\\u000a Roman and medieval periods. Data were collected from all available archaeobotanical records on taxa that cannot grow in the\\u000a study area or which require considerable efforts for their cultivation, together with relevant archaeological information\\u000a (date, site type, context, status) to put the results

  13. Spatial differences and temporal trends of organochlorine compounds in biota from the northwestern hemisphere

    Microsoft Academic Search

    Östen Andersson; Carl-Eric Linder; Mats Olsson; Lars Reutergårdh; Ulla-Britt Uvemo; Ulla Wideqvistt

    1988-01-01

    Tissues of animal species from various trophic levels in the northwestern hemisphere were collected and analyzed for the presence of polychlorinated camphenes (PCC,e.g. toxaphene), DDT and its metabolites DDD and DDE (sDDT) and polychlorinated biphenyls (PCB) to elucidate differences in geographical distribution, biomagnification and temporal trends. Many of the samples were also analyzed for the presence of chlordane. The previously

  14. Vertical distribution of radiocaesium, plutonium and americium in the Catalan Sea (northwestern Mediterranean)

    Microsoft Academic Search

    J. Molero; J. A. Sanchez-Cabeza; J. Merino; L. L. Pujol; P. I. Mitchell; A. Vidal-Quadras

    1995-01-01

    Caesium-137, 239,240Pu and 241Am concentration profiles (0–1000m) have been determined in unfiltered large volume water samples collected from the Catalan Sea (northwestern Mediterranean). Results showed that radiocaesium concentration decreases quickly through the water column while the transuranic concentration increases with depth, showing a faster migration to the bottom layers. Comparing our results with those reported by other authors (1975–1980), radiocaesium

  15. “Berry Patch” As a Kind of Place—the Ethnoecology of Black Huckleberry in Northwestern Canada

    Microsoft Academic Search

    Scott Trusler; Leslie Main Johnson

    2008-01-01

    The Gitksan and Wet’suwet’en of Northwestern British Columbia formerly used landscape burning to manage patches of black huckleberry\\u000a (Vaccinium membranaceum), the most important plant resource of their seasonal round. In view of its significance one might postulate that managed\\u000a sites would conform to a biophysical or ecological type to maximize return for effort. However, a survey of a number of

  16. NEST-SITE CHARACTERISTICS OF HAMMOND'S AND PACIFIC SLOPE FLYCATCHERS IN NORTHWESTERN CALIFORNIA1

    Microsoft Academic Search

    HOWARD F. SAKAI; BARRY R. NOON

    Thirty nests of Hammond's (Empidonax hammondii) and 88 nests of Pacific- slope (E. difficilis) Flycatchers were located in different-aged Douglas-fir (Pseudotsuga men- ziesii)\\/tanoak (Lithocarpus densiflorus) dominated forests at 12 study sites in northwestern California during the breeding seasons of 1984, 1985, 1987, and 1988. In contrast to Pacific- slope Flycatchers, Hammond's used nest trees that averaged two to three times

  17. Toothed whales in the northwestern Mediterranean: Insight into their feeding ecology using chemical tracers

    Microsoft Academic Search

    Emilie Praca; Sophie Laran; Gilles Lepoint; Jean-Pierre Thomé; Antoni Quetglas; Paola Belcari; Paolo Sartor; Frank Dhermain; Denis Ody; Nathalie Tapie; Hélène Budzinski; Krishna Das

    2011-01-01

    Risso’s dolphins, pilot whales and sperm whales rarely strand in the northwestern Mediterranean. Thus, their feeding ecology, through the analysis of stomach contents, is poorly known. The aim of this study was to gain further insight into the segregation\\/superposition of the diet and habitat of Risso’s dolphins, pilot whales and sperm whales using chemical tracers, namely, stable isotopes (?13C, ?15N)

  18. Habitat and reef-fish assemblages of banks in the Northwestern Hawaiian Islands

    Microsoft Academic Search

    Frank A. Parrish; Raymond C. Boland

    2004-01-01

    The moderately deep terraces and banks of the Northwestern Hawaiian Islands (NWHI) were surveyed to describe their habitat and reef-fish assemblages. These tracts of bottom at 30–40 m comprise more than 4,500 km 2of the region’s reef area. The habitat was found to be dominated by algal meadows (65% cover of exposed bottom), with infrequent relief features. Annual monitoring of select stations

  19. The positional behavior of pygmy marmosets ( Cebuella pygmaea ) in northwestern Bolivia

    Microsoft Academic Search

    Colin Phillip Jackson

    2011-01-01

    Pygmy marmosets are distinctive given their diminutive body size, their year-round reliance upon exudates, and their use of\\u000a morphologically adapted tegulae to engage in a high degree of claw-clinging behaviors associated with exudate exploitation.\\u000a This project examined the positional behavior and habitat preferences of one group of pygmy marmosets in a secondary forest\\u000a within the Department of Pando, northwestern Bolivia.

  20. Was the Coppermine Homocline of northwestern Canada uplifted as part of a Middle Proterozoic forebulge

    SciTech Connect

    Cook, F.A. (Univ. of Calgary, Alberta (Canada))

    1991-01-01

    Application of the principles of elastic plate bending to subsurface geometric information and outcrop in northwestern Canada suggests that Proterozoic crust was loaded and deflected during orogenic activity between about 1.6 and 1.1 Ga. Exposed Hudsonian (ca. 1.8-2.0 Ga) basement separating younger but coeval stratigraphic sequences in the Coppermine Homocline on the west and Bathurst Inlet on the east can be explained as a forebulge associated with the loading.

  1. Time variable bottom water outflow in the Northwestern Weddell Sea

    NASA Astrophysics Data System (ADS)

    Kanzow, Torsten; Rohardt, Gerd

    2015-04-01

    The Antarctic Bottom Water (AABW) has shown widespread warming in recent decades, with implications for sea level rise and global heat uptake. Anomalously warm AABW has recently been reported to have reached the Brazil basin in the South Atlantic, while the warming further south partly seems to have come to a halt. The Weddell Sea represents the primary source of Antarctic Bottom Water (AABW) formation in the Southern Ocean. More than 60% of the AABW are supplied by Weddell Sea Deep Water, of which Weddell Sea Bottom Water (WSBW) is the main source. WSBW descends down the continental slope along the western margin of the Weddell Sea as a northward flowing plume, thereby entraining warmer ambient waters. The plume has been observed using moored current meters and temperature sensors between 1989 and 1998 and between 2005 and 2012 near the tip of the Antarctic Peninsula, complemented by repeated cross-slope CTD sections along the mooring array. In this study we extend the WSBW volume transport and temperature time series of Fahrbach et al. (2001) originally covering the 1989-1998 interval by the more recent period. We will report on both seasonal to inter-annual variability and possible longer-term trends in both volume transport and temperature of WSBW. The results will be discussed in the context of changes in the source areas of WSBW, such as the breakup of parts of the Larsen Ice Shelf on the eastern Arctic Peninsula, possibly fueling the formation dense water on the shelf.

  2. Cenozoic tectonic evolution of the basin and range province in northwestern Nevada

    USGS Publications Warehouse

    Colgan, J.P.; Dumitru, T.A.; Reiners, P.W.; Wooden, J.L.; Miller, E.L.

    2006-01-01

    A regional synthesis of new and existing geologic and thermochronologic data document late Cretaceous - early Cenozoic regional erosion, Oligocene - Miocene volcanism, and subsequent late Miocene extension of the Basin and Range Province in northwestern Nevada and northeastern California. Across an ???220-km-wide region between the Santa Rosa and Warner Ranges, conformable sequences of 35 to 15 Ma volcanic rocks are cut by only a single generation of high-angle normal faults that accommodated ???23 km of total east-west extension (???12%). Fission-track, (U-Th)/He, geologic, and structural data from the Pine Forest Range show that faulting there began at 11 to 12 Ma, progressed at a relatively constant rate until at least 3 Ma, and has continued until near the present time. Extension in the Santa Rosa Range to the east took place during the same interval, although the post-6 Ma part of this history is less well constrained. Less complete constraints from adjacent ranges permit a similar timing for faulting, and we infer that extensional faulting in northwestern Nevada began everywhere at 12 Ma and has continued up to the present. Faulting in the Warner Range in northeastern California can only be constrained to have begun between 14 and 3 Ma, but may represent westward migration of Basin and Range extension during the Pliocene. Compared to the many parts of the Basin and Range in central and southern Nevada, extension in northwestern Nevada began more recently, is of lesser total magnitude, and was accommodated entirely by high-angle normal faults. Fission-track data document Late Cretaceous unroofing of Cretaceous (115 - 100 Ma) granitic basement rocks in northwestern Nevada, followed by a long period of relative tectonic quiescence that persisted through Oligocene and Miocene volcanism until the onset of Basin and Range extension at ???12 Ma. The low magnitude of extension (12%) and early Tertiary stability suggest that the modern ???31 km thick crust in northwestern Nevada was only slightly thicker (???35 km) prior to extension at 12 Ma, and was no thicker than ???38 km in the Late Cretaceous. This stands in contrast to other parts of the Basin and Range, where the crust was thickened to at least 45 to 50 km by Cretaceous thrusting and subsequently thinned to ???30 km by large magnitude (>50%) extension.

  3. The Cocos Ridge drives collision of Panama with northwestern South America

    NASA Astrophysics Data System (ADS)

    LaFemina, Peter; Govers, Rob; Mora-Paez, Hector; Geirsson, Halldor; Cmacho, Eduardo

    2015-04-01

    The collision of the Panamanian isthmus with northwestern South America is thought to have initiated as early as Oligocene - Miocene time (23-25 Ma) based on geologic and geophysical data and paleogeographic reconstructions. This collision was driven by eastward-directed subduction beneath northwestern South America. Cocos - Caribbean convergence along the Middle America Trench, and Nazca - Caribbean oblique convergence along the South Panama Deformed Belt have resulted in complex deformation of the southwestern Caribbean since Miocene - Pliocene time. Subduction and collision of the aseismic Cocos Ridge is thought to have initiated <3.5 Ma and has been linked to: 1) late Miocene-Pliocene cessation of volcanism and uplift of the Cordillera de Talamanca; 2) Quaternary migration of the volcanic arc toward the back-arc; 3) Quaternary to present deformation within the Central Costa Rica Deformed Belt; 4) Quaternary to present shortening across the fore-arc Fila Costeña fold and thrust belt and back-arc North Panama Deformed Belt (NPDB); 5) Quaternary to present outer fore-arc uplift of Nicoya Peninsula above the seamount domain, and the Osa and Burica peninsulas above the ridge; and 6) Pleistocene to present northwestward motion of the Central American Fore Arc (CAFA) and northeastward motion of the Panama Region. We investigate the geodynamic effects of Cocos Ridge collision on motion of the Panama Region with a new geodynamic model. The model is compared to a new 1993-2015 GPS-derived three-dimensional velocity field for the western Caribbean and northwestern South America. Specifically, we test the hypotheses that the Cocos Ridge is the main driver for upper plate deformation in the western Caribbean. Our models indicate that Cocos Ridge collision drives northwest-directed motion of the CAFA and the northeast-directed motion of the Panama Region. The Panama Region is driven into the Caribbean across the NPDB and into northwestern South America, which is also converging with the Panama Region, pushing it toward the west-northwest. Therefore, modern collision of Panama with northwestern South America is driven by collision of the Cocos Ridge.

  4. Regolith Formation

    NSDL National Science Digital Library

    2012-08-03

    This is an activity about the formation of regolith, the loose fragmental material on the Moon's surface. Learners will engage in a series of hands-on activities comparing and contrasting regolith formation processes on the Moon and on Earth. This activity is in Unit 2 of the Exploring the Moon teachers guide and is designed for use especially, but not exclusively, with the Lunar Sample Disk program.

  5. Bedout basement rise, offshore northwestern Australia: evidence of an unshocked mafic volcanic hyaloclastite volcanic breccia

    NASA Astrophysics Data System (ADS)

    Glikson, A.

    2004-12-01

    Core samples from Bedout-1 (3035.8-3044.95 m.), Bedout basement rise, offshore northwestern Australia, were examined by optical microscopy, SEM, EDS and WDS spectrometry. At this stratigraphic depth level Becker et al. (2004) interpret cryptocrystalline alteration zones around and within plagioclase in terms of shock-induced transformation of feldspar into diaplectic maskelynite glass _u postulating a ~200 km-large impact structure and thereby an impact connection of the Permian-Triassic boundary mass extinction. However, the breccia is dominated by fragments of microlitic basalt and ophitic-textured dolerite with well preserved igneous textures, showing no evidence of shock metamorphism. Euhedral pseudomorphs of chlorite and amphibole, probably after pyroxene, protrude into or are enveloped by euhedral albite-twinned calcic plagioclase (andesine to bytownite). Minor phases include euhedral ilmenite needles and subhedral magnetite grains. Plagioclase is altered by cryptocrystalline albite and microcrystalline albite-chlorite matrix along crystal boundaries, along twin lamella and within internal oscillatory crystal zones, consistent with burial metamorphosed hydrovolcanic basalts and spilites (e.g. Amstutz, 1974). The volcanic fragments are set within, and injected by, microcrystalline intergranular mesostasis of mixed mineral fragments and volcanic meta-glass. Becker et al. (2004) refer to the breccia in part as product of Mg-rich sediments (e.g. dolomites). However, apart from the pristine igneous textures of the breccia, the transition element levels (chlorite in dolerite fragment "C Ni 97-160 ppm; Co 75-152 ppm; Cu 69-204 ppm; mesostasis "C Ni 29-45 ppm; Co 18-52 ppm; Cu 26-110 ppm) are consistent with Fe-rich basalts but exceed common abundances in carbonates and marls (BVTP, 1981; Wedepohl, 1978). No shock metamorphic features, such as planar deformation features (PDF), are observed in the feldspar or in any other phases. No criteria for discriminating maskelynite and volcanic meta-glass are indicated by Becker et al. (2004). As PDF formation (10-35 GPa) necessarily precedes diaplectic transformation into maskelynite (35-45 GPa) (French, 1998), a presence of maskelynite is inconsistent with the absence of PDF in the plagioclase _u a phase prone to the development of shock effects (e.g. Mory, 2000). Little evidence exists for the hydrothermal activity which typically follows impact events. However, thanks to a partial development of a rim syncline-like structure in Triassic sediments around the Bedout rise, further testing of the origin of this remarkable structure is warranted. Amstutz, G.C., 1974, Spilites and Spilitic Rocks, Springer-Verlag, Berlin; Becker, L. et al., 2004, Science Express, 13.5.04; BVSP - Basaltic Volcanism Study Project, 1981, Pergamon; French, B.M., 1998, Traces of Catastrophe, Lunar and Planetary Contributions 954; Mory et al., 2000, Earth and Planetary Science, 177, 119-128; Wedepohl, K.H., Handbook of Geochemistry, Springer-Verlag, 1978.

  6. Late Cretaceous to Middle Eocene Geological Evolution of the Northwestern Caribbean - Constraints from Cuban Data

    NASA Astrophysics Data System (ADS)

    Cobiella, J.; Hueneke, H.; Meschede, M.; Sommer, M.

    2006-05-01

    Cuba acts as the northwestern boundary of the Caribbean Sea. However it is not part of the Caribbean plate, its geological development is deeply related to the plate history. In fact, its Cretaceous volcanic arc rocks tightly correlate with coeval sections in Hispaniola and Puerto Rico, and the same probably occurs with the ophiolites. The early Palaeogene events in Cuba were also involved in the Caribbean plate history. In general, two principal structural levels can be distinguished in the geological structure of Cuba. The rocks belonging to the upper level (Eocene to Quaternary) are little disturbed and can be referred to as the cover. Below it occurs the great complex of the Cuban orogenic belt, which consists mainly of rocks of Jurassic to Eocene age. In addition, small outcrops of Proterozoic metamorphic rocks also occur in north central Cuba. The Palaeocene-Eocene section contains volcanic arc sequences in SE Cuba and northward thrusted piggy back and foreland basins in central and western Cuba. The Mesozoic rocks lies unconformably below. The contacts between the major Mesozoic elements are always tectonic. With the exception of the rocks of the passive Mesozoic margin of North America in northern Cuba, the remaining units represent tectonostratigraphic terranes extending parallel to the axis of the present main island of Cuba. The northernmost unit is the Mesozoic passive continental margin of North America. It consists of a Jurassic- Cretaceous mainly marine sedimentary sequence now exposed as a thrust and fold belt along the northern edge of the Cuban mainland. The other units are, from north to south: the Northern Ophiolitic Belt, the Volcanic Arc Terrane and the Southern Metamorphic Terranes. The ophiolites and the Cretaceous volcanic arc terranes belong to the Proto-Caribbean plate and were accreted to the palaeomargin during Late Cretaceous and early Palaeogene episodes. Some constrains to Caribbean plate origin and evolution according to data from Cuba: Ophiolites: 1- The age of the rocks of the northern ophiolite belt is Upper Jurassic-Albian. Oceanic lithosphere formation, at least in the "Cuban" Proto-Caribbean, ended in the Albian. Cretaceous volcanic arcs: 2- At least two volcanic arc Cretaceous sections are present in Cuba, separated in several regions by a mainly sedimentary Albian-Cenomanian section. The lower arc is probably of Aptian-Albian age. The Cenomanian (or Turonian?) -Campanian upper arc is calcalkalic and contains abundant sedimentary marine interbeds. 3- Some thin tuff beds are present in the southernmost deep water deposits of the North American palaeomargin in western and central Cuba in the Aptian-Cenomanian. This fact could be explained by a volcanic arc located several hundred km to the south of the NA palaeomargin. 4- Cretaceous volcanism ended during the early Campanian all along Cuba. Sedimentary upper Campanian and Maastrichtian sections rest on top of the older Cretaceous sections. Volcanism is only reassumed in SE Cuba (Turquino volcanic arc) late in the Danian. Southern metamorphic terranes: 5- The southern metamorphic terranes are a main feature in the geology of Cuba. They are continental blocks sharing many stratigraphic features with the NA palaeomargin of western Cuba (Guaniguanico mountains). As the last one area seems related to the Yucatan (Maya) block, some authors consider the metamorphic terranes as fragments of the Maya block that travelled to the west.

  7. Regional cloud characteristics over the tropical northwestern Pacific as revealed by Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar and TRMM Microwave Imager

    Microsoft Academic Search

    Myung-Sook Park; Yong-Sang Choi; Chang-Hoi Ho; Chung-Hsiung Sui; Seon Ki Park; Myoung-Hwan Ahn

    2007-01-01

    The present study investigates regional cloud characteristics over the tropical northwestern Pacific using Tropical Rainfall Measuring Mission (TRMM) data sets such as rain rate, radar reflectivity, and passive microwave radiometer polarization corrected temperature (PCT). In particular, the tropical northwestern Pacific is divided into two surface rain maxima regions: the South China Sea (SCS) and the Philippine Sea (PS). The TRMM

  8. Image courtesy of the Image Science & Analysis Laboratory, NASA Johnson Space Center (ISS006-E-42326). The hydroelectrical potential of North-Western

    E-print Network

    Borsdorf, Axel

    -42326). #12;The hydroelectrical potential of North-Western Patagonia ­ balancing economic development and ecological protection axel borsdorf #12;156 The hydroelectrical potential of North-Western Patagonia the rest an expansion of the hydroelectric potential, first proposed 30 years ago (Borsdorf 1987: 156ff), can

  9. Galaxy formation

    NASA Technical Reports Server (NTRS)

    Silk, J.

    1984-01-01

    Implications of the isotropy of the cosmic microwave background on large and small angular scales for galaxy formation are reviewed. In primeval adiabatic fluctuations, a universe dominated by cold, weakly interacting nonbaryonic matter, e.g., the massive photino is postulated. A possible signature of photino annihilation in our galactic halo involves production of cosmic ray antiprotons. If the density is near its closure value, it is necessary to invoke a biasing mechanism for suppressing galaxy formation throughout most of the universe in order to reconcile the dark matter density with the lower astronomical determinations of the mean cosmological density. A mechanism utilizing the onset of primordial massive star formation to strip gaseous protogalaxies is described. Only the densest, early collapsing systems form luminous galaxies.

  10. Late Pleistocene Vertebrates and Other Fossils from Epiguruk, Northwestern Alaska

    USGS Publications Warehouse

    Hamilton, T.D.; Ashley, G.M.; Reed, K.M.; Schweger, C.E.

    1993-01-01

    Sediments exposed at Epiguruk, a large cutbank on the Kobuk River about 170 km inland from Kotzebue Sound, record multiple episodes of glacial-age alluviation followed by interstadial downcutting and formation of paleosols. Vertebrate remains from Epiguruk include mammoth, bison, caribou, an equid, a canid, arctic ground squirrel, lemmings, and voles. Radiocarbon ages of bone validated by concordant ages of peat and wood span the interval between about 37,000 and 14,000 yr B.P. The late Pleistocene pollen record is dominated by Cyperaceae, with Artemisia, Salix, Betula, and Gramineae also generally abundant. The fossil record from Epiguruk indicates that the Kobuk River valley supported tundra vegetation with abundant riparian willows during middle and late Wisconsin time. Large herbivores were present during the height of late Wisconsin glaciation as well as during its waning stage and the preceding interstadial interval. The Kobuk River valley would have been a favorable refugium for plants, animals, and possibly humans throughout the last glaciation.

  11. Coalbed methane resource potential of the Piceance Basin, northwestern Colorado

    SciTech Connect

    Tyler, R.; Scott, A.R.; Kaiser, W.R. [Univ. of Texas, Austin, TX (United States)

    1996-06-01

    As predicted, from an evolving coalbed methane producibility model, prolific coalbed methane production is precluded in the Piceance Basin by the absence of coal bed reservoir continuity and dynamic ground-water flow. The best potential for production may lie at the transition zone from hydropressure to hydrocarbon overpressure and/or in conventional traps basinward of where outcrop and subsurface coals are in good reservoir and hydraulic communication. Geologic and hydrologic synergy among tectonic and structural setting, depositional systems and coal distribution, coal rank, gas content, permeability and hydrodynamics are the controls that determine the coalbed methane resource potential of the Piceance Basin. Within the coal-bearing Upper Cretaceous Williams Fork Formation, the prime coalbed methane target, reservoir heterogeneity and thrust faults cause coal beds along the Grand Hogback and in the subsurface to be in modest to poor reservoir and hydraulic communication, restricting meteoric ground water recharge and basinward flow. Total subsurface coalbed methane resources are still estimated to be approximately 99 Tcf (3.09 Tm{sup 3}), although coalbed methane resource estimates range between 80 (2.49 Tm{sup 3}) and 136 Tcf (4.24 Tm{sup 3}), depending on the calculation method used. To explore for high gas contents or fully gas-saturated coals and consequent high productivity in the Piceance Basin, improved geologic and completion technologies including exploration and development for migrated conventionally and hydrodynamically trapped gases, in-situ generated secondary biogenic gases, and solution gases will be required.

  12. Geohydrology of the lower Apalachicola-Chattahoochee-Flint River basin, southwestern Georgia, northwestern Florida, and southeastern Alabama

    USGS Publications Warehouse

    Torak, Lynn J.; Painter, Jaime A.

    2006-01-01

    The lower Apalachicola-Chattahoochee-Flint (ACF) River Basin contains about 4,600 square miles of karstic and fluvial plains and nearly 100,000 cubic miles of predominantly karst limestone connected hydraulically to the principal rivers and lakes in the Coastal Plain of southwestern Georgia, northwestern Florida, and southwestern Alabama. Sediments of late-middle Eocene to Holocene in hydraulic connection with lakes, streams, and land surface comprise the surficial aquifer system, upper semiconfining unit, Upper Floridan aquifer, and lower semiconfining unit and contribute to the exchange of ground water and surface water in the stream-lake-aquifer flow system. Karst processes, hydraulic properties, and stratigraphic relations limit ground-water and surface-water interaction to the following hydrologic units of the stream-lake-aquifer flow system: the surficial aquifer system, upper semiconfining unit, Upper Floridan aquifer, and lower confining unit. Geologic units corresponding to these hydrologic units are, in ascending order: Lisbon Formation; Clinchfield Sand; Ocala, Marianna, Suwannee, and Tampa Limestones; Hawthorn Group; undifferentiated overburden (residuum); and terrace and undifferentiated (surficial) deposits. Similarities in hydraulic properties and direct or indirect interaction with surface water allow grouping sediments within these geologic units into the aforementioned hydrologic units, which transcend time-stratigraphic classifications and define the geohydrologic framework for the lower ACF River Basin. The low water-transmitting properties of the lower confining unit, principally the Lisbon Formation, allow it to act as a nearly impermeable base to the stream-lake-aquifer flow system. Hydraulic connection of the surficial aquifer system with surface water and the Upper Floridan aquifer is direct where sandy deposits overlie the limestone, or indirect where fluvial deposits overlie clayey limestone residuum. The water level in perched zones within the surficial aquifer system fluctuates independently of water-level changes in the underlying aquifer, adjacent streams, or lakes. Where the surficial aquifer system is connected with surface water and the Upper Floridan aquifer, water-table fluctuations parallel those in adjacent streams or the underlying aquifer. More...

  13. Uplift and Subsidence in the Northwestern German North Sea and their Impact on Sedimentation and Erosion of Mesozoic to Cenozoic sediments

    NASA Astrophysics Data System (ADS)

    Jaehne, Fabian; Arfai, Jashar; Lutz, Rüdiger

    2013-04-01

    Within the framework of the GPDN project (www.geopotenzial-nordsee.de) a detailed seismic mapping project focuses on the northwestern offshore part of the German North Sea sector, the so called 'Entenschnabel' area, which was not considered in former studies (Baldschuhn et al., 2001) of the German North Sea sector. The Northwestern German North Sea is characterized by a complex rift dominated structural pattern in the Mesozoic, with the Central Graben as the main structure, resulting from a multiphase tectonic evolution. Several phases of uplift and subsidence were driven by extensional and compressional tectonic events, as well as by volcanic activity at the North Sea Dome and by extensive mobilization of Zechstein salt. These different influences on the sedimentary and structural evolution and their changes over time are distinguishable by detailed mapping of several formations. Spatial distribution of these formations and their thickness variations reveal changes of depocenters and changes of internal geometry. In the Entenschnabel area, the Central Graben is the dominating structural element. First extensional pulses took place in the Lower Triassic followed by several phases of rifting from the Middle to Late Triassic. The age of rifting phases can be defined by thickening of syn-tectonic Triassic to Jurassic strata towards the major fault zones. During the Jurassic the main extensional phase took place in combination with extensive diapirism. Analyses of the distribution and the thicknesses of sediments in rim-synclines reveal that most of the salt structures inside the Central Graben had a main phase of growth during the Late Jurassic. The Jurassic to Cenozoic evolution of the Central Graben and surrounding areas is closely related to the evolution of the volcanic activity at the North Sea Rift Dome (Graversen, 2006). In most of the German North Sea a supra-regional uplift driven by this volcanic activity led to a major erosional event, which is defined by a major unconformity at the base of the Lower Cretaceous. In contrast the German part of the Central Graben is characterized by continuous sedimentation during this time. Another difference of the German Central Graben compared to the rest of the German North Sea is a structural inversion of parts of the graben during the Late Cretaceous. Greatest thicknesses of the Upper Cretaceous are reached on the eastern graben shoulder of the Central Graben along the Nordschillgrund High. The reason for subsidence along this long-living Triassic to Jurassic structural high has to be investigated. Baldschuhn, R., et al. (2001). Geotektonischer Atlas von Nordwestdeutschland und dem deutschen Nordsee-Sektor - Strukturen, Strukturentwicklung, Paläogeographie. Geologisches Jahrbuch, A 153: 3-95. Graversen, O. (2006). The Jurassic-Cretaceous North Sea Rift Dome and Associated Basin Evolution. Search and Discovery.

  14. Planet formation

    Microsoft Academic Search

    Jack J. Lissauer

    1993-01-01

    Models of planetary formation are developed using the present single example of a planetary system, supplemented by limited astrophysical observations of star-forming regions and circumstellar disks. The solar nebula theory and the planetesimal hypothesis are discussed. The latter is found to provide a viable theory of the growth of the terrestrial planets, the cores of the giant planets, and the

  15. Molecular sex identification of dry human teeth specimens from Sokoto, Northwestern Nigeria

    PubMed Central

    Zagga, AD; Ahmed, H. OON; Ismail, SM; Tadros, AA

    2014-01-01

    Background: The advent of molecular techniques has revolutionized the ability of scientists to estimate the sex of individuals. Forensic odontology plays an important role in establishing the sex of victims with bodies mutilated beyond recognition due to major disaster. The genetic difference between males and females is defined by the presence or absence of the Y-chromosome. The use of alphoid-repeat primers in sex estimation was first applied on dried blood. Generally, the X, Y alphoid repeats blind test attest to the accuracy of genetic testing, and also point the potential for occasional error in morphometric sexing. Aim: To estimate genetic sex of dry human teeth specimens from Sokoto, Northwestern Nigeria, using polymerase chain reaction (PCR). Materials and Methods: A single-blind study of DNA analysis for sex estimation of nine dry human teeth specimens from Sokoto, Northwestern Nigeria, through PCR, using alphoid repeats primers, was undertaken. Results: The genetic sex of each group of the teeth samples were accurately (100%) identified. For each group of teeth, PCR Sensitivity = 100%, Specificity = 0%, Predictive value of positive test = 100%, Predictive value of negative test = 0%, False positive rate = 0%, False negative rate = 0%, Efficiency of test = 100%. Fisher's exact probability test P = 1. Z-test: z- and P values were invalid. Conclusion: This study has demonstrated the successful use of alphoid-repeat primers in genetic sex identification of human dry teeth samples from Sokoto, Northwestern Nigeria. This is the first known study estimating the sex of human dry teeth specimens by means of PCR in Nigeria. There is need for further studies in Nigeria to complement the findings of this study. PMID:25125922

  16. Co-location opportunities for renewable energy and agriculture in Northwestern India: Tradeoffs and Synergies

    NASA Astrophysics Data System (ADS)

    Ravi, S.; Macknick, J.; Lobell, D. B.; Field, C. B.; Ganesan, K.; Jain, R.; Elchinger, M.; Stoltenberg, B.

    2014-12-01

    Solar energy installations in arid and semi-arid regions of India are rapidly increasing, due to technological advances and policy support. Even though solar energy provides several benefits such as reduction of greenhouse gases, reclamation of degraded land, and improving the quality of life, the deployment of large-scale solar energy infrastructure can adversely impact land and water resources. A major challenge is how to meet the ever-expanding energy demand with limited land and water resources, in the context of increasing competition from agricultural and domestic consumption. We investigated whether water consumption for solar energy development in northwestern India could impact other water and land uses, and explored opportunities to co-locate solar infrastructures and agricultural crops to maximize the efficiency of land and water use. We considered energy inputs/outputs, water use, greenhouse gas emissions and economics of solar installations in northwestern India in comparison to Aloe vera cultivation, a widely promoted land use in the region. The life cycle analyses show that co-located systems are economically viable in some rural areas and may provide opportunities for rural electrification and stimulate economic growth. The water inputs for cleaning solar panels and dust suppression are similar to amounts required for aloe, suggesting the possibility of integrating the two systems to maximize water and land use efficiency. A life-cycle analysis of a hypothetical co-location indicated higher returns per m3 of water used than either system alone. The northwestern region of India is experiencing high population growth, creating additional demand for land and water resources. In these water limited areas, coupled solar infrastructure and agriculture could be established on marginal lands, thus minimizing the socioeconomic and environmental issues resulting from cultivation of non-food crops (e.g. Aloe) in prime agricultural lands.

  17. The basement of the Eastern Cordillera, Colombia: An allochthonous terrane in northwestern South America

    NASA Astrophysics Data System (ADS)

    Forero Suarez, A.

    The fault system of the Borde Llanero of Colombia represents the limit between two early Paleozoic geologic provinces: the Guiana Shield (Gondwana) to the east, and an allochthonous terrane — formerly a piece of the North American continent — to the west. The Baudó Range, the Western Cordillera, and the western flank of the Central Cordillera are the result of post-Jurassic accretion. In contrast the pre-Emsian metamorphic rocks of the eastern flank of the Central Cordillera, of the Eastern Cordillera of Colombia, and of the Mérida Andes correspond to an allochthonous terrane that was accreted to the north-western continental border of South America during the collision between North America and Gondwana in Silurian-Early Devonian times. Geochronologic and petrographic data indicate the presence of the Grenvillian granulite belt, represented by the Garzón-Sierra Nevada de Santa Marta belt. This belt is separated from the Guiana Shield by a magmatic tract which is parallel to the Borde Llanero of Venezuela and Colombia. The late Paleozoic regional metamorphism in the Northern Andes of Colombia occurred during Late Silurian-Early Devonian times. Since the late Emsian, a sedimentary cycle was initiated on this allochthonous basement. The faunal records of northwestern South America and the North American continent are indistinguishable for that time. This similarity clearly shows that both northwestern South America and the North American regions of the Appalachians and New Mexico belong to the same paleobiogeographic province. The faunal communication in this case supports the idea of the immediate neighborhood of the two continents.

  18. Crustaceans from antipatharians on banks of the northwestern Gulf of Mexico

    PubMed Central

    Wicksten, Mary K.; Nuttall, Marissa F.; Hickerson, Emma L.

    2014-01-01

    Abstract The stalked barnacle Oxynaspis gracilis, the chirostylid squat lobster Uroptychus sp., and the caridean shrimps Periclimenes cf. antipathophilus and Pseudopontonides principis have been collected at 68–124 m by a remotely operated vehicle (ROV) on banks in the northern Gulf of Mexico. These species inhabited six species of antipatharian hosts. Pseudopontonides principis, Oxynaspis gracilis, and Uroptychus sp. were not confined to a single host species. Except for Oxynaspis gracilis, collected by ROV in 2004–2005, these species have not been reported previously in the northwestern Gulf of Mexico. PMID:25561830

  19. Suillus indicus sp. nov. (Boletales, Basidiomycota), a new boletoid fungus from northwestern Himalayas, India

    PubMed Central

    Verma, Balwant; Reddy, M. Sudhakara

    2015-01-01

    The new species Suillus indicus is described based on the morpho-anatomical description and molecular analysis of basidiomes found in conifer forests of the northwestern Himalayas, India. Morphologically, the key diagnostic characteristics of the new taxon are brownish-orange to reddish-brown pileus with low obtuse umbo, brownish-red to reddish-brown fibrillose squamules over the pileal surface, and absence of fibrillose squamules and glandular dots on the stipe surface. Sequences derived from the internal transcribed spacer region of basidiomes and culture demonstrated that the species is clearly distinct from other known taxa of Suillus and new to science. PMID:26000197

  20. Characteristics of extreme rainfall events in northwestern Peru during the 1982-1983 El Nino period

    NASA Technical Reports Server (NTRS)

    Goldberg, R. A.; Tisnado, G. M.; Scofield, R. A.

    1987-01-01

    Histograms and contour maps describing the daily rainfall characteristics of a northwestern Peru area most severely affected by the 1982-1983 El Nino event were prepared from daily rainfall data obtained from 66 stations in this area during the El Nino event, and during the same 8-month intervals for the two years preceding and following the event. These data were analyzed, in conjunction with the anlysis of visible and IR satellite images, for cloud characteristics and structure. The results present a comparison of the rainfall characteristics as a function of elevation, geographic location, and the time of year for the El Nino and non-El Nino periods.

  1. Tree mortality in a mixed deciduous forest in Northwestern Russia over 22 years

    Microsoft Academic Search

    Igor Drobyshev; Alexander Dobrovolsky; Vasiliy Neshataev

    2009-01-01

    – \\u000a \\u000a • We studied mortality rates of birch, small-leaved linden, pedunculate oak, Norway maple, black alder, common ash and Norway\\u000a spruce, assessed through two inventories of 12 664 trees in the unmanaged mixed deciduous forests of Oranienbaum Park, northwestern\\u000a Russia, in 1981 and 2003.\\u000a \\u000a \\u000a \\u000a \\u000a – \\u000a \\u000a • Our objectives were to evaluate if (a) long-term mortality rates vary among species, and

  2. Galaxy formation

    PubMed Central

    Peebles, P. J. E.

    1998-01-01

    It is argued that within the standard Big Bang cosmological model the bulk of the mass of the luminous parts of the large galaxies likely had been assembled by redshift z ? 10. Galaxy assembly this early would be difficult to fit in the widely discussed adiabatic cold dark matter model for structure formation, but it could agree with an isocurvature version in which the cold dark matter is the remnant of a massive scalar field frozen (or squeezed) from quantum fluctuations during inflation. The squeezed field fluctuations would be Gaussian with zero mean, and the distribution of the field mass therefore would be the square of a random Gaussian process. This offers a possibly interesting new direction for the numerical exploration of models for cosmic structure formation. PMID:9419326

  3. Planet Formation

    Microsoft Academic Search

    Thomas Quinn

    2005-01-01

    Motivating the study of planet formation is not difficult for any curious audience. One of the fundamental human questions\\u000a is that of origins: “where did I come from?„. Breaking this down into constituents produces a series of questions. How did\\u000a the Universe begin? How did stars form? How did planets form? How did life begin? How did intelligent life develop?

  4. Aridity in the monsoon zone as indicated by desert dune formation in the Gregory Lakes basin, northwestern Australia

    Microsoft Academic Search

    K. E. Fitzsimmons; G. H. Miller; N. A. Spooner; J. W. Magee

    2012-01-01

    Desert dunes within the monsoon-fed Gregory Lakes basin form valuable archives for Quaternary paleoenvironments, in a region where such records are scarce. Optically stimulated luminescence (OSL) chronologies from two dunes identify the timing of eolian processes, interpreted as a complex response to aridification and increased sediment availability during lake transgressions and associated fluvial activity. The earliest eolian deposition in our

  5. To get started, point your browser to http://www.northwestern.edu/hr/jobs . 1. If you are a staff member, faculty member, or a student that is paid click on the Current Northwestern

    E-print Network

    Shahriar, Selim

    To get started, point your browser to http://www.northwestern.edu/hr/jobs . 1. If you are a staff to search for regular staff or temporary jobs. You will be brought to the Self Service sign in page where links. Self Service > Recruiting/Job Openings > Apply for Jobs. This will automatically sign you

  6. Aerosols properties during dust-storm episodes over Jaipur, Northwestern India

    NASA Astrophysics Data System (ADS)

    Payra, Swagata; Verma, Sunita; Prakash, Divya; Kumar, Pramod; Soni, Manish; Holben, Brent

    2013-05-01

    Continuous routine aerosol measurements have been carried out at Jaipur (Rajasthan, Northwestern India) since April 2009 with a CIMEL sun photometer integrated in the global Aerosols Robotic Network (AERONET) program. The present study investigates the aerosol properties during dust storm episodes over Jaipur, Northwestern India. A series of high dust storms were identified as indicated by high values of aerosols optical thickness (AOT) with a significant drop in angstrom exponent values (nearly zero and negative). Consequently, a progressive increase in Single Scattering Albedo (SSA440 nm = 0.89, SSA675 nm = 0.95, SSA870 nm = 0.97, SSA1020 nm = 0.976) suggests more scattering nature of regional aerosols associated with abundant dust loading. Trajectories back in time showed that the air collected in Jaipur during dust period originated from desert regions in the western part of India. Additionally, a comparative analysis of the mean AOT derived from satellite data and Potential Source Contribution Function (PSCF) analysis helped to understand the source region of these particles.

  7. Contemporary horizontal crustal movement estimation for northwestern Vietnam inferred from repeated GPS measurements

    NASA Astrophysics Data System (ADS)

    Duong, Nguyen Anh; Sagiya, Takeshi; Kimata, Fumiaki; To, Tran Dinh; Hai, Vy Quoc; Cong, Duong Chi; Binh, Nguyen Xuan; Xuyen, Nguyen Dinh

    2013-12-01

    We present a horizontal velocity field determined from a GPS network with 22 sites surveyed from 2001 to 2012 in northwestern Vietnam. The velocity is accurately estimated at each site by fitting a linear trend to each coordinate time series, after accounting for coseismic displacements caused by the 2004 Sumatra and the 2011 Tohoku earthquakes using static fault models. Considering the coseismic effects of the earthquakes, the motion of northwestern Vietnam is 34.3 ± 0.7 mm/yr at an azimuth of N108° ± 0.7°E in ITRF2008. This motion is close to, but slightly different from, that of the South China block. The area is in a transition zone between this block, the Sundaland block, and the Baoshan sub-block. At the local scale, a detailed estimation of the crustal deformation across major fault zones is geodetically revealed for the first time. We identify a locking depth of 15.3 ± 9.8 km with an accumulating left-lateral slip rate of 1.8 ± 0.3 mm/yr for the Dien Bien Phu fault, and a shallow locking depth with a right-lateral slip rate of 1.0 ± 0.6 mm/yr for the Son La and Da River faults.

  8. Impacts of surface water diversions for marijuana cultivation on aquatic habitat in four northwestern California watersheds.

    PubMed

    Bauer, Scott; Olson, Jennifer; Cockrill, Adam; van Hattem, Michael; Miller, Linda; Tauzer, Margaret; Leppig, Gordon

    2015-01-01

    Marijuana (Cannabis sativa L.) cultivation has proliferated in northwestern California since at least the mid-1990s. The environmental impacts associated with marijuana cultivation appear substantial, yet have been difficult to quantify, in part because cultivation is clandestine and often occurs on private property. To evaluate the impacts of water diversions at a watershed scale, we interpreted high-resolution aerial imagery to estimate the number of marijuana plants being cultivated in four watersheds in northwestern California, USA. Low-altitude aircraft flights and search warrants executed with law enforcement at cultivation sites in the region helped to validate assumptions used in aerial imagery interpretation. We estimated the water demand of marijuana irrigation and the potential effects water diversions could have on stream flow in the study watersheds. Our results indicate that water demand for marijuana cultivation has the potential to divert substantial portions of streamflow in the study watersheds, with an estimated flow reduction of up to 23% of the annual seven-day low flow in the least impacted of the study watersheds. Estimates from the other study watersheds indicate that water demand for marijuana cultivation exceeds streamflow during the low-flow period. In the most impacted study watersheds, diminished streamflow is likely to have lethal or sub-lethal effects on state- and federally-listed salmon and steelhead trout and to cause further decline of sensitive amphibian species. PMID:25785849

  9. Fire cue effects on seed germination of six species of northwestern Patagonian grasslands

    NASA Astrophysics Data System (ADS)

    Gonzalez, S. L.; Ghermandi, L.

    2012-09-01

    Postfire recruitment of seedlings has been attributed to a stimulation of germination by fire-related cues. The germination response to heat shock (80 °C - 5 min), smoke (60 min), the combination of both factors and no heat no smoke (control) was studied in six native species (two dominant grasses, two dominant shrubs and two annual fugitive herbs) of northwestern Patagonian grasslands. Seeds of the grasses Festuca pallescens and Stipa speciosa and the shrub Senecio bracteolatus (Asteraceae) germinated when they were exposed to heat shock, whereas seeds of the other shrub, Mulinum spinosum (Apiaceae), were killed by this fire cue. In grasses, probably the glume of caryopsis protected embryos from heat. Possibly, the seed size could explain the different responses of the two shrubs. Heat combined with smoke reduced seed germination for S. speciosa and S. bracteolatus. The heat could have scarified seeds and the longer exposure to smoke could have been toxic for embryos. The same treatment increased germination of the annual fugitive herb Boopis gracilis (Calyceraceae). We concluded that fire differentially affects the seedling recruitment of the studied species in the northwestern Patagonian grasslands.

  10. Ecology of petroleum platforms in the northwestern Gulf of Mexico: a community profile

    SciTech Connect

    Gallaway, B.J.; Lewbel, G.S.

    1982-07-01

    This community profile of petroleum platforms describes the structure and ecological function of petroleum platforms in the northwestern Gulf of Mexico. The profile proceeds from an introductory section describing the history of platform installation, structural properties, and their distribution in the northwestern Gulf of Mexico, to characterizations of the composition and biology of some of the major faunal groups on or around the platforms, to descriptions of structural attributes of petroleum platform communities, to observations of successional patterns and growth of the communities, to discussions of the ecosystem dynamics of the communities in terms of trophic linkage and biomass and carbon flows. In each of these sections, the effects of discharges from the active structures on the communities are described. The effects of the petroleum platform community on the surrounding soft-bottom communities are implicitly described throughout the profile, and explicitly addressed under the section describing the ecosystem dynamics. We then briefly summarize some of the values of production platform communities to man, and, in the final section of the text make an appeal that specific steps be taken to preserve an endangered biological resource: production platform communities.

  11. Seroprevalence of Toxoplasma gondii infection in dairy goats in Shaanxi Province, Northwestern China

    PubMed Central

    2011-01-01

    Background Toxoplasma gondii is an important zoonotic pathogen causing significant human and animal health problems. Infection in dairy goats not only results in significant reproductive losses, but also represents an important source of human infection due to consumption of infected meat and milk. In the present study we report for the first time seroprevalence of T. gondii infection in Guanzhong and Saanen dairy goats in Shaanxi province, Northwestern China. Results Sera from 751 dairy goats from 9 farms in 6 counties were examined for T. gondii antibodies with an indirect haemagglutination (IHA) test. Antibodies to T. gondii were detected in 106 (14.1%) serum samples, with antibody titres ranging from 1:64 to 1:1024. Seropositive goats were found in all 9 farms and seroprevalences in Guanzhong (16.3%, 75/461) and Saanen (10.7%, 31/290) dairy goats were not statistically significantly different. All the factors (sex, age and location) reported in the present study affected prevalence of infection, and seroprevalence increased with age, suggesting postnatal acquisition of T. gondii infection. Conclusions The results of the present survey indicate that infection by T. gondii is widely prevalent in dairy goats in Shaanxi province, Northwestern China, and this has implications for prevention and control of toxoplasmosis in this province. PMID:21457538

  12. A Survey of Phytoparasitic Nematodes on Cultivated and Non-Cultivated Plants in Northwestern Egypt

    PubMed Central

    Ibrahim, I. K. A.; Handoo, Z. A.; El-Sherbiny, A. A.

    2000-01-01

    Surveys were conducted in Alexandria, El-Behera, and Matrouh Governorates in northwestern Egypt during the 1994-1998 cropping seasons to study the occurrence, population density, host associations, and distribution of phytoparasitic nematodes associated with 35 major crops, grasses, and weeds. A total of 220 soil and root samples containing mixed populations of 26 genera and 38 species of phytoparasitic nematodes was analyzed; three known genera and 13 known species are reported for the first time in northwestern Egypt. Root-knot nematodes with 34 occurrences were the most frequently encountered group of nematodes, followed by spiral, stunt, ring, lesion, lance, and dagger nematodes with 19, 18, 15, 9, 8, and 7 occurrences, respectively. New species records are Boleodorus pakistanensis, Criconemella sphaerocephala, Discocriconemella sphaerocephaloides, Hemicriconemoides cocophilus, Hemicycliophora thienmanni, Hoplolaimus clarissimus, Irantylenchus clavidorus, Merlinius nanus, Paratylenchus projectus, Tylenchorhynchus ebriensis, Tylenchus afghanicus, T. exiguus, Xiphinema basilgoodeyi, and X. ensiculiferum. Survey results showed new host plant records for most of the identified nematode species in Egypt. PMID:19270998

  13. Vegetation and fire dynamics in different geological settings since the last ice age, Klamath Mountains, northwestern, CA

    Microsoft Academic Search

    C. Briles; C. Whitlock; P. Bartlein

    2006-01-01

    The Klamath Mountains of northwestern California are a floristic hotspot and their diversity likely results from a combination of geological, ecological and historical factors (e.g., long-term climate change). To evaluate how climate change has influenced past composition, structure, and disturbance regime of the Klamath forests in different geological settings, vegetation and fire histories from four sites, Bolan (1), Sanger (in

  14. Sandstone petrofacies in the northwestern sector of the Iberian Basin Petrofacies arenosas en el sector noroccidental de la Cuenca Ibérica

    Microsoft Academic Search

    J. Arribas; M. Ochoa; R. Mas; L. González-Acebrón

    During the most active rifting stages in the northwestern sector of the Iberian Basin (Cameros Basin and Aragonese Branch of the Iberian Range), thick sequences of continental clastic deposits were generated. Sandstone records from Rift cycle 1 (Permo-Trias- sic) and Rift cycle 2 (Late Jurassic-Early Cretaceous) show similarities in composition. Based on the most recent data, this paper describes sandstone

  15. Toxicity and heavy metal contamination of surficial sediments from the Bay of Thessaloniki (Northwestern Aegean Sea) Greece

    Microsoft Academic Search

    Konstantinos Zabetoglou; Demetra Voutsa; Constantini Samara

    2002-01-01

    Surficial sediments (the fraction<2000 ?m) from the Bay of Thessaloniki, in the Northwestern Aegean Sea, Greece were examined for heavy metal and organic carbon contents, as well as for acute LUMIStox® toxicity of pore waters (PWs), wet sediment elutriates (WSEs) and dry sediment elutriates (DSEs) obtained from the solid material remaining after PW extraction. WSEs where not toxic. EC20\\/50 values

  16. The genus Synchaeta (rotifers) in a north-western Mediterranean coastal lagoon (Etang de Thau, France): taxonomical and ecological remarks

    Microsoft Academic Search

    C. Rougier; R. Pourriot; T. Lam-Hoai

    2000-01-01

    During a survey of a north-western Mediterranean coastal lagoon, (the Etang de Thau, and at a nearby marine station, 1994–1998), six species of the genus Synchaetawere identified. The systematics of this illoricate genus is difficult and identification is virtually impossible in preserved material, although some indication may be obtained from an examination of the trophi after treatment with sodium hypochlorite.

  17. Geology of the ignimbrites and the associated volcano–plutonic complex of the Ezine area, northwestern Anatolia

    Microsoft Academic Search

    Z. Karacik; Y. Yilmaz

    1998-01-01

    The Ezine region is located in the northwestern part of Anatolia where young granitic and volcanic rocks are widespread and show close spatial and temporal association. In this region magmatism began with the Kestanbol granite, which intruded into metamorphic basement rocks, and formed contact metamorphic aureole. To the east and southeast the pluton is surrounded by hypabyssal rocks, which in

  18. To: All Northwestern University PIs From: Frank J. DiSanto, Associate Vice President for Research Operations

    E-print Network

    Engman, David M.

    .m. deadline, due to Grants.gov system limitations such as bandwidth and other data communication with these electronic research administration systems, resulting in the rejection of several electronic proposals to transition to Grants.gov. Please see the following link: http://www.research.northwestern.edu/research/osr/docs/DiSanto_memo_NIH_Electron

  19. Reference Services to Police Officer Students at the School of Police Staff and Command, Traffic Institute, Northwestern University

    Microsoft Academic Search

    Hema Ramachandran

    2001-01-01

    This paper focuses on the reference services provided by librarians at the Transportation Library for the police officer students enrolled in the School of Police Staff and Command, Traffic Institute, Northwestern University (Evanston, Illinois). Although this program is unique, the wealth of experience gained over several years can be useful for others who are planning and implementing services for adult

  20. TECTONICS, VOL. 14, NO. 4, PAGES 773-785, AUGUST 1995 Microseimicity and strain pattern in northwestern Greece

    E-print Network

    Hatzfeld, Denis

    in northwestern Greece DenisHatzfeld,·IannisKassaras,2DimitrisPanagiotopoulos,3DanielAmorese,I KostasMakropoulos,2 Epirus, Akarnania, and the Ionian islands of westernGreece, we located approximately 600 earthquakes continents collide in Apulia and northern Greece[i.e., McKenzie, 1972]. It is moreover boundedby

  1. Floating debris in the Ligurian Sea, north-western Mediterranean Stefano Aliani a,*, Annalisa Griffa a,b

    E-print Network

    Griffa, Annalisa

    Floating debris in the Ligurian Sea, north-western Mediterranean Stefano Aliani a,*, Annalisa sightings of large floating debris are presented, taken in the Ligurian Sea, a sub-basin of the north, floating debris is a problem for a number of reasons (Laist, 1987; Derrail, 2002): debris can snare boat

  2. Possible Vector Dissemination by Swift Foxes following a Plague Epizootic in Black-tailed Prairie Dogs in Northwestern Texas

    Microsoft Academic Search

    Brady K. McGee; Matthew J. Butler; Danny B. Pence; James L. Alexander; Janet B. Nissen

    To determine whether swift foxes (Vulpes velox) could facilitate transmission of Yersinia pestis to uninfected black-tailed prairie dog (Cynomys ludovicianus) colonies by ac- quiring infected fleas, ectoparasite and sero- logic samples were collected from swift foxes living adjacent to prairie dog towns during a 2004 plague epizootic in northwestern Texas, USA. A previous study (1999-2001) indicated that these swift foxes

  3. Plant frequency, stem and root characteristics, and CO 2 uptake for Opuntia acanthocarpa : elevational correlates in the northwestern Sonoran Desert

    Microsoft Academic Search

    Park S. Nobel; Edward G. Bobich

    2002-01-01

    A common cylindropuntia in the northwestern Sonoran Desert, Opuntia acanthocarpa, was investigated for the following hypotheses: its lower elevational limit is set by high temperatures, so its seedlings require nurse plants; its upper elevational limit is set by freezing; spine shading is the least at intermediate elevations; and changes in plant size and frequency with elevation reflect net CO2 uptake

  4. Disintegration of the continental margin of northwestern Gondwana: Late Devonian of the eastern Anti-Atlas (Morocco)

    Microsoft Academic Search

    Jobst Wendt

    1985-01-01

    The Devonian early Carboniferous sequence in the eastern Anti-Atlas represents a complete record of the last stage of the depositional and tectonic evolution along the northwestern margin of Gondwana. As a consequence of early Variscan block faulting, a platform and basin topography was established during the Middle and Late Devonian. Platforms were covered by condensed cephalopod limestones; sedimentation in the

  5. [Digenea of Haliaeetus albicilla (Linnaeus, 1758) and Pandion haliaetus (Linnaeus, 1758) from middle and north-western Poland].

    PubMed

    Kalisi?ska, Elzbieta; Rzad, Izabella; Sitko, Jilji; Kavetska, Katarzyna M; Królaczyk, Katarzyna; Budis, Halina

    2008-01-01

    In 2003-2008 eight white-tailed eagles and two ospreys from middle and north-western Poland were examined for the presence of parasites. Nine birds were infected with 5 digenean species: Conodiplostomum perlatum, Paracoenogonimus ovatus, Strigeafalconis, Metorchis crassiusculus and Nematostrigea serpens. M. crassiusculus was found for the first time in an eagle from Poland. PMID:19338229

  6. Towards an integration of conventional land evaluation methods and farmers’ soil suitability assessment: a case study in northwestern Syria

    Microsoft Academic Search

    N Cools; E De Pauw; J Deckers

    2003-01-01

    Adaptation of land use to the potentialities and constraints of local agroecologies is a key principle of sustainable land management. Farmers and land resource professionals assess the options that optimise the productivity and sustainable land use through different knowledge systems. Both systems have advantages and drawbacks. Through a case study in a village of northwestern Syria, an approach was developed

  7. Department of Industrial Engineering and Management Sciences Northwestern University, Evanston, Illinois 60208-3119, U.S.A.

    E-print Network

    Hazen, Gordon

    2006). This paper focuses on last-mile logistical operations in a humanitarian relief chain, which Engineering and Management Sciences, Northwestern University December 2010 #12;ABSTRACT In humanitarian relief operations, vehicle routing and supply allocation decisions are critically important. Similar routing

  8. INCIDENCE OF TRYPANOSOMA CRUZI INFECTION AMONG CHILDREN FOLLOWING DOMESTIC REINFESTATION AFTER INSECTICIDE SPRAYING IN RURAL NORTHWESTERN ARGENTINA

    Microsoft Academic Search

    RICARDO E. GÜRTLER; MARÍA C. CECERE; MARTA A. LAURICELLA; ROSARIO M. PETERSEN; ROBERTO CHUIT; ELSA L. SEGURA; JOEL E. COHEN

    Following increasing reinfestation with Triatoma infestans after insecticide spraying, the household inci- dence of infection with Trypanosoma cruzi in children was positively related to the domestic abundance of infected T. infestans and the presence or proportion of infected dogs or cats in Amamá, a rural village in northwestern Argentina. Seven (12.1%) children seronegative for antibodies to T. cruzi at baseline,

  9. The use of a single lichen species, Hypogymnia physodes, as an indicator of air quality in northwestern Ontario

    Microsoft Academic Search

    H. N. Pfeiffer; P. Barclay-Estrup

    2009-01-01

    Samples of an epiphytic lichen, Hypogymnia physodes (L.) Nyl., were collected from 26 sites around the city of Thunder Bay in northwestern Ontario in the summer of 1987, and analyzed for Al, As, Cd, Cu, Fe, Hg, Pb, S and Zn. Overall levels of contaminants were low. Areas to the southwest of Thunder Bay had the highest levels of contaminants.

  10. Crustal thickness estimates of Northwestern South America and their relation to the presence of batholithic bodies of economy interest

    Microsoft Academic Search

    O. Hernandez; R. R. von Frese; L. M. Potts

    2007-01-01

    A new model for the crustal evolution of northwestern South America (-8 S to 23.5 N, -90 W to -58.5 W) was developed from gravity derived MOHO depth estimates and tectonic features interpreted from correlative geopotential anomalies and seismic data. Crustal thickness estimates provide important constraints on the distribution of volcanic and seismic hazards, and mineral and energy deposits. Crustal

  11. Department of Industrial Engineering and Management Sciences Northwestern University, Evanston, Illinois, 60208-3119, U.S.A.

    E-print Network

    Hazen, Gordon

    to being di cult to swap with the vehicle's depleted battery, and roadside charging services are either-klabjan@northwestern.edu Abstract Recharging decisions for electric vehicles require many special considerations due to battery dynam- ics. Battery longevity is prolonged by recharging less frequently and at slower rates, and also

  12. Genetic diversity of sea buckthorn ( Hippophae rhamnoides ) populations in northeastern and northwestern China as revealed by ISSR markers

    Microsoft Academic Search

    Chunjie Tian; Yidong Lei; Suhua Shi; Peng Nan; Jiakuan Chen; Yang Zhong

    2004-01-01

    As a N2-fixing tree species, sea buckthorn (Hippophae rhamnoides) is well adapted to arid regions and is utilized for multiple purposes in China. Current knowledge of genetic variability of H. rhamnoides is limited in terms of rangewide distributions. Eleven natural populations of sea buckthorn in northeastern and northwestern China were analyzed to detect genetic variation among and within populations, by

  13. 75 FR 3487 - Notice of Public Meeting: Recreation Subcommittee of the Sierra Front-Northwestern Great Basin...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-21

    ...Subcommittee of the Sierra Front-Northwestern Great Basin...proposals at the Red Rock Canyon National Conservation Area (NCA) Scenic...lands and waters according to a national interagency agreement between...Supervisor, Humboldt-Toiyabe National Forest. [FR Doc....

  14. Paleostress analyses in NW Syria: constraints on the Cenozoic evolution of the northwestern margin of the Arabian plate

    Microsoft Academic Search

    Andrea Zanchi; Giovanni Battista Crosta; Abdul Nasser Darkal

    2002-01-01

    Fault analysis between the Dead Sea Transform and the Euphrates region in northern Syria shows two main directions of compression connected to the recent evolution of the northwestern wedge of the Arabian plate. E–W open folds due to N–S compression gently deform the Cretaceous to Tortonian successions of the Aleppo Plateau and the eastern termination of the Palmyrides west of

  15. An Integrated Multi-Institutional Diabetes Prevention Program Improves Knowledge and Healthy Food Acquisition in Northwestern Ontario First Nations

    ERIC Educational Resources Information Center

    Ho, Lara S.; Gittelsohn, Joel; Rimal, Rajiv; Treuth, Margarita S.; Sharma, Sangita; Rosecrans, Amanda; Harris, Stewart B.

    2008-01-01

    This article presents the impact results of a feasibility study in Canada for prevention of risk factors for diabetes in seven northwestern Ontario First Nations. Baseline and follow-up data were collected before and after the 9-month intervention program in schools, stores, and communities that aimed to improve diet and increase physical activity…

  16. Characterization of water quality for streams in the southern Yampa River basin, northwestern Colorado. Water Resources Investigation

    Microsoft Academic Search

    1991-01-01

    Historically, the Yampa River basin in northwestern Colorado has been an area of coal-mining development. Coal mining generally has been developed in the southern part of the basin and at lower elevations. The purpose of the report is to characterize the stream water quality by summarizing selected major dissolved constituents for the streams that drain the southern part of the

  17. Nymphal Growth, Life Cycle, and Feeding Habits of Potamanthus luteus (Linnaeus, 1767) (Insecta: Ephemeroptera) in the Bormida River, Northwestern Italy

    Microsoft Academic Search

    Stefano Fenoglio; Tiziano Bo; José Manuel Tierno de Figueroa; Marco Cucco

    Stefano Fenoglio, Tiziano Bo, José Manuel Tierno de Figueroa, and Marco Cucco (2008) Nymphal growth, life cycle, and feeding habits of Potamanthus luteus (Linnaeus, 1767) (Insecta: Ephemeroptera) in the Bormida River, northwestern Italy. Zoological Studies 47(2): 185-190. Potamanthus luteus (Linnaeus, 1767), the only representative of the family Potamanthidae in Europe, exhibits explosive growth in terms of its numerical presence and

  18. Amphiplex Formation

    NASA Astrophysics Data System (ADS)

    Petersen, Shannon; Laaser, Jennifer; Lodge, Timothy

    2015-03-01

    Polymer-micelle complexes are currently under heavy investigation due to their potential applications in targeted drug delivery and gene therapy, yet the dynamics of the complex formation is still relatively unstudied. By varying the ratios of poly(styrene sulfonate) chains and cationic poly(dimethylaminoethyl methacrylate)-b-poly(styrene) micelles and the ionic strength of the system, we created a variety of complex configurations of different sizes and charges. The complexes were characterized dynamic light scattering and zeta potential measurements which provided information regarding the hydrodynamic radius, distribution of sizes, and effective charge.

  19. The 55- to 60-ka Te Whaiau Formation: a catastrophic, avalanche-induced, cohesive debris-flow deposit from Proto-Tongariro Volcano, New Zealand

    Microsoft Academic Search

    Jérôme A. Lecointre; Vincent E. Neall; Cleland R. Wallace; Warwick M. Prebble

    2002-01-01

    Te Whaiau Formation is a massive volcaniclastic deposit interbedded within gravelly and sandy volcanogenic sediments of the northwestern Tongariro ring plain. The ca. 0.5-km3 deposit comprises a clay-rich, matrix-supported diamicton with lithological and physical properties that are typical of a cohesive debris-flow deposit. Clays identified in the matrix are derived from hydrothermally altered andesite lava and pyroclastic rocks. The distribution

  20. Hydrogeochemical and vertical electrical soundings for groundwater investigations, Burg El-Arab area, Northwestern Coast of Egypt

    NASA Astrophysics Data System (ADS)

    Atwia, Mohamed G.; Abu-Heleika, Mohamed M.; El-Horiny, Mohamed M.

    2013-04-01

    An integrated geological, hydrochemical, and geoelectrical investigation of shallow groundwater occurrence in Burg El-Arab area, northwestern coastal zone of Egypt is carried out. Groundwater of oolitic limestone and clastic aquifers is the principal source of water supply for agriculture in the area. The purpose of this study is to describe the hydrogeologic characteristics of aquifers and to provide a general evaluation of the chemical quality of water in aquifers. Chemical analysis was used to evaluate the chemical characteristics of groundwater and assessment of water quality. Electrical soundings were employed to delineate different water bearing formations and the configuration of the interface between them. Thirty-four water samples were collected and chemically analyzed from the two main aquifers in the area. Groundwaters of oolitic limestone aquifer are dominated by NaCl and have average TDS of approximately 2830 mg/l. Groundwater samples from clastic aquifer are slightly weakly mineralized (TDS approximately 2700 mg/l) and dominated by CaSO4. The hydrochemical data indicate that the groundwater is of meteoric origin. The variation in the chemistry of water is thought to be related to the weathering of minerals of the water-bearing sediments, mixing with marine water, and leaching of fertilizers in the newly reclaimed areas. Groundwater of the area can be used for irrigation under special circumstances management as the sodium hazard is medium while the salinity hazard ranges from high to very high. Thirty-four profiles of vertical electrical soundings (VESs) were obtained in Burg El-Arab area to examine the variations of subsurface geology and associated groundwater chemistry. Resistivity and thickness of aquifers, resistivity of the unsaturated zone and depth to the confining bed have been delineated from the interpretation of electrical sounding data. The range of electrical resistivity values have been assigned to different layers by calibrating electrical resistivity with the borehole data. Results of the vertical electrical soundings and the hydrochemistry of the groundwater samples show that the brackish groundwater is dominated in the study area whereas the fresh groundwater is found as isolated patches in oolitic limestone aquifer.

  1. Geothermal and compositional variety of old oceanic upper mantle in northwestern Pacific: Insights from seafloor magnetotelluric experiments

    NASA Astrophysics Data System (ADS)

    Utada, H.; Baba, K.; Tada, N.; Shimizu, H.; Zhang, L.; Liang, P.

    2014-12-01

    Oceanic upper mantle beneath the northwestern Pacific has large-scale lateral heterogeneity that is impossible to attribute to just an age-dependency of the thermal structure based on a cooling of homogeneous mantle with age. This surprising fact was revealed from seafloor magnetotelluric (MT) data collected in three areas, northwest (Area A) and southeast (Area B) of the Shatsky Rise, and off the Bonin Trench (Area C), through the Normal Oceanic Mantle Project and the Stagnant Slab Project. One-dimensional structures of electrical conductivity representing each area show significant difference in the thickness of the upper resistive layer that may be interpreted as cool lithosphere. The thickness of the layer that is more resistive than 0.01 S m-1 is ~80 km for Area A, ~110 km for Area B, and ~180 km for Area C. The conductivity below the resistive layer is similar to ~0.03 S m-1 for Areas A and C but a slightly higher than it for Area B. The thermal structures for the lithospheric age representing the areas (130, 140, and 147 Ma for Areas A, B, and C, respectively) predicted from a simple plate cooling model are almost identical and thus cannot reproduce such variations in electrical conductivity. Then, in this study, thermal and compositional states of the mantle beneath the three areas were investigated to discuss the cause of the variations. Combination of five model parameters, electrical conductivity of crust, mantle potential temperature, thickness of thermally conductive plate, and H2O and CO2 contents in the asthenospheric mantle were searched by forward modeling and the ?2 misfit between the MT responses observed and predicted were assessed with 95% acceptable level. The possibility of partial melting was taken into account by comparing to the solidus of peridotite that is reduced by H2O and CO2. We assumed that the mantle conductivity may be represented by the mixture of hydrous olivine and hydrous carbonated melt. The results suggest a possible influence of a mantle up-welling associated with the formation of the Shatsky Rise to the mantle beneath Areas A and B although these areas are away from the bathymetric anomaly.

  2. Origin of the Early Permian zircons in Keping basalts and magma evolution of the Tarim Large Igneous Province (northwestern China)

    NASA Astrophysics Data System (ADS)

    Li, Yin-Qi; Li, Zi-Long; Yu, Xing; Langmuir, Charles H.; Santosh, M.; Yang, Shu-Feng; Chen, Han-Lin; Tang, Zhong-Li; Song, Biao; Zou, Si-Yuan

    2014-09-01

    The Tarim continental flood basalts (CFBs) provide important clues about the genesis and magmatic evolution of the Early Permian Tarim Large Igneous Province (Tarim LIP) in northwestern China. Here we present results of LA-MC-ICPMS Lu-Hf isotope analysis on Early Permian (ca. 290 Ma) zircons extracted from the Tarim CFBs in the Keping area, northwest of the Tarim Basin. Zircons from two sub-groups of Keping basalts (Groups 1a and 1b) have similar Lu-Hf isotopic compositions and exhibit a relatively large range of 176Hf/177Hf ratios between 0.282422 and 0.282568. Their negative ?Hf(t) values (- 6.8-- 1.4) are generally lower than the whole-rock ?Hf(t) values of their host basalts (- 2.8-2.1), and are distinct from other known intrusive rocks (- 0.3-7.1) in the Tarim LIP and their hosted zircons (4.9-8.8). Systematic studies of Hf isotopic data from Tarim and its adjacent regions reveal that these zircons are probably xenocrysts, sourced from coeval igneous rocks in the South Tianshan Orogen (e.g., the Lower Permian Xiaotikanlike Formation volcanic and pyroclastic rock suite). This, together with the presence of Precambrian zircons in Keping basalts, clearly indicates crustal contamination during their eruptions and provides hints about the potential contaminant sources. Geochemical modeling further suggests that the earlier erupted Group 1b basalts experienced more contamination, predominantly by some high Th-U-Pb rock components, most likely from the South Tianshan Orogen. The later erupted Group 1a basalts in the Keping area have been less contaminated with mainly the Tarim Precambrian rocks. Another group of the Tarim CFBs in the Northern Tarim Uplift (Group 2) appears to have undergone negligible crustal contamination but possesses evidence for variable source compositions. The modeling also indicates that the uncontaminated parental magmas of various Tarim LIP rocks (from the picrites and basalts to ultramafic-mafic and syenitic intrusive rocks) exhibit a wide range of ?Nd(t) values (ca. - 5-5), reflecting source isotopic heterogeneity, which may be a consequence of plume-lithosphere interaction during the generation of the Tarim LIP.

  3. Three-dimensional inversion of EarthScope MT data collected over the northwestern United States

    NASA Astrophysics Data System (ADS)

    Cuma, M.; Zhdanov, M. S.; Gribenko, A.; Marie, G.

    2012-12-01

    We have inverted magnetotelluric (MT) data collected in nine states of the northwestern United States as a part of the EarthScope project for 3D imaging of electrical resistivity to a depth of 500 km using recent advances in extremely large-scale electromagnetic modeling and inversion. 3D inversion was applied to the EarthScope MT data collected at 260 stations over an area extending from ?123° W to ?105° W and from ?38° N to ?49° N. We used cells with a horizontal discretization of 10 km by 10 km, and a vertical discretization starting from 1 km at the surface and logarithmically increasing with depth. The inversion domain contained 2,138,400 cells, and had an initial model of a 100 ohm-m half space. In our inversion we fit both the amplitude and phase of all four components of the impedance tensors for 16 periods logarithmically spaced between 10 s and 10,000 s. The results of our mega-cell 3D inversion reveal multi-scale geoelectrical inhomogeneities in the upper mantle closely related to major known tectonic features. Our geoelectrical model clearly shows a resistive structure associated with the Juan de Fuca slab subducting beneath the northwestern United States, and the conductive zone of partially melted material above the subducting slab due to the release of fluids from the downgoing slab. We observe extensive areas of moderate-to-high conductive asthenosphere below 100 to 200 km. The geoelectrical model also shows a prominent conductive feature associated with the partially melted mantle plume-like layer of the Yellowstone hotspot. These results correlate reasonably well with P-wave and S-wave velocity models independently obtained from seismic tomography. We acknowledge that our geoelectrical model of the northwestern United States represents just one of the first models obtained from 3D inversion of EarthScope MT data. Such large-scale MT inversions are extremely complex, and require significant additional efforts to fully model, understand, and interpret the EarthScope MT data.

  4. Formation Scenarios

    E-print Network

    Rosemary F. G. Wyse

    1999-11-18

    I discuss various proposed formation scenarios for the metal-poor components of the Milky Way Galaxy, emphasising the stellar halo and the thick disk. Interactions and accretion played a significant role in Galactic evolution, in particular at earlier epochs. The present observations favour a scenario by which the thick disk formed through the heating of a pre-existing thin stellar disk, with the heating mechanism being the merging of a satellite galaxy. A remnant `moving group' of the satellite would provide strong support for this scenario, and may have been detected. The field stars in the stellar halo probably formed in early small-scale star-forming regions, which subsequently disrupted. Late accretion is not important for the bulk of the stellar halo. The stellar initial mass function shows no evidence of variations, and indeed shows evidence of being invariant, even in companion satellite galaxies.

  5. Post-rift tectonic reactivation and its effect on deep-water deposits in the Qiongdongnan Basin, northwestern South China Sea

    NASA Astrophysics Data System (ADS)

    Mao, Kainan; Xie, Xinong; Xie, Yuhong; Ren, Jianye; Chen, Hui

    2015-01-01

    The post-rift evolution of extensional basins is traditionally thought to be dominated by thermal subsidence due to cessation of the major fault activity during the post-rift stage. The Qiongdongnan Basin, which is located in the northwestern continental margins of the South China Sea, has exhibited significant deviations from typical post-rift characteristics. In the basin, a distinct tectonic reactivation occurred since the Late Miocene (11.6 Ma). Three notable aspects of the observed tectonic reactivation during the post-rift stage include, (1) pre-existing fault reactivation, (2) multiple large-scale magmatic intrusions, and (3) rapid post-rift subsidence. During this period the basin infill significantly changed in depositional environments shifting rapidly from littoral-neritic to bathyal-abyssal environments since Late Miocene. The pre-existing fault activity along the No. 2 fault of the basin resulted in the formation of initial shelf breaks and led to the development of continental slope. In addition, the pre-existing faults along the Central Depression zone created a small sub-basin with distinctive axial negative topography characteristics formed between structural highs. These geomorphological changes led to the formation of the Central Canyon. Large-scale magmatic intrusions occurred along the fault zone in the Central Depression of the basin during the post-rift stage. Those deviations, as evidenced from pre-existing fault reactivation, magmatic intrusions, and rapid post-rift subsidence in the Qiongdongnan Basin is believed to be related to the Hainan Plume event.

  6. Paleomagnetism of the late Cryogenian Nantuo Formation and paleogeographic implications for the South China Block

    NASA Astrophysics Data System (ADS)

    Zhang, Shihong; Evans, David A. D.; Li, Haiyan; Wu, Huaichun; Jiang, Ganqing; Dong, Jin; Zhao, Qingle; Raub, Timothy D.; Yang, Tianshui

    2013-08-01

    A new paleomagnetic pole position is obtained from the well-dated (636.3 ± 4.9 Ma) Nantuo Formation in the Guzhang section, western Hunan Province, and the correlative Long'e section in eastern Guizhou Province, South China. Remagnetization of the recent geomagnetic field was identified and removed for both sections. The hard dual-polarity, interpreted as primary, component of the Nantuo Formation, directs east-westward with medium inclinations, yielding an average pole of 9.3°N, 165°E, A95 = 4.3° that, for the first time, passed a strata-bound reversals test. The new data are consistent with previously published paleomagnetic data of the Nantuo Formation from Malong county, central Yunnan Province, which passed a positive syn-sedimentary fold test. Together, these sites represent shallow- to deep-water sections across a shelf-to-basin transect centered at ˜33° paleolatitude. The sedimentary basin may have faced an expansive ocean toward the paleo-East. In the ˜750 Ma and ˜635 Ma global reconstructions, the South China Block (SCB) was best fitted in the northern hemisphere close to northwestern Australia. However, a direct SCB-northwestern Australia connection, inferred to have existed during the Early Cambrian-Early Devonian, had not formed by the time of ˜635 Ma.

  7. US Applicant ~ US Applicant ~ US Applicant ~ US Applicant ~ US Applicant ~ US Applicant ~ 02/12 Northwestern University's Feinberg School of Medicine

    E-print Network

    Contractor, Anis

    Requirements for US Medical Students: Prospective students for the Visiting Clerkship program: Must Center of Northwestern University welcome students from diverse backgrounds from the Classes of 2012US Applicant ~ US Applicant ~ US Applicant ~ US Applicant ~ US Applicant ~ US Applicant ~ 02

  8. Redistribution of the geographical ranges of the Iberian cyprinid genus Pseudochondrostoma based on a phylogenetic analysis: implications for the historical rearrangements of the north-western Iberian drainages.

    PubMed

    Aboim, M A; Cunha, C; Coelho, M M

    2009-04-01

    A new distribution range is proposed for Pseudochondrostoma polylepis and Pseudochondrostoma duriense based on the phylogeny of two nuclear and one mitochondrial gene sequences, with implications on the geographic history of the north-western Iberian drainages. PMID:20735635

  9. Habitat use, growth, and mortality of post-settlement lane snapper (Lutjanus synagris) on natural banks in the northwestern Gulf of Mexico 

    E-print Network

    Mikulas, Joseph John

    2009-05-15

    Three low-relief banks (Heald Bank, Sabine Bank, Freeport Rocks) in the northwestern Gulf of Mexico were evaluated as lane snapper (Lutjanus synagris Linnaeus, 1758) nursery habitat. Trawl surveys were conducted in three ...

  10. An Identification Key to Rodent Prey in Owl Pellets from the Northwestern and Southeastern United States: Employing Incisor Size to Distinguish among Genera

    ERIC Educational Resources Information Center

    Hager, Stephen B.; Cosentino, Bradley J.

    2006-01-01

    We present an identification key to the common rodent prey found in owl pellets from the Northwestern (NW) and Southeastern (SE) United States that is based on differences in incisor size (arc diameter) among genera.

  11. Graphically characterizing the movement of a rabid striped skunk epizootic across the landscape in northwestern Wyoming.

    PubMed

    Ramey, Craig A; Mills, Kenneth W; Fischer, Justin W; McLean, Robert G; Fagerstone, Kathleen A; Engeman, Richard M

    2013-09-01

    A striped skunk (Mephitis mephitis) rabies epizootic in northwestern Wyoming was studied from the Index Case in 1988 to the last case in 1993, and possibly is the first rabies epizootic in a previously rabies-free zone monitored from beginning to end. The 843 km(2) study area comprised skunk habitat along 90 km of Shoshone River's floodplain from Bighorn Lake upstream to Cody. Of 1,015 skunks tested, 215 were rabies-positive. Integrating spatial and temporal data from positive cases, we analyzed the epizootic's movements and dynamics at 6-month intervals using multivariate movement maps, a new multivariate descriptive methodology presented here to demonstrate the epizootic's directional flow, while illustrating areas with higher case densities (i.e., wave crests). This approach should help epidemiologists and public health officials to better understand future rabies epizootics. PMID:23812724

  12. Molecular species identification of spiny lobster phyllosoma larvae of the genus Panulirus from the northwestern Pacific.

    PubMed

    Chow, Seinen; Suzuki, Nobuaki; Imai, Hideyuki; Yoshimura, Taku

    2006-01-01

    To identify lobster phyllosoma larvae of the genus Panulirus occurring in waters adjacent to Japan, genetic variation within and between 10 Indo-Pacific lobster species was investigated using restriction fragment length polymorphism (RFLP) analysis for the 1300-base pair mitochondrial cytochrome oxidase I (COI) gene. RFLP analysis using two endonucleases (AluI and TaqI) enabled discrimination of all species, including the P. longipes complex. The diagnostic DNA markers, supplemented with nucleotide sequence analysis, were applied to 44 mid- to late-stage phyllosoma larvae (7.4 to 27.7 mm in body length) collected in the northwestern Pacific. These samples were unexpectedly variable in species composition, comprising P. japonicus (n = 16), P. longipes bispinosus (21), P. longipes longipes (1), P. "aka" (1), and P. penicillatus (5). Comparison of larval size at similar stages revealed that P. l. bispinosus larvae were significantly larger than P. japonicus. PMID:16555028

  13. Mercury levels in raccoons (Procyon lotor) from the Warta Mouth National Park, northwestern Poland.

    PubMed

    Lanocha, Natalia; Kalisinska, Elzbieta; Kosik-Bogacka, Danuta I; Budis, Halina; Podlasinska, Joanna; Jedrzejewska, Ewa

    2014-06-01

    This is the first report on mercury (Hg) levels in the liver, kidney, skeletal muscle, and brain of raccoon in Europe. It studied Hg concentration in 24 raccoons from the Warta Mouth National Park, northwestern Poland by atomic absorption spectroscopy (AAS). The highest total Hg concentrations in the raccoon were found in the liver (maximum, 18.45 mg/kg dry weight), while the lowest in the brain (maximum, 0.49 mg/kg dw). In adult raccoons, Hg concentrations in the liver, kidney, and brain were higher than in immature individuals (p<0.001), while similar in skeletal muscle in both age groups. Our results are consistent with studies by other authors conducted in North America in areas with similar environmental conditions. PMID:24736978

  14. Statistical analysis of seismic data from north-western and western Argentina

    NASA Astrophysics Data System (ADS)

    Osella, A. M.; Sabbione, N. C.; Cernadas, D. C.

    1992-06-01

    Due to the process of subduction of the Nazca Plate, high seismic activity is observed near the Argentine Andean range between 21°S and 36°S. The new version of the Argentine Seismic Catalogue, which includes well-defined events during the period 1964 1989, allows us to perform an analysis of seismic risk. Earthquakes with epicenters in the provinces included in the north-western and western regions were studied using Gumbel III extreme value distribution. Modal extreme magnitudes and return periods were calculated for both regions and the results were compard with the ones obtained through the entire process techniques (both analytical and graphical). As a first study, we analyzed each province separately, after which mean values for each region were obtained. Modal values around 5 5.5 have been found and times of recurrence for events with m b >6 of approximately 25 years were obtained.

  15. Radioiodine retention in ovine thyroids in northwestern Greece following the reactor accident at Chernobyl

    SciTech Connect

    Ioannides, K.G.; Pakou, A.A.; Papadopoulou, C.V. (Univ. of Ioannina (Greece))

    1991-04-01

    Iodine-131 concentrations were measured throughout the summer of 1986 in thyroids of lambs slaughtered at Ioannina (Northwestern Greece) following the accident at the Chernobyl nuclear reactor. During the survey, 40 thyroids were collected. The highest level of 131I detected was 2471 +/- 339 Bq per thyroid. The thyroids of 20 lambs did not contain detectable 131I concentrations, while the contamination content of the others was greatly variable. The transport of 131I from pasture to thyroids of lambs has been described through a simple model for the retention of 131I in the glands. The transfer coefficient fT, expressing the steady-state equilibrium, was estimated to be 564 +/- 270 kg-1 d. This result reflects the sensitivity of animal thyroids as biological radioiodine monitors.

  16. The first radiocarbon data of bone remains of mammoth faunal forms in northwestern Russia

    NASA Astrophysics Data System (ADS)

    Nikonov, A. A.; van der Plicht, J.

    2010-05-01

    Unlike in the neighboring territories, the distribution and the period of habitation of late Pleistocene mammoth complex animals in the northwestern area of Russia had not been studied until recently. This article fills in this gap using the bone material from the Zoological Institute of the Russian Academy of Sciences and the collections of one of the authors. The samples of 14 bones and teeth of big mammals uncovered in different places of the region were dated. The data obtained by conventional 14C method and AMS method agree with each other and make it possible to determine two periods of habitation of mammoth complex animals in the region: 39 000-23 000 years ago and 13 000-9800 years ago, which confirms that ice-free landscapes existed here at these time intervals.

  17. Epidemiology of human brucellosis in a defined area of Northwestern Greece.

    PubMed Central

    Avdikou, I.; Maipa, V.; Alamanos, Y.

    2005-01-01

    Despite a European co-financial programme for control and eradication of brucellosis in Southern Europe, there is evidence that foci of brucellosis still exists in Greece and other Southern European countries. Human brucellosis cases are probably underreported in these countries. A local surveillance system was implemented in a defined region of Northwestern Greece, in order to record and study all human brucellosis cases, using several sources of retrieval. A total of 152 newly diagnosed cases were recorded during a 2-year study period (from 1 April 2002 to 31 March 2004). The age- and sex-adjusted mean annual incidence rate for the population of the study area was 17.3 cases/10(5) inhabitants. Incomplete application of the control and eradication programme in livestock, and the possible illegal trafficking of animals and their products across the Greek-Albanian border could be responsible for the persistence of foci of brucellosis in the area. PMID:16181512

  18. Distribution of the amphibian pathogen Batrachochytrium dendrobatidis in the Pacific Northwestern USA

    USGS Publications Warehouse

    Pearl, Christopher A.; Bull, E.L.; Green, D.E.; Bowerman, Jay; Adams, Michael J.; Hyatt, A.; Wente, W.

    2007-01-01

    Chytridiomycosis (infection by the fungus Batrachochytrium dendrobatidis) has been associated with amphibian declines in at least four continents. We report results of disease screens from 210 pond-breeding amphibians from 37 field sites in Oregon and Washington. We detected B. dendrobatidis on 28% of sampled amphibians, and we found a?Y 1 detection of B. dendrobatidis from 43% of sites. Four of seven species tested positive for B. dendrobatidis, including the Northern Red-Legged Frog (Rana aurora), Columbia Spotted Frog (Rana luteiventris), and Oregon Spotted Frog (Rana pretiosa). We also detected B. dendrobatidis in nonnative American Bullfrogs (Rana catesbeiana) from six sites in western and central Oregon. Our study and other recently published findings suggest that B. dendrobatidis has few geographic and host taxa limitations among North American anurans. Further research on virulence, transmissibility, persistence, and interactions with other stressors is needed to assess the potential impact of B. dendrobatidis on Pacific Northwestern amphibians.

  19. Factors associated with self-reported symptoms of acute pesticide poisoning among farmers in northwestern Jamaica

    PubMed Central

    Ncube, Ngqabutho M.; Fogo, Christopher; Bessler, Patricia; Jolly, Curtis M.; Jolly, Pauline E.

    2011-01-01

    Pesticide poisoning is a major public health concern in developing countries. We conducted a population survey among farmers in three parishes of northwestern Jamaica to determine the occurrence of acute pesticide poisoning and to identify factors associated with pesticide poisoning. Approximately 16% of 359 farmers who participated in the study reported one or more incidents of acute pesticide poisoning within the last two years. Only 25% of the farmers reported ever receiving training in pesticide handling or safety. The majority (68%) of farmers who reported pesticide poisoning never sought medical attention for poisoning. The factors found to be associated with pesticide poisoning in this study indicate that implementation of specific intervention strategies and education of farmers is needed in order to improve safe handling, use and disposal of pesticides and reduce incidents of acute pesticide poisoning. PMID:24484363

  20. New records of Cantharellus species from the northwestern Himalayas of India

    PubMed Central

    Deepika, Kumari; Reddy, M. Sudhakara; Upadhyay, Ramesh C.

    2014-01-01

    This study investigated several collections of the genus Cantharellus (Cantharellaceae) from the northwestern Himalayas, India, on the basis of morphology and molecular data. Phylogenetic relationships and species limits were investigated by using nuclear ribosomal large subunit sequences (LSU). We recognized 13 species: Cantharellus appalachiensis Petersen, C. cibarius Fries, C. lateritius (Berk) Singer, C. miniatescens Heinem, C. minor Peck, C. pseudoformosus and seven species, C. applanatus sp. nov., C. elongatipes sp. nov., C. fibrillosus sp. nov., C. himalayensis sp. nov., C. indicus sp. nov., C. natarajanii sp. nov., and C. umbonatus sp. nov., as new to science. All these species are described and their taxonomy and ecology are discussed. In addition, a key is provided to all the recognized species. The phylogenetic analysis recovered 10 major supported clades of Cantharellus species. PMID:24587961

  1. Phylogeography of the finless porpoise (genus Neophocaena): testing the stepwise divergence hypothesis in the northwestern Pacific

    PubMed Central

    Lin, Wenzhi; Frère, Céline H.; Karczmarski, Leszek; Xia, Jia; Gui, Duan; Wu, Yuping

    2014-01-01

    We used 344 mitochondrial control region (717?bp) sequences from the finless porpoise (genus Neophocaena) from the northwestern Pacific to investigate the extent and manner in which past climatic oscillations may have shaped patterns of genetic diversity for this marine mammal. Both SplitsTree and Analysis of Molecular Variance (AMOVA) revealed the presence of a deep divergence among N. phocaenoides in subtropical waters compared with N. asiaeorientalis in temperate waters. Results from Migrate-n indicated that migration increased along the continent during the early Pleistocene period. Migration increased, although to a lesser extent than that during the Pleistocene, along the marginal shelf in the Yellow/Bohai Sea during the Last Glacial Maximum (LGM) due to a shortening coastline. Our results suggest that the current patterns of genetic diversity of Neophocaena vary at a hierarchy on a temporal and spatial scale, and phylogeographic history should be taken into account when examining species population structure and taxonomy. PMID:25303422

  2. Gastro-intestinal nematode infections in a goat breeding farm in north-western Sri Lanka.

    PubMed

    Van Aken, D; De Bont, J; Vercruysse, J; Dorny, P

    1990-11-01

    Faecal egg counts were used to study patterns of nematode infestation of adult female goats and their offspring according to season, pregnancy and lactation or age on a goat farm (n = 2000) in north-western Sri Lanka. Average rainfall in the area is 825 mm and temperature is between 23 and 33 degrees C throughout the year. The only nematode species present on the farm were Haemonchus contortus and Oesophagostomum columbianum. In adult females the faecal egg output was not influenced by season and no significant periparturient rise was observed. In kids the egg counts rose from the third month of age onwards and reached the same levels as the adults by the fourth month. Post-mortem studies on a neighbouring farm indicated that hypobiosis was not present. PMID:2288007

  3. [Spatial structure of natural foci of hantavirus on the territory of Northwestern Caucasus].

    PubMed

    Okulova, N M; Khliap, L A; Varshavski?, A A; Dzagurova, T K; Iunicheva, Iu V; Riabova, T E; Baskevich, M I; Vasilenko, L E; Tkachenko, E A

    2013-01-01

    For the period from 2001 to 2011 zoological and epizootological studies in more than 100 points of Northwestern Caucasus including territories of Krasnodar Region and Republic of Adygea were carried out. 8723 specimens of small mammals represented by 20 rodent species and 7 insectivorous species were captured and examined. Organs and blood from 5057 specimens of creatures were studied for hantavirus infection. The presence of natural foci of circulation of 2 species of hantavirus--Dobrava/Belgrade and Tula--was established. Sochi viruses and presumably Kurkin with main natural hosts--Caucasian wood and field mice belong to the first species. Tula and Adler viruses with the main host--Microtus genus vole belong to the second species. Quantitative characteristics of infection of small mammals of various species during different seasons and years on the examined territories were obtained, that allowed to create a map of allocation of foci of hantavirus circulation that differ by structure. PMID:24605654

  4. Use of domesticated pigs by Mesolithic hunter-gatherers in northwestern Europe

    PubMed Central

    Krause-Kyora, Ben; Makarewicz, Cheryl; Evin, Allowen; Flink, Linus Girdland; Dobney, Keith; Larson, Greger; Hartz, Sönke; Schreiber, Stefan; von Carnap-Bornheim, Claus; von Wurmb-Schwark, Nicole; Nebel, Almut

    2013-01-01

    Mesolithic populations throughout Europe used diverse resource exploitation strategies that focused heavily on collecting and hunting wild prey. Between 5500 and 4200 cal BC, agriculturalists migrated into northwestern Europe bringing a suite of Neolithic technologies including domesticated animals. Here we investigate to what extent Mesolithic Ertebølle communities in northern Germany had access to domestic pigs, possibly through contact with neighbouring Neolithic agricultural groups. We employ a multidisciplinary approach, applying sequencing of ancient mitochondrial and nuclear DNA (coat colour-coding gene MC1R) as well as traditional and geometric morphometric (molar size and shape) analyses in Sus specimens from 17 Neolithic and Ertebølle sites. Our data from 63 ancient pig specimens show that Ertebølle hunter-gatherers acquired domestic pigs of varying size and coat colour that had both Near Eastern and European mitochondrial DNA ancestry. Our results also reveal that domestic pigs were present in the region ~500 years earlier than previously demonstrated. PMID:23982268

  5. Acadian remobilization of a Taconian ophiolite, Hare Bay allochthon, northwestern Newfoundland

    SciTech Connect

    Cadwood, P.A. (Memorial Univ. of Newfoundland, St. Johns's (Canada))

    1989-03-01

    The Hare Bay fault is a major subhorizontal detachment at the base of the ophiolitic St. Anthony Complex in the Hare Bay allochthon, northwestern Newfounland. The fault is a postmetamorphic brittle detachment that truncates footwall structures related to both initial Ordovician (Taconian) assembly of the allochthon and subsequent Silurian-Devonian (Acadian) deformation. Although previously mapped as a thrust, the fault has an extensional rather than a contractional geometry; it cuts downsection to the west in the direction of transport, and it juxtaposes a hanging-wall sequence that contains little or no Acadian deformation against a footwall sequence that was pervasively deformed during the Acadian orogeny. The St. Anthony Complex lies on the western margin of the Acadian deformed zone. Its final emplacement, through movement on the Hare Bay fault, probably occurred through extensional faulting during gravitational collapse of the Acadian mountain front.

  6. Phylogeography of the finless porpoise (genus Neophocaena): testing the stepwise divergence hypothesis in the northwestern Pacific.

    PubMed

    Lin, Wenzhi; Frère, Céline H; Karczmarski, Leszek; Xia, Jia; Gui, Duan; Wu, Yuping

    2014-01-01

    We used 344 mitochondrial control region (717?bp) sequences from the finless porpoise (genus Neophocaena) from the northwestern Pacific to investigate the extent and manner in which past climatic oscillations may have shaped patterns of genetic diversity for this marine mammal. Both SplitsTree and Analysis of Molecular Variance (AMOVA) revealed the presence of a deep divergence among N. phocaenoides in subtropical waters compared with N. asiaeorientalis in temperate waters. Results from Migrate-n indicated that migration increased along the continent during the early Pleistocene period. Migration increased, although to a lesser extent than that during the Pleistocene, along the marginal shelf in the Yellow/Bohai Sea during the Last Glacial Maximum (LGM) due to a shortening coastline. Our results suggest that the current patterns of genetic diversity of Neophocaena vary at a hierarchy on a temporal and spatial scale, and phylogeographic history should be taken into account when examining species population structure and taxonomy. PMID:25303422

  7. Eriophyoid mites from Qinghai Province, northwestern China with descriptions of nine new species (Acari, Eriophyoidea)

    PubMed Central

    Li, Hao-Sen; Xue, Xiao-Feng; Hong, Xiao-Yue

    2012-01-01

    Abstract Eriophyoid mites from Qinghai Province, northwestern China were studied herein. Up to now, only six species have been reported from Qinghai Province. In field surveys, 17 eriophyoid mite species were collected, among which nine species were found new to science. The new species and their host plants are listed as follows: Acaphyllisa tuberculumae sp. n. on Populus sp. (Salicaceae); Proiectus xiningensis sp. n. on Pinus sp. (Pinaceae); Phyllocoptes beishaniensis sp. n. on Spiraea mongolica Maxim. (Rosaceae); Tetra pruniana sp. n. on Prunus tomentosa Thunb. (Rosaceae) Rupr. (Berberidaceae); Tetra pyriana sp. n. on Pyrus calleryana Decne. (Rosaceae); Tetra simonia sp. n. on Populus simonii Carr. (Salicaceae); Diptacus berberinus sp. n. on Berberis amurensis Rupr. (Berberidaceae); Diptacus mengdaensis sp. n. on Lonicera elisae Franch. (Caprifoliaceae); Rhyncaphytoptus spinus sp. n. on Lonicera rupicola Hook. f. et Thoms. (Caprifoliaceae). Aculops ulmi Hong & Xue, 2005 was re-described. PMID:22679390

  8. Preventive health care of Indian preschoolers in the Sioux Lookout Zone, northwestern Ontario.

    PubMed Central

    Plaxton, K.; Shah, C. P.; Young, T. K.; Bain, H. W.

    1983-01-01

    The provision of preventive health care to native children in the Sioux Lookout Zone of northwestern Ontario was assessed by reviewing the medical charts of 568 randomly selected preschoolers in 1980. Data were collected on the method of infant feeding; immunization status, vaccination and testing for tuberculosis; development, vision and hearing screening; monitoring of growth; and nutritional status and vitamin supplementation. Most of the children had been breast-fed and had received primary diphtheria-pertussis-tetanus-polio immunization as well as measles-mumps-rubella and bacille Calmette-Guérin vaccination. However, less than 30% had undergone developmental screening, and only 10% and 8% respectively had had their vision and hearing screened. Growth monitoring was adequate in the first year of life but not thereafter. Only about 55% of the children had ever had a hemoglobin level determined. More emphasis on health promotion is needed if native children are to receive adequate preventive health care. PMID:6671184

  9. Genetic evidence of hantavirus infections in wild rodents from northwestern Colombia.

    PubMed

    Londoño, Andres F; Díaz, Francisco J; Agudelo-Flórez, Piedad; Levis, Silvana; Rodas, Juan D

    2011-06-01

    This report builds on recent serological evidence for the presence of hantavirus in northern Colombia by providing sequence-specific and phylogenetic data of hantavirus infections in wild rodents. From August 2007 to August 2008, 354 rodent specimens representing four families were collected in the northwestern Antioquia region of Colombia. Antibodies reactive to Sin Nombre virus and Maciel virus antigens by IgG enzyme-linked immunosorbent assay were found in 15 of 109 (14%) Cherries cane rats (Zygodontomys cherriei), the only sigmodontinae rodents captured. Lung tissue samples from 11 of the 15 seropositive rodents were RT-polymerase chain reaction positive for hantavirus RNA, using primers for the S and M genome segments. Eight of these amplicons were sequenced and phylogenetic analyses indicated RNA of a hantavirus closely related to Calabazo virus, previously found in Panama. This is the first report of the genetic characterization of a hantavirus in rodents in Colombia. PMID:21284514

  10. Soil-Transmitted Helminth Infections and Associated Risk Factors among Schoolchildren in Durbete Town, Northwestern Ethiopia

    PubMed Central

    Alelign, Tilahun; Degarege, Abraham; Erko, Berhanu

    2015-01-01

    Identifying determinants of soil transmitted helminth infection is vital to design control strategy for the disease. This study assessed the prevalence of STH infections and associated factors among schoolchildren in Durbete town, northwestern Ethiopia. Data about the sociodemographic and socioeconomic status of the children were collected using a questionnaire and stool samples were diagnosed using thick Kato-Katz smear. STH infection was more common among school-age children in Durbete town. Hookworm was the most frequent helminth species detected. The prevalence of STH infection was more in children who did not practice wearing shoes and washing hands before eating and in those who were older in age. Deworming of school-age children in the study area would be important. In addition, provision of health education about helminths and the importance of wearing shoes and washing hands before eating would be important to reduce the burden of STH infection in the study area.

  11. SALINITY AND SODICITY INTERACTIONS OF WEATHERED MINESOILS IN NORTHWESTERN NEW MEXICO AND NORTH EASTERN ARIZONA

    SciTech Connect

    Brent Musslewhite; Song Jin

    2006-05-01

    Weathering characteristics of minesoils and rooting patterns of key shrub and grass species were evaluated at sites reclaimed for 6 to 14 years from three surface coal mine operations in northwestern New Mexico and northeastern Arizona. Non-weathered minesoils were grouped into 11 classifications based on electrical conductivity (EC) and sodium adsorption ratio (SAR). Comparisons of saturated paste extracts, from non-weathered and weathered minesoils show significant (p < 0.05) reductions in SAR levels and increased EC. Weathering increased the apparent stability of saline and sodic minesoils thereby reducing concerns of aggregate slaking and clay particle dispersion. Root density of four-wing saltbush (Atriplex canascens), alkali sacaton (Sporobolus airoides), and Russian wildrye (Psathyrostachys junceus) were nominally affected by increasing EC and SAR levels in minesoil. Results suggest that saline and sodic minesoils can be successfully reclaimed when covered with topsoil and seeded with salt tolerant plant species.

  12. Northwestern Agricultural

    E-print Network

    Maxwell, Bruce D.

    , near Creston 4570 MT Hwy 35, Kalispell, MT 59901 Time: Approx. mid-May to end of August, flexible faculty and staff with crop production research in both field and laboratory settings. Field work includes to work independently and as part of a team Good communication skills Valid Montana drivers' license

  13. Cultural Transmission of Traditional Knowledge in two populations of North-western Patagonia

    PubMed Central

    Eyssartier, Cecilia; Ladio, Ana H; Lozada, Mariana

    2008-01-01

    Background In the present study we have investigated the cultural transmission of two types of traditional plant knowledge in two communities of North-western Patagonia, Argentina. In the Pilcaniyeu community, we studied the transmission of traditional knowledge related to horticultural practices in home-gardens, greenhouses and gardens; while in the community of Cuyin Manzano, we studied wild plant gathering customs. Methods Ethnobotanical fieldwork was conducted by means of semi-structured interviews, in which we investigated which plants are used, at what life history phase was learned, modes of transmission and who the principal transmitters were in childhood and adulthood. In both communities, each of this three aspects related to cultural transmission were categorized and the frequencies of each category were obtained. The total number of species recorded in each community was also calculated. Frequencies were analyzed with the Chi-square test of independence. Results and discussion In both communities, transmission of traditional plant knowledge begins at an early age, as a family custom, in which women play a predominant role. Wild plant use and horticultural knowledge continue to be learned during adulthood. This was particularly registered associated with horticultural learning, which receives greater influence from extension agents who are introducing new practices and technology. This outside influence, which implies novelty, could imply syncretism but also traditional knowledge loss. Conclusion Given the remarkable acculturation processes occurring at present in rural communities of Northwestern Patagonia, it might be of vital importance to document traditional knowledge of ancient practices. Moreover, it could be interesting to share our results with both populations in order to encourage participatory activities within the communities which could enhance traditional knowledge horizontal transmission, particularly among elder adults and youngsters. PMID:19077315

  14. The Land Cover Dynamics and Conversion of Agricultural Land in Northwestern Bangladesh, 1973-2003.

    NASA Astrophysics Data System (ADS)

    Pervez, M.; Seelan, S. K.; Rundquist, B. C.

    2006-05-01

    The importance of land cover information describing the nature and extent of land resources and changes over time is increasing; this is especially true in Bangladesh, where land cover is changing rapidly. This paper presents research into the land cover dynamics of northwestern Bangladesh for the period 1973-2003 using Landsat satellite images in combination with field survey data collected in January and February 2005. Land cover maps were produced for eight different years during the study period with an average 73 percent overall classification accuracy. The classification results and post-classification change analysis showed that agriculture is the dominant land cover (occupying 74.5 percent of the study area) and is being reduced at a rate of about 3,000 ha per year. In addition, 6.7 percent of the agricultural land is vulnerable to temporary water logging annually. Despite this loss of agricultural land, irrigated agriculture increased substantially until 2000, but has since declined because of diminishing water availability and uncontrolled extraction of groundwater driven by population pressures and the extended need for food. A good agreement (r = 0.73) was found between increases in irrigated land and the depletion of the shallow groundwater table, a factor affecting widely practiced small-scale irrigation in northwestern Bangladesh. Results quantified the land cover change patterns and the stresses placed on natural resources; additionally, they demonstrated an accurate and economical means to map and analyze changes in land cover over time at a regional scale, which can assist decision makers in land and natural resources management decisions.

  15. Birds and their ticks in northwestern California: minimal contribution to Borrelia burgdorferi enzootiology.

    PubMed

    Slowik, T J; Lane, R S

    2001-08-01

    Birds and their attendant ticks were surveyed for infection with the Lyme disease spirochete Borrelia burgdorferi, in chaparral and woodland-grass habitats in northwestern California from March to July, 1998 to 1999. In total, 234 birds were captured and recaptured (15%); nearly 2.5 times more birds were captured in chaparral than in woodland-grass. Overall, 34 species representing 15 families were collected during this study; of these, 24 species were caught in chaparral, 19 in woodland-grass, and 9 in both vegetational types. The most frequently captured birds were sage sparrows (Amphispiza belli) in chaparral, and American robins (Turdus migratorius) and oak titmice (Baelophus inornatus) in woodland-grass. Birds hosted 35 Ixodes pacificus (15 larvae, 20 nymphs) and 9 Haemaphysalis leporispalustris (3 larvae, 5 nymphs, 1 adult) ticks, of which 32 were removed from chaparral birds and 12 from woodland birds. The prevalence of tick infestation was 13% (21/167) in chaparral and 5% (3/67) in woodland-grass, but the relative and mean tick intensities of 0.19 and 1.5 for chaparral birds, and 0.18 and 4.0 for woodland birds, respectively, did not differ significantly by habitat. Spirochetes were not detected in either bird-blood or tick-tissue samples when tested by culture, immunofluorescence, or Giemsa-staining. In contrast, over 90% (86/94) of western fence lizards (Sceloporus occidentalis) collected in June or July were infested with an average of 6.9 and 8.9 immature I. pacificus in chaparral and woodland-grass, respectively. We conclude that birds contribute little to the enzootiology of B. burgdorferi in chaparral and woodland-grass habitats in northwestern California because of their limited parasitism by tick vectors and lack of detectable spirochetemias. PMID:11534638

  16. Metasomatic origin for the genesis of the latest Miocene-Quaternary intraplate basalts in northwestern Syria

    NASA Astrophysics Data System (ADS)

    Ma, G. S.; Malpas, J.; Xenophontos, C.; Suzuki, K.

    2010-12-01

    Late Miocene to Quaternary intraplate alkaline-transitional basalts from the Al Ghab and Homs regions, northwestern Syria, have a relatively limited range in Nd-Sr-Pb isotopic compositions [143Nd/144Nd = 0.51284-0.51299 (?Nd = +4.0 to +6.9), 87Sr/86Sr = 0.7031-0.7036 and 206Pb/204Pb = 18.72-19.59] but a wide range in initial 187Os/188Os (0.17-0.76). Despite the latter, the chemistry and isotopic variations of these basalts suggest a relatively minor role for crustal contamination (<6% of upper continental crust, likely with Late Proterozoic Arabian Shield characteristics), but source heterogeneity, in the generation of these rocks. Among the least crustally contaminated and relatively primitive samples, basanites are characterised by marked depletion of K, Rb and Zr relative to other neighbouring incompatible elements on the primitive mantle normalised diagrams. This, together with their low SiO2 and high TiO2 and MREE/HREE, is consistent with magma genesis involving a large proportion of hornblendite or similar amphibole-rich metasomatic material. On the other hand, the alkali and tholeiitic basalts with the highest SiO2, lowest TiO2, weakest negative K, Rb and Zr anomalies, and moderately high MREE/HREE are consistent with melt extraction from a largely peridotitic mantle. It is suggested that the compositional spectrum from basanite, via alkali basalts to tholeiitic basalts can be explained by melts produced from lithospheric mantle with decreasing wall rock-metasomatic vein ratios, and subsequent mixing with asthenospheric mantle melts. This is supported by the identification of three distinct isotopic and chemical characteristics of the lavas, each of which can be referred to a unique mantle source (metasomatic vein, lithospheric wall-rock peridotite mantle and asthenospheric peridotite mantle) which together are responsible for the genesis of the alkaline-transitional magmas in northwestern Syria.

  17. Sensitivity analysis of seismic hazard for the northwestern portion of the state of Gujarat, India

    USGS Publications Warehouse

    Petersen, M.D.; Rastogi, B.K.; Schweig, E.S.; Harmsen, S.C.; Gomberg, J.S.

    2004-01-01

    We test the sensitivity of seismic hazard to three fault source models for the northwestern portion of Gujarat, India. The models incorporate different characteristic earthquake magnitudes on three faults with individual recurrence intervals of either 800 or 1600 years. These recurrence intervals imply that large earthquakes occur on one of these faults every 266-533 years, similar to the rate of historic large earthquakes in this region during the past two centuries and for earthquakes in intraplate environments like the New Madrid region in the central United States. If one assumes a recurrence interval of 800 years for large earthquakes on each of three local faults, the peak ground accelerations (PGA; horizontal) and 1-Hz spectral acceleration ground motions (5% damping) are greater than 1 g over a broad region for a 2% probability of exceedance in 50 years' hazard level. These probabilistic PGAs at this hazard level are similar to median deterministic ground motions. The PGAs for 10% in 50 years' hazard level are considerably lower, generally ranging between 0.2 g and 0.7 g across northwestern Gujarat. Ground motions calculated from our models that consider fault interevent times of 800 years are considerably higher than other published models even though they imply similar recurrence intervals. These higher ground motions are mainly caused by the application of intraplate attenuation relations, which account for less severe attenuation of seismic waves when compared to the crustal interplate relations used in these previous studies. For sites in Bhuj and Ahmedabad, magnitude (M) 7 3/4 earthquakes contribute most to the PGA and the 0.2- and 1-s spectral acceleration ground motion maps at the two considered hazard levels. ?? 2004 Elsevier B.V. All rights reserved.

  18. Deformation of the Western Caribbean and Northwestern South America From GPS Geodesy

    NASA Astrophysics Data System (ADS)

    LaFemina, Peter; Mora-Paez, Hector; Kobayashi, Daisuke; Fernandes, Rui; Mothes, Patricia

    2014-05-01

    We investigate the current kinematics of the western Caribbean and northwestern South America, two regions that are affected by ongoing collision of aseismic ridges and the motion of forearc slivers. We investigate these regions using a new PS derived surface velocity field spanning from Guatemala to Ecuador. The new velocity field and published earthquake slip vectors are inverted to solve for the Euler vectors of forearc blocks and interseismic elastic strain accumulation on block bounding faults using a block modeling approach. Along the western Caribbean margin, it has been demonstrated that the Cocos Ridge collision drives the Central American forearc block to the northwest. GPS network expansion in Panama and Colombia allows us to investigate the effect of ridge collision on the Panama region. In northwestern South America, the North Andes block (NAB) is a hypothesized tectonic block that migrates north-northeast relative to a stable South American reference frame. The motion of this block is thought to be derived by the collision of the Carnegie Ridge in southern Ecuador or by oblique convergence and high degrees of interplate coupling north of the ridge (i.e., strain partitioning). We test a suite of block models to investigate the tectonic nature of the Panama Region and North Andes block and the style of faulting in the upper plate accommodating block motion. Through the estimation of elastic strain accumulation on all block bounding faults, we improve the understanding of interseismic coupling along a convergent margin capable of producing M>8 earthquake and upper plate faults capable of M>6 earthquake.

  19. Methylmercury in flood-control impoundments and natural waters of northwestern Minnesota, 1997-99

    USGS Publications Warehouse

    Brigham, M.E.; Krabbenhoft, D.P.; Olson, M.L.; DeWild, J.F.

    2002-01-01

    We studied methylmercury (MeHg) and total mercury (HgT) in impounded and natural surface waters in northwestern Minnesota, in settings ranging from agricultural to undeveloped. In a recently constructed (1995) permanent-pool impoundment, MeHg levels typically increased from inflow to outflow during 1997; this trend broke down from late 1998 to early 1999. MeHg levels in the outflow reached seasonal maxima in mid-summer (maximum of 1.0 ng L-1 in July 1997) and late-winter (maximum of 6.6 ng L-1 in February 1999), and are comparable to high levels observed in new hydroelectric reservoirs in Canada. Spring and autumn MeHg levels were typically about 0.1-0.2 ng L-1. Overall, MeHg levels in both the inflow (a ditch that drains peatlands) and outflow were significantly higher than in three nearby reference natural lakes. Eleven older permanent-pool impoundments and six natural lakes in northwestern Minnesota were sampled five times. The impoundments typically had higher MeHg levels (0.071-8.36 ng L-1) than natural lakes. Five of six lakes MeHg levels typical of uncontaminated lakes (0.014-1.04 ng L-1) with highest levels in late winter, whereas a hypereutrophic lake had high levels (0.37-3.67 ng L-1) with highest levels in mid-summer. Seven temporary-pool impoundments were sampled during summer high-flow events. Temporary-pool impoundments that retained water for about 10-15 days after innundation yielded pronounced increases in MeHg from inflow to outflow, in one case reaching 4.6 ng L-1, which was about 2 ng L-1 greater than the mean inflow concentration during the runoff event.

  20. Mosquito surveillance in northwestern Italy to monitor the occurrence of tropical vector-borne diseases.

    PubMed

    Pautasso, A; Desiato, R; Bertolini, S; Vitale, N; Radaelli, M C; Mancini, M; Rizzo, F; Mosca, A; Calzolari, M; Prearo, M; Mandola, M L; Maurella, C; Mignone, W; Chiavacci, L; Casalone, C

    2013-11-01

    Mosquito-borne arboviruses (MBV) represent an important health problem, causing diseases and deaths both in human and animals mainly in tropical and subtropical countries. In recent years, they have emerged also in temperate regions where they have caused epidemics. Of mounting concern among public health authorities in Europe are zoonotic mosquito-borne viruses belonging to the Flavivirus genus. The aim of this study was to carry out active surveillance on mosquitoes in two regions of northwestern Italy (Liguria and Piedmont) to gain a better knowledge of the mosquito populations by identifying potential vectors of arboviruses and to investigate arbovirus infection. A network of 61 CO? CDC traps was placed in the study area; sampling was conducted from May to October 2011. A total of 46,677 mosquitoes was collected, identified to species level, and classified according to their vector competence. Mosquitoes collected from 16 traps, selected according to risk-based factors, were tested by biomolecular analysis to detect flavivirus infection. This study highlights the importance of entomological surveillance in northwestern Italy because most of the mosquitoes collected were found to have high vector competence. Moreover, the risk-based virological surveillance allowed to detect the presence of mosquito flavivirus RNA, phylogenetically closely related to the MMV Spanish isolate, in three pools and USUV RNA in one pool in new areas where it has not been reported previously. The availability of continuous data on mosquito populations provides invaluable information for use in cases of an epidemic emergency. Maintenance of this integrated system for the next years will provide stronger data that can inform the design of a risk-based surveillance for the early detection of the occurrence of outbreaks of tropical MBDs. PMID:24589116