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1

Multi-component reflection survey with MEMS accelerometer for Vp/Vs estimation across the Kitakami Lowland, Northeast Japan  

NASA Astrophysics Data System (ADS)

The geometry of geological structure and the velocity distribution in sedimentary layers are very important information for the earthquake disaster prevention. The S wave velocity in sedimentary layers is fundamental to estimate strong ground motions which likely damage the human activity. Multi-component reflection survey can provide more information about rock properties and occasionally better subsurface image than using only conventional PP reflections. In this study, we applied PS imaging and tomographic inversion to land 3C reflection seismic data in order to estimate the Vp/Vs ratio and Vs structures in sedimentary layers across the Kitakami Lowland (KL), northeast Japan. The KL is located at the eastern edge of the Miocene rift system of northern Honshu Island. The western marginal faults are commonly recognized as active reverse faults re-activated after crustal stretching during Miocene back arc spreading and subsequent lithospheric cooling. The multi-component data were acquired on a 20 km-long seismic survey line across the KL with 800 three-component MEMS accelerometers with 25 m spacing, and 175 vibrator shots. In data processing, the vertical component is used for the conventional PP reflection imaging, and the radial component from each shot point after azimuth rotation is used for the PS conversion imaging. The obtained seismic sections from PP and PS processing clearly show the subsurface structures from the sedimentary layers to the basement and the form of west dipping listric faults. The Vp/Vs ratio is estimated by direct event matching of interpreted horizons between two seismic sections in time domain. We could estimate Vp/Vs from 2.1 to 3.3 up to 3km in depth above the basement. Furthermore, S wave velocity can be calculated from the P wave velocity model and the estimated Vp/Vs ratio. Refraction traveltime tomography using the first arrival time of P and S waves directly solves Vp and Vs structures. By comparing the Vp and Vs tomograms, we obtained the detailed Vp/Vs ratio in shallow zone in sedimentary layers up to about 1km in depth. The multi-component reflection survey with the PS converted wave analysis and the refraction traveltime tomography, the Vp/Vs ratio and the S wave structure are reasonably estimated which are useful information for the earthquake disaster prevention.

Shiraishi, K.; Abe, S.; Saito, H.; Sato, H.; Koshiya, S.; Kato, N.; Kawanaka, T.

2009-12-01

2

South Kitakami region: An allochthonous Terrane in Japan  

Microsoft Academic Search

The pre-Cretaceous geology of the Japanese Island may be interpreted as an accretion complex in which many terranes of several origins are juxtaposed and a number of allochthonous blocks are involved. The South Kitakami and Abukuma regions of northeast Japan, and probably also Silurian and Devonian blocks in the Kurosegawa fault zone and the border fault zone of the Hida

Yasuji Saito; Mitsuo Hashimoto

1982-01-01

3

Large-scale displacement along the Median Tectonic Line, Japan: evidence from SHRIMP zircon U–Pb dating of granites and gneisses from the South Kitakami and paleo-Ryoke belts  

Microsoft Academic Search

In this paper we present new U–Pb zircon ages determined with Sensitive High-Resolution Ion MicroProbe (SHRIMP) for nine plutonic rocks or orthogneisses and one paragneiss from the Higo and Maana belts (here referred to as the paleo-Ryoke belt) in southwest Japan, and the South Kitakami belt in northeast Japan. Both belts are Paleozoic–Mesozoic continental terranes discontinuously distributed along the Median

Toshihiko Sakashima; Kentaro Terada; Toru Takeshita; Yuji Sano

2003-01-01

4

Identification of remagnetization processes in Paleozoic sedimentary rocks of the northeast Rhenish Massif in Germany by KAr dating and REE tracing of authigenic illite and Fe oxides  

Microsoft Academic Search

This study combines mineralogical, chemical (rare earth elemental (REE)) and isotopic (K-Ar) data of clay minerals as well as chemical compositions (major and REE) of Fe oxide leachates from remagnetized Palaeozoic sedimentary rocks from NE Rhenish Massif in Germany, for which the causes of remagnetization are not yet clear. The dominant carrier of the syntectonic, pervasive Carboniferous magnetization is magnetite.

A. Zwing; N. Clauer; N. Liewig; V. Bachtadse

2009-01-01

5

Large-scale displacement along the Median Tectonic Line, Japan: evidence from SHRIMP zircon U-Pb dating of granites and gneisses from the South Kitakami and paleo-Ryoke belts  

NASA Astrophysics Data System (ADS)

In this paper we present new U-Pb zircon ages determined with Sensitive High-Resolution Ion MicroProbe (SHRIMP) for nine plutonic rocks or orthogneisses and one paragneiss from the Higo and Maana belts (here referred to as the paleo-Ryoke belt) in southwest Japan, and the South Kitakami belt in northeast Japan. Both belts are Paleozoic-Mesozoic continental terranes discontinuously distributed along the Median Tectonic Line (MTL), and structurally lying on the Sambagawa belt in the Japanese Islands. Three groups of U-Pb zircon ages showing the timing of different magmatic events were determined for the plutonic rock or orthogneiss samples: ca. 500 Ma (Early Ordovician, two samples), a mean age of 292.0±12.4 Ma (Late Carboniferous-Early Permian, one sample) and ca. 110 Ma (Early Cretaceous, six samples). Furthermore, zircons with core-rim microstructures from a garnet-biotite-cordierite paragneiss in the Higo belt were also dated with SHRIMP. The cores yielded 2155-184 Ma inherited U-Pb ages (mostly varying between 330 and 184 Ma), while the rims yielded a mean age of 116.5±18.7 Ma (Early Cretaceous) U-Pb recrystallization ages comparable with the igneous ages, limiting the sedimentary age of the protolith to between Early-Middle Jurassic (ca. 180 Ma) and Early Cretaceous time. These SHRIMP U-Pb ages of plutonism, metamorphism and sedimentation, together with previously reported radiometric ages, have revealed a strong similarity in the tectonic histories of the paleo-Ryoke and South Kitakami and Abukuma belts, suggesting that these belts can be correlated. At present the paleo-Ryoke belt and the South Kitakami and Abukuma belts are separated by more than 1000 km. However, these belts may have originally comprised a continuous continental terrane that was later displaced and juxtaposed, together with the underlying Sambagawa belt, against the Ryoke belt by large-scale sinistral faulting along the MTL and associated major strike-slip faults during the Latest Cretaceous.

Sakashima, Toshihiko; Terada, Kentaro; Takeshita, Toru; Sano, Yuji

2003-07-01

6

Ichthyofauna of the Kubo, Tochikura, and Ichinono river systems (Kitakami River drainage, northern Japan), with a comparison of predicted and surveyed species richness  

PubMed Central

Abstract The potential fish species pool of the Kubo, Tochikura, and Ichinono river systems (tributaries of the Iwai River, Kitakami River drainage), Iwate Prefecture, northern Japan, was compared with the observed ichthyofauna by using historical records and new field surveys. Based on the literature survey, the potential species pool comprised 24 species/subspecies but only 20, including 7 non-native taxa, were recorded during the fieldwork. The absence during the survey of 11 species/subspecies from the potential species pool suggested either that sampling effort was insufficient, or that accurate determination of the potential species pool was hindered by lack of biogeographic data and ecological data related to the habitat use of the species. With respect to freshwater fish conservation in the area, Lethenteron reissneri, Carassius auratus buergeri, Pseudorasbora pumila, Tachysurus tokiensis, Oryzias latipes, and Cottus nozawae are regarded as priority species, and Cyprinus rubrofuscus, Pseudorasbora parva, and Micropterus salmoides as targets for removal.

Nakae, Masanori; Senou, Hiroshi

2014-01-01

7

The tectonics of anorthosite massifs  

NASA Technical Reports Server (NTRS)

Anorthosite massifs developed approximately 1.4 to 1.5 billion years ago along an arch which developed parallel to a zone of continental separation as a block which included North America, Europe, and probably Asia separated from a block which included parts of South America, Africa, India, and Australia. Anorthosite massifs also developed at the same time along a belt which runs through the continents which comprise Gondwanaland (South America), Africa, India, Australia, and Antarctica. This was a zone of continental separation which subsequently became a zone of continental collision about 1.2 billion years ago. The northern anorthosite belt also parallels an orogenic belt which was active between 1.8 and 1.7 billion years ago. Heat generated during this mountain building period helped in the formation of the anorthosites.

Seyfert, C. K.

1981-01-01

8

Structure of late Variscan Millevaches leucogranite massif in the French Massif Central: AMS and gravity modelling  

E-print Network

imprint of the extensional Variscan belt collapse on the internal fabric of Millevaches granites than of the main processes of material and heat transfer in the continental crust. In the Massif Central, granites­SE trend of the Variscan belt. The Millevaches granite massif is affected by large ductile shear zones

Boyer, Edmond

9

Structural style of cretaceous compression in the northern Bohemian massif of eastern Germany  

SciTech Connect

The Bohemian massif was subjected to regional compressional stresses during Late Cretaceous Alpine, Dinaric, and Carpathian tectonic events. Older Mesozoic extensional and Variscan compressional fault planes were reactivated as decollement surfaces during this Late Cretaceous compression. Seismic profiles and geologic data suggest that Cretaceous faults are rooted in low-angle detachments and predominately compressional. In addition, an sinistral shear component is oriented oblique to the northwest-striking compressional component. The northern extremity of the Bohemian massif in eastern Germany is represented by the Thuringen, Harz, Flechtinger, and Calvoerde basement uplifts. The Thuringen block is bordered by a southwest-verging thrust fault, whereas the other three features are formed by a series of northeast-verging, northwest-striking, thrust faults. The Calvoerde structure is the northeasternmost basement-rooted feature in the Bohemian massif. As this structure approaches the Variscan Altmark paleohigh to the northwest, the fault decreases its throw and forms a lateral ramp. In the central European depression and Subhercynian basins, compressional stresses are transferred to decollement surfaces within Zechstein evaporites, creating halokenetic structures and reverse faults. The application of a compressional model creates additional hydrocarbon exploration opportunities in traditional reservoirs such as the Rotliegendes and Carboniferous in northern Germany. The model allows for the reinterpretation of some of the normal faults as oblique reverse shear faults. This holds particularly true for normal faults associated with Cretaceous halokenetic structures. The additional reverse and thrust faults will generate in inventory of previously untested footwall traps.

Rigo, L.; Welker-Haddock, M. (Maxus Energy, Dallas, TX (United States))

1993-09-01

10

Geology and Tectonic Evolution of the Kazdag Massif (NW Anatolia)  

Microsoft Academic Search

In the northwestern part of Anatolia along the Izmir-Ankara Suture Zone, the Kazdag and Uludag metamorphic massifs form an E-W trending belt between the Sakarya Continent in the north and the Menderes Massif in the south. Internal succession of these two massifs have been described as metamorphic complexes consisting of various kinds of micaschists, quartz mica schist, gneisses, amphibolites and

B. Erdogan; E. Akay; A. Hasözbek; M. Satir; W. Siebel

2009-01-01

11

The Lassell Massif - a Silicic Lunar Volcano  

NASA Astrophysics Data System (ADS)

Lunar volcanic processes were dominated by mare-producing basaltic extrusions. However, limited occurrences of non-mare, geochemically evolved (Si-enriched) volcanic deposits have long been suspected on the basis of spectral anomalies (red spots), landform morphologies, and the occurrence of minor granitic components in Apollo sample suites [e.g., 1-5]. The LRO Diviner Lunar Radiometer Experiment (Diviner) measured thermal emission signatures considered diagnostic of highly silicic rocks in several red spot areas [6,7], within the Marius domes [8], and from the Compton-Belkovich feature on the lunar farside [9]. The present study focuses on the Lassell massif red spot (14.73°S, 350.97°E) located in northeastern Mare Nubium near the center of Alphonsus A crater. Here we use Diviner coverage co-projected with Lunar Reconnaissance Orbiter Camera (LROC) images [10] and digital elevation models to characterize the Lassell massif geomorphology and composition. Localized Diviner signatures indicating relatively high silica contents correlate with spatially distinct morphologic features across the Lassell massif. These features include sub-kilometer scale deposits with clear superposing relationships between units of different silica concentrations. The zone with the strongest signal corresponds to the southern half of the massif and the Lassell G and K depressions (formerly thought to be impact craters [11]). These steep-walled pits lack any obvious raised rims or ejecta blankets that would identify them as impact craters; they are likely explosive volcanic vents or collapse calderas. This silica-rich area is contained within the historic red spot area [4], but does not appear to fully overlap with it, implying compositionally distinct deposits originating from the same source region. Low-reflectance deposits, exposed by impact craters and mass wasting across the massif, suggest either basaltic pyroclastics or minor late-stage extrusion of basaltic lavas through vents within the structure. The Lassell massif is thus a volcanic construct with a range of silica concentrations. Based on landform morphology, some deposits appear enriched enough in silica to affect magma viscosity, the character of extrusion, and edifice construction. Stratigraphic relationships between the massif and surrounding deposits suggest that at least some volcanic activities associated with the massif occurred after mare emplacement. Together with volcanic features in the surrounding region, a compositionally and temporally complex volcanic history is supported for this portion of Mare Nubium. Magma production, extrusion, and timing of emplacement models would benefit from petrologic studies of new samples returned from this region. References: [1] Hagerty J. J. et al., (2006) JGR 111 (E06002). [2] Wagner R. et al., (2010) JGR 115 (E06015). [3] Wood C. A. and Head III J. W. (1975) Conf. on Origins of Mare Basalts, Lunar Sci. Inst., Houston, TX. [4] Whitaker E. A. (1972) Apollo 16 Prelim. Sci. Rpt. NASA SP-315, pp. 29-104 to 29-105. [5] Jolliff B. L. et al., (1991) Lunar Planet. Sci. Conf. XXI, 101-118. [6] Glotch T. D. et al., (2010) Science 329, 1510-1513. [7] Greenhagen B. T. et al., (2010) Science 329, 1507-1509. [8] Glotch T. D. et al., (2011) GRL, 38(L21204). [9] Jolliff B. L. et al., (2011) Nat Geosci. 4. [10] Robinson M. S. et al., (2010) Space Sci. Rev. 150(1-4), 81-124. [11] Wilhelms D. E. (1972) USGS Map I-722.

Ashley, J.; Robinson, M. S.; Stopar, J. D.; Glotch, T. D.; Hawke, B. R.; Lawrence, S. J.; Jolliff, B. L.; Greenhagen, B. T.; Paige, D. A.

2013-12-01

12

Apatite fission-track dating and low-temperature history of the Bavarian Forest (southern Bohemian Massif)  

NASA Astrophysics Data System (ADS)

Apatite fission-track (AFT) dating applied to uplifted Variscan basement blocks of the Bavarian Forest is employed to unravel the low-temperature history of this segment of the Bohemian Massif. Twenty samples were dated and confined track lengths of four samples were measured. Most samples define Cretaceous APT ages between 110 and 82 Ma (Albian to Campanian) and three samples give older ~148-140 Ma (Jurassic-Cretaceous boundary) ages. No discernible regional age variations exist between the areas north-east and south-west of the Pfahl shear zone, but >500 m post-Jurassic and post-Cretaceous vertical offsets along this and other faults can be inferred from elevation profile analyses. The AFT ages clearly postdate the Variscan exhumation history of the Bavarian Forest. Thermal modeling reveals that the ages are best explained by a slight reheating of the basement rocks to temperatures within the apatite partial annealing zone during the middle and late Jurassic and/or by late Cretaceous marine transgression causing burial heating, which affected marginal low-lying areas of the Bohemian Massif and the Bavarian Forest. Late Jurassic period was followed by enhanced cooling through the 120-60 °C temperature interval during the subsequent exhumation phase for which denudation rates of ~100 m myr-1 were calculated. On a regional scale, Jurassic-Cretaceous AFT ages are ubiquitous in marginal structural blocks of the Bohemian Massif and seem to reflect the exhumation of these zones more distinctly compared to central parts.

Vamvaka, A.; Siebel, W.; Chen, F.; Rohrmüller, J.

2014-01-01

13

Detachment Shear Zone of the Atlantis Massif Oceanic Core Complex  

Microsoft Academic Search

Near-bottom investigations of the cross section of the Atlantis Massif exposed in a major tectonic escarpment along the Atlantis Transform Fault provide an unprecedented view of the internal structure of the footwall domain of an oceanic core complex. Integrated direct observations, photogeology, and imaging define a mylonitic, low-angle detachment shear zone (DSZ) along the crest of the massif. The shear

J. Karson; G. Fruh-Green; D. Kelley; D. Yoerger; M. Jakuba

2005-01-01

14

Evolution of the Bohemian Massif: Insights from numerical modeling  

E-print Network

Evolution of the Bohemian Massif: Insights from numerical modeling Petra Maierová Supervisor: Doc of Geophysics Faculty of Mathematics and Physics Charles University in Prague #12;February 4, 2013Evolution Conclusions Outline #12;February 4, 2013Evolution of the Bohemian Massif: Insights from numerical modeling 3

Cerveny, Vlastislav

15

The western limits of the Seattle and Tacoma faults and their interaction with faults of the Olympic Massif, Washington (Invited)  

NASA Astrophysics Data System (ADS)

Recently acquired high-resolution seismic-reflection and magnetic data show that the Seattle fault of Washington State extends 24-km west of its previously mapped extent and thus comprises a >100-km-long active fault zone. These same data reveal largely concealed faults and folds that kinematically link the Seattle fault with active faults in the Olympic Massif. Linkage between the Seattle fault and the north-northeast-striking Saddle Mountain fault in the Olympic Massif may explain the synchroneity of M7 earthquakes occurring on both these faults approximately 1,100 years ago. The western limits of the 20-km-long east-striking Tacoma fault, a backthrust in the hanging wall of the Seattle fault zone, forms the southern margin of the Seattle uplift in contact with the Tacoma basin to the south. A ~20-km-long potential-field lineament extends from the western limits of the Tacoma fault northward to the Seattle fault and may reflect a structure linking these active faults. A geologic model based on magnetic, gravity, and seismic data shows that this potential-field lineament is likely caused by a low-angle, west-verging thrust fault, that we refer to as the Dewatto fault. We suggest that the Dewatto fault was initiated during exhumation of the Olympic Massif but, because of changes in principal strain direction, today largely accommodates north-directed, strike-slip motion along the west margin of the Seattle uplift. Thus, the Dewatto and Saddle Mountain faults and the western parts of the Seattle and Tacoma faults kinematically interact to accommodate north-directed horizontal displacement of the Seattle uplift relative to the Olympic Massif.

Lamb, A.; Blakely, R. J.; Liberty, L. M.; Pratt, T. L.; Sherrod, B. L.

2013-12-01

16

Kinematics of Post-Collisional Extensional Tectonics and Exhumation of the Menderes Massif in the Western Anatolia Extended Terrane, Turkey  

NASA Astrophysics Data System (ADS)

The Western Anatolia Extended Terrane in Turkey is one of the best-developed examples of post-collisional extended terranes and contains one of the largest metamorphic core complexes in the world, the Menderes massif. It has experienced a series of continental collisions from the Late Cretaceous to the Eocene as the Neotethys Ocean closed and the Izmir-Ankara-Erzincan suture zone was formed. Based our field work and monazite ages, we suggest that the north-directed postcollisional Cenozoic extension in the region is the product of three consecutive, uninterrupted stages, triggered by three different mechanisms. The first stage was initiated about 30 Ma ago, in the Oligocene by the Orogenic Collapse the thermally weakened continental crust along the north-dipping Southwest Anatolian shear zone. The shear zone was formed as an extensional simple-shear zone with listric geometry at depth and exhibits predominantly normal- slip along its southwestern end. But, it becomes a high-angle oblique-slip shear zone along its northeastern termination. Evidence for the presence of the shear zone includes (1) the dominant top to the north-northeast shear sense indicators throughout the Menderes massif, such as stretching lineations trending N10E to N30E; and (2) a series of Oligocene extensional basins located adjacent to the shear zone that contain only carbonate and ophiolitic rock fragments, but no high grade metamorphic rock fragments. During this stage, erosion and extensional unroofing brought high-grade metamorphic rocks of the central Menderes massif to the surface by the early Miocene. The second stage of the extension was triggered by subduction roll-back and associated back-arc extension in the early Miocene and produced the north-dipping Alasehir and the south-dipping Buyuk Menderes detachments of the central Menderes massif and the north-dipping Simav detachment of the northern Menderes massif. The detachments control the Miocene sedimentation in the Alasehir, Buyuk Menderes, and Simav grabens, containing high-grade metamorphic rock fragments. The third stage of the extension was triggered by the lateral extrusion (tectonic escape) of the Anatolian plate when the North Anatolian fault was initiated at about 5 Ma. This extensional phase produced the high- angle faults in the Alasehir, Buyuk Menderes and Simav grabens and the high-angle faults controlling the Kucuk Menderes graben.

Cemen, I.; Catlos, E. J.; Diniz, E.; Gogus, O.; Ozerdem, C.; Baker, C.; Kohn, M. J.; Goncuoglu, C.; Hancer, M.

2006-12-01

17

5. INTERIOR OF NORTHEAST ROOM AND MEZZANINE, NORTHEAST VIEW OF ...  

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

5. INTERIOR OF NORTHEAST ROOM AND MEZZANINE, NORTHEAST VIEW OF (HOISTS IN CENTER). - Vanadium Corporation of America (VCA) Naturita Mill, Sampling Building & Ore Receiving Platform, 3 miles Northwest of Naturita, between Highway 141 & San Miguel River, Naturita, Montrose County, CO

18

VIEW OF NORTHEAST TOWARD MAINTENANCE SHED AT NORTHEAST CORNER OF ...  

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

VIEW OF NORTHEAST TOWARD MAINTENANCE SHED AT NORTHEAST CORNER OF PARK - Candler Park Historic District, Roughly bounded by Moreland, Dekalb, McLendon & Harold Avenues, Matthews Street & Clifton Terrace, Atlanta, Fulton County, GA

19

Northeast Regional Climate Center  

NSDL National Science Digital Library

NOAA's Northeast Regional Climate Center (NRCC): Climate Data and Products Web site is part of the nationwide network that provides "convenient and timely access to accurate and reliable climate information." The Web sites are described as being "available to assist in interpreting present conditions, quantifying climate variability, and assessing the likelihood of extreme weather events that often produce major social, economic and environmental impacts in a region." Following this charge, this site provides Comparative Climatic Data for the US; Current Weather Conditions Around the Northeast (from Unisys); specific data about Ithaca, NY's Climate; and NRCC Research Reports. If you happen to be looking for various types of climatic information or data for the Northeast, this is a great place to start.

20

Re-Os geochemistry and geochronology of the Ransko gabbro-peridotite massif, Bohemian Massif  

NASA Astrophysics Data System (ADS)

The Ransko gabbro-peridotite massif in Eastern Bohemia is a strongly differentiated intrusive complex, which hosts low-grade Ni-Cu ores mainly developed close to the contact of olivine-rich rocks with gabbros, in troctolites, and to a much lesser extent in both pyroxene and olivine gabbros and plagioclase-rich peridotites. Gabbro, troctolite, peridotite and Ni-Cu ores from the Jezírka Ni-Cu (PGE) deposit, considered to be a typical example of the liquid segregation style of mineralization, were analyzed for Re-Os concentrations and isotopic ratios. Seven barren and mineralized samples from the Jezírka deposit yielded a Re-Os regression of 341.5 ± 7.9 Ma (MSWD = 69). Strongly mineralized peridotite with mantle-like initial 187Os/188Os ratio of 0.125 suggests that Os as well as other PGE present in the Ni-Cu mineralization are predominantly of mantle origin. On the other hand, barren and low-mineralized samples have radiogenic initial 187Os/188Os ratios of 0.14-0.16 suggesting some import of Re and/or radiogenic 187Os most likely through contamination by continental crust during magma emplacement. The Re-Os age of the Ransko Massif is significantly younger than the previously suggested Lower Cambrian age, but it is similar to and/or younger than the age of metamorphism of the adjacent Kutná Hora crystalline complex and the Moldanubian unit. Therefore, it is likely that the emplacement of the Ransko massif and its Ni-Cu mineralization was closely connected with the late-stage evolution of the Kutná Hora crystalline complex.

Ackerman, Lukáš; Pašava, Jan; Erban, Vojt?ch

2013-10-01

21

Geological and geochemical reconnaissance in the central Santander Massif, Departments of Santander and Norte de Santander, Colombia  

USGS Publications Warehouse

The central Santander Massif is composed of Precambrian Bucaramanga Gneiss and pre-Devonian Silgara Formation intruded by Mesozoic quartz diorite, quartz monzonite, and alaskite and Cretaceous or younger porphyry. Triassic (Bocas Formation), Jurassic (Jordan and Giron Formations).and Cretaceous (Tambor, Rosa Blanca, Paja, Tablazo, Simiti, La Luna, and Umir Formations) sedimentary rocks overlie the metamorphic rocks and are younger than most of the intrusions. A geological and geochemical reconnaissance of part of the central Santander Massif included the Vetas and California gold districts. At Vetas the gold is generally in brecciated aphanitic quartz and phyllonite. Dark-gray material in the ore may be graphite. The ore veins follow steep west-northwest- and north-northeast-striking fracture zones. No new gold deposits were found. Additional geochemical studies should concentrate on western Loma Pozo del Rey and on improvement of the gold extraction process. At California the gold is in pyritiferous quartz veins and quartz breccia. Ore containing black sooty material (graphite?) is highly radioactive. Some of the mineralization is post-Lower Cretaceous. Soil samples indicate that gold deposits lie under the thick blanket of soil on the ridges above the zone of mining. Three principal gold targets are outlined by gold and associated minerals in pan concentrates. The close relation of gold and copper anomalies suggests that copper may be useful as a pathfinder for gold elsewhere in the region. Based on occurrences of gold or high concentrations of pyrite or chalcopyrite in pan concentrates and on analytical data, eight potential gold targets are outlined in the central massif. Reconnaissance of the surrounding region is warranted.

Evans, James George

1976-01-01

22

Northeast Regional Biomass Program  

SciTech Connect

The management structure and program objectives for the Northeast Regional Biomass Program (NRBP) remain unchanged from previous years. Additional funding was provided by the Bonneville Power Administration Regional Biomass Program to continue the publication of articles in the Biologue. The Western Area Power Administration and the Council of Great Lakes Governors funded the project Characterization of Emissions from Burning Woodwaste''. A grant for the ninth year was received from DOE. The Northeast Regional Biomass Steering Committee selected the following four projects for funding for the next fiscal year. (1) Wood Waste Utilization Conference, (2) Performance Evaluation of Wood Systems in Commercial Facilities, (3) Wood Energy Market Utilization Training, (4) Update of the Facility Directory.

O'Connell, R.A.

1991-11-01

23

(222)Rn activity concentration differences in groundwaters of three Variscan granitoid massifs in the Sudetes (NE Bohemian Massif, SW Poland).  

PubMed

Based on research conducted in three Variscan granitoid massifs located within the crystalline Bohemian Massif, the authors confirmed that the higher the degree of their erosional dissection, the smaller the concentration of (222)Rn in groundwaters circulating in these massifs. This notion implies that radon waters and high-radon waters, from which at least some of the dissolved radon should be removed before feeding them as drinking water to the water-supply system, could be expected in granitoid massifs which have been poorly exposed by erosion. At the same time, such massifs must be taken into account as the areas of possible occurrence of radon medicinal waters, which in some countries can be used for balneotherapy in health resorts. Slightly eroded granitoid massifs should be also regarded as very probable radon prone areas or areas of high radon potential. PMID:24657989

Przylibski, Tadeusz A; Gorecka, Joanna

2014-08-01

24

Northeast Regional Biomass Program  

SciTech Connect

The Northeast Regional Biomass Program has been in operation for a period of nine years. During this time, state managed programs and technical programs have been conducted covering a wide range of activities primarily aim at the use and applications of wood as a fuel. These activities include: assessments of available biomass resources; surveys to determine what industries, businesses, institutions, and utility companies use wood and wood waste for fuel; and workshops, seminars, and demonstrations to provide technical assistance. In the Northeast, an estimated 6.2 million tons of wood are used in the commercial and industrial sector, where 12.5 million cords are used for residential heating annually. Of this useage, 1504.7 mw of power has been generated from biomass. The use of wood energy products has had substantial employment and income benefits in the region. Although wood and woodwaste have received primary emphasis in the regional program, the use of municipal solid waste has received increased emphasis as an energy source. The energy contribution of biomass will increase as potentia users become more familiar with existing feedstocks, technologies, and applications. The Northeast Regional Biomass Program is designed to support region-specific to overcome near-term barriers to biomass energy use.

Lusk, P.D.

1992-12-01

25

Massification in Higher Education: Large Classes and Student Learning  

ERIC Educational Resources Information Center

In introducing the special issue on "Large Class Pedagogy: Opportunities and Challenges of Massification" the present editorial takes stock of the emerging literature on this subject. We seek to contribute to the massificaiton debate by considering one result of it: large class teaching in higher education. Here we look to large classes…

Hornsby, David J.; Osman, Ruksana

2014-01-01

26

Massification and the Large Lecture Theatre: From Panic to Excitement  

ERIC Educational Resources Information Center

In this article I examine the role of the contemporary university in light of the mass increase in class sizes that has occurred on an international scale. While we may look nostalgically back to a time when lectures numbered a few hundred students and tutorials had as few as ten, massification at undergraduate level is an inescapable fact of…

Arvanitakis, James

2014-01-01

27

Histoire gologique du Massif armoricain : actualit de la recherche  

E-print Network

-Ferrand, 5 rue Kessler, 63000 Clermont-Ferrand, France 3 Applied Geosciences, German University of Technology armoricain, de sorte que la morphologie actuelle de ce « massif » ne doit plus rien à l'oro- genèse varisque

Boyer, Edmond

28

Paleomagnetism of the Late Ordovician Thouars Massif, Vendee Province, France  

NASA Astrophysics Data System (ADS)

A paleomagnetic study of the Late Ordovician Thouars Massif reveals very steep components of magnetization, directed upward and downward, and with thermally discrete blocking temperatures of 550° to 580°C. This characteristic magnetization yields a mean direction with declination/inclination = 340°/-83°, with k = 27 and ?95 = 7°, based on 15 sites. The south paleopole is located at 34°N, 5°E. A partial magnetic overprint of Hercynian age is observed in sites close to the South Armorican Shear Zone. The 15 sites are spread over some 20 by 30 km, and the internal consistency of the site-mean directions indicates that differential tilting of parts of the massif has not occurred. Since it appears to be unlikely that the entire massif was tilted, we infer that the characteristic direction is primary and that the paleopole adequately represents the local magnetic field in the Late Ordovician. The paleopole for the Thouars Massif supports previously obtained results from other Ordovician rocks in Hercynian Europe, but it is the first result to pass modern reliability criteria. The high Ordovician paleolatitudes of the Armorican Massif, other areas in Hercynian Europe, and north-western Africa, indicate that Gondwana and Armorica were adjacent until Late Ordovician time. Low paleolatitudes for Late Devonian time suggest that Armorica underwent rapid northward motion, at a rate of about 10 cm/yr, during the Silurian and earliest Devonian. Armorica is thought to have collided with North America and the Baltic shield/Russian Platform before or during the Early Devonian, forming the Old Red Continent. The collisions produced the Caledonian and Acadian orogenic belts.

Perroud, Hervé; van der Voo, Rob

1985-05-01

29

2. SOUTHWEST VIEW OF NORTH SIDE (NORTHEAST CORNER).. THE NORTHEAST ...  

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

2. SOUTHWEST VIEW OF NORTH SIDE (NORTHEAST CORNER).. THE NORTHEAST SIDE OF THE MINE OFFICE IS IN THE BACKGROUND. - Juniata Mill Complex, Mill Camp Shed, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

30

New thermochronological constraints for the exhumation of the Aiguilles Rouges massif, Western Alps  

NASA Astrophysics Data System (ADS)

During Oligo-Miocene times, the proximal part of the European passive margin underwent collisional shortening. In the outermost part of the Alpine arc, this shortening occurred in the fold-and-thrust belts (Bornes, Bauges, Chartreuse and Vercors massifs) with no significant tectonic burial. In the External Crystalline Massifs (ECM: Mont Blanc, Aiguilles Rouges, Belledonne, Oisans massifs) the crust was buried at mid-crustal depths below the internal units at 35 to 30 Ma. Along the ECORS profile, the timing of the Mont Blanc massif deformation and exhumation is now well constrained. However, the exhumation of the Aiguilles Rouges massif is much less constrained and this led to various and contrasting interpretations in terms of structural style and sequence of shortening. In this contribution, we present a new thermochronological dataset of the southern part of the Aiguilles Rouges massif. (U-Th-Sm)/He ages on zircons were obtained on three different elevation profiles. Preliminary results indicate ages around 7-8 Ma, which are consistent with Apatite Fission Track data. Those results will allow us to better constrain the timing of the Aiguilles Rouges massifs exhumation relative to the Mont Blanc massif and decipher whether these massifs are deformed in the forward sequence or not, if there were some out-of-sequence major shear zones/thrusts, or if these massifs were deformed sub-coevally. This has major implications in terms of both Alpine collisional wedge kinematics and crustal rheology of the European margin during the Tertiary collision.

Boutoux, Alexandre; Bellahsen, Nicolas; Pik, Raphael; Rolland, Yann; Verlaguet, Anne; Lacombe, Olivier

2014-05-01

31

Northeast Document Conservation Center  

NSDL National Science Digital Library

Founded in 1973, the Northeast Document Conservation Center (NDCC) was created to address the rapid deterioration of older paper-based documents in a number of institutions across New England. On their website, visitors can learn about their conservation and imaging services, and also examine some of their fine resources intended for members of the preservation community. The "Resources" area is a good place to start, as it contains a number of suggestions for preserving private and family collections and also contains a set of additional web-based resources and links. Beyond those materials, there are a number of digitized leaflets here, such as "Assessing Preservation Needs: A Self-Survey Guide" and "Preservation of Library and Archival Materials". The site is rounded out by an excellent disaster assistance section that includes an online disaster planning tool called "dPlan" and a set of general guidelines for archival institutions that may be coping with such situations.

32

Detachment Shear Zone of the Atlantis Massif Oceanic Core Complex  

NASA Astrophysics Data System (ADS)

Near-bottom investigations of the cross section of the Atlantis Massif exposed in a major tectonic escarpment along the Atlantis Transform Fault provide an unprecedented view of the internal structure of the footwall domain of an oceanic core complex. Integrated direct observations, photogeology, and imaging define a mylonitic, low-angle detachment shear zone (DSZ) along the crest of the massif. The shear zone may project beneath the nearby, corrugated upper surface of the massif. The DSZ and related structures are inferred to be responsible for the unroofing of lower crustal gabbros and upper mantle peridotites by extreme, localized tectonic extension during seafloor spreading over the past 2 m.y. Strongly foliated serpentinites and talc-amphibole schists of the DSZ are about 100 m thick and can be traced continuously for at least 3 km in the spreading direction. Foliated DSZ rocks grade structurally downward into more massive basement rocks that lack a pervasive low-temperature deformation fabric. The main DSZ and underlying basement rocks are cut by discrete, anastomosing normal-slip, shear zones. Widely spaced, steeply dipping, normal faults cut all the older structures and localize serpentinization-driven hydrothermal outflow at the Lost City Hydrothermal Field. A thin (few meters) sequence of sedimentary breccias grading upward into pelagic limestones directly overlies the DSZ and may record a history of progressive rotation of the shear zone from an earlier moderately dipping attitude into its present, gently dipping orientation during lateral spreading and uplift.

Karson, J.; Fruh-Green, G.; Kelley, D.; Yoerger, D.; Jakuba, M.

2005-12-01

33

National Marine Fisheries Service, Northeast Fisheries Science Center Northeast Fisheries Observer Program  

E-print Network

National Marine Fisheries Service, Northeast Fisheries Science Center Northeast Fisheries Observer required to work as a Northeast Fisheries Observer Program (NEFOP) observer. Education and Experience or technical courses such as biology, chemistry, statistics entomology, animal husbandry, physics

34

Social Class Barriers of the Massification of Higher Education in Taiwan  

ERIC Educational Resources Information Center

In recent years, the rapid growth of higher education in Taiwan has led to an essential shift from education for the elite to the massification of higher education. Although this massification is making higher education more accessible, one of the main concerns is whether opportunities for higher education are the same among all social classes in…

Ru-Jer, Wang

2012-01-01

35

Detachment shear zone of the Atlantis Massif core complex, Mid-Atlantic Ridge, 30°N  

Microsoft Academic Search

Near-bottom investigations of the cross section of the Atlantis Massif exposed in a major tectonic escarpment provide an unprecedented view of the internal structure of the footwall domain of this oceanic core complex. Integrated direct observations, sampling, photogeology, and imaging define a mylonitic, low-angle detachment shear zone (DSZ) along the crest of the massif. The shear zone may project beneath

J. A. Karson; G. L. Früh-Green; D. S. Kelley; E. A. Williams; D. R. Yoerger; M. Jakuba

2006-01-01

36

Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, MidAtlantic Ridge 30N  

E-print Network

Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, MidAtlantic Ridge of the Integrated Ocean Drilling Program cored and logged a 1.4 km section of the domal core of Atlantis Massif. 8 Philex Mining Corporation, Pasig City, Philippines. 9 Laboratoire de Géologie, Université Claude

Paris-Sud XI, Université de

37

A key extensional metamorphic complex reviewed and restored: The Menderes Massif of western Turkey  

E-print Network

Massif, and the Southern Menderes Massif and overlying HP nappes, Lycian Nappes and Bey Dalari about with an offset of 150 km, cutting through the Lycian Nappes. For this, there is no evidence. The Lycian Nappes-wards displacement of the Lycian Nappes was twice the minimum amount of 75 km, which would restore them back on top

Utrecht, Universiteit

38

The Logar ultrabasite massif and its reflection in the magnetic field (East Afghanistan)  

NASA Astrophysics Data System (ADS)

The paper deals with the structural position of the Logar ultrabasite massif with respect to the folded Kabul block. The ultrabasite is composed of a thick tectonic mantle in the ophiolite belt in the northern portion of south eastern Afghanistan. Magnetometric data together with geological investigations make it possible to understand the tectonic nature of the massif contacts.

Shareq, Abdullah; Voinov, V. N.; Nevretdinov, E. B.; Kubatkin, L. V.; Gusav, I. A.

1980-02-01

39

Contamination of the Marcy Anorthosite Massif, Adirondack Mountains, NY: petrologic and isotopic evidence  

Microsoft Academic Search

Oxygen isotope analyses of 101 samples from the Marcy Anorthosite Massif (61 from this study, 40 from Taylor 1969), indicate that two major and distinct processes of crustal contamination have affected the massif. Ninety percent of the 93 samples with over 65% plagioclase are enriched in 18O by ~ 2.6 ‰ relative to “normal” anorthosites or gabbros: the average d18O

Jean Morrison; John W. Valley

1988-01-01

40

Mohorovicic discontinuity depth analysis beneath North Patagonian Massif  

NASA Astrophysics Data System (ADS)

The North Patagonian Massif is a 100000 km2, sub-rectangular plateau that stands out 500 to 700 m higher in altitude than the surrounding topography. The creation of this plateau took place during the Oligocene through a sudden uplift without noticeable internal deformation. This quite different mechanical response between the massif and the surrounding back arc, the short time in which this process took place and a regional negative Bouguer anomaly in the massif area, raise the question about the isostatic compensation state of the previously mentioned massif. In the present work, a comparison between different results about the depth of the Mohorovicic discontinuity beneath the North Patagonian Massif and a later analysis is made. It has the objective to analyze the crustal thickness in the area to contribute in the determination of the isostatic balance and the better understanding of the Cenozoic evolution of the mentioned area. The comparison is made between four models; two of these were created with seismic information (Feng et al., 2006 and Bassin et al., 2000), another model with gravity information (Barzaghi et al., 2011) and the last one with a combination of both techniques (Tassara y Etchaurren, 2011). The latter was the result of the adaptation to the work area of a three-dimensional density model made with some additional information, mainly seismic, that constrain the surfaces. The work of restriction and adaptation of this model, the later analysis and comparison with the other three models and the combination of both seismic models to cover the lack of resolution in some areas, is presented here. According the different models, the crustal thickness of the study zone would be between 36 and 45 Km. and thicker than the surrounding areas. These results talk us about a crust thicker than normal and that could behave as a rigid and independent block. Moreover, it can be observed that there are noticeable differences between gravimetric and seismic models in the North Patagonian Massif area and in its West boundary but almost any difference in the other geographical limits. It is an interesting result and could be related with the isostatic compensation state of the area. References: Barzaghi R., Borghi A., Reguzzoni M., Sampietro D. Global Moho Estimate from GOCE Space-Wise Solution and a Local Application in the Mediterranean Area Bassin, C., Laske, G. and Masters, G., The Current Limits of Resolution for Surface Wave Tomography in North America, EOS Trans AGU, 81, F897, 2000. Feng M., Van der Lee S., Assumpçao M.. Upper mantle structure of South America from joint inersion of waveforms and fundamental mode group velocities of Rayleigh waves. Journal of Goephysical Research, vol. 112, B04312, doi:10.1029/2006JB004449,2007 Tassara A., A. Echaurren, 2011. Anatomy of the Chilean Subduction Zone: Three-dimensional density model upgraded and compared against global-scale models. Geophysical journal international, doi: 10.1111/j.1365-246X.2012.05397.x

Gómez Dacal, M. L.; Tocho, C.; Aragón, E.

2013-05-01

41

Velocity structure of uppermost mantle from Pn tomography in Northeast China  

NASA Astrophysics Data System (ADS)

The Northeast China is an important region of the occurrence of deep earthquakes. It also is the best place where we study the subduction and volcanic activity of the western Pacific plate. In our work we have selected 30648 travel times of Pn arrivals as reported in the Annual Bulletin of Chinese Earthquakes(ABCE) and regional seismic network of Jilin province and Liaoning province. A two-dimensional tomography method is employed to find regional variation of Pn velocity and anisotropy in the uppermost mantle in Northeast China and its adjacent regions. In the most study area 2 degrees are well resolved. The main results show the relations of Pn velocity variation to regional tectonic structure, Moho depth, earth's heatflow and Cenozonic volcanism zones: Pn velocity structure is close to the regional tectonic structure and shows distribution of alternating high and low Pn velocity in the direction of NE~NNE. Low Pn velocities are found beneath Songliao Plain, XiaLiaohe Plain, Hailaer Basin and Bohai Basin. High Pn velocities are beneath Greater Khingan Mountains, Xiao Xingan Mountains and Changbai Mountains. Quantitative analysis result indicates that Pn velocity is positively correlated with crust thickness and negatively correlated with Earth's heatflow. The Pn velocities in the Changbai volcano and Jingpohu volcano activities are obviously low. In addition, the overall performance of Pn anisotropy is weak. Only in Jiamusi massif, Bohai Sea, Changbai volcano and Datong volcano we observe significant anisotropy. In Bohai Basin, the direction of fast Pn velocity is consistent with the direction of present-day crust movement. But not beneath Jiamusi massif, it may be due to the mantle flow caused by the subduction of the Pacific plate. This study was supported by the international cooperation project of the Ministry of Science and Technology of China(NO.2011DFB20120) and NSFC(Grant No.41004034).

Sun, L.; Wu, Q.

2013-12-01

42

NORTHEAST FLORIDA BEEF & FORAGE GROUP  

E-print Network

Page | 1 2008 NORTHEAST FLORIDA BEEF & FORAGE GROUP FARM & FORAGE RESOURCE GUIDE #12 Beef & Forage Group, Alachua County Extension, Baker County Extension, Bradford County Extension, Clay Beef and Forage Group We are a group of Extension Agents providing regional programming for livestock

Watson, Craig A.

43

Structural geology investigation on Massif Central and Parisian Basin (France)  

NASA Technical Reports Server (NTRS)

The author has identified the following significant results. Band 5 gives the most information concerning the fracturing in the Massif Central and Parisian Basins. Band 6 and 7 show the fractures emphasized by forest boundaries and by the linear trace of water courses. The most remarkable information drawn from the preliminary investigation of two ERTS-1 images covering two different landscapes, a regular relief of shelving plateau bounded by cuestas having a sedimentary origin and a mountainous region built in crystalline and volcanic rocks, is that the deep structural elements under a thick sedimentary cover can be translated on the surface by indirect criteria. MSS imagery has permitted the Metz fault to be extended towards the west and shows clearly, through land use on the Rhone Valley fluvial deposit, the continuation towards the east of the carboniferous basin of St. Etienne.

Weecksteen, G. (principal investigator)

1973-01-01

44

Types Of The Focal Mechanisms Of Seismic Events In The Khibiny Massif  

Microsoft Academic Search

The stress-strain state of Khibiny massif and the focal mechanisms of microseismic events (magnitudes as many M=1) were investigated. This analysis was based on seis- mical data registered by automized monitoring system of in the ore mines \\

I. V. Fedotova; S. L. Yunga

2002-01-01

45

Les granites du Massif Central Français: étude comparée des leucogranites et granodiorites  

Microsoft Academic Search

Chemical and mineralogical compositions of granitic rocks of the French Massif Central enable us to classify them into two distinct groups: (i) leucogranites, (ii) granodiorites or quartz-monzonites, separated by a natural gap.

J. Didier; J. Lameyre

1969-01-01

46

The lattice preferred orientation of olivine in Beni Bousera Ultramafic Massif, Morocco  

E-print Network

The roll of melt in deformation of the mantle is important for understanding mantle processes and evolution. The Beni Bousera Ultramafic Massif, northern Morocco, shows petrologic evidence that melt was an important part ...

Stanley, Jessica R

2009-01-01

47

Petrology and geochemistry of pyroxenites in the Lanzo ultramafic massif, Northwestern Italy  

E-print Network

Combined field, microtextural, and geochemical observations are presented for pyroxenites in the Lanzo ultramafic massif in order to place chemical and petrological constraints both locally on the geologic history of the ...

Pesce, Kathryn A

2012-01-01

48

Homogeneous ¹⁸O enrichment of the Marcy Anorthosite Massif, Adirondack Mountains, New York  

Microsoft Academic Search

The Marcy Anorthosite Massif in the Adirondack Mountains, New York, is a composite intrusion that was metamorphosed to granulite facies at approx. 1.1 Ga. The massif is dominantly anorthosite but ranges from anorthosite (1-10% mafics) to oxide-rich pyroxenite layers (up to 98% mafics). In the St Regis Quad (SRQ) systematic variations in the percentage of mafics (POM) roughly parallel the

J. Morrison; J. W. Valley

1985-01-01

49

Cross-Section of the Atlantis Massif --- Geologic Framework for the Lost City Hydrothermal Vent Field  

Microsoft Academic Search

The Atlantis Massif is an oceanic core complex situated on 1.5-Ma-old crust at 30° N on the Mid-Atlantic Ridge. Its domed, corrugated upper surface is interpreted as a major detachment fault. The steep, mass-wasted south wall of the massif provides a window into the architecture of the footwall of this detachment fault and underlying rocks. Alvin and Argo II were

E. A. Williams; J. A. Karson; D. S. Kelley; G. L. Früh-Green

2003-01-01

50

Geophysical Constraints on the Nature of Atlantis Massif, 30°N MAR  

Microsoft Academic Search

Recent drilling at Atlantis Massif, Mid-Atlantic Ridge 30°N, provides new insights into oceanic core complex (OCC) development. IODP Expeditions 304\\/305 had high recovery in the footwall of the detachment capping the central dome of the massif: Hole U1309B, 100 m deep; Hole U1309D, 1415 m. Recovery of a dominantly gabbroic sequence challenges prior interpretations that this OCC was mainly ultramafic,

D. Blackman

2005-01-01

51

Historical Floods in the Northeast  

NSDL National Science Digital Library

This site reviews major flooding in the Northeastern United States, as reported by the Northeast River Forecast Center (NERFC), a division of the National Weather Service. It includes photos, rainfall maps, and descriptions of record-breaking floods that occured between the years 1927 and 1996. Descriptions include specific causes of flooding, weather patterns leading up to flooding, as well as results and actions taken due to flooding in the regions discussed.

52

The Northeast Climate Science Center  

NASA Astrophysics Data System (ADS)

The Department of Interior Northeast Climate Science Center (NE CSC) is part of a federal network of eight Climate Science Centers created to provide scientific information, tools, and techniques that managers and other parties interested in land, water, wildlife and cultural resources can use to anticipate, monitor, and adapt to climate change. Recognizing the critical threats, unique climate challenges, and expansive and diverse nature of the northeast region, the University of Massachusetts Amherst, College of Menominee Nation, Columbia University, Marine Biological Laboratory, University of Minnesota, University of Missouri Columbia, and University of Wisconsin-Madison have formed a consortium to host the NE CSC. This partnership with the U.S. Geological Survey climate science center network provides wide-reaching expertise, resources, and established professional collaborations in both climate science and natural and cultural resources management. This interdisciplinary approach is needed for successfully meeting the regional needs for climate impact assessment, adaptive management, education, and stakeholder outreach throughout the northeast region. Thus, the NE CSC conducts research, both through its general funds and its annual competitive award process, that responds to the needs of natural resource management partners that exist, in part or whole, within the NE CSC bounds. This domain includes the North Atlantic, Upper Midwest and Great Lakes, Eastern Tallgrass and Big Rivers, and Appalachian Landscape Conservation Cooperatives (LCCs), among other management stakeholders. For example, researchers are developing techniques to monitor tree range dynamics as affected by natural disturbances which can enable adaptation of projected climate impacts; conducting a Designing Sustainable Landscapes project to assess the capability of current and potential future landscapes in the Northeast to provide integral ecosystems and suitable habitat for a suite of representative species and provide guidance for strategic habitat conservation; studying the effects of changes in the frequency and magnitude of drought and stream temperature on brook trout habitats, spatial distribution and population persistence; and conducting assessments of northeastern regional climate projections and high-resolution downscaling.

Ratnaswamy, M. J.; Palmer, R. N.; Morelli, T.; Staudinger, M.; Holland, A. R.

2013-12-01

53

FOURTEEN RUSTS FROM NORTHEAST IRAN  

Microsoft Academic Search

SUMMARY Surveys of fields, parks, and forests in the Golestan province of northeast Iran resulted in the record of four- teen rust-induced diseases on weeping willow, black poplar, blackberry, rose, estragon, garlic, wild oat, barley, ryegrass, wheat, peach, plum, alfalfa, and broad bean. Causal agents were identified as Melampsora coleospori- oides, M. allii-populina, Phragmidium bulbosum, Ph. vio- laceum, Ph. rosae-pimpinellifoliae,

M. Sadravi; Y. Ono; M. Pei; K. Rahnama

2007-01-01

54

Recent geodynamic pattern of the eastern part of the Bohemian Massif  

NASA Astrophysics Data System (ADS)

The Bohemian Massif, a Precambrian cratonic terrane, had been affected by several orogeneses forming its tectonic pattern. To detect the recent geodynamic motions going on fundamental geological structures of the Massif four regional geodynamic networks were established for epoch GPS measurements and one countrywide GEONAS network for permanent GPS satellite signals monitoring. In the east part of the Bohemian Massif sinistral movements on the Sudetic NW-SE faults and as well on the NNE-SSW faults of the Moravo-Silesian tectonic system have been detected. The sinistral trends dominate on many faults situated close to the contact of the Moldanuabian and Lugian parts and the Moravo-Silesian part of the Bohemian Massif. Because of tectonic systems intersections an existence of dextral movements cannot be excluded. Additional analyses displayed that eastern part of the Massif could be under extending trends. The preliminary site velocities assessed from GPS data for the eastern part of the Bohemian Massif are discussed from a viewpoint of regional geological structure motions. The work was supported by the Grant Agency of the Academy of Sciences of the Czech Republic (Project IAA300460507), the Targeted Research Programme of the Academy of Sciences of the CR (1QS300460551) and by the Ministry of Education, Youth and Sport of the Czech Republic (Projects LC506 and 1P05ME781).

Schenk, V.; Schenková, Z.; Grácová, M.

2009-04-01

55

Low pressure granulites from the Bohemian Massif, Upper Austria  

NASA Astrophysics Data System (ADS)

Low pressure granulite facies rocks are commonly found in the Bohemian Massif in Upper Austria. They belong to the Moldanubian Unit and were metamorphosed during the last stage of the Variscan orogeny. The investigated granulites from the Donau valley (west of Linz), Lichtenberg (northwest of Linz), Sauwald (south of the river Danube) and Bad Leonfelden zone comprise mainly migmatic paragneisses. Most of these rocks underwent high degrees of melting forming meta- and diatexites (''Perlgneise)''. Al-rich metapelites with partly cm-sized garnet porphyroblasts, which are suitable for precise PT and PT-path determinations, can be found in some localities of this unit. In this study samples taken along the Danube valley between Linz and Wilhering, from Lichtenberg and from Bad Leonfelden (north of Linz) were sampled and investigated petrographically in detail. Since garnets are rare and usually consumed by cordierite, a sample with large garnets was investigated in detail. A chemical zoning profile across the c. 1cm large garnet displayed elevated Ca contents (Xgrs=0.06) in the central part which decreased discontinuously towards the rim to Xgrs=0.02. Almandine, pyrope and spessartine components do not show any pronounced zoning pattern. Most of the smaller garnet grains in other samples are also homogeneous in composition with a slight Xalm increase and Xprp decrease at the rims, typical for retrograde diffusional zoning. The cordierite-garnet-sillimanite-granulites as well as some mafic granulites were used for geothermobarometry. Metamorphic conditions of around 770°C to 850°C and 0.5-0.6 GPa could be obtained, which are similar to the values obtained by Tropper et al. (2006). P. Tropper I. Deibl F. Finger R. Kaindl (2006). P-T-t evolution of spinel-cordierite-garnet gneisses from the Sauwald Zone (Southern Bohemian Massif, Upper Austria): is there evidence for two independent late-Variscan low-P / high-T events in the Moldanubian Unit? Int J Earth Sci (Geol Rundsch) (2006) 95: 1019-1037.

Sorger, Dominik; Daghighi, Donia; Simic, Katica; Pichler, Ruth; Schwaiger, Christian; Hauzenberger, Christoph; Linner, Manfred; Iglseder, Christoph

2014-05-01

56

Tephrochronology of the Mont-Dore volcanic Massif (Massif Central, France): new 40Ar/39Ar constraints on the Late Pliocene and Early Pleistocene activity  

NASA Astrophysics Data System (ADS)

The Mont-Dore Massif (500 km2), the youngest stratovolcano of the French Massif Central, consists of two volcanic edifices: the Guéry and the Sancy. To improve our knowledge of the oldest explosive stages of the Mont-Dore Massif, we studied 40Ar/39Ar-dated (through single-grain laser and step-heating experiments) 11 pyroclastic units from the Guéry stratovolcano. We demonstrate that the explosive history of the Guéry can be divided into four cycles of explosive eruption activity between 3.09 and 1.46 Ma (G.I to G.IV). We have also ascertained that deposits associated with the 3.1-3.0-Ma rhyolitic activity, which includes the 5-km3 "Grande Nappe" ignimbrite, are not recorded in the central part of the Mont-Dore Massif. All the pyroclastites found in the left bank of the Dordogne River belong to a later explosive phase (2.86-2.58 Ma, G.II) and were channelled down into valleys or topographic lows where they are currently nested. This later activity also gave rise to most of the volcanic products in the Perrier Plateau (30 km east of the Mont-Dore Massif); three quarters of the volcano-sedimentary sequence (up to 100 m thick) was emplaced within less than 20 ky, associated with several flank collapses in the northeastern part of the Guéry. The age of the "Fournet flora" (2.69 ± 0.01 Ma) found within an ash bed belonging to G.II suggests that temperate forests already existed in the French Massif Central before the Pliocene/Pleistocene boundary. The Guéry's third explosive eruption activity cycle (G.III) lasted between 2.36 and 1.91 Ma. It encompassed the Guéry Lake and Morangie pumice and ash deposits, as well as seven other important events recorded as centimetric ash beds some 60 to 100 km southeast of the Massif in the Velay region. We propose a general tephrochronology for the Mont-Dore stratovolcano covering the last 3.1 My. This chronology is based on 44 40Ar/39Ar-dated events belonging to eight explosive eruption cycles each lasting between 100 and 200 ky. The occurrence of only one pumice deposit in the 800-ky period between 1.9 and 1.1 Ma suggests that volcanic explosive activity was strongly reduced or quiescent.

Nomade, Sébastien; Pastre, Jean-François; Nehlig, Pierre; Guillou, Hervé; Scao, Vincent; Scaillet, Stéphane

2014-03-01

57

Geochemical properties of the Beni Bousera (N. Morocco) peridotites : a field and laboratory approach to understanding melt infiltration and extraction in an orogenic peridotite massif  

E-print Network

The Beni Bousera ultramafic massif is a tectonically emplaced body of upper mantle material that is exposed over 72 km2 in the Betic-Rif-Tell orogenic belt of northern Morocco. The massif is composed primarily of spinel ...

Manthei, Christian D. (Christian David)

2012-01-01

58

Sedimentary geology as a key to understanding the tectonic evolution of the Mesozoic–Early Tertiary Paikon Massif, Vardar suture zone, N Greece  

Microsoft Academic Search

This paper demonstrates how sedimentary evidence can provide a key to elucidating the regional tectonic and palaeoceanographic significance of a complex partly metamorphic terrane, in this case the Paikon Massif. The Paikon Massif is located centrally within the Vardar–Axios zone of N Greece and is critical to the reconstruction of Neotethys in the E Mediterranean region. The massif is here

Sally A. M. Brown; Alastair H. F. Robertson

2003-01-01

59

Occurrence of springs in massifs of crystalline rocks, northern Portugal  

NASA Astrophysics Data System (ADS)

An inventory of artesian springs emerging from fractures (fracture springs) was conducted in the Pinhão River Basin and Morais Massif, northern Portugal, comprising an area of approximately 650 km2. Over 1,500 springs were identified and associated with geological domains and fracture sets. Using cross-tabulation analysis, spring distributions by fracture sets were compared among geological environments, and the deviations related to differences in rock structure and, presumably, to differences in deformational histories. The relation between spring frequencies and rock structures was further investigated by spectral determination, the model introduced in this study. Input data are the spring frequencies and fracture lengths in each geological domain, in addition to the angles between fracture strikes and present-day stress-field orientation (?). The model's output includes the so-called intrinsic densities, a parameter indexing spring occurrence to factors such as fracture type and associated deformational regime and age. The highest densities (12.2 springs/km of lineament) were associated with young shear fractures produced by brittle deformation, and the lowest (0.1) with old tensional and ductile fractures. Spectral determination also relates each orientation class to a dominant structural parameter: where spring occurrence is controlled by ?, the class is parallel to the present-day stress-field orientation; where the control is attributed to the length of fractures, the spring occurrence follows the strike of large-scale normal faults crossing the region. Résumé. Un inventaire des sources artésiennes émergeant de fractures (sources de fractures) a été réalisé dans le bassin de la rivière Pinhão et dans le massif de Morais, dans le nord du Portugal, dans une région couvrant environ 650 km2. Plus de 1,500 sources ont été identifiées et associées à des domaines géologiques et à des ensembles de fractures. Grâce à une analyse de tableaux croisés, les distributions des sources par ensemble de fractures ont été comparées aux situations géologiques et aux écarts liés aux différences dans les structures des roches et, probablement, aux différences dans leurs histoires de déformations. Les relations entre la fréquence des sources et la structure des roches ont été étudiées ensuite par détermination spectrale, modèle présenté dans cette étude. Les données d'entrée sont les fréquences des sources et les longueurs des fractures dans chaque domaine géologique, en plus des angles entre directions de fractures et orientation du champ de contraintes actuel (?). La sortie du modèle donne les densités dites intrinsèques, un paramètre indexant l'existence d'une source à des facteurs tels que le type de fracture et le régime et l'âge associés de la déformation. Les densités les plus fortes (12,2 sources par km de linéament) ont été associées à des fractures jeunes produites par des déformations lentes, et les plus faibles (0,1) aux fractures anciennes ductiles et de tension. La détermination spectrale associe également chaque classe d'orientation à un paramètre structural dominant: quand la présence d'une source est contrôlée par ?, la classe est parallèle à l'orientation actuelle du champ de contrainte; lorsque le contrôle est attribué à la longueur des fractures, la présence de sources suit le plan des failles normales à grande échelle traversant la région. Resumen. Se ha llevado a cabo un inventario de manantiales emergentes de fracturas (manantiales de fracturas) en la cuenca del Río Pinhão y en el Macizo de Morais. El área estudiada ocupa unos 650 km2 y se halla al Norte de Portugal. Se ha identificado más de 1.500 manantiales, los cuales han sido asociados con dominios geológicos y conjuntos de fracturas. Mediante el Análisis de la Tabulación Cruzada, se ha comparado la distribución de los manantiales por conjuntos de fracturas entre ambientes geológicos, así como las desviaciones relacionadas con diferencias en la estructura de la roca y,

Pacheco, Fernando António Leal; Alencoão, Ana Maria Pires

2002-02-01

60

The magmatic record in the Arghash region (northeast Iran) and tectonic implications  

NASA Astrophysics Data System (ADS)

The area of Arghash in northeast Iran, prominent for its gold mineralization, was newly mapped on a scale of 1:20,000 with particular attention to the occurring generations of igneous rocks. In addition, geochronological and geochemical investigations were carried out. The oldest geological unit is a late Precambrian, hornblende-bearing diorite pluton with low-K composition and primitive isotope signatures. This diorite (U-Pb zircon age 554 ± 6 Ma) is most likely a remnant from a Peri-Gondwana island-arc or back-arc basin. About one-third of the map area is interpreted as an Upper Cretaceous magmatic arc consisting of a volcanic and a plutonic part. The plutonic part is represented by a suite of hornblende-bearing medium-K, I-type granitoids (minor diorite, mainly quartz-monzodiorite and granodiorite) dated at 92.8 ± 1.3 Ma (U-Pb zircon age). The volcanic part comprises medium-K andesite, dacite and tuffitic rocks and must be at least slightly older, because it is locally affected by contact metamorphism through the hornblende-granitoids. The Upper Cretaceous arc magmatism in the Arghash Massif is probably related to the northward subduction of the Sabzevar oceanic basin, which holds a back-arc position behind the main Neotethys subduction front. Small occurrences of pillow basalts and sediments (sandstone, conglomerate, limestone) tectonically intercalated in the older volcanic series may be relics of earlier Cretaceous or even pre-Cretaceous rocks. In the early Cenozoic, the Cretaceous magmatic arc was intruded by bodies of felsic, weakly peraluminous granite (U-Pb zircon age 55.4 ± 2.3 Ma). Another strong pulse of magmatism followed slightly later in the Eocene, producing large masses of andesitic to dacitic volcanic rocks. The geochemistry of this prominent Eocene volcanism is very distinct, with a high-K signature and trace element contents similar to shoshonitic series (high P, Zr, Cr, Sr and Ba). High Sr/Y ratios feature affinities to adakite magmas. The Eocene magmatism in the Arghash Massif is interpreted as related to thermal anomalies in crust and mantle that developed when the Sabzevar subduction system collapsed. The youngest magmatic activities in the Arghash Massif are lamprophyres and small intrusions of quartz-monzodiorite porphyries, which cut through all other rocks including an Oligocene-Miocene conglomerate cover series.

Alaminia, Zahra; Karimpour, Mohammad Hassan; Homam, Seyed Massoud; Finger, Fritz

2013-09-01

61

Origin and tectonic significance of the Huangling massif within the Yangtze craton, South China  

NASA Astrophysics Data System (ADS)

As the oldest exposed basement and the typical sedimentary cover of the Yangtze craton, the Huangling massif is a suitable place to decipher the tectonics of South China block. Structural analysis shows that the Huangling massif has an elliptic domal shape with N-S striking long axis, an asymmetric antiform with a steep western flank and a gentle eastern flank. There, three litho-tectonic units are recognized, from inner to outer parts: (1) Archean-Paleoproterozoic metamorphic rocks intruded by Neoproterozoic granitoids; (2) Neoproterozoic to Jurassic sedimentary envelope around the dome core; (3) Cretaceous terrigeneous alluvial-fluvial deposits, unconformably overlying the dome flanks. Coeval with the uplifting of the massif, the pre-Cretaceous strata on the western and eastern flanks of the Huangling massif were involved in a series of folds with nearly N-S axes and layer-parallel slip structures with top-to-the-W and top-to-the-E motion, respectively. The subsequent brittle normal faulting controlled the deposition of the graben or half-graben basins on both flanks. Cooling history reveals that the Huangling massif underwent uplifting between 160 Ma and 110 Ma with an average cooling rate of 2-3 °C/Ma. Moreover, the Huangling area was not significantly affected by the Early Paleozoic and Triassic orogenies of South China. Comparable with the contemporaneous extensional structures, such as metamorphic core complexs, syntectonic plutons bounded by ductile normal faults, and rift-related basins in eastern China, it is proposed that the Huangling massif, might be an extensional structure controlled by a weak crustal extension. In this case, it will represent the western front of the Late Mesozoic lithospheric thinning in entire eastern China. However the compressional model cannot be ruled out.

Ji, Wenbin; Lin, Wei; Faure, Michel; Chu, Yang; Wu, Lin; Wang, Fei; Wang, Jun; Wang, Qingchen

2014-06-01

62

Biodiversity impact of the aeolian periglacial geomorphologic evolution of the Fontainebleau Massif (France)  

NASA Astrophysics Data System (ADS)

Landscape features The geomorphology of the Fontainebleau Massif is noteworthy for its spectacular narrow ridges, up to 10 km long and 0.5 km wide, armored by tightly cemented sandstone lenses and which overhang sandy depressions of about 50m. Denudation of the sandstone pans lead to a highly contrasted landscape, with sandstone ridges ("platières") towering sandy depressions ("vallées") and limestone plateaus ("monts"). This forms the geological frame of the spectacular sceneries of the Fontainebleau Massif (Thiry & Liron, 2007). Nevertheless, there is little know about the erosive processes that have built-up these landscapes. Periglacial processes, and among them aeolian ones, appear significant in the development of the Fontainebleau Massif physiography. The periglacial aeolian geomorphology Dunes and dune fields are known since long and cover about 15% to 25% of the Fontainebleau Massif. The aeolian dunes developed as well on the higher parts of the landscape, as well as in the lower parts of the landscape. The dunes are especially well developed in the whole eastern part of the massif, whereas the western part of the massif is almost devoid of dunes. Nevertheless, detailed mapping shows that dunes can locally be found in the western district, they are of limited extension, restricted to the east facing backslope of outliers. Loamy-sand covers the limestone plateaus of the "monts". The loam cover is of variable thickness: schematically thicker in the central part of the plateaus, where it my reach 3 m; elsewhere it may thin down to 0,20-0,30 m, especially at the plateau edges. Blowout hollows are "negative" morphologies from where the sand has been withdrawed. Often these blowouts are decametric sized and well-delimited structures. Others, more complex structures, are made up of several elongated hectometric hollows relaying each other from and which outline deflation corridor more than 1 km long. A characteristic feature of these blowout hollows is the erosion of the sand beneath the bordering sandstone benches, resulting in overhangs. These structures are the most common in the western district of the Fontainebleau Massif. Ponds develop on the tightly silicified and impermeable sandstone pans that form the "platières". There are permanent ponds and temporary wet zones, formed of interconnected or isolated depressions. The origin of these ponds has to be questioned with regard to the landscape shaping. Their origin is directly bound to the hollowing of uncemented, sandy zones, within the sandstone pans forming the "platières". Erosion by runoff cannot be considered; the only way to hollow them out is by deflation processes. No direct dating of the Quaternary dune and loess deposits of the Fontainebleau Massif exists. Nevertheless, dating of paleopodzols interlayered between drift sands, pond deposits and bones within congelifracts allow relating these periglacial features with the end of the last glacial period. For now, there is no dating to assess what belongs to older glacial periods. Distribution of the aeolian patterns The Fontainebleau Massif displays noteworthy morphological diversities in the various districts of the forest. Some of these differentiations result from geological features, but most of them are related to erosion processes, and among them deflation processes leaved different imprints in the western and eastern districts of the Fontainebleau Massif. The topography played an important role controlling the aeolian processes. Deflation was important in the westerly upwind district. In the westerly front face, aeolian erosion was activated by turbulences around the topographic obstacles. The reliefs funneled the winds and gave rise to swirls that hollow the blowouts. This area displays the sharpest and more chiseled landforms of the massif. Moreover, the sandstone scarps at the edge of the "platières" are high and uncovered, with frequent overhangs. The collapsed sandstone blocks of the "chaos" are im

Thiry, M.; Liron, M. N.

2009-04-01

63

A Probabilistic Seismic Hazard Analysis of Northeast India  

E-print Network

A Probabilistic Seismic Hazard Analysis of Northeast India Sandip Das,a... Ishwer D. Gupta,b... and Vinay K. Guptaa... Seismic hazard maps have been prepared for Northeast India based on the uniform in Northeast India. In the present study, the entire area of Northeast India has been divided into 0.1° grid

Gupta, Vinay Kumar

64

Enhancing Scientific Literacy in the Northeast Kingdom  

NASA Astrophysics Data System (ADS)

An observatory in the Northeast Kingdom of Vermont opens to assist surrounding elementary and high schools with science literacy using astronomy as a capstone science, introducing students to advanced instrumentation, scientific method and data manipulation skills.

Blackwell, John; Moss, B.; Wanzer, S.

2014-01-01

65

Kids' Severe Respiratory Virus Confirmed in Northeast  

MedlinePLUS

... this page, please enable JavaScript. Kids' Severe Respiratory Virus Confirmed in Northeast Health officials urge good hygiene ... Sept. 15, 2014 (HealthDay News) -- The severe respiratory virus believed to have sickened hundreds of U.S. children ...

66

Hydrothermal alterations in the Echassières granitic cupola (Massif central, france)  

NASA Astrophysics Data System (ADS)

Detailed petrographic and mineralogic investigations of an albite-lepidolite granite at Echassières (Massif Central, France; scientific deep drill program) shows the existence of hydrothermal stages which are closely related to the magmatic and structural history. According to fluid inclusion data, K-Ar datations and 18O/16O-D/H compositions of secondary minerals, two successive hydrothermal periods have been recognized. The early one (273 268 million years) produced a series of aluminous phyllosilicates: muscovite, pyrophyllite, donbassite, tosudite, kaolinite which are observed as vein deposits (<10 mm wide) and alteration products of primary minerals in wall-rocks. The vein system was sealed by monomineralic assemblages during a cooling period (400 150°C). This early hydrothermal alteration stage was controlled by interactions of rock with low salinity (1 10 wt% NaCl equivalent) fluids expelled from the granitic body during the cooling processes. The chemical properties of these fluids were the following: low pH, very low Mg and Fe and high Li, Na and K contents. Thermodynamic calculations show that the sequence pyrophyllite, Li-bearing donbassite, tosudite is mostly temperature dependent. From the chemical composition of secondary minerals and isotopic data it can be deduced that these fluids, which have a meteoric origin, have been expelled from the granite body during its cooling period and after interaction with it at high temperature. The late hydrothermal stage corresponds to deposits of fluorite and Fe-Mg rich illite (151 million years) in subvertical fractures. Temperature conditions did not exceed 250° C and fluids came through the surrounding metamorphic rocks into the granitic body. IIlite/smectite mixed-layer minerals have been identified in subvertical fractures which were opened during Tertiary periods. In the host micaschists, successive hydrothermal alterations took place during the cooling of the Beauvoir granite. Early magmatic fluids interacted with these micaschists. Locally, the metamorphic assemblage is replaced by a metasomatic one. Secondary topaz and (F, Li)-rich mica crystals were formed over a range of 450 of 150°C. Later hydrothermal fluids reacted with the country rocks to form phengite-biotite, chlorite-illite and kaolinite over a range of 300 to 150°C. Illite/smectite mixed-layer minerals crystallized in the roof micaschists and within the Beauvoir granite during the Tertiary alteration period. Meteoric water invaded open fractures producing supergene alteration mineral assemblages.

Merceron, Thierry; Vieillard, Philippe; Fouillac, Anne-Marie; Meunier, Alain

1992-11-01

67

Relict permafrost features in Mediterranean environments: the Majella Massif  

NASA Astrophysics Data System (ADS)

The Earth's climate has warmed by about 0.74 °C over the past century and a further warming is predicted for the next decades. Climatic changes propagate downward into the ground and modify soil thermal regime inducing many transformations. It is expected that climate warming will cause increased permafrost melting in high latitude environments and even to total permafrost degradation in regions of lower latitude. In fact, direct observations in the tundra region have shown recent increases in surface and soil temperatures and permafrost melting while in many European mountains recent micro-climatologic studies have identified only small alpine enclaves of screes with permafrost. However, in the literature no reports exist on relict permafrost in the Apennines, except for few observations about the presence of periglacial features such as rock glaciers. Some authors indicated in the past the presence of favourable conditions for preserving sporadic mountain permafrost in the Majella Massif (Central Apennines, Italy), especially in the upper Cannella Valley, where sun irradiation is particularly reduced and winds blow very energetically during the cold period. In the same valley, we monitored soil temperatures at different depths since 2006, in order to study the effects of climate change on pedogenesis and to evaluate the resilience of soils to change. The temperature data referred to the 2006-2007 and those of 2007-2008 showed different trends. The temperatures of the first year were relatively mild and soil freezing was progressively induced from top to down soil. In contrast, during the winter of the second year the temperatures assumed the lowest values (minus 2-3°C) atop the soil, increased down soil (plus 0.5-1.5°C) till he depth of 30-40 cm and decrease to minus 1-2°C more in depth (60 cm); in addition, in depth, the temperature below 0°C were reached before than at surface. This behaviour was evidently due to a deep cold source and interpreted as a clue of the presence of relict permafrost in the ground. The presence of an even deep permafrost would explain the observations made during a previous survey in August 2004, when in a soil pit dug till the depth of 2.6 m we measured temperatures that from 22.6°C at surface progressively decreased till 2.1°C at depth. The area under study is close to the Mount Amaro where there is an active rock-glacier that some authors considered the last relict permafrost feature of Late Pleistocene glacial events that interested the Apennines.

Cocco, S.; Basili, M.; Cioci, C.; di Peco, D.; Brecciaroli, G.; Agnelli, A.; Corti, G.

2009-04-01

68

Northeast Clean Energy Application Center  

SciTech Connect

From October 1, 2009 through September 30, 2013 (“contract period”), the Northeast Clean Energy Application Center (“NE-CEAC”) worked in New York and New England (Connecticut, Rhode Island, Vermont, Massachusetts, New Hampshire, and Maine) to create a more robust market for the deployment of clean energy technologies (CETs) including combined heat and power (CHP), district energy systems (DES), and waste heat recovery (WHR) systems through the provision of technical assistance, education and outreach, and strategic market analysis and support for decision-makers. CHP, DES, and WHR can help reduce greenhouse gas emissions, reduce electrical and thermal energy costs, and provide more reliable energy for users throughout the United States. The NE-CEAC’s efforts in the provision of technical assistance, education and outreach, and strategic market analysis and support for decision-makers helped advance the market for CETs in the Northeast thereby helping the region move towards the following outcomes: • Reduction of greenhouse gas emissions and criteria pollutants • Improvements in energy efficiency resulting in lower costs of doing business • Productivity gains in industry and efficiency gains in buildings • Lower regional energy costs • Strengthened energy security • Enhanced consumer choice • Reduced price risks for end-users • Economic development effects keeping more jobs and more income in our regional economy Over the contract period, NE-CEAC provided technical assistance to approximately 56 different potential end-users that were interested in CHP and other CETs for their facility or facilities. Of these 56 potential end-users, five new CHP projects totaling over 60 MW of install capacity became operational during the contract period. The NE-CEAC helped host numerous target market workshops, trainings, and webinars; and NE-CEAC staff delivered presentations at many other workshops and conferences. In total, over 60 different workshops, conferences, webinars, and presentation were hosted or delivered during the contract period. The NE-CEAC also produced publically available educational materials such as CHP project profiles. Finally, the NE-CEAC worked closely with the relevant state agencies involved with CHP development. In New York, the NE-CEAC played an important role in securing and maintaining funding for CHP incentive programs administered by the New York State Energy Research Development Authority. NE-CEAC was also involved in the NYC Mayor's Office DG Collaborative. The NECEAC was also named a strategic resource for the Connecticut Department of Energy and Environmental Protection’s innovative Microgrid Pilot Program.

Bourgeois, Tom

2013-09-30

69

Pliocene northeast African vegetation change  

NASA Astrophysics Data System (ADS)

Plant leaf wax molecular fossils have yielded key insights into forest-grassland transitions in northeast Africa. The stable carbon isotopic composition (?13C) of sedimentary leaf waxes (including n-alkanoic acids) records variations in the proportions of plants using the C3 (Calvin-Benson) pathway including trees, most shrubs and cool-season grasses versus the C4 (Hatch-Slack) pathway including warm-season grasses and sedges. Here we apply this technique to marine sediments from the Gulf of Aden to characterize northeast African environmental variability during the Pliocene. We sample DSDP Site 231 integrating 3kyr intervals to generate a high-resolution reconstruction spanning 3.7-5.3Ma. The ?13C compositions of downcore C30 n-alkanoic acid analyses average -27.5‰ (?=1.2, n=177), ranging between -30.2 to -24.3‰ with repeated oscillations in the proportions of C4 biomass, presumably corresponding to the eccentricity and precessional modulation of insolation acting on monsoonal precipitation. Although ?13C values cannot be uniquely translated to C4 biomass given the spread in the C3 'endmember', we find complimentary evidence for proportions of C4 biomass from the isotopic spread of the n-alkanoic homologues (n-C28 to n-C32). Comparison to pollen data indicates that at times of low ?13C values, complete forest cover remains unlikely given the presence of grass pollen - taken together these records indicate the presence of C3 grasses. By evaluating our longer record from this site, as well as the terrestrial soil carbonate record, we find the Pliocene has low C4 proportions in comparison to higher proportions in Pleistocene and even late Miocene times. Intriguingly this drop in C4 plant biomass may correspond to a period of elevated atmospheric pCO2. Our ongoing reconstructions are of interest both for constraining environments of hominin evolution and tropical climate variability prior to the onset of Northern Hemisphere Glaciation, in particular during this Pliocene time period of interest as a 'modest greenhouse' world.

Liddy, H.; Sieracki, A.; Feakins, S. J.

2012-12-01

70

Possibilities of the Satellite Imagery to Locate the Forest Decline Areas in the Vosges Massif (France).  

National Technical Information Service (NTIS)

Data of the Vosges Massif (France) from LANDSAT TM data were compared with MSS data and SPOT data on 36 test sites representative of the forest according to species, age, health, and ecological situation. It is shown that the normalized vegetation index o...

M. Lenco, P. Cour

1988-01-01

71

Teaching Quality after the Massification of Higher Education in Taiwan: A Student Perspective  

ERIC Educational Resources Information Center

To explore whether teaching quality was improved by the Taiwan Ministry of Education's implementation of the Teaching Excellence Program after the massification of higher education, the authors used data from a 2007 student survey to build a Teaching Quality Assessment Model to analyze university students' views of the Teaching Excellence…

Dian-Fu, Chang; Yeh, Chao-Chi

2012-01-01

72

Changes in agriculture and the environment in an upland region of the Massif Central, France  

Microsoft Academic Search

This paper presents a case study of an upland region in the Massif Central, which has over the years struggled to find some demographic, economic, ecological and cultural ‘equilibrium’. The field site forms part of the Cévennes National Park, and contains habitats and landscapes of considerable ecological and cultural value. The society and landscape of the uplands studies have essentially

Eileen O’Rourke

2006-01-01

73

Groundwater flow, heat and mass transport in geothermal systems of a Central Alpine Massif.  

E-print Network

Groundwater flow, heat and mass transport in geothermal systems of a Central Alpine Massif waters and natural flows in the Alpine do- main. Description of methods 7 1 Definition, use . . . . . . . . . . . . . . . . . . . . . . 11 1.4 Description of natural flows in Alpine domain

Paris-Sud XI, Université de

74

Sulfur mineralogy and geochemistry of serpentinites and gabbros of the Atlantis Massif (IODP Site U1309)  

E-print Network

Sulfur mineralogy and geochemistry of serpentinites and gabbros of the Atlantis Massif (IODP Site U ultramafic rocks were recovered. Here we characterize variations in sulfur mineralogy and geochemistry-like sulfur contents and isotope compositions of gabbroic rocks and olivine-rich troctolites. Local vari

Gilli, Adrian

75

Reforming Higher Education in Hong Kong towards Post-Massification: The First Decade and Challenges Ahead  

ERIC Educational Resources Information Center

The process of reforming Hong Kong's higher education sector commenced in 2001, and the system moved into the post-massification era. Within five years, the post-secondary participation rate for the 17-20 age cohort had increased to 66 per cent. This target was achieved much earlier than the Government had planned. More educational opportunities…

Wan, Calvin

2011-01-01

76

Antimalarial plants of northeast India: An overview  

PubMed Central

The need for an alternative drug for malaria initiated intensive efforts for developing new antimalarials from indigenous plants. The information from different tribal communities of northeast India along with research papers, including books, journals and documents of different universities and institutes of northeast India was collected for information on botanical therapies and plant species used for malaria. Sixty-eight plant species belonging to 33 families are used by the people of northeast India for the treatment of malaria. Six plant species, namely, Alstonia scholaris, Coptis teeta, Crotolaria occulta, Ocimum sanctum, Polygala persicariaefolia, Vitex peduncularis, have been reported by more than one worker from different parts of northeast India. The species reported to be used for the treatment of malaria were either found around the vicinity of their habitation or in the forest area of northeast India. The most frequently used plant parts were leaves (33%), roots (31%), and bark and whole plant (12%). The present study has compiled and enlisted the antimalarial plants of northeast India, which would help future workers to find out the suitable antimalarial plants by thorough study. PMID:22529674

Shankar, Rama; Deb, Sourabh; Sharma, B K

2012-01-01

77

Antimalarial plants of northeast India: An overview.  

PubMed

The need for an alternative drug for malaria initiated intensive efforts for developing new antimalarials from indigenous plants. The information from different tribal communities of northeast India along with research papers, including books, journals and documents of different universities and institutes of northeast India was collected for information on botanical therapies and plant species used for malaria. Sixty-eight plant species belonging to 33 families are used by the people of northeast India for the treatment of malaria. Six plant species, namely, Alstonia scholaris, Coptis teeta, Crotolaria occulta, Ocimum sanctum, Polygala persicariaefolia, Vitex peduncularis, have been reported by more than one worker from different parts of northeast India. The species reported to be used for the treatment of malaria were either found around the vicinity of their habitation or in the forest area of northeast India. The most frequently used plant parts were leaves (33%), roots (31%), and bark and whole plant (12%). The present study has compiled and enlisted the antimalarial plants of northeast India, which would help future workers to find out the suitable antimalarial plants by thorough study. PMID:22529674

Shankar, Rama; Deb, Sourabh; Sharma, B K

2012-01-01

78

Northeast View From Pathfinder Lander  

NASA Technical Reports Server (NTRS)

This panorama of the region to the northeast of the lander was constructed to support the Sojourner Rover Team's plans to conduct an 'autonomous traverse' to explore the terrain away from the lander after science objectives in the lander vicinity had been met. The large, relatively bright surface in the foreground, about 10 meters (33 feet) from the spacecraft, in this scene is 'Baker's Bench.' The large, elongated rock left of center in the middle distance is 'Zaphod.'

This view was produced by combining 8 individual 'Superpan' scenes from the left and right eyes of the IMP camera. Each frame consists of 8 individual frames (left eye) and 7 frames (right eye) taken with different color filters that were enlarged by 500% and then co-added using Adobe Photoshop to produce, in effect, a super-resolution panchromatic frame that is sharper than an individual frame would be.

Mars Pathfinder is the second in NASA's Discovery program of low-cost spacecraft with highly focused science goals. The Jet Propulsion Laboratory, Pasadena, CA, developed and manages the Mars Pathfinder mission for NASA's Office of Space Science, Washington, D.C. JPL is a division of the California Institute of Technology (Caltech). The IMP was developed by the University of Arizona Lunar and Planetary Laboratory under contract to JPL. Peter Smith is the Principal Investigator.

1997-01-01

79

Petrology of the highlands massifs at Taurus-Littrow - An analysis of the 2-4 mm soil fraction  

NASA Technical Reports Server (NTRS)

The petrography, phase chemistry, and Ar-40/Ar-39 ages of 2-4 mm fragments from the soils of both mare and highlands stations sampled by Apollo 17 are studied. It is found that the massifs consist of a complex stratigraphy of interlayered noritic breccias of varying metamorphic grades, melt rocks, and anorthositic rocks. A stratigraphic correlation of the lithologies within the North Massif and the South Massif is carried out. The petrogenesis of rock types with respect to thermal and impact history is discussed. The observed spinel cataclasites may represent relatively deep material sampled by the Serenitatis event.

Bence, A. E.; Delano, J. W.; Papike, J. J.; Cameron, K. L.

1974-01-01

80

Detachment shear zone of the Atlantis Massif core complex, Mid-Atlantic Ridge, 30°N  

NASA Astrophysics Data System (ADS)

Near-bottom investigations of the cross section of the Atlantis Massif exposed in a major tectonic escarpment provide an unprecedented view of the internal structure of the footwall domain of this oceanic core complex. Integrated direct observations, sampling, photogeology, and imaging define a mylonitic, low-angle detachment shear zone (DSZ) along the crest of the massif. The shear zone may project beneath the nearby, corrugated upper surface of the massif. The DSZ and related structures are inferred to be responsible for the unroofing of upper mantle peridotites and lower crustal gabbroic rocks by extreme, localized tectonic extension during seafloor spreading over the past 2 m.y. The DSZ is characterized by strongly foliated to mylonitic serpentinites and talc-amphibole schists. It is about 100 m thick and can be traced continuously for at least 3 km in the tectonic transport direction. The DSZ foliation arches over the top of the massif in a convex-upward trajectory mimicking the morphology of the top of the massif. Kinematic indicators show consistent top-to-east (toward the MAR axis) tectonic transport directions. Foliated DSZ rocks grade structurally downward into more massive basement rocks that lack a pervasive outcrop-scale foliation. The DSZ and underlying basement rocks are cut by discrete, anastomosing, normal-slip, shear zones. Widely spaced, steeply dipping, normal faults cut all the older structures and localize serpentinization-driven hydrothermal outflow at the Lost City Hydrothermal Field. A thin (few meters) sequence of sedimentary breccias grading upward into pelagic limestones directly overlies the DSZ and may record a history of progressive rotation of the shear zone from a moderately dipping attitude into its present, gently dipping orientation during lateral spreading and uplift.

Karson, J. A.; Früh-Green, G. L.; Kelley, D. S.; Williams, E. A.; Yoerger, D. R.; Jakuba, M.

2006-06-01

81

Cross-Section of the Atlantis Massif --- Geologic Framework for the Lost City Hydrothermal Vent Field  

NASA Astrophysics Data System (ADS)

The Atlantis Massif is an oceanic core complex situated on 1.5-Ma-old crust at 30° N on the Mid-Atlantic Ridge. Its domed, corrugated upper surface is interpreted as a major detachment fault. The steep, mass-wasted south wall of the massif provides a window into the architecture of the footwall of this detachment fault and underlying rocks. Alvin and Argo II were used to collect outcrop-scale geological data in the context of fine-scale bathymetry from ABE surveys. Variably serpentinized peridotite and lesser gabbroic rock form the bulk of the massif. Outcrops below ˜1800 m.b.s.l. are generally massive, grading upward into a region cut by an array of shear zones, faults, and joints. The uppermost ˜50 m of basement rock show a pervasive anastomosing foliation dipping gently west and cropping out for about 3 km. Samples from this interval include mylonitic material wrapping around less deformed phacoids of basement rock. The mylonites are unconformably overlain by a thin (1-3 m) cap of breccia, grading upward into pelagic limestone. The breccia is massive to crudely bedded with both clast- and matrix-supported textures. It includes subangular clasts of basalt and serpentinite in a limestone matrix. Small normal faults offset all of these units and the unconformity. The Lost City Hydrothermal Vent Field sits on top of the breccia unit. We interpret the mylonites as a detachment fault responsible for exhumation of the upper mantle material that forms the core of the massif. The overlying sedimentary rocks represent debris shed onto the detachment fault surface when it defined the median valley wall. As the detachment fault surface moved off axis and flattened into its present orientation, the sedimentary material changed progressively from clastic to pelagic and became consolidated. This assemblage may cover the rest of the Atlantis Massif and occur on other oceanic core complexes.

Williams, E. A.; Karson, J. A.; Kelley, D. S.; Früh-Green, G. L.

2003-12-01

82

Ecotourism demand in North-East Italy.fig Ecotourism demand in North-East Italy  

E-print Network

Ecotourism demand in North-East Italy.fig 1 Ecotourism demand in North-East Italy Tempesta T.1-alimentary Economics and Policy, University of Milan, Italy Email: tiziano.tempesta@unimi.it 2 PhD Student, Department of Economics, University of Udine, Italy 3 Professor, Department of Economics, University of Udine, Italy

Tempesta, Tiziano

83

Timing of Variscan HP-HT metamorphism in the Moldanubian Zone of the Bohemian Massif: UPb SHRIMP dating on multiply zoned zircons from a granulite from the Dunkelsteiner Wald Massif, Lower Austria  

Microsoft Academic Search

In an attempt to better constrain the timing of Variscan HP-HT metamorphism in the SE Bohemian Massif we have dated zoned\\u000a zircons from a garnet-kyanite granulite of granitic composition from the Dunkelsteiner Wald Massif, Lower Austria, by means\\u000a of sensitive high-resolution ion microprobe (SHRIMP) technique. In order to combine isotopic information with crystal growth\\u000a textures, CL and BSE images were

Gertrude Friedl; Rob A. Cooke; Friedrich Finger; Neal J. McNaughton; Ian R. Fletcher

84

Research of dynamical Characteristics of slow deformation Waves as Massif Responses on Explosions  

NASA Astrophysics Data System (ADS)

The research of massif state with use of approaches of open system theory [1-3] was developed for investigation the criterions of dissipation regimes for real rock massifs, which are under heavy man-caused influence. For realization of that research we used the data of seismic catalogue of Tashtagol mine. As a result of the analyze of that data we defined character morphology of phase trajectories of massif response, which was locally in time in a stable state: on the phase plane with coordinates released by the massif during the dynamic event energy E and lg(dE/dt) there is a local area as a ball of twisted trajectories and some not great bursts from that ball, which are not greater than 105 joules. In some time intervals that burst can be larger, than 105 joules, achieving 106 joules and yet 109 joules. [3]. Evidently there are two reciprocal depend processes: the energy accumulation in the attracted phase trajectories area and resonance fault of the accumulated energy. But after the fault the system returns again to the same attracted phase trajectories area. For analyzing of the thin structure of the chaotic area we decided to add the method of processing of the seismic monitoring data by new parameters. We shall consider each point of explosion as a source of seismic or deformation waves. Using the kinematic approach of seismic information processing we shall each point of the massif response use as a time point of the first arrival of the deformation wave for calculation of the wave velocity, because additionally we know the coordinates of the fixed response and the coordinates of explosion. The use of additional parameter-velocity of slow deformation wave propagation allowed us with use method of phase diagrams identify their hierarchic structure, which allow us to use that information for modeling and interpretation the propagation seismic and deformation waves in hierarchic structures. It is researched with use of that suggested processing method the thin structure of the chaotic area for two responses of the massif on a high energetic explosion in the northern and southern parts of it. The results are significant for understanding the high energetic rock shock and evaluation a criterion for massif stability estimation. The work is supported by the grant RFBR 10-05-00013 and Integration Project 2012-2014 with SB RAS Key words: massif response, slow deformation waves, seismic mine catalogue, analyze of observed data, phase diagrams. References 1. Naimark Y.I.,Landa P.S. Stochastic and chaotic oscillations//Moscow: Book House "LIBROKOM", 2009.-p.424. 2. Chulichkov A.I. Mathematical models of nonlinear dynamics.Moscow: Fizmatlit, 2003.-p.294. 3. Hachay O.A.,Khachay O.Y.,Klimko V.K.,Shipeev O.V. Reflection of synergetic features of rock massif state under man-caused influence after the data of mine seismological catalogue.// Mine informational and analytical bulletin MSMU,6, 2010,p.259-271.

Hachay, Olga; Khachay, Oleg; Shipeev, Oleg

2013-04-01

85

Protholithic age and geochemistry of magmatic rocks from the Serbo-Macedonian massif (south Serbia, southwest Bulgaria and east Macedonia)  

NASA Astrophysics Data System (ADS)

The Serbo-Macedonian Massif (SMM) represents a complex crystalline terrane situated between the two diverging branches of the Eastern Mediterranean Alpine orogenic system, the northeast-vergent Carpatho-Balkanides and the southwest-vergent Dinarides and the Hellenides. It is outcropping from the Pannonian basin in the north, to the Agean Sea in the south, along the central and southeastern Serbia, southwestern Bulgaria, eastern Macedonia and southern Greece. It's affiliation to European and/or African plate basement is still questionable due to the lack of reliable geochronological data and a detailed structural investigation. The SMM is the key area for understanding the bipolarity of the Alpine orogenic system, as well as the interaction of the Pannonian and Aegean back-arc extension during the Cenozoic time. The SMM is generally considered to comprise an Upper (low-grade) and a Lower (medium to high-grade) unit (Dimitrijevi?, 1959). The protoliths of both units are reported as volcano-sedimentary successions, which have been later intruded by magmatic rocks during several pulses. On our mission to discern the main magmatic episodes and the geodynamic evolution of the SMM; we have analysed zircon grains of metamorphic rocks from both units, as well as undeformed igneous rocks. LA-ICP-MS analyses were carried out on zircon grains in order to obtain the protolith ages and geochemical analyses were carried out on the total of nineteen samples from different magmatic rocks. Our first results reveal the presence of the Permo-Triassic (253±13 Ma) and a late Variscan magmatism (Carboniferous; 315±9 Ma) in the Serbian part of the SMM; additionally, the Ordovician (490-440 Ma) and the Cadomian (Cambrian; 505 Ma and older) event complete the magmatic evolution in the Serbian part of the SMM. The new geochronological constraints, together with the field relationships, allowed us to conclude: a) The Lower SMM consists of a Cadomian (Ediacaran-early Cambrian) volcano-sedimentary sequences and magmatics, which were intruded by Ordovician magmatic rocks; b) The Upper SMM (Vlasina and Morava unit) contains a volcano-sedimentary sequence, which is intruded by the Cadomian magmatic rocks; c) In contrast to the Lower complex, no Ordovician age magmatics were documented in the Upper unit, and d) Lower and Upper SMM were covered by Silurian-Devonian sedimentary sequence. The youngest magmatic event in the SMM occurred in the late Eocene, it is related to the intrusion of Surdulica granodiorite and subsequent latitic volcanism.

Anti?, M.; Peytcheva, I.; von Quadt, A.; Kounov, A.; Trivi?, B.; Serafimovski, T.; Tasev, G.; Gerdjikov, I.

2012-04-01

86

Climate change in the Brazilian northeast  

NASA Astrophysics Data System (ADS)

Climate Change, Impacts and Vulnerabilities in Brazil: Preparing the Brazilian Northeast for the Future; Natal, Brazil, 27 May to 01 June 2012 The variability of the semiarid climate of the Brazilian northeast has enormous environmental and social implications. Because most of the population in this area depends on subsistence agriculture, periods of severe drought in the past have caused extreme poverty and subsequent migration to urban centers. From the ecological point of view, frequent and prolonged droughts can lead to the desertification of large areas. Understanding the causes of rainfall variability, in particular periods of severe drought, is crucial for accurate forecasting, mitigation, and adaptation in this important region of Brazil.

Rodrigues, Regina R.; Haarsma, Reindert J.; Hoelzemann, Judith J.

2012-10-01

87

2. Light tower and keeper's house, view southwest, north northeast ...  

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

2. Light tower and keeper's house, view southwest, north northeast side of tower, northeast and northwest sides of keeper's house - Wood Island Light Station, East end of Wood Island, at mouth of Soo River, Biddeford Pool, York County, ME

88

19. INTERIOR OF NORTHEAST REAR BEDROOM SHOWING ALUMINUMFRAME SLIDING GLASS ...  

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

19. INTERIOR OF NORTHEAST REAR BEDROOM SHOWING ALUMINUM-FRAME SLIDING GLASS WINDOWS. VIEW TO NORTHEAST. - Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Creek, Bishop, Inyo County, CA

89

2. FOREMAN'S HOUSE. SOUTHWEST SIDE. VIEW TO NORTHEAST. Rainbow ...  

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

2. FOREMAN'S HOUSE. SOUTHWEST SIDE. VIEW TO NORTHEAST. - Rainbow Hydroelectric Facility, Foreman's House, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

90

1. TWOSTALL GARAGE. FRONT (SOUTHWEST) SIDE. VIEW TO NORTHEAST. ...  

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

1. TWO-STALL GARAGE. FRONT (SOUTHWEST) SIDE. VIEW TO NORTHEAST. - Rainbow Hydroelectric Facility, Two Stall Garage, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

91

1. THREESTALL GARAGE. SOUTHEAST AND NORTHEAST SIDES. VIEW TO WEST. ...  

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

1. THREE-STALL GARAGE. SOUTHEAST AND NORTHEAST SIDES. VIEW TO WEST. - Rainbow Hydroelectric Facility, Three Stall Garage, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

92

6. CLUBHOUSE. SOUTHWEST SIDE. VIEW TO NORTHEAST. Rainbow Hydroelectric ...  

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

6. CLUBHOUSE. SOUTHWEST SIDE. VIEW TO NORTHEAST. - Rainbow Hydroelectric Facility, Clubhouse, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

93

4. CLUBHOUSE. NORTHEAST SIDE. VIEW TO SOUTHWEST. Rainbow Hydroelectric ...  

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

4. CLUBHOUSE. NORTHEAST SIDE. VIEW TO SOUTHWEST. - Rainbow Hydroelectric Facility, Clubhouse, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

94

2. TOOL HOUSE. NORTHEAST AND SOUTHEAST SIDES. VIEW TO WEST. ...  

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

2. TOOL HOUSE. NORTHEAST AND SOUTHEAST SIDES. VIEW TO WEST. - Rainbow Hydroelectric Facility, Tool House, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

95

3. CLUBHOUSE. FRONT (SOUTHEAST) FACADE AND NORTHEAST SIDE. VIEW TO ...  

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

3. CLUBHOUSE. FRONT (SOUTHEAST) FACADE AND NORTHEAST SIDE. VIEW TO WEST. - Rainbow Hydroelectric Facility, Clubhouse, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

96

4. HOUSE No. 16. NORTHEAST SIDE. VIEW TO SOUTHWEST. ...  

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

4. HOUSE No. 16. NORTHEAST SIDE. VIEW TO SOUTHWEST. - Rainbow Hydroelectric Facility, House No. 16, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

97

1. TOOL HOUSE. NORTHEAST AND NORTHWEST SIDES. VIEW TO SOUTHEAST. ...  

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

1. TOOL HOUSE. NORTHEAST AND NORTHWEST SIDES. VIEW TO SOUTHEAST. - Rainbow Hydroelectric Facility, Tool House, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

98

2. THREESTALL GARAGE. NORTHEAST SIDE. VIEW TO SOUTHWEST. Rainbow ...  

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

2. THREE-STALL GARAGE. NORTHEAST SIDE. VIEW TO SOUTHWEST. - Rainbow Hydroelectric Facility, Three Stall Garage, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

99

4. FOREMAN'S HOUSE. NORTHEAST SIDE. VIEW TO SOUTHWEST. Rainbow ...  

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

4. FOREMAN'S HOUSE. NORTHEAST SIDE. VIEW TO SOUTHWEST. - Rainbow Hydroelectric Facility, Foreman's House, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

100

3. TWOSTALL GARAGE SOUTHEAST AND NORTHEAST SIDES. VIEW TO WEST. ...  

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

3. TWO-STALL GARAGE SOUTHEAST AND NORTHEAST SIDES. VIEW TO WEST. - Rainbow Hydroelectric Facility, Two Stall Garage, On north bank of Missouri River 2 miles Northeast of Great Falls, & end of Rainbow Dam Road, Great Falls, Cascade County, MT

101

55. VIEW TO NORTHEAST OF MOTOR AND REDUCTION GEAR NO. ...  

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

55. VIEW TO NORTHEAST OF MOTOR AND REDUCTION GEAR NO. 1: View towards the northeast of Motor and Reduction Gear No. 1, installed in 1957. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

102

11. DETAIL SHOWING ROLLING ENGINE DECK AND NORTHEAST TRUSS OF ...  

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

11. DETAIL SHOWING ROLLING ENGINE DECK AND NORTHEAST TRUSS OF SUPERSTRUCTURE. Looking northeast. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Test Stand 1-A, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

103

1. BUILDING 522, SOUTH SIDE, OBLIQUE VIEW, FROM NORTHEAST CORNER ...  

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

1. BUILDING 522, SOUTH SIDE, OBLIQUE VIEW, FROM NORTHEAST CORNER OF BUILDING 431, LOOKING NORTHEAST. - Oakland Naval Supply Center, Aeronautical Materials Storehouses, Between E & G Streets, between Fourth & Sixth Streets, Oakland, Alameda County, CA

104

3. Light tower and fog signal house, view northeast, west ...  

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

3. Light tower and fog signal house, view northeast, west and south sides - Great Duck Island Light Station, At southern tip of Great Duck Island southeast of Bass Harbor & northeast of Frenchboro, Frenchboro, Hancock County, ME

105

Strain localization on an oceanic detachment fault system, Atlantis Massif, 30°N, Mid-Atlantic Ridge  

Microsoft Academic Search

Microstructural observations, mineral chemistry, and the spatial distribution of deformation fabrics recorded in outcrop samples collected from Atlantis Massif, the active inside corner high at 30°N, Mid-Atlantic Ridge, suggest that strain is localized near the subhorizontal domal surface hypothesized to be an exposed detachment fault. Deformation textures in peridotite and gabbro indicate that high-temperature (>500°C) strain occurred via crystal-plastic flow

Timothy Schroeder; Barbara E. John

2004-01-01

106

Saprolite, soils, and sediments in the Rhenish Massif as records of climate and landscape history  

Microsoft Academic Search

The Rhenish Massif, at the western boundary of Germany, consists predominantly of Devonian slates and siltstones, which over large areas have been altered to saprolite. The distribution and characteristics of saprolites, Pleistocene periglacial slope deposits (PPSD), Holocene colluvium and soils were investigated along a 2.5m deep gas pipeline ditch in 20 sections with an overall length of 19km.The results are

D. Sauer; P. Felixhenningsen

2006-01-01

107

Harzburgite Peak: A large mantle tectonite massif in ophiolite from southwest Yukon  

Microsoft Academic Search

Detailed mapping of bedrock in the northern Wellesley basin adjacent to the Donjek River revealed a coherent sequence of cumulus-textured gabbros, sheeted dykes, and a large massif of spinel harzburgite. The coarse-textured harzburgite tectonite covers an area of ~75 km2, and is generally well preserved, making it one of the largest and most exceptional mantle tectonite bodies yet recognized in

D. Canil; S. T. Johnston

108

High-pressure–low-temperature metamorphism of metasedimentary rocks, southern Menderes Massif, western Turkey  

Microsoft Academic Search

Kilometer-scale lenses of quartz-rich metasedimentary rocks crop out in a discontinuous belt along the southern margin of the Menderes Massif, Turkey, and preserve evidence for high-pressure–low-temperature (HP–LT) metamorphism related to subduction of a continental margin during Alpine orogeny. Kyanite schist, quartzite, and quartz veins contain kyanite+phengite+Mg-chlorite, and the veins also contain magnesiocarpholite. A deformed carbonate metaconglomerate juxtaposed with the quartzite-dominated

Donna L. Whitney; Christian Teyssier; Seth C. Kruckenberg; Valerie L. Morgan; Lindsay J. Iredale

2008-01-01

109

Des volcans et des hommes depuis le dernier interglaciaire en Basse Auvergne (Massif Central, France)  

E-print Network

of volcanic activity . In the Massif Central, selected case- studies allow us to discuss the effect of local climatiques quaternaires ont rythmé la différenciation des biotopes. Le volcanisme a brutalement perturbé l et provoqué des modifications brutales des versants et des tracés des cours d'eau : c'est le cas en

Paris-Sud XI, Université de

110

Petrology of the ultramafic and basic rocks of betancuria massif, fuerteventura Island (Canarian Archipelago)  

Microsoft Academic Search

The petrological and geochemical aspects of the ultramafic and basic plutonic rocks of Betancuria Massif are examined. The\\u000a rocks consist of gradational varieties of wehrlite, pyroxenite, olivine-gabbro and gabbro formed mainly by magnesium-rich\\u000a olivine, clinopyroxene and plagioclase. The Complex exhibits structures and textures characteristic of layered igneous rocks;i.e., banding, layering, lamination, etc...; rocks are therefore considered as cumulates or magmatic

P. Gastesi

1969-01-01

111

Modlisation de machines commutation lectronique comportant des matriaux massifs avec circulation de courants de Foucault  

E-print Network

745 Modélisation de machines à commutation électronique comportant des matériaux massifs avec'étude de machines électriques alimentées en tension par conver- tisseurs statiques et aux rotors desquelles définissant le champ électromagnétique dans la machine. La méthode d'étude proposée est illustrée par l

Paris-Sud XI, Université de

112

Tectonodynamics of fluid-conducting structural elements and migration of radionuclides in massifs of crystalline rocks  

Microsoft Academic Search

The principal aspects of reconstruction of conditions and paths of fluid migration in massifs of crystalline rocks are considered.\\u000a The spatiotemporal relationships between stress fields, brittle failure, and migration of radionuclides are discussed. The\\u000a main attention is focused on the staged character of tectonic events, fluid circulation conditions, and the sequence of uranium\\u000a mineral formation as determined with structural, geological,

V. A. Petrov; M. Lespinasse; J. Hammer

2008-01-01

113

Basement shear zones development and shortening kinematics in the Ecrins Massif, Western Alps  

NASA Astrophysics Data System (ADS)

the Western Alps, Oligocene shortening affected a highly heterogeneous European crust with Liassic half-grabens inherited from the rifting stage and the finite deformation was strongly partitioned between the rigid basement and the weak Jurassic sediments. In the Ecrins Massif (Oisans, external crystalline massifs), where the half-grabens are best exposed and preserved, compressional structures within the basement have to date never been described in details. This massif was shortened under moderate metamorphic conditions (250-350°C and 0.1-0.5 GPa), and the rheological contrast between the basement and the cover is strong. While the sediments are intensely folded, the cover-basement interface presents apparent open folds underlined by the Lower Triassic layers. The basement itself shows a more localized deformation along several brittle-ductile shear zones. We here report new evidences of such brittle-ductile shear zones characterized by anastomosed phyllonitic shear bands rich in phengite and quartz, a low-strength material where strain has localized. New detailed maps of reverse shear zones, faults, schistosity, and stretching lineations in both the cover and the basement are provided. We show that the Oligocene crustal shortening was mainly E-W to ENE-WSW. Local N-S to NW-SE shortening occurred and was limited to the eastern border of the Ecrins Massif, around the Penninic Frontal Thrust, which likely was a sinistral transpressive structure in this area. Finally, new balanced cross sections show that these basement shear zones have accommodated more than 50% of the Oligocene crustal shortening.

Bellanger, M.; Bellahsen, N.; Jolivet, L.; Baudin, T.; Augier, R.; Boutoux, A.

2014-02-01

114

Chain Lakes massif, west central Maine: northern Appalachian basement or suspect terrane  

SciTech Connect

The Chain Lakes massif of west-central Main is a 3 km thick sequence of diamictite and aquagene metavolcanics and metasediments, which contrasts strikingly with its surrounding Paleozoic rocks in lithology, structural style and metamorphic grade. The rocks of the massif are characterized by mineral assemblages developed during two separate metamorphic events. The first, of second sillimanite grade, is reflected by qtz-oligoclase-Kspar-sillimanite-biotite and muscovite. The second metamorphism is a retrograde event of greenschist facies, and chlorite grade. Isotopic Rb-Sr and Sm-Nd whole rock, and Rb-Sr mineral analyses of samples of the diamictite members, now gneiss and granofels, indicate that the first prograde metamorphism occurred at 770 Ma. with the retrograde event at approximately 405 Ma. Due to the restricted range of /sup 147/Sm//sup 144/Nd, no Sm-Nd isochron age could be determined. However, model ages for both Sr and Nd are approximately 1500 Ma for derivation of the Chain Lakes protolith material from depleted mantle. Lithology, bounding formations, complexes and plutons, and the isotopic data support previous contentions that the Chain Lakes massif is a suspect terrane. However, similarities with Proterozoic rocks along the Eastern Margin, as well as recent suggestions of similar rocks underlying the Kearsarge-Central Main synclinorium may suggest the possible widespread occurrence of dismembered masses of a perhaps once coherent, Precambrian terrane underlying the Northern Appalachians.

Cheatham, M.M.; Olszewski, W.J. Jr.; Gaudette, H.E.

1985-01-01

115

Re-Os isotopic evidence for a lower crustal origin of massif-type anorthosites  

PubMed

Massif-type anorthosites are large igneous complexes of Proterozoic age. They are almost monomineralic, representing vast accumulations of plagioclase with subordinate pyroxene or olivine and Fe-Ti oxides--the 930-Myr-old Rogaland anorthosite province in southwest Norway represents one of the youngest known expressions of such magmatism. The source of the magma and geodynamic setting of massif-type anorthosites remain long-standing controversies in Precambrian geology, with no consensus existing as to the nature of the parental magmas or whether these magmas primarily originate in the Earth's mantle or crust. At present, massif-type anorthosites are believed to have crystallized from either crustally contaminated mantle-derived melts that have fractionated olivine and pyroxenes at depth or primary aluminous gabbroic to jotunitic melts derived from the lower continental crust. Here we report rhenium and osmium isotopic data from the Rogaland anorthosite province that strongly support a lower crustal source for the parental magmas. There is no evidence of significantly older crust in southwest Scandinavia and models invoking crustal contamination of mantle-derived magmas fail to account for the isotopic data from the Rogaland province. Initial osmium and neodymium isotopic values testify to the melting of mafic source rocks in the lower crust with an age of 1,400-1,550 Myr. PMID:10866196

Schiellerup; Lambert; Prestvik; Robins; McBride; Larsen

2000-06-15

116

Geodynamic movements and deformations of the Sudetic structural unit of the Bohemian Massif  

NASA Astrophysics Data System (ADS)

The African plate pushes to European orogenic Alpine structures that transfer the compression further to Variscan structural units, including the Bohemian Massif. Central parts of the Bohemian Massif are relatively deep-seated and, therefore, some of marginal parts of the Massif and its border geological structures should be affected intensively and moved distinctly with respect to the central parts. The geodynamical GPS network EAST SUDETEN is located just over the area mentioned above, i.e. it covers both kinetically quasi-effected and quasi-non-effected structural blocks. GPS data observed already for six annual campaigns (1997-2002) were processed and movement vectors of individual network sites were assessed. Applied data processing did not allow errors in the horizontal direction 2 mm and in the vertical direction 5-6 mm to be exceeded. Since time series of coordinate changes for several network sites gave rather pronounce movement trends, preliminary deformations among individual structural blocks were evaluated and compared to other geological, geophysical and geodetic materials. The investigation has been supported by the Grant Agency of the Czech Republic, projects 205/97/0679 and 205/01/0480, and by the research programme of the Ministry of Education, Youth and Sport of the Czech Republic, project LN00A005 "Dynamics of the Earth".

Schenk, V.; Jechumtálová, Z.; Schenková, Z.; Kottnauer, P.

2003-04-01

117

U Pb dating of high temperature metamorphic episodes in the Kon Tum Massif (Vietnam)  

NASA Astrophysics Data System (ADS)

In Vietnam, recent studies demonstrated that the Kon Tum Massif was part of the Indosinian mountain system, together with the Truong Son Belt. One sector of the Kon Tum Massif (Song Ba valley) is a granulite facies terrain for which Ar-Ar and U-Pb ages cluster around 245-250 Ma. In the area of Song Bien river, also metamorphosed under granulite facies conditions, Ar-Ar ages of 410 Ma are displayed by biotite. In this study, U-Pb dating of monazite and zircon has been used to understand the reason for these two groups of ages, taking into account the metamorphic mineral assemblages related to granulite facies metamorphism in the two districts. For granulites of Song Ba valley, ages of 245-250 Ma are confirmed from monazites. In the Song Bien district, ages of 465-470 Ma displayed by monazites are interpreted to correspond to the metamorphic climax. Zircons from one of these samples record the age of anatexis that has affected the granulitic rocks. The younger age recorded in the Song Ba valley is considered to reflect high temperature related to charnockitic intrusions emplaced near the end of the Indosinian orogeny, overprinting the earlier formed granulites and resetting the U-Pb and Ar-Ar ages. For the first time, two HT events are dated in the Kon Tum Massif, one occurring during the Ordovician and the other during the Permo-Triassic.

Roger, Françoise; Maluski, Henri; Leyreloup, André; Lepvrier, Claude; Truong Thi, Phan

2007-05-01

118

NORTHEAST VIEW OF FOUNDRY FROM TOP OF GREY IRON CUPOLA ...  

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

NORTHEAST VIEW OF FOUNDRY FROM TOP OF GREY IRON CUPOLA SHOWING CORE ROOM ROOF DIRECTLY NORTHEAST, GREY IRON FOUNDRY TO THE RIGHT, MALLEABLE IRON CUPOLAS AND FOUNDRY NORTHEAST OF GREY IRON FOUNDRY WITH THE BRASS FOUNDRY IN THE REAR. - Stockham Pipe & Fittings Company, 4000 Tenth Avenue North, Birmingham, Jefferson County, AL

119

Copper complexation in the Northeast Pacific  

Microsoft Academic Search

Copper titrations were conducted at sea with differential pulse anodic stripping voltammetry to examine the degree to which copper was associated with organic ligands. Greater than 99.7% of the total dissolved copper in surface waters of the central Northeast Pacific shallower than 200 m was estimated to be associated with strong organic complexes. Below 200 m, increasing proportions of inorganic

KENNETH H. COALE; KENNETH W. BRULAND

1988-01-01

120

Pulpwood Production in the Northeast, 1982.  

National Technical Information Service (NTIS)

The annual report contains information compiled from a canvas of all pulpmills that use pulpwood produced in the 14 Northeastern States. In 1982, 6.3 million cords of pulpwood roundwood were harvested from the forests of the Northeast Region. This was a n...

R. H. Widmann

1983-01-01

121

Seasonal Weed Control for Northeast Florida  

E-print Network

1 Seasonal Weed Control for Northeast Florida #12;2 Introduction Weed control is a constant battle things you can do to reduce the economic impact of weeds. A healthy pasture has fewer weed problems. Soil to maintain a weed free pasture. Always use certi- fied seed to establish pastures and hay fields. Clean

Jawitz, James W.

122

Northeast Solar Energy Research Center (NSERC)  

E-print Network

Northeast Solar Energy Research Center (NSERC) A multi-purpose research facility on the BNL campus Solar PV Array Size and Type · ~1.0 MW total ­ Area 1 sized for testing utility-scale inverters · System panel technologies with crystalline silicon PV modules making up the bulk of the array · Capability

Ohta, Shigemi

123

Composition variations of accessory lamprophyllite in Lovozero massif: hidden layering of non-cumulus mineral.  

NASA Astrophysics Data System (ADS)

Composition variations of accessory lamprophyllite in Lovozero massif: hidden layering of non-cumulus mineral. Lovozero massif is a beautiful sample of layered agpaitic intrusion. Rhythmic modal layering is visible in mountainsides and drill-cores. Recently cryptic layering was found in composition of cumulus minerals: loparite (Kogarko et al., 2002), clinopyroxen (Kogarko, Williams, 2005, Zaitsev, Senin 2006) and eudialite (Kogarko, Williams, 2008). We studied chemical variation of lamprophyllite - a principal accessory mineral of eudialite lujavrites and porthyritic lujavrites of Lovozero massif. Three varieties of compositions discovered in rocks of Lovozero massif: Sr-lamprophyllite, contain <0.2 Ba and ~ 0.08 K(f.u), Ba-Sr lamprophyllite, contain 0.4-0.9 Ba and 0.10-0.20 K (f.u) and baritolamprophyllite, contain 1.4 and more f.u. Ba. Sr lamprophyllite is the most abounded. Sometimes it is corroded by the Ba-lamprophyllite. In crossection of eudialite lugavrite complex Fe content in Sr lamprophyllite increase and Ca content - decrease upward. In porphyritic lujavrites Sr lamprophyllite upward increase Mn content whereas Mg, Ca and Fe content decrease. Ba/Sr ratio does not show any tendency in both cases. Experimental study of lamprophyllite-nepheline diagram and melting of lamprophyllite group minerals show that paragenesys nepheline + lamprophyllite might exist below 833°C and lamprophyllite fractionation must increase Ba/Sr ratio in melt (Zaitsev et al., 2013). Lamprophyllite composition evolution inside one rock (namely from lamprophyllite to barytolamprophyllite) is in agreement with experimentally founded. From other hand, independence of Ba/Sr ration in lamprophyllite from the vertical position of sample shows that lamrophyllite wasn't cumulative mineral during crystallization of magma of Lovozero massif. From these data, features of lamprophyllite composition variations strictly locate they place in crystallization history as a crystallized from interstitial melt. Vertical variations of lamprophyllite composition is conform to variations of pyroxene composition: in clinopyroxen of differentiated and eudialite complex Na,Fe and Ti content increase upward and Ca, Mg - decrease (Kogarko Williams, 2005) in porphyritic lujavrites Na, Ti, Mn content increase and Ca, Mn - decrease (Zaitsev, Senin 2006). These patterns can be explained if we assume that at each level of the lamprophyllite crystallized from melt, equilibrated with pyroxene, formed primarily cumulative matrix of rocks. Thus, the composition of lamprophyllite changes systematically upwards because it inherits patterns composition of primary magmatic clinopyroxene.

Zaitsev, Victor; Kogarko, Lia

2014-05-01

124

Geophysical Constraints on the Nature of Atlantis Massif, 30°N MAR  

NASA Astrophysics Data System (ADS)

Recent drilling at Atlantis Massif, Mid-Atlantic Ridge 30°N, provides new insights into oceanic core complex (OCC) development. IODP Expeditions 304/305 had high recovery in the footwall of the detachment capping the central dome of the massif: Hole U1309B, 100 m deep; Hole U1309D, 1415 m. Recovery of a dominantly gabbroic sequence challenges prior interpretations that this OCC was mainly ultramafic, geophysical data having suggested much of the uplifted core was mantle peridotite, with Moho less than 1 km deep. Although models based on prior analysis fit the data well and were consistent with outcrops of serpentinized peridotite on the south face of Atlantis Massif, it is now clear that additional complexity needs to be incorporated in the geophysical analysis. The southern ridge is morphologically distinct from the central dome. Does this indicate that the south and central parts of this OCC are fundamentally different? Or, is the serpentinized peridotite exposed on the south wall (and found in a few loose fragments on top of the central dome) a thin veneer of mantle rock that has deformed around a dominantly gabbroic core? The occurrence of many gabbroic samples from the southern ridge could support the latter but models of serpentinization that drives the Lost City hydrothermal system near the peak of the massif might favor the former. New analysis of geophysical data provide further constraints on the scale of possible variability. Prior seismic analysis suggested fresh mantle might shoal by a couple hundred meters 1-2 km north of Site U1309. In contrast, gravity data suggest the highest density rocks occur at and to the south of the site. These observations will be combined in a 3D model of Atlantis Massif and we expect to report initial results. Downhole logging indicates that bulk density increases steadily from 2.8 to 2.9 g/cc downhole. Log and core sample seismic velocity are variable within a 5.5-6.8 km/s range, lower values where degree of alteration is greatest, higher values in olivine-rich units. Initial analysis of borehole seismometer recordings of airgun shots suggests a high velocity interval occurs within the fresnel zone (100's m) of this experiment. Postcruise analysis is required to rule out noise bias so we expect to report whether this indication of velocity greater than 7 km/s at 580-635 m depth is confirmed. If it is, this could indicate that prior refraction analysis detected a lens of high velocity rock but not the regional Moho.

Blackman, D.

2005-12-01

125

Mapping of the Ronda peridotite massif (Spain) from AVIRIS spectro-imaging survey: A first attempt  

NASA Technical Reports Server (NTRS)

In both AVIRIS and ISM data, through the use of mixing models, geological boundaries of the Ronda massif are identified with respect to the surrounding rocks. We can also yield first-order vegetation maps. ISM and AVIRIS instruments give consistent results. On the basis of endmember fraction images, it is then possible to discard areas highly vegetated or not belonging to the peridotite massif. Within the remaining part of the mosaic, spectro-mixing analysis reveals spectral variations in the peridotite massif between the well-exposed areas. Spatially organized units are depicted, related to differences in the relative depth of the absorption band at 1 micron, and it may be due to a different pyroxene content. At this stage, it is worth noting that, although mineralogical variations observed in the rocks are at a sub-pixel scale for the airborne analysis, we see an emerging spatial pattern in the distribution of spectral variations across the massif which might be prevailingly related to mineralogy. Although it is known from fieldwork that the Ronda peridotite massif exhibits mineralogical variations at local scale in the content of pyroxene, and at regional scale in different mineral facies, ranging from garnet-, to spinel- to plagioclase-lherzolites, no attempt has been done yet to produce a synoptic map relating the two scales of analysis. The present work is a first attempt to reach this objective, though a lot more work is still required. In particular, for the purpose of mineralogical interpretation, it is critical to relate the airborne observation to field work and laboratory spectra of Ronda rocks already obtained, with the use of image endmembers and associated reference endmembers. Also, the pretty rough linear mixing model used here is taken as a 'black-box' process which does not necessarily apply correctly to the physical situation at the sub-pixel level. One may think of using the ground-truth observations bearing on the sub-pixel statistical characteristics (texture, structural pattern, surface distribution and vegetation contribution (grass,..)) to produce a more advanced mixing model, physically appropriate to the geologic and environmental contexts.

Pinet, P. C.; Chabrillat, S.; Ceuleneer, G.

1993-01-01

126

Geological mapping of the Rainbow Massif, Mid-Atlantic Ridge, 36°14'N  

NASA Astrophysics Data System (ADS)

The Rainbow hydrothermal field at 36°14'N on the Mid-Atlantic Ridge is one of the few known sites hosted in ultramafic basement. The Rainbow Massif is located along the non-transform offset between the AMAR and South AMAR second-order ridge segments, and presents the characteristic dome morphology of oceanic core complexes, although no corrugated surface has been observed so far. One of the objectives of Cruises MOMAR DREAM (July 2007, R/V Pourquoi Pas ?; Aug-Sept 2008, R/V Atalante) was to study the petrological and structural context of the hydrothermal system at the scale of the Rainbow Massif. Our geological sampling complements previous ones achieved during Cruises FLORES (1997) and IRIS (2001), and consisted in dredge hauls, and submersible dives by manned submersible Nautile and ROV Victor. The tectonics of the Rainbow Massif is dominated by a N-S trending fault pattern on the western flank of the massif, and a series of SW-NW ridges on its northeastern side. The active hydrothermal site is located in the area were these two systems crosscut. The most abundant recovered rock type is peridotite (harzburgite and dunite) that presents a variety of serpentinization styles and intensity, and a variety of deformation styles (commonly undeformed, sometimes displaying ductile or brittle foliations). Serpentinites are frequently oxidized. Some peridotite samples have melt impregnation textures. Massive chromitite was recovered in one dredge haul. Variously evolved gabbroic rocks were collected as discrete samples or as centimeter to decimeter-thick dikes in peridotites. Basalts and fresh basaltic glass were also sampled in talus and sediments on the southwestern and northeastern flanks of the massif. Our sampling is consistent with the lithological variability encountered in oceanic core complexes along the Mid-Atlantic Ridge and Southwest Indian Ridge. The stockwork of the hydrothermal system has been sampled on the western side of the present-day hydrothermal field, along N-S trending normal fault scarps, and within the talus underneath. It is made of massive sulfides, strongly altered serpentinites, and breccias containing elements of iron sulfide/oxide impregnated serpentinites. * K. Bukas, V. Cueff Gauchard, L. Durand, F. Gaill, C. Konn, F. Lartaud, N. Le Bris, G. Musset, A. Nunes, J. Renard, V. Riou, A. Tasiemski, P. Torres, I. Vojdani, M. Zbinden

Ildefonse, B.; Fouquet, Y.; Hoisé, E.; Dyment, J.; Gente, P.; Thibaud, R.; Bissessur, D.; Yatheesh, V.; Momardream 2008 Scientific Party*, T.

2008-12-01

127

Neogene Uplift and Exhumation of Plutonic Bodies in the Beni Bou Ifrour Massif (Nador, northeastern Morocco)  

NASA Astrophysics Data System (ADS)

In Neogene times, the whole Mediterranean Sea was the center of an intense magmatic activity. This post-collisional magmatism produced a large amount of volcanic edifices through the Alpine belts, together with some intrusives. These plutonic bodies can be associated with skarn-type mineralization, well-known in Elba Island or Serifos Island (Cyclades), where they are generally exhumed by detachment faults. In Morocco, the plutons hosted by the Beni Bou Ifrour massif are connected to the biggest skarn-type iron concentrations of the country (production > 60 Mt, reserves ? 25 Mt). The purpose of this work is to explain the late uplift of this massif and subsequent exhumation of the intrusives. As a final product of the Africa-Eurasia plate convergence since ca. 70 Ma, the Rif Mountains constitute the westernmost segment of the Mediterranean Alpine belts. In the oriental part of this range, volcanic summits and Paleozoic to Mesozoic massifs outcrop in the surrounding Mio-Pliocene plains. The Beni Bou Ifrour massif, in the Nador province, consists in a dome-shaped folded Mesozoic series (Domerian to Barremian) affected by a slight epizonal regional metamorphism (ca. 14-12 Ma), dislocated by Neogene NE-SW faults and eventually sealed by upper Miocene transgressive sediments. The hosted intrusives (7.58 ± 0.03 Ma; Duggen et al., 2005) are the plutonic equivalents to the potassic calc-alkaline lavas (andesites mainly) from the surrounding "satellite" volcanic massifs. They turn out to stand in higher topographic position than the younger shoshonitic lavas of the neighboring Gourougou stratovolcano (6.12 ± 0.01 Ma; Duggen et al., 2005). Previous studies have attributed this uplift to the action of normal faults (pull-apart basins; Guillemin & Houzay, 1982), thrusting (Kerchaoui, 1985; 1995) or even of a caldeira resurgence (El Bakkali, 1995). To discriminate against those exhumation mechanisms, field work has been performed, coming along with new cross-sections to illustrate the geometry of the Beni Bou Ifrour massif. A paleomagnetism campaign was conducted, to determine if the plutonic intrusions have been tilted since their emplacement. Apatite fission tracks and 40Ar-39Ar dating allow us to estimate the exhumation age of the igneous bodies, and therefore add chronological constraints to the tectonic model. Geochemical study has also been performed on the magmatic rocks, and added to an extensive dataset (El Bakkali, 1995; Kerchaoui, 1995; Duggen et al., 2005). The existence of a magmatic chamber below the Beni Bou Ifrour dome will thus be discussed. Once established, the tectonic model of the Beni Bou Ifrour massif will help to precise the emplacement of the mineralized bodies and to integrate the iron-skarn metallogenesis within the structural evolution of the Rif orogenic segment.

Lebret, Noëmie; Jolivet, Laurent; Branquet, Yannick; Bourdier, Jean-Louis; Jolivet, Marc; Marcoux, Eric

2013-04-01

128

Structural Pattern, P-t Conditions and Timing of Alpine Deformation In The Argentera Massif (western Alps)  

NASA Astrophysics Data System (ADS)

The Argentera massif is located in the southern part of the Western Alps and belongs to the paleo-European basement. It forms the southernmost crystalline massif of the external domain. Hercynian high-grade metamorphic rocks and Carboniferous sedi- mentary basins were intruded at the end of the Hercynian orogen by the calc-alkaline Argentera granite. This massif experienced a polyphase deformation history, Hercy- nian and Alpine. The Alpine history is characterized by the development of a network of NNW-SSE trending transcurrent dextral ductile shear zones branching into E-W ductile thrust faults with a top to the south displacement. We interpret the uplift of the massif as the result of movements along these shear zones, relative to a sub-meridian compressional event. Our P-T condition estimates indicate a regional temperature at ca 350 rC for pressure at 0.35-0.4 GPa for Alpine metamorphism implying a mini- mum burial of 14 km for the Argentera massif. 39Ar-40Ar analyses of neo-crystallized phengites collected within a major E-W alpine crosscutting the late Hercynian Argen- tera granite shear zone (Frema Morte) yielded an age at ca 22.5 Ma. This is the first absolute age constraint of a late Alpine metamorphism in the external crystalline mas- sifs of the Western Alps. This metamorphism could result from overload imposed by thrusting of the internal nappes between 28 Ma and 22.5 Ma.

Corsini, M.; Caby, R.; Ruffet, G.

129

Amphibole genesis in pyroxenites from the Beni Bousera peridotite massif (Rif, Morocco): Evidence for two different metasomatic episodes  

NASA Astrophysics Data System (ADS)

The presence of variable amounts of amphibole ± phlogopite in a garnet websterite and a garnet clinopyroxenite from the Beni Bousera peridotite massif provides evidence for post-formation metasomatism. Textural observations associated with major- and trace-element mineral compositions allowed us to distinguish two metasomatic episodes, which occurred at different stages of the Beni Bousera massif evolution. The garnet websterite has recorded interaction with LREE-rich silicate melts before the uplift of the massif. Amphibole/clinopyroxene and amphibole/garnet trace-element ratios closely approach partition coefficient values, indicating that chemical equilibrium was attained between amphibole and pyroxenite matrix minerals. The geochemical signatures of the putative alkaline interacting melts are similar to those of recent basaltic magmas erupted in Morocco, suggesting a common peridotite mantle source. In contrast, amphibole from the garnet clinopyroxenite is in chemical disequilibrium with the pyroxenite matrix minerals. In this clinopyroxenite the crystallization of amphibole and plagioclase occurred at lower T (and P) conditions, most probably during the ascent of the Beni Bousera massif and its emplacement into the crust. The melt responsible for this later metasomatic episode was LREE-depleted and HREE-enriched, suggesting that it resulted from decompression melting of a garnet-bearing source (with garnet as a melting phase), similar to the garnet-bearing pyroxenites outcropping in the Beni Bousera massif.

El Atrassi, Fatima; Chazot, Gilles; Brunet, Fabrice; Chopin, Christian; Bouybaouene, Mohamed

2014-11-01

130

Datation U/Pb : âge Briovérien de la série d'Erquy (Massif armoricain, France)U/Pb dating: Brioverian age of the Erquy series (Armorican massif, France)  

NASA Astrophysics Data System (ADS)

New U/Pb analyses obtained with a high-resolution ion microprobe (SHRIMP) fix an age of 608 ±7 Ma for spilites of the Erquy series, in Cadomian rocks of the Armorican massif, France. This Neoproterozoic age re-integrates this unit into the Brioverian, the age it was initially assigned to. A Rb/Sr whole-rock dating in the 1970s had undermined the regional Cadomian model, by suggesting an Ordovician age for these rocks; this was apparently further supported by the discovery of organic remains, interpreted as Palaeozoic microfossils. The reassessment of this palaeontological attribution and the new isotope dating are a final confirmation of the age of this series.

Cocherie, Alain; Chantraine, Jean; Fanning, C. Mark; Dabard, Marie-Pierre; Paris, Florentin; Le Hérissé, Alain; Égal, Emmanuel

2001-10-01

131

Formation et signification paléo-environnementale des concentrations coquillières : exemples de l'Ordovicien de Sardaigne et du Dévonien du Massif armoricain  

Microsoft Academic Search

Formation and palaeoenvironmental significance of shellbeds: examples from the Ordovician of Sardinia and the Devonian of Armorican Massif. The study of shellbeds in the terrigenous platform deposits of the Upper Ordovician of Sardinia and Lower Devonian of the Armorican Massif, considering the taphonomic signatures and their repartition at the scale of a genetic sequence, allows us to distinguish two types

Arnaud Botquelen; Alfredo Loi; Rémy Gourvennec; Francesco Leone; Marie-Pierre Dabard

2004-01-01

132

First evidence of high-pressure metamorphism in the “Cover Series” of the southern Menderes Massif. Tectonic and metamorphic implications for the evolution of SW Turkey  

Microsoft Academic Search

The Menderes Massif occupies a large part of western Turkey. It is tectonically overlain by nappes of the Izmir–Ankara Suture Zone (including the Bornova Flysch Zone) on its northern flank, the Afyon Zone on its eastern border, and the Lycian Nappes on its southern flank. The discovery of magnesiocarpholite–kyanite assemblages in the Mesozoic ‘cover’ sequence of the southern Menderes Massif

Gaëtan Rimmelé; Roland Oberhänsli; Bruno Goffé; Laurent Jolivet; Osman Candan; Mete Çetinkaplan

2003-01-01

133

Metasomatic effects in the lithospheric mantle beneath the NE Bohemian Massif: a1 case study of Lutynia (SW Poland) peridotite xenoliths.2  

E-print Network

1 Metasomatic effects in the lithospheric mantle beneath the NE Bohemian Massif: a1 case study of Lithospheric Research, AlthanstraÃ?e 14, 10909 Wien, Austria, theodoros.ntaflos@univie.ac.at10 3 CNRS-UMR 5562 of a lithospheric rift system in53 the northern foreland of the Alps and uplift of Variscan basement blocks (Massif

Paris-Sud XI, Université de

134

The Death Penalty in the Northeast  

Microsoft Academic Search

This paper will provide an overview of the current status of capital punishment in the Northeastern United States. Of the nine states which comprise the Northeast (based on the U.S. Bureau of the Census designation), five have the death penalty (Connecticut, New Hampshire, New Jersey, New York, and Pennsylvania) and four-as of January 1, 1999—do not (Maine, Massachusetts, Rhode Island,

Charles S. Lanier

1999-01-01

135

Catalog of Apollo 17 rocks. Volume 1: Stations 2 and 3 (South Massif)  

NASA Technical Reports Server (NTRS)

The Catalog of Apollo 17 Rocks is a set of volumes that characterize each of 334 individually numbered rock samples (79 larger than 100 g) in the Apollo 17 collection, showing what each sample is and what is known about it. Unconsolidated regolith samples are not included. The catalog is intended to be used by both researchers requiring sample allocations and a broad audience interested in Apollo 17 rocks. The volumes are arranged geographically, with separate volumes for the South Massif and Light Mantle, the North Massif, and two volumes for the mare plains. Within each volume, the samples are arranged in numerical order, closely corresponding with the sample collection stations. The present volume, for the South Massif and Light Mantle, describes the 55 individual rock fragments collected at Stations two, two-A, three, and LRV-five. Some were chipped from boulders, others collected as individual rocks, some by raking, and a few by picking from the soil in the processing laboratory. Information on sample collection, petrography, chemistry, stable and radiogenic isotopes, rock surface characteristics, physical properties, and curatorial processing is summarized and referenced as far as it is known up to early 1992. The intention has been to be comprehensive: to include all published studies of any kind that provide information on the sample, as well as some unpublished information. References which are primarily bulk interpretations of existing data or mere lists of samples are not generally included. Foreign language journals were not scrutinized, but little data appears to have been published only in such journals. We have attempted to be consistent in format across all of the volumes, and have used a common reference list that appears in all volumes. Where possible, ages based on Sr and Ar isotopes have been recalculated using the 'new' decay constants recommended by Steiger and Jager; however, in many of the reproduced diagrams the ages correspond with the 'old' decay constants. In this volume, mg' or Mg' = atomic Mg/(Mg +Fe).

Ryder, Graham

1993-01-01

136

Metamorphic evolution of pelitic-semipelitic granulites in the Kon Tum massif (south-central Vietnam)  

NASA Astrophysics Data System (ADS)

Pelitic and semipelitic anatectic granulites form one of the major lithological units in Kan Nack complex of the Kon Tum massif (in south-central Vietnam), which comprises HT metamorphic and magmatic rocks including granulites and charnockites is classically regarded as the older part of the Gondwana-derived Indosinia terrain. Metamorphic evolution study of pelitic granulite, the most abundant among granulites exposed in this massif, facilitates to understand that tectonic setting take place during the Indosinian time. The paragenetic assemblages, mineral chemistry, thermobarometry and P-T evolution path of pelitic-semipelitic granulites from Kon Tum massif has been studied in detail. Petrographic feature demonstrates that the pelitic granulite experienced prograde history, from pregranulitic conditions in the amphibolite facies up to the peak granulitic assemblages. Successive prograde reactions led to the temperature-climax giving rise to assemblages with cordierite-hercynite and cordierite-hercynite-K-feldspar. Then, as attested by the mineralogic association occurring in cordieritic coronas, these rocks have been affected by retrograde conditions coeval with a decrease of the pressure. Thermobarometic results show that the highest temperature obtained by ksp/pl thermometry is 850 °C and the highest pressure obtained by GASP (Garnet Alumino-Silicate Plagioclase) is 7.8 kbar. The obtained clockwise P-T evolution path involving heating decompression, then nearly isothermal decompression and nearly isobar cooling conditions shows that high temperature-low pressure metamorphism of the studied pelitic anatectic granulites of Kan Nack complex occurred possibly in extensional setting during the Indosinian orogeny of 260-240 Ma in age.

Tích, Vu Van; Leyreloup, Andrey; Maluski, Henry; Lepvrier, Claude; Lo, Chinh-hua; V??ng, Nguy?n V.

2013-09-01

137

Receiver function search for a baby plume in the mantle transition zone beneath the Bohemian Massif  

NASA Astrophysics Data System (ADS)

The western Bohemian Massif is known for geodynamic phenomena such as earthquake swarms, CO2 dominated free gas emanations of upper-mantle origin, and Tertiary/ Quaternary volcanism. Among other explanations, a small-scale mantle plume has been suggested. We used data from the international passive seismic experiment BOHEMA (2001-2004) and of a previous seismic experiment to investigate the structure of the upper-mantle discontinuities at 410 km and 660 km depth (the '410' and the '660') beneath the Bohemian Massif with the P receiver function method. More than 4500 high-quality receiver function traces could be utilized. Two stacking techniques were used: stacking by station (common station method, CSM) and stacking by piercing points in the mantle transition zone (common conversion point method, CCM). Since the station spacing is very close, rays from different stations have similar piercing points in the mantle transition zone. Therefore CCM is sensitive in the transition zone and CSM is sensitive to the uppermost structure of the mantle. The CSM shows delayed conversion times from the 410 km discontinuity beneath the western Bohemia earthquake region, which indicate a slow uppermost mantle. When stacking our data by CCM, we observe thickening of the transition zone towards the Alpine foreland, which agrees with tomographic results by Piromallo and Morelli. The thickness of the mantle transition zone beneath the western Bohemian Massif is normal, with a faint hint to thinning in the northern part. Our conclusion is that a plume-like structure may exist in the upper mantle below the western Bohemia earthquake region, but with no or only weak imprint on the 410 km discontinuity.

Heuer, Barbara; Geissler, Wolfram H.; Kind, Rainer

2011-11-01

138

Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, Mid-Atlantic Ridge 30°N  

NASA Astrophysics Data System (ADS)

Expeditions 304 and 305 of the Integrated Ocean Drilling Program cored and logged a 1.4 km section of the domal core of Atlantis Massif. Postdrilling research results summarized here constrain the structure and lithology of the Central Dome of this oceanic core complex. The dominantly gabbroic sequence recovered contrasts with predrilling predictions; application of the ground truth in subsequent geophysical processing has produced self-consistent models for the Central Dome. The presence of many thin interfingered petrologic units indicates that the intrusions forming the domal core were emplaced over a minimum of 100-220 kyr, and not as a single magma pulse. Isotopic and mineralogical alteration is intense in the upper 100 m but decreases in intensity with depth. Below 800 m, alteration is restricted to narrow zones surrounding faults, veins, igneous contacts, and to an interval of locally intense serpentinization in olivine-rich troctolite. Hydration of the lithosphere occurred over the complete range of temperature conditions from granulite to zeolite facies, but was predominantly in the amphibolite and greenschist range. Deformation of the sequence was remarkably localized, despite paleomagnetic indications that the dome has undergone at least 45° rotation, presumably during unroofing via detachment faulting. Both the deformation pattern and the lithology contrast with what is known from seafloor studies on the adjacent Southern Ridge of the massif. There, the detachment capping the domal core deformed a 100 m thick zone and serpentinized peridotite comprises ˜70% of recovered samples. We develop a working model of the evolution of Atlantis Massif over the past 2 Myr, outlining several stages that could explain the observed similarities and differences between the Central Dome and the Southern Ridge.

Blackman, D. K.; Ildefonse, B.; John, B. E.; Ohara, Y.; Miller, D. J.; Abe, N.; Abratis, M.; Andal, E. S.; Andreani, M.; Awaji, S.; Beard, J. S.; Brunelli, D.; Charney, A. B.; Christie, D. M.; Collins, J.; Delacour, A. G.; Delius, H.; Drouin, M.; Einaudi, F.; EscartíN, J.; Frost, B. R.; Früh-Green, G.; Fryer, P. B.; Gee, J. S.; Godard, M.; Grimes, C. B.; Halfpenny, A.; Hansen, H.-E.; Harris, A. C.; Tamura, A.; Hayman, N. W.; Hellebrand, E.; Hirose, T.; Hirth, J. G.; Ishimaru, S.; Johnson, K. T. M.; Karner, G. D.; Linek, M.; MacLeod, C. J.; Maeda, J.; Mason, O. U.; McCaig, A. M.; Michibayashi, K.; Morris, A.; Nakagawa, T.; Nozaka, T.; Rosner, M.; Searle, R. C.; Suhr, G.; Tominaga, M.; von der Handt, A.; Yamasaki, T.; Zhao, X.

2011-07-01

139

The dyke swarms of the Amanay Massif, Fuerteventura, Canary Islands (Spain)  

NASA Astrophysics Data System (ADS)

The sheeted dyke swarms of the Amanay Massif in Fuerteventura exhibit variable trends but generally strike N45°E (main) and N110° (subsidiary). On the basis of petrographic studies, the dykes are classified as ankaramitic basalts, trachybasalts (hawaiites) and lamprophyres (camptonites). This compositional variability is attributed to different extents of partial melting of the mantle and to differences in the degree of fractional crystallization. We present a detailed account of field characteristics, mineralogy and petrography of the sheeted dyke complex that intruded the sedimentary sequence, plutonic and submarine volcanic formations.

Ahijado, A.; Casillas, R.; Hernández-Pacheco, A.

2001-04-01

140

Stable isotope geochemistry and phase equilibria of coesite-bearing whiteschists, Dora Maira Massif, western Alps  

Microsoft Academic Search

Peak metamorphic temperatures for the coesite-pyrope-bearing whiteschists from the Dora Maira Massif, western Alps were determined with oxygen isotope thermometry. The d18O(smow) values of the quartz (after coesite) (d18O=8.1 to 8.6‰, n=6), phengite (6.2 to 6.4‰, n=3), kyanite (6.1‰, n=2), garnet (5.5 to 5.8‰, n=9), ellenbergerite (6.3‰, n=1) and rutile (3.3 to 3.6‰, n=3) reflect isotopic equilibrium. Temperature estimates based

Z. D. Sharp; E. J. Essene; J. C. Hunziker

1993-01-01

141

New species from the Galoka and Kalabenono massifs: two unknown and severely threatened mountainous areas in NW Madagascar  

PubMed Central

The Galoka mountain chain, comprising principally the Galoka and Kalabenono massifs, situated at the northern edge of the Sambirano Region in NW Madagascar is an area that was virtually unknown botanically. It was visited three times between 2005 and 2007 as part of a floristic inventory. Both massifs contain the last remaining primary forests in the Galoka chain, which extends parallel to the coastline from South of Ambilobe to North of Ambanja. Several new species have been discovered amongst the collections, eight of which are described here. PMID:21857767

Callmander, Martin W.; Rakotovao, Charles; Razafitsalama, Jeremi; Phillipson, Peter B.; Buerki, Sven; Hong-Wa, Cynthia; Rakotoarivelo, Nivo; Andriambololonera, Sylvie; Koopman, Margaret M.; Johnson, David M.; Deroin, Thierry; Ravoahangy, Andriamandranto; Solo, Serge; Labat, Jean-Noel; Lowry, Porter P.

2011-01-01

142

Utilization of digital LANDSAT imagery for the study of granitoid bodies in Rondonia: Case example of the Pedra Branca massif  

NASA Technical Reports Server (NTRS)

Analysis of digital multispectral MSS-LANDSAT images enhanced through computer techniques and enlarged to a video scale of 1:100.000, show the main geological and structura features of the Pedra Branca granitic massif in Rondonia. These are not observed in aerial photographs or adar images. Field work shows that LANDSAT photogeological units correspond to different facies of granitic rocks in the Pedra Branca massif. Even under the particular characteristics of Amazonia (Tropical Forest, deep weathering, and Quaternary sedimentary covers), an adequate utilization of orbital remote sensing images can be important tools for the orientation of field works.

Parada, N. D. J. (principal investigator); Almeidafilho, R.; Payolla, B. L.; Depinho, O. G.; Bettencourt, J. S.

1984-01-01

143

The 1897 Shillong earthquake, northeast India: A new perspective on its seismotectonics and earthquake history  

NASA Astrophysics Data System (ADS)

The 1897 Shillong earthquake, northeast India is considered to be one of the largest in modern history. Oldham's memoir on this event widely considered as a classic treatise opened new vistas in observational seismology; many questions on the associated faulting mechanisms however remain unresolved. While most previous studies have suggested that the earthquake originated on a gentle north-dipping thrust that is considered to be associated with the Himalayan tectonics, a recent geodetic model by Bilham and England (2001) invokes a steep, south-dipping reverse fault, close to the northern topographic edge of the Shillong Plateau. This model, derived mostly from extant triangulation records, deviates from the conventional understanding of the faulting mechanism of this earthquake. Here, we interpret the available database on seismotectonics of the region and coseismic deformation associated with the 1897 earthquake, together with independent geomorphologic observations, to further understand the nature of faulting. Our interpretation of the morphologic features and coseismic level changes in the Brahmaputra valley, well logs, Bouguer gravity and earthquake data are consistent with a major, steep south-dipping fault, but it spatially conforms to the extreme northern margin of the Shillong massif, which occasionally outcrops on the northern bank of the Brahmaputra River. Our analysis of historical, archaeological and geological data implies a possible 1000-year-interval between the 1897 earthquake and its predecessor and we identify the northern boundary fault (named here as the Brahmaputra fault) as historically more active among other potential faults in the region. The overall tectonic scenario also indicates the critical role of the Brahmaputra in the progressive denudation of the northern plateau margin compared to its southern part (Dauki fault) and its impact on the seismotectonic processes associated with plateau uplift.

Rajendran, C.; Rajendran, K.

2003-12-01

144

1. OVERVIEW OF MAIN HOSPITAL, NORTHEAST CORNER. Presidio of ...  

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

1. OVERVIEW OF MAIN HOSPITAL, NORTHEAST CORNER. - Presidio of San Francisco, Letterman General Hospital, Building No. 27, Letterman Hospital Complex, Edie Road, San Francisco, San Francisco County, CA

145

5. Hospital Point, northeast bulkhead (typical), view to northwest ...  

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

5. Hospital Point, northeast bulkhead (typical), view to northwest - Portsmouth Naval Hospital, Bounded by Elizabeth River, Crawford Street, Portsmouth General Hospital, Parkview Avenue, & Scotts Creek, Portsmouth, Portsmouth, VA

146

4. Hospital Point, Saunders Monument, view to northeast Portsmouth ...  

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

4. Hospital Point, Saunders Monument, view to northeast - Portsmouth Naval Hospital, Bounded by Elizabeth River, Crawford Street, Portsmouth General Hospital, Parkview Avenue, & Scotts Creek, Portsmouth, Portsmouth, VA

147

Looking Northeast Along Hallway between Pellet Plant and Oxide Building, ...  

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

Looking Northeast Along Hallway between Pellet Plant and Oxide Building, including Virgin Hopper Bins - Hematite Fuel Fabrication Facility, Pellet Plant, 3300 State Road P, Festus, Jefferson County, MO

148

Looking northeast at interior of Machine Shop (Bldg. 134) ...  

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

Looking northeast at interior of Machine Shop (Bldg. 134) - Atchison, Topeka, Santa Fe Railroad, Albuquerque Shops, Machine Shop No. 2, 908 Second Street, Southwest, Albuquerque, Bernalillo County, NM

149

Looking northeast across transfer table pit at Boiler Shop (Bldg. ...  

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

Looking northeast across transfer table pit at Boiler Shop (Bldg. 152) - Atchison, Topeka, Santa Fe Railroad, Albuquerque Shops, Boiler Shop, 908 Second Street, Southwest, Albuquerque, Bernalillo County, NM

150

OVERHILLS GOLF COURSE LOOKING NORTHEAST FROM SPECTATOR SHELTER BACK UP ...  

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

OVERHILLS GOLF COURSE LOOKING NORTHEAST FROM SPECTATOR SHELTER BACK UP FAIRWAY #1 - Overhills, Fort Bragg Military Reservation, Approximately 15 miles NW of Fayetteville, Overhills, Harnett County, NC

151

Northwest side, northeast part, looking southeast, note fire alarm box ...  

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

Northwest side, northeast part, looking southeast, note fire alarm box at right - Mare Island Naval Shipyard, Guard House & Barracks, Railroad Avenue near Eighteenth Street, Vallejo, Solano County, CA

152

VIEW OF NOS. 217 AND 219 WASHINGTON AVENUE LOOKING NORTHEAST, ...  

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

VIEW OF NOS. 217 AND 219 WASHINGTON AVENUE LOOKING NORTHEAST, SHOWING WEST FACADES - Apollo Iron & Steel Works, Company Housing, West of Washington & Lincoln Avenues, Vandergrift, Westmoreland County, PA

153

Elevation of grove looking northeast toward Washington Monument 1910 ...  

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

Elevation of grove looking northeast toward Washington Monument - 1910 Japanese Flowering Cherry Trees , East Potomac Golf Course, East Potomac Park, Hains Point vicinity, Washington, District of Columbia, DC

154

The age of Earth's largest volcano: Tamu Massif on Shatsky Rise (northwest Pacific Ocean)  

NASA Astrophysics Data System (ADS)

This study presents laser step-heating 40Ar/39Ar age determinations of basaltic lava samples from Tamu Massif, the oldest and largest edifice of the submarine Shatsky Rise in the northwest Pacific and Earth's proposed largest volcano. The rocks were recovered during Integrated Ocean Drilling Program Expedition 324, which cored 160 m into the igneous basement near the summit of Tamu Massif. The analyzed lavas cover all three major stratigraphic groups penetrated at this site and confirm a Late Jurassic/Early Cretaceous age for the onset of Shatsky Rise volcanism. Lavas analyzed from the lower and middle section of the hole yield plateau ages between 144.4 ± 1.0 and 143.1 ± 3.3 Ma with overlapping analytical errors (2?), whereas a sample from the uppermost lava group produced a significantly younger age of 133.9 ± 2.3 Ma suggesting a late or rejuvenated phase of volcanism. The new geochronological data infer minimum (average) melt production rates of 0.63-0.84 km3/a over a time interval of 3-4 million years consistent with the presence of a mantle plume.

Geldmacher, Jörg; van den Bogaard, Paul; Heydolph, Ken; Hoernle, Kaj

2014-11-01

155

Occurrence of an unknown Atlantic eruption in the Chaîne des Puys volcanic field (Massif Central, France)  

NASA Astrophysics Data System (ADS)

A volcanic ash layer, called MF1, was recently identified in Holocene sediments from the Gourgon and Molhiac peat bogs (Monts du Forez, French Massif Central). This ash layer consists of colorless shards with a heterogeneous trachytic to rhyolitic composition. The trace elements analyzed by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) attest to a local origin. Radiocarbon dating of peat samples taken within and below the ash layer indicates the best age at 6339 ± 61 cal yr BP, i.e. an age contemporaneous with the volcanic activity of Montchal, Montcineyre and Pavin volcanoes from the Chaîne des Puys volcanic field. These volcanoes are characterized by basaltic and trachytic products, thus the rhyolitic composition of MF1 tephra suggests that it is likely originated from an unknown eruption. These results again confirm the interest of studying the distal volcanic ash fallouts in order to establish or specify records of past eruptions of volcanic fields. Identification of this new tephra layer also provides an additional tephrochronological marker for Eastern French Massif Central.

Jouannic, G.; Walter-Simonnet, A. V.; Bossuet, G.; Cubizolle, H.; Boivin, P.; Devidal, J. L.; Oberlin, C.

2014-08-01

156

The age of Earth's largest volcano: Tamu Massif on Shatsky Rise (northwest Pacific Ocean)  

NASA Astrophysics Data System (ADS)

This study presents laser step-heating 40Ar/39Ar age determinations of basaltic lava samples from Tamu Massif, the oldest and largest edifice of the submarine Shatsky Rise in the northwest Pacific and Earth's proposed largest volcano. The rocks were recovered during Integrated Ocean Drilling Program Expedition 324, which cored 160 m into the igneous basement near the summit of Tamu Massif. The analyzed lavas cover all three major stratigraphic groups penetrated at this site and confirm a Late Jurassic/Early Cretaceous age for the onset of Shatsky Rise volcanism. Lavas analyzed from the lower and middle section of the hole yield plateau ages between 144.4 ± 1.0 and 143.1 ± 3.3 Ma with overlapping analytical errors (2?), whereas a sample from the uppermost lava group produced a significantly younger age of 133.9 ± 2.3 Ma suggesting a late or rejuvenated phase of volcanism. The new geochronological data infer minimum (average) melt production rates of 0.63-0.84 km3/a over a time interval of 3-4 million years consistent with the presence of a mantle plume.

Geldmacher, Jörg; van den Bogaard, Paul; Heydolph, Ken; Hoernle, Kaj

2014-09-01

157

Cross-gradient joint inversion of gravity and aeromagnetic data in mineralized northern Menderes Massif, Turkey  

NASA Astrophysics Data System (ADS)

The Menderes Massif in western Turkey formed by the stacking of tectonic units during Cretaceous-Eocene shortening that were modified by late Oligocene to recent crustal extension, accompanied by significant crustal melting. The interaction of regional deformation with crustal melting and the emplacement of plutons and volcanic complexes during both contraction and extension across structures related to the Tethyan suture has resulted in epithermal and porphyry type gold mineralization that has taken place mainly in the northern and western parts of the Menderes Massif, and in ongoing structurally controlled hydrothermal activity across its entire extent. The northern Menderes Massif contains granitic intrusions, ophiolitic klippen, volcanics, metamorphic basement and Cenozoic sediments. Some of the plutons, such as the Egrigöz granite, have intruded into the footwall of an extensional shear zone, defining at least part of the granite-intruded basement as a Miocene metamorphic core complex with ophiolitic rocks of the Vardar-Izmir-Ankara zone in the hanging wall plate. Here we present results of cross-gradient joint inversions of gravity and magnetic data in the northern Menderes Massif along a series of cross-sections oriented N-S, E-W and ESE-WNW. The inversions were carried out to better define the subsurface geology and aid targeting hydrothermal mineralization. The results suggest that metamorphic rocks with low magnetization underlie wide areas in the centre and east of the study area. Dense rocks with low to intermediate magnetization often correlate with oceanic affinity rocks that extend to great depth in the west and southeast of the study area, but occur as thin sheets in the centre. Regions of low to intermediate magnetization and low density are mostly encountered with the upper 5 km of the crust and are often spatially associated with felsic volcanic complexes and sedimentary rocks. High magnetization and low density are generally associated with granitoid intrusions, and mainly occur in the west, north and southeast of the study area, where they locally extend to the base of the cross section at 10 km depth. The inversions allow tracing the tectonic boundary between the Menderes Massif and overlying accreted subduction complex rocks: crustal provinces with oceanic affinity occur predominantly in the west and the southeast of the sections. The Bornova flysch, and the Tavsanli and Afyon zones occur in thin sheets in the centre / east and make up the entire studied depth of the crust in the west. The boundary is a steep structure in the west, and a shallowly dipping structure in the centre of the area, where the Menderes basement is at shallow levels. Where the structure is shallow, the boundary is likely to be an extensional detachment fault. Metamorphic rocks, but more so ophiolitic rocks in the OC terrain are potential reductants for magmatic and hydrothermal fluids sourced from, or in equilibrium with felsic-intermediate volcanics and intrusions. The key control to mineralisation may be with which type of wall rock Miocene intrusions and volcanic complexes have interacted. Given that the subduction complexes consist to a large extent of ultramafic and meta-carbonate rocks, it is not surprising that most mineral occurrences are in oceanic affinity crust, which is more prospective because of (i) its potential to reduce magmatic fluids, (ii) its mechanical inhomogeneity which translates into a better potential to dilate under stress thus providing pathways to fluids and melts, and (iii) its position as the 'hanging wall trap' unit in the steep western zone and the shallow detachments in the central study area.

Gessner, Klaus; Gallardo, Luis; Wedin, Francis; Sener, Kerim

2014-05-01

158

40 CFR 81.216 - Northeast Indiana Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Northeast Indiana Intrastate Air Quality Control Region...Control Regions § 81.216 Northeast Indiana Intrastate Air Quality Control Region. The Northeast Indiana Intrastate Air Quality Control...

2013-07-01

159

40 CFR 81.216 - Northeast Indiana Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Northeast Indiana Intrastate Air Quality Control Region...Control Regions § 81.216 Northeast Indiana Intrastate Air Quality Control Region. The Northeast Indiana Intrastate Air Quality Control...

2012-07-01

160

40 CFR 81.216 - Northeast Indiana Intrastate Air Quality Control Region.  

...2014-07-01 2014-07-01 false Northeast Indiana Intrastate Air Quality Control Region...Control Regions § 81.216 Northeast Indiana Intrastate Air Quality Control Region. The Northeast Indiana Intrastate Air Quality Control...

2014-07-01

161

The Vercors and Chartreuse Massifs at the leading edge of the alpine thrust belt: Tetonic history and petroleum assessment  

SciTech Connect

The Vercors and Chartreuse Massifs are located at the leading edge of the Western Alps Thrust Belt. They developed in late Miocene-Pliocene times above a major decollement hosted in late Triassic evaporites and/or Liassic marls. The uplift of both massifs led to the oblique and partial inversion of the previous Mesozoic margin of the Southeastern Basin, the thickest onshore sedimentary basin in France. Both massifs are unexplored. The regional geology of eastern France and the results of ten wells located in the near foreland suggest that source rocks are present in late Paleozoic and late Liassic strata, and that fractured sandstones and/or limestones of Triassic/Jurassic age could act as reservoirs. A nonexclusive seismic survey has been shot in 1991 by CGG allowing the first well constrained balanced sections to be drawn across both massifs. They have been used inturn to model the forward kinematics of thrust propagation, and the source rock maturation history, using the {open_quotes}Thrustpack{close_quotes} software developed by IFP and partners.

Deville, E.; Mascle, A.; Philippe, Y. [Institut Francais du Petrole, Rueil-Malmaison (France)] [and others

1995-08-01

162

Montane vegetation of the Mt. Field massif, Tasmania: a test of some hypotheses about properties of community patterns  

Microsoft Academic Search

direct gradient analysis was applied to the montane vegetation of the Mt. Field massif, Tasmania. Ecological response surface were constructed, describing the relationship between the mean % cover of each of 100 vascular plant species and two major environmental complex-gradients represented by soil drainage and altitude. The hypotheses tested were that: (1) the ecological responses of species are generally of

Peter R. Minchin

1989-01-01

163

Age and emplacement of late-Variscan granites of the western Bohemian Massif with main focus on the Hauzenberg granitoids  

E-print Network

shape for all Carboniferous plutonic rocks in the Moldanubian Zone of the Bohemian Massif, Behrmann 30 August 2007 Abstract The Variscan Hauzenberg pluton consists of granite and granodiorite that intruded late- to postkinematically into HT- metamorphic rocks of the Moldanubian unit at the southwestern

Siebel, Wolfgang

164

Late Mesozoic compressional to extensional tectonics in the Yiwulshan massif, NE China and its bearing on the evolution of  

E-print Network

. The structural evolution of this massif brings new insights for the understanding of the Mesozoic plutonic, and D4). The Cretaceous extensional structures, such as syntectonic plutons bounded by ductile normal and South China Blocks (SCB). The presence of UHP metamorphic rocks attest to a very deep subduction

Boyer, Edmond

165

LAiguille du Midi (massif du Mont Blanc) : un site remarquable pour ltude du permafrost des parois daltitude  

E-print Network

1 LAiguille du Midi (massif du Mont Blanc) : un site remarquable pour létude du permafrost des permafrost P. Deline (1), V. Coviello (1), E. Cremonese (2), S. Gruber (3), M. Krautblatter (4), S. Jaillet, Università di Torino, Italy (paolo.pogliotti@gmail.com) R�SUM� Le permafrost et ses modifications dans les

Rabatel, Antoine

166

Massification, Bureaucratization and Questing for "World-Class" Status: Higher Education in China since the Mid-1990s  

ERIC Educational Resources Information Center

Purpose: This article aims to review the latest developments of the higher education sector in China since the mid-1990s by focusing on the expansion of university education. Design/methodology/approach: It is argued that while massification of higher education is an important indication of the progress in China's higher education system, the…

Ngok, Kinglun

2008-01-01

167

The Toa Baja Drilling Project, Puerto Rico: Scientific drilling into a non-volcanic island arc massif  

SciTech Connect

The Toa Baja Drilling Project was a broad, interdisciplinary experiment to document the in situ geology and geophysics of a non-volcanic island arc massif. This overview provides a brief summary of oil exploration on Puerto Rico that lead up to the present investigation, and summarizes some of the problems addressed by drilling.

Larue, D.K. (Univ. of Puerto Rico, Mayaguez (Puerto Rico))

1991-03-01

168

Effects of fire frequency on plant communities and landscape pattern in the Massif des Aspres (southern France)  

Microsoft Academic Search

Fire frequency can affect pattern and diversity in plant communities and landscapes. We had the opportunity to study changes due to recurring wildfires on the same sites over a period of 50 years in the “Massif des Aspres” (southern France). The study was carried out in areas occupied byQuercus suber andQ. ilex series. A comparison of historical and cartographical documents

Louis Trabaudl; Jean-François Galtié

1996-01-01

169

NASA Northeast Regional Technology Transfer Center  

NASA Technical Reports Server (NTRS)

This report is a summary of the primary activities and metrics for the NASA Northeast Regional Technology Transfer Center, operated by the Center for Technology Commercialization, Inc. (CTC). This report covers the contract period January 1, 2000 - March 31, 2001. This report includes a summary of the overall CTC Metrics, a summary of the Major Outreach Events, an overview of the NASA Business Outreach Program, a summary of the Activities and Results of the Technology into the Zone program, and a Summary of the Major Activities and Initiatives performed by CTC in supporting this contract. Between January 1, 2000 and March 31, 2001, CTC has facilitated 10 license agreements, established 35 partnerships, provided assistance 517 times to companies, and performed 593 outreach activities including participation in 57 outreach events. CTC also assisted Goddard in executing a successful 'Technology into the Zone' program.' CTC is pleased to have performed this contract, and looks forward to continue providing their specialized services in support of the new 5 year RTTC Contract for the Northeast region.

Dunn, James P.

2001-01-01

170

Credit BG. Northeast and northwest facades of Building 4496 (Security ...  

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

Credit BG. Northeast and northwest facades of Building 4496 (Security Facility) as seen when looking south (178°) from entrance to secured area. The Control Tower (Building 4500) appears in background. The Security Facility is part of the secured Building 4505 complex - Edwards Air Force Base, North Base, Security Facility, Northeast of A Street, Boron, Kern County, CA

171

5. Northeast rear and northwest end, building no. 529. View ...  

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

5. Northeast rear and northwest end, building no. 529. View to south. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

172

3. Northeast rear and northwest end, building no. 528. View ...  

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

3. Northeast rear and northwest end, building no. 528. View to south. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

173

2. Southeast end and northeast rear, building no. 528. View ...  

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

2. Southeast end and northeast rear, building no. 528. View to west. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

174

16. View of northeast corner of East Ward Street and ...  

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

16. View of northeast corner of East Ward Street and North McDonald Avenue, facing northeast. - Gaskin Avenue Neighborhood, Bounded by Dart Street to east, CSX Railroad to south, Pearl & Madison Avenues to west, & Wilson & Gordon Streets to north, Douglas, Coffee County, GA

175

42. INTERIOR VIEW LOOKING NORTHEAST AT THE STAMP BATTERIES. ONE ...  

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

42. INTERIOR VIEW LOOKING NORTHEAST AT THE STAMP BATTERIES. ONE OF THE DRIVE WHEELS IS ON THE FOREGROUND RIGHT WITH AN EXTANT DRIVE BELT. THE CAM SHAFT EXTENDS TO THE BACKGROUND CENTER. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

176

3. NORTHEAST REAR, SHOWING CONCRETE ENCASEMENT FOR STAIRWAY LEADING FROM ...  

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

3. NORTHEAST REAR, SHOWING CONCRETE ENCASEMENT FOR STAIRWAY LEADING FROM INSTRUMENT ROOM TO UNDERGROUND FIRING CONTROL ROOM. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Firing Control Building, Test Area 1-100, northeast end of Test Area 1-100 Road, Boron, Kern County, CA

177

Residential system designs for the northeast and southwest  

Microsoft Academic Search

The development of residential photovoltaic power systems as part of the United States Department of Energy photovoltaic program will begin in FY-80. Prototype residential systems for heating, cooling and electric power will be built and evaluated at regional Residential Experiment Stations (RES's). The first RES locations will be in the Northeast and Southwest. The most appropriate system designs for Northeast

1980-01-01

178

Changing Waves and Storms in the Northeast Atlantic?  

Microsoft Academic Search

The European project WASA (Waves and Storms in the North Atlantic) has been set up to verify or disprove hypotheses of a worsening storm and wave climate in the northeast Atlantic and its adjacent seas in the present century. Its main conclusion is that the storm and wave climate in most of the northeast Atlantic and in the North Sea

1998-01-01

179

72. NORTHEAST SIDE OF NITROGEN EXCHANGERS IN FOREGROUND; FUEL APRON ...  

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

72. NORTHEAST SIDE OF NITROGEN EXCHANGERS IN FOREGROUND; FUEL APRON IN BACKGROUND. NORTHEAST CORNER OF WEST CAMERA TOWER ALSO IN BACKGROUND. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

180

NORTHEAST LOON STUDY WORKING GROUP PARTNERSHIP TO ASSESS ENVIRONMENTAL RISK  

EPA Science Inventory

The Northeast Loon Study Working Group (NELSWG) was formed in 1994 to proactively identify threats to one of the Northeast's most popular waterbirds, the common loon, Gavia immer. Seventeen institutions have come together to identify strategy, coordinate the work load, and share ...

181

17. Interior detail, pilaster on transverse wall at the northeast ...  

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

17. Interior detail, pilaster on transverse wall at the northeast end of the Machine Shop, Roundhouse Machine Shop Extension, Southern Pacific Railroad Carlin Shops, view to northeast (90mm lens). Note the offset top of the pilaster, a feature common to all interior transverse wall pilasters. - Southern Pacific Railroad, Carlin Shops, Roundhouse Machine Shop Extension, Foot of Sixth Street, Carlin, Elko County, NV

182

New England Fishery Management Plans 1. Northeast Multispecies  

E-print Network

#12; New England Fishery Management Plans 1. Northeast Multispecies 2. Atlantic Sea Scallops the MAFMC) 7. Deep-sea Red Crab 8. Northeast Skate Complex 9. Atlantic Salmon Key New England Commercial Species Commercially-important species and species groups in New England include: quahog clam, cod

183

Pyroclastic chronology of the Sancy stratovolcano (Mont-Dore, French Massif Central): New high-precision 40Ar/39Ar constraints  

NASA Astrophysics Data System (ADS)

The Sancy (16 km2) is the youngest of the two stratovolcanoes that constitute the Mont-Dore Massif (Massif Central, France). The restricted number of high precision radio-isotopic ages currently limits our knowledge of the pyroclastic chronology of this edifice which is the source of many tephra layers detected in middle Pleistocene sequences in southeast Europe. To improve our knowledge of the building phases of this stratovolcano, we collected thirteen pyroclastic units covering the entire proximal record. We present 40Ar/39Ar single grain laser dating performed in the facility hosted at the LSCE (Gif-sur-Yvette, France). The 40Ar/39Ar ages range from 1101 ± 11 ka to 392 ± 7 ka (1? external). Four pyroclastic cycles lasting on average 100 ka were identified (C. I to C. IV). C. I corresponds to the earlier explosive phase between 1101 ka and 1000 ka and starts about 100 ka earlier than previously thought. The second pyroclastic cycle (C. II) is the main pyroclastic episode spanning from 818 to 685 ka. This cycle is constituted of a minimum of 8 major pyroclastic eruptions and includes a major event that corresponds to a large plinian eruption at 719 ± 10 ka (1? external) and recorded as a 1.4 m thick layer 60 km south-east of the Sancy volcano. The link between this large eruption and formation of a caldera stays however, hypothetical. The third pyroclastic cycle (C. III) found in the northeastern part of the Sancy (Mont-Dore valley) spanned from 642 to 537 ka. Finally, the youngest pyroclastic cycle (C. IV) starts at 392 ka and probably ends around 280 ka. The age versus geographic location of each pyroclastic cycle indicates three preferential directions of channeling of the pyroclastic events and/or collapse of the volcanic edifice: northwest to west (C. I), southeast (C. II) and finally north to northeast (C. III and IV). The new high precision 40Ar/39Ar age for the Queureuilh bas pyroclastic unit (642 ± 9 ka) is identical within error with the U/Pb age obtained by Cocherie et al. (2009) [Geochimica et Cosmochimica Acta, 73, 1095-1108] and suggests a short residence time of the magma in a shallow, short-lived, small magmatic chamber. Finally, the source of the t21d tephra layer found in the Piànico Séllere varved sequence (Northern Italy) is not the Rivaux pumice flow as proposed by Brauer et al. (2007) [Journal of Quaternary Science 22, 85-96] and neither one of the C. II pyroclastic units as suggested by Roulleau et al. (2009) [Quaternary International 204, 31-43]. Accordingly, the source for the t21d layer has yet to be found at Sancy or elsewhere.

Nomade, Sébastien; Scaillet, Stéphane; Pastre, Jean-François; Nehlig, Pierre

2012-05-01

184

Variscan sutures and exhumation of high- to ultrahigh-pressure metamorphic rocks in the Bohemian Massif  

NASA Astrophysics Data System (ADS)

The Bohemian Massif is the largest segment of European Variscan belt, where high-grade crystalline basement units are interleaved by numerous blocks and boudins of HP-UHPM rocks of oceanic and mantle origin. The medium- to high-temperature eclogites, garnet peridotites and pyroxenites occur within granulites, granulite gneisses and migmatites. UHP conditions are estimated for garnet peridotites and associated garnet clinopyroxenites and eclogites. The clinopyroxenite forms layers and the eclogite occurs as lenses or boudins in garnet peridotites. Prograde PT path and pressure near to coesite stability field is confirmed also for some granulites that host HT eclogite and garnet peridotite. Medium- to low-temperature eclogites are present in the gneisses and amphibolites. All these rocks occur in two tectonostratigraphic domains (the Saxothuringian and Moldanubian zones), which surround and underplate the Teplá Barrandian block from northwest and southeast, respectively. The Teplá Barrandian block is situated in the central part of the Bohemian Massif and it is formed by low- to medium grade metasediments, which are free from eclogites and garnet peridotites. The HP-UHPM rocks from the Saxothuringian and Moldanubian zones show similar lithology, PT conditions and ages of their protoliths and metamorphism. Ophiolites, some showing eclogite facies conditions, are also present in these two zones. The Saxothuringian Zone in addition contains blueschist facies rocks that form a discontinuous belt along the western and northern border of the Teplá Barrandian block. Due to strongly greenschist facies overprint, the blueschist facies rocks are only locally preserved. The presence and regional extent of HP-UHPM rocks in the Saxothuringian and Moldanubian zones and their relation to possible suture zones is the subject of long discussion. Recent results of petrological research show that HP-UHPM rocks primarily covered a large area and their present extent is the result of medium- to low-pressure reequilibrium during their exhumation and subsequent collisional processes. In addition to ophiolites, blueschists and low-temperature eclogites, knowledge of geotectonic position of the source material for UHPM rocks are needed to localise the suture zones. Eclogites and peridotites show signatures of both depleted oceanic and lithospheric mantle that were dragged down along the subduction zone. A combination of available data on lithology and ages, with the results of petrological study stated above, as well as of solid phase inclusions in minerals is used to reconstruct possible model for Variscan subduction that was responsible for formation and exhumation of HP-UHPM rocks in the Bohemian Massif.

Faryad, S. W.; Kachlík, V.; Jedlicka, R.; Klápová, H.

2012-04-01

185

Seafloor acoustic imagery surrounding the Rainbow massif, Mid-Atlantic Ridge 36°N  

NASA Astrophysics Data System (ADS)

The MARINER (Mid-Atlantic Ridge INtegrated Experiments at Rainbow) seismic and geophysical mapping experiment was carried out in April-May 2013 and was designed to examine the relationship between tectonic rifting, heat/melt supply, and oceanic core complex formation at a non-transform offset (NTO) of the Mid-Atlantic Ridge (36°N) the site of the ultramafic-hosted Rainbow hydrothermal system. One component of this experiment was dense acoustic multibeam backscatter and bathymetry data collection. We present acoustic imagery of the seafloor extending across two segments of the Mid-Atlantic Ridge separated by the Rainbow NTO massif. The acoustic imagery provides a broad view of the character of the ridge system, emphasizing the strong variability of seafloor morphology, tectonics, and lava emplacement and reveals the general tectono-magmatic setting of the Rainbow massif. The amplitude data were collected via a hull-mounted multi-beam sonar system (Kongsberg EM-122) aboard the R/V Marcus G. Langseth. The multi-fold, multi-directional coverage of the amplitude data allows for a compilation of all data into a common grid, as is usually done for depth data. Corrections for amplitude loss and grazing angle, in combination with multiple data coverage averages out noisy data, local slope dependence, and removes along-track artifacts that tend to be endemic to sonar images. The benefit is a complete sonar image for the area that can be examined with little distortion due to artifacts, and whose features can be interpreted as being principally derived from the intrinsic reflectivity of the seafloor rather than from look-direction and local seafloor slope. The main features of the image include: (1) newer seafloor within the axial valleys with some discernible individual lava flows; (2) large and small fault scarps and possible fissure systems; (3) sediment-filled basins; (4) terrains composed nearly entirely of small volcanic cones; (5) volcanic ridges; (6) regions of shallow topography exhibiting low sedimentation. The Rainbow massif itself consists of a mixture of high and low backscatter amplitudes, reflective of a complex tectonic and sedimentation history.

Dunn, R. A.; Canales, J.; Sohn, R. A.; Kakone, E.

2013-12-01

186

Geothermobarometry of basaltic glasses from the Tamu Massif, Shatsky Rise oceanic plateau  

NASA Astrophysics Data System (ADS)

We present the results of a petrological study of core samples from Tamu Massif (Site U1347), recovered during the Shatsky Rise Integrated Ocean Drilling Program (IODP) Expedition 324. The basaltic glasses from Site U1347 are evolved tholeiitic basalts containing 5.2-6.8 wt% MgO, and are principally located within the compositional field of mid-ocean ridge basalts (MORBs) but they have systematically higher FeO, lower Al2O3, SiO2, and Na2O concentrations, and the CaO/Al2O3 ratios are among the highest known for MORBs. In this sense, glasses from Site U1347 more closely resemble basaltic magmas from the Ontong Java Plateau (OJP), although they still have lower SiO2 concentrations. In contrast to MORB and similar to OJP, our fractionation corrected values of Na2O and CaO/Al2O3 indicate more than 20% of partial melting of the mantle during the generation of the parental magmas of Tamu Massif. The water contents in the glasses, determined by midinfrared Fourier transform infrared (FTIR) spectroscopy, are MORB-like, and vary between 0.18 and 0.6 wt% H2O. The calculated pressure (P)-temperature (T) conditions at which the natural glasses represent cotectic olivine-plagioclase-clinopyroxene compositions range from 0.1 to 240 MPa and 1100 to 1150°C reflecting magma storage at shallow depth. The variation of the glass compositions and the modeled P-T conditions in correlation with the relative ages indicate that there were at least two different magmatic cycles characterized by variations in eruptive styles (massive flows or pillow lavas), chemical compositions, volatile contents, and preeruptive P-T conditions. Each magmatic cycle represents the progressive differentiation in course of polybaric crystallization after the injection of a more primitive magma batch. Magma crystallization and eruption episodes are followed by magmatic inactivity reflected in the core sequence by a sedimentary layer. Our data for Tamu Massif demonstrate that, similar to Ontong Java ocean Plateau, the crystallization beneath Shatsky Rise occurs at different crustal levels.

Husen, Anika; Almeev, Renat R.; Holtz, François; Koepke, Jürgen; Sano, Takashi; Mengel, Kurt

2013-10-01

187

Rock avalanches on a glacier and morainic complex in Haut Val Ferret (Mont Blanc Massif, Italy)  

NASA Astrophysics Data System (ADS)

Deposits in upper Val Ferret (Mont Blanc Massif, Italy) have been attributed to glacier advances and to a rock avalanche of 12 September AD 1717. We review evidence for the timing and mode of emplacement of the deposit, and present a new geomorphic interpretation and relative and absolute dating to show that the AD 1717 deposit is less extensive than previously thought. The landslide was deflected along one side of the valley floor, preserving older slope and morainic sediments along the other side. An earlier rock avalanche onto the Triolet Glacier occurred before AD 1000. The deposits of these landslides partly cover older moraine several kilometres downstream from the present glacier front, and have affected the glacier regimen and construction of its moraines. This study highlights the geomorphic impact of rock avalanches in glacierized high mountains.

Deline, Philip; Kirkbride, Martin P.

2009-01-01

188

Permeability Structure Beneath the Lost City Hydrothermal Field, Atlantis Massif Oceanic Core Complex  

NASA Astrophysics Data System (ADS)

The Lost City Hydrothermal Field (LCHF) has been venting low temperature (50-90 °C) alkaline fluids for at least 120,000 years. It is located close to the crest of the transform wall of the Atlantis Massif (30 °N, MAR), and is underlain by detachment fault schists and serpentinized peridotites with minor gabbro. Only 5km to the north, IODP Hole 1309D sampled 1400 m of gabbroic rocks. An almost linear thermal gradient of ~100 °C/km has recently been measured in the Hole during IODP expedition 340T, a unique piece of data in young ocean crust. The combination of a steep conductive gradient in proximity to a long lived hydrothermal system places severe constraints on the permeability structure of the Massif. We have used Comsol Multiphysics to create the first 2-D topographic model of the LCHF using a N-S profile through the vent site and Hole 1309D. Initial models use a constant basal heat flow (0.2 W/m2) which produces a steady state conductive gradient of about 85 °C/km using temperature-dependent conductivity and heat capacity. We include a low permeability basal layer and in some models a lower permeability zone beneath the IODP Hole with a boundary dipping steeply southwards, corresponding to a boundary between gabbro and serpentinite inferred from seismic tomography. We have used two top boundary conditions; (1) a mixed boundary condition in which dT/dz =0 if flow is upwards, and T=0 if flow is downwards, and (2) T=0. The first boundary condition is normally used in hydrothermal modelling but produces serious vent temperature artifacts at low upward flow rates since heat cannot escape conductively. The second boundary condition produces more stable models and has been shown by Wilcock (1998) to reproduce the form of hydrothermal circulation accurately. However vent temperatures can only be approximated due to the upper thermal boundary layer produced. With a constant permeability in the upper part of the model, transient high temperature vents form near the highest point of the topography but migrate with time across the location of the borehole, where a conductive gradient is never established. Conditions in the Massif are much better reproduced by models with a lower permeability zone beneath the IODP borehole. This stabilises the vent location near the crest of the Massif, and creates a conductive gradient in the borehole which typically increases gradually with time up to about 400000 years. Transient high temperature venting (with unstable flow at permeabilities <10-15 m2) are succeeded by stable venting with gradually declining vent temperatures matching Lost City temperatures over significant time intervals. In all our models, seafloor topography strongly influences circulation with influx of fluid in the transform valley (where microbes could potentially live several km below the seafloor) and discharge in higher topography. The requirement of a particular permeability structure means that long-term vent sites similar to Lost City may be a relatively uncommon occurrence in the world's oceans.

McCaig, A. M.; Titarenko, S.

2012-12-01

189

Permafrost detection in the headwalls of receding glaciers at the Dachstein Massif, Northern Calcareous Alps, Austria  

NASA Astrophysics Data System (ADS)

The Northern Calcareous Alps cover a large area of the Austrian Alps forming a boundary zone between the Alpine Foreland to the north and the crystalline Central Alps to the south. Generally, climate in this area is more maritime compared to the mountain ranges further south. Few small glaciers are to be found mostly on north-facing slopes. The Northern Calcareous Alps reach maximum elevations of about 3000 m asl. Some of highest summits are to be found are located in the Dachstein Massif reaching 2995 m asl (47° 28' 32? N, 13° 36' 23? E). Occurrence, thickness and thermal regime of permafrost at this mountain massif are widely unknown and knowledge is based on simulations only. In contrast, the glaciation changes at this mountain massif (e.g. Schladminger and Hallstätter glaciers) have been well documented for decades. Within the framework of the research project ROCKING ALPS - dealing with frost weathering and rockfall in alpine regions - knowledge of permafrost distribution in the headwalls surrounding the receding glaciers is substantial to understand rock decay. For this reason, several techniques have been applied in order to detect bedrock permafrost. During the winter of 2012 22 i-buttons (temperature sensors) were attached to rock walls with different orientations but at similar elevations (2600-2700 m asl). Most of these sites were later covered by an insulating winter snow cover therefore allowing the calculation of the base temperature of the winter snow cover (BTS). These BTS data have been used as a first indicator of permafrost presence. In selected rock walls of several mountains in the massif - Koppenkarstein (2863 m asl), Dirndln (2829 m asl) and Gjaidstein (2794 m asl) - additional 2D-geoelectric surveys (five ERT profiles with a length of 100 m and 2 m electrode spacing) were measured in summer 2013. The high resistivities (> 50.000 ohm.m) at about 1.5 m depth and deeper strongly suggest permafrost existence inside the bedrock at all sites. Interestingly, bedrock permafrost was also detected at an immediate glacier margin which has been ice-free for 2-3 decades at maximum. Possibly the glacier at this site was too thin to have a sufficient insulating effect on the rock and hence was cold-based in this position. Alternatively permafrost aggradation occurred rapidly in the few last decades at this site. A new and innovative method in geomorphology and permafrost research is the use of infrared photography. By using this method the gaps between the punctual temperature sensors and the profile lines of the geoelectric measurements can get closed. By using infrared photography it was possible to visualize patterns and amplitudes of the diurnal variations of the surface temperature. First results showed a faster and deeper cooling of the permafrost areas compared to non-permafrost rocks, which is in accordance with the BTS and ERT data.

Rode, Matthias; Gitschthaler, Christoph; Schnepfleitner, Harald; Kellerer-Pirklbauer, Andreas; Sass, Oliver

2014-05-01

190

Physical-Chemical Factors Affecting the Low Quality of Natural Water in the Khibiny Massif  

NASA Astrophysics Data System (ADS)

One peculiarity of the Khibiny Massif is its spatial location. Rising over 1000 m above the surrounding hilly land and thus obstructing the passage of air masses, it promotes condensation and accumulation of surface and underground water. Annual precipitation here amounts to 600-700 mm in the valleys and up to 1600 mm on mountainous plateaus. Using this water for drinking and household purposes is problematic due to excess Al and F concentrations and high pH values. Now it is known that in its profile, the Massif is represented by three hydrogeological subzones: the upper (aerated), medium and lower ones. The upper subzone spreads throughout the Massif and is affected by the local drainage network and climatic conditions. The medium subzone is permanently saturated with underground water flowing horizontally to sites of discharge at the level of local river valleys and lakes. The fissure-vein water in the lower subzone is confined to tectonic fractures and faults in the so far underexplored, deeper parts of the Massif. Being abundant, this water ascends under high pressure. At places, water has been observed spurting from as deep as 700 m, and even 960 m. In the latter case, the temperature of ascending water was higher than 18 centigrade (Hydrogeology of the USSR, V. 27, 1971). This work was undertaken to reveal the nature of the low quality of water in the Khibiny by using physical-chemical modeling (software package Selector, Chudnenko, 2010). Processes of surface and underground water formation in the Khibiny were examined within a physical-chemical model (PCM) of the "water-rock-atmosphere-hydrogen" system. In a multi-vessel model used, each vessel represented a geochemical level of the process interpreted as spatiotemporal data - ? (Karpov, 1981). The flow reactor consisted of 4 tanks. In the first tank, water of the Kuniok River (1000 L) interacted with atmosphere and an organic substance. The resulting solution proceeded to tanks 2-4 containing with underlying rocks (100g of each) to interact with them following the preset process level, the water-rock ratio being ? = 1.0; 0.8; 0.6; 0.2 at temperatures (5, 5, 3, 3 centigrade) and pressures (1, 2, 2, 3 bar), respectively. The model had been reliably verified in the aeration zone monitored in the course of the years 2001 and 2010. Analysis of the chemical composition of deeper water-bearing strata has required to increase the intensity of the water-rock interactions in tank 3 (from 0.2 to 0) and tank 4 (from 0 to -0.2) and simultaneously increase the temperature: (5, 10, 10 centigrade) in the third and (10, 18, 25 centigrade) in the fourth. At the value of ?= -0.2 in the temperature range of 18-25 centigrade, the component contents in tank 4 were observed to change (mg/l): Al (8.10-4 -1.10-3), HCO3- (67-69), Na (25-26,9), Cl (6-6,38), F(0.522-0.882) giving rise to new mineral phases, which agreed with the monitoring data of 1996-1997. The pH values in this case were close to 9. Our findings suggest that factors contributing to changing redox conditions, responsible for the formation of soda and abrupt increment of HCO3-, fluorine and aluminum concentrations, are time and temperature.

Mazukhina, Svetlana; Masloboev, Vladimir; Chudnenko, Konstantin; Maksimova, Viktoriia; Belkina, Natalia

2014-05-01

191

Mineral compositions of plutonic rocks from the Lewis Hills massif, Bay of Islands ophiolite  

NASA Technical Reports Server (NTRS)

Mineral compositions of residual and cumulate rocks from the Lewis Hills massif of the Bay of Islands ophiolite complex are reported and interpreted in the context of magnetic processes involved in the geochemical evolution of spatially associated diabase dikes. The mineral compositions reflect greater degrees of partial melting than most abyssal peridotites do and appear to represent the most depleted end of abyssal peridotite compositions. Subsolidus equilibration between Cr-Al spinal and olivine generally has occurred at temperatures of 700 to 900 C. The spinel variations agree with the overall fractionation of basaltic magmas producing spinels with progressively lower Cr numbers. The compositions of clinopyroxenes suggest that the fractionation of two different magma series produced the various cumulate rocks.

Smith, Susan E.; Elthon, Don

1988-01-01

192

Petrogenetic significance of ocellar camptonite dykes in the Ditr?u Alkaline Massif, Romania  

NASA Astrophysics Data System (ADS)

Camptonite dykes intrude the rift-related Mesozoic igneous body of the Ditr?u Alkaline Massif, Eastern Carpathians, Romania. We present and discuss mineral chemical data, major and trace elements, and the Nd isotopic compositions of the dykes in order to define their nature and origin. The dykes are classified as the clinopyroxene-bearing (camptonite-I) and clinopyroxene-free (camptonite-II) varieties. Camptonite-I consists of aluminian-ferroan diopside phenocrysts accompanied by kaersutite, subordinate Ti-rich annite, albite to oligoclase and abundant calcite-albite ocelli. Camptonite-II comprises K-rich hastingsite to magnesiohastingsite, Ti-rich annite, albite to andesine, abundant accessory titanite and apatite, and silicate ocelli filled mainly with plagioclase (An4-34). Age-corrected 143Nd/144Nd ratios vary from 0.51258 to 0.51269. The high ?Nd values of + 4.0 to + 6.1 which are consistent with intra-plate composition, together with light rare earth element (LREE), large ion lithophile element (LILE) and high field strength element (HFSE) enrichment in the camptonites is ascribed to the formation of small melt batches of a metasomatised sub-lithospheric mantle source. The presence of an asthenospheric ‘high ?' ocean island basalt (HIMU-OIB)-type mantle component in the source region has also been revealed. A 1-4% degree of partial melting of an enriched garnet lherzolite mantle source containing pargasitic amphibole followed by fractionation is inferred to have been involved in the generation of the camptonites. They are deduced to be parental melts to the Ditr?u Alkaline Massif.

Batki, Anikó; Pál-Molnár, Elemér; Dobosi, Gábor; Skelton, Alasdair

2014-07-01

193

Homogeneous /sup 18/O enrichment of the Marcy Anorthosite Massif, Adirondack Mountains, New York  

SciTech Connect

The Marcy Anorthosite Massif in the Adirondack Mountains, New York, is a composite intrusion that was metamorphosed to granulite facies at approx. 1.1 Ga. The massif is dominantly anorthosite but ranges from anorthosite (1-10% mafics) to oxide-rich pyroxenite layers (up to 98% mafics). In the St Regis Quad (SRQ) systematic variations in the percentage of mafics (POM) roughly parallel the foliation and increase toward the contacts (Davis, 1971). In 47 SRQ samples studied the POM varies from 2-25%; garnet ranges from 0-11%, pyroxene from <1-16% and oxides from <1-8%. Percent phenocrysts varies between 1-80. The Port Kent-Westport Unit (PKW) and an associated hybrid unit show significantly greater textural variability. The POM Varies from 1-50%; garnet ranges from 0-18%, pyroxene from 0-15%, oxides from 0-3% and phenocrysts vary from 0-80%. A total of 28 unaltered plagioclase phenocrysts have been analyzed for delta/sup 18/O: in 13 SRQ samples delta/sup 18/O = 9.0-9.8 (x=9.4. sigma=0.2) and in 15 samples from the PKW and hybrid units values of delta/sup 18/O=8.5-10.5 (x=9.5.sigma0.5). No correlations exist between the modal parameters and delta/sup 18/O. The results from SRQ demonstrate an extreme homogeneity suggesting for the first time a pristine magmatic character which is supported by the virtual absence of metasedimentary inclusions. This contrasts with PKW where inclusions are common and delta/sup 18/O values are more heterogeneous. Further analyses will evaluate the possibility of an anomalous source region as a cause of the /sup 18/O enrichment in the anorthosite.

Morrison, J.; Valley, J.W.

1985-01-01

194

The cooling history and the depth of detachment faulting at the Atlantis Massif oceanic core complex  

NASA Astrophysics Data System (ADS)

Oceanic core complexes (OCCs) are domal exposures of oceanic crust and mantle interpreted to be denuded to the seafloor by large slip oceanic detachment faults. We combine previously reported U-Pb zircon crystallization ages with (U-Th)/He zircon thermochronometry and multicomponent magnetic remanence data to determine the cooling history of the footwall to the Atlantis Massif OCC (30°N, MAR) and help establish cooling rates, as well as depths of detachment faulting and gabbro emplacement. We present nine new (U-Th)/He zircon ages for samples from IODP Hole U1309D ranging from 40 to 1415 m below seafloor. These data paired with U-Pb zircon ages and magnetic remanence data constrain cooling rates of gabbroic rocks from the upper 800 m of the central dome at Atlantis Massif as 2895 (+1276/-1162) °C Myr-1 (from ˜780°C to ˜250°C); the lower 600 m of the borehole cooled more slowly at mean rates of ˜500 (+125/-102) °C Myr-1(from ˜780°C to present-day temperatures). Rocks from the uppermost part of the hole also reveal a brief period of slow cooling at rates of ˜300°C Myr-1, possibly due to hydrothermal circulation to ˜4 km depth through the detachment fault zone. Assuming a fault slip rate of 20 mm/yr (from U-Pb zircon ages of surface samples) and a rolling hinge model for the sub-surface fault geometry, we predict that the 780°C isotherm lies at ˜7 km below the axial valley floor, likely corresponding both to the depth at which the semi-brittle detachment fault roots and the probable upper limit of significant gabbro emplacement.

Schoolmeesters, Nicole; Cheadle, Michael J.; John, Barbara E.; Reiners, Peter W.; Gee, Jeffrey; Grimes, Craig B.

2012-10-01

195

Petrology of low pressure granulites from the Lichtenberg and Sauwald zone, Bohemian Massif, Upper Austria  

NASA Astrophysics Data System (ADS)

The Bohemian Massif in Upper Austria exposes low pressure granulite facies rocks which belong to the Moldanubian Unit and were metamorphosed during the last stage of the Variscan orogeny. The investigated Lichtenberg (northwest of Linz) and Sauwald (south of the river Danube) zones comprise mainly paragneisses. However, most of these rocks underwent high degrees of melting forming meta- and diatexites ("Perlgneise"). Al-rich metapelites, which are suitable for precise PT and PT-path determinations, can be found in various localities throughout the whole unit. In this study samples from the cliffs along the Danube valley between Linz and Wilhering and from Werndorf (close to Schärding) were sampled and investigated petrographically in detail. Since garnets are rare and usually consumed by cordierite, a sample with unusual large garnets was of special interest. A chemical zoning profile across the diameter of the c. 1cm large garnet showed an elevated Ca-plateau (Xgrs=0.06) in the core which decreased discontinuously towards the rim to Xgrs=0.02. Almandine, pyrope and spessartine components do not show any pronounced zoning pattern. Most of the smaller garnet grains in other samples are also homogeneous in composition with a slight Xalm increase and Xprp decrease at the rims, typical for retrograde diffusional zoning. The migmatic gneisses and cordierite-garnet-sillimanite-granulites as well as mafic granulites were used for geothermobarometric calculations. Metamorphic conditions of around 770°C to 850°C and 0.5-0.6 GPa could be obtained, which are similar to the values obtained by Tropper et al. (2006). P. Tropper I. Deibl F. Finger R. Kaindl (2006). P-T-t evolution of spinel-cordierite-garnet gneisses from the Sauwald Zone (Southern Bohemian Massif, Upper Austria): is there evidence for two independent late-Variscan low-P / high-T events in the Moldanubian Unit? Int J Earth Sci (Geol Rundsch) (2006) 95: 1019-1037.

Sorger, Dominik; Daghighi, Donia; Simic, Katica; Hauzenberger, Christoph; Linner, Manfred; Fritz, Harald

2013-04-01

196

Granulite-facies rocks in the Whatley Mill gneiss, Pine Mountain basement massif, Eastern Alabama  

SciTech Connect

The Pine Mountain basement massif is a granulite terrane exposed in a tectonic window through the Inner Piedmont of western Georgia and eastern Alabama. Investigations of the westernmost extent of the massif, the Whatley Mill Gneiss, have revealed four distinct lithologies: (1) an augen gneiss, the type lithology; (2) mylonite that develops in the shear zones cutting the unit; (3) a phaneritic rock showing weak to no foliation; (4) enclaves of biotite gneiss within the weakly-foliated rock. Additionally, the weakly-foliated rock comprises two distinct phases which are in sharp contact along curved and undulating boundaries: phase 1 is a coarser-grained rock; phase 2 is a finer-grained rock of the same mineralogy as phase 1 except it contains rare hypersthene. This first recorded observation of hypersthene unequivocally confirms the granulite-facies origin of the unit. Major and trace element compositions of the phase 1 rock are identical to those of the augen gneiss. The phase 2 rock, has a distinct composition with higher SiO[sub 2] and lower incompatible trace elements than the phase 1 rock. The enclaves display a range in major elements but higher incompatible elements than the other lithologies. Geochemical and petrologic relationships leads one to interpret: (1) the weakly-foliated rock retains many of its primary igneous features including its two phases and enclaves; (2) the two phases of the weakly-foliated rock arose as a result of injection of one magma (phase 2) into a cooler, crystal mush solidifying from another magma (phase 1); (3) the enclaves represent either autoliths of xenoliths; (4) the augen gneiss arose by isochemical deformation of the phase 1 rock.

Daniell, N.; Salpas, P.A. (Auburn Univ., AL (United States). Dept. of Geology)

1993-03-01

197

Polyphase structural evolution in the northeastern segment of the North Patagonian Massif (southern Argentina)  

NASA Astrophysics Data System (ADS)

Structural analyses in the northeastern segment of the North Patagonian Massif (southern Argentina) show that the simply deformed and metamorphosed phyllitic succession of the Late Precambrian-Cambrian El Jagüelito Formation has been intruded by Ordovician granitoids that are not ductilely deformed. The unconformable cover of the Silurian-Lower Devonian Sierra Grande Formation suggests that the Early Paleozoic Famatinian deformation of western Argentina did not affect this sector of the North Patagonian Massif. The ˜NW-SE compression of this succession led to the formation of open fold structures combined with high-angle reverse and sinistral strike-slip faults. Deformation interfered with the cooling of the Laguna Medina granitoids and is assigned here to the Late Paleozoic interval (probably Permian). A comparable mechanism is assumed for the metamorphism in the Sierras Australes fold-and-thrust belt north of Patagonia. The ˜NE-SW compression in the area west of Mina Gonzalito led to the formation of mylonites in the Peñas Blancas and La Laguna granites. It is suggested that ductile deformation is Permian in age and took place along important shear horizons. On a regional scale, it is comparable to that of the Cerro de Los Viejos granite (La Pampa Province) and the Sierras Australes fold-and-thrust belt (Buenos Aires Province) north of the inferred suture between Patagonia and Gondwana South America. This suggests that, on both sides of the boundary, intense compression took place during the same Gondwanide period and that extra-Andean Patagonia collided with Gondwana South America. The deformation in the Sierra Grande area is interpreted as a second-stage event during the Gondwanide deformational and magmatic history.

von Gosen, W.

2002-12-01

198

Subcontinental rift initiation and ocean-continent transitional setting of the Dinarides and Vardar zone: Evidence from the Krivaja-Konjuh Massif, Bosnia and Herzegovina  

NASA Astrophysics Data System (ADS)

The Dinaride and Vardar zone ophiolite belts extend from the south-eastern margins of the Alps to the Albanian and Greek ophiolites. Detailed sampling of the Krivaja-Konjuh massif, one of the largest massifs in the Dinaride belt, reveals fertile compositions and an extensive record of deformation at spinel peridotite facies conditions. High Na2O clinopyroxene and spinel-orthopyroxene symplectites after garnet indicate a relatively high pressure, subcontinental origin of the southern and western part of Krivaja, similar to orogenic massifs such as Lherz, Ronda and the Eastern Central Alpine peridotites. Clinopyroxene and spinel compositions from Konjuh show similarities with fertile abyssal peridotite. In the central parts of the massif the spinel lherzolites contain locally abundant patches of plagioclase, indicating impregnation by melt. The migrating melt was orthopyroxene undersaturated, locally converting the peridotites to massive olivine-rich troctolites. Massive gabbros and more evolved gabbro veins cross-cutting peridotites indicate continued melt production at depth. Overall we infer that the massif represents the onset of rifting and early stages of formation of a new ocean basin. In the south of Krivaja very localized chromitite occurrences indicate that much more depleted melts with supra-subduction affinity traversed the massif that have no genetic relationship with the peridotites. This indicates that volcanics with supra-subduction affinity at the margins of the Krivaja-Konjuh massif record separate processes during closure of the ocean basin. Comparison with published compositional data from other Balkan massifs shows that the range of compositions within the Krivaja-Konjuh massif is similar to the compositional range of the western massifs of the Dinarides. The compositions of the Balkan massifs show a west to east gradient, ranging from subcontinental on the western side of the Dinarides to depleted mid-ocean ridge/arc compositions in the Vardar zone in the east. This is consistent with the hypothesis that both ophiolite belts originate in a single ocean, rather than from two separate basins. A distinct decrease in fertility occurs in the south of the Dinarides towards the Albanian ophiolites with supra-subduction affinity.

Faul, Ulrich H.; Garapi?, Gordana; Lugovi?, Boško

2014-08-01

199

Geology of the Atlantis Massif (Mid-Atlantic Ridge, 30°N): Implications for the evolution of an ultramafic oceanic core complex  

Microsoft Academic Search

The oceanic core complex comprising Atlantis Massif was formed within the past 1.5-2 Myr at the intersection of the Mid-Atlantic Ridge, 30°N, and the Atlantis Transform Fault. The corrugated, striated central dome prominently displays morphologic and geophysical characteristics representative of an ultramafic core complex exposed via long-lived detachment faulting. Sparse volcanic features on the massif's central dome indicate that minor

Donna K. Blackman; Jeffrey A. Karson; Deborah S. Kelley; Johnson R. Cann; Gretchen L. Früh-Green; Jeffrey S. Gee; Stephen D. Hurst; Barbara E. John; Jennifer Morgan; Scott L. Nooner; D. Kent Ross; Timothy J. Schroeder; Elizabeth A. Williams

2002-01-01

200

Geology of the Atlantis Massif (Mid-Atlantic Ridge, 30°?N): Implications for the evolution of an ultramafic oceanic core complex  

Microsoft Academic Search

The oceanic core complex comprising Atlantis Massif was formed within the past 1.5–2 Myr at the intersection of the Mid-Atlantic Ridge, 30°?N, and the Atlantis Transform Fault. The corrugated, striated central dome prominently displays morphologic and geophysical characteristics representative of an ultramafic core complex exposed via long-lived detachment faulting. Sparse volcanic features on the massif's central dome indicate that minor

Donna K. Blackman; Jeffrey A. Karson; Deborah S. Kelley; Johnson R. Cann; Gretchen L. Früh-Green; Jeffrey S. Gee; Stephen D. Hurst; Barbara E. John; Jennifer Morgan; Scott L. Nooner; D. Kent Ross; Timothy J. Schroeder; Elizabeth A. Williams

2002-01-01

201

Sulfur and selenium systematics of the subcontinental lithospheric mantle: Inferences from the Massif Central xenolith suite (France)  

NASA Astrophysics Data System (ADS)

Selenium has been analyzed in addition to S in 58 spinel peridotite xenoliths collected in Cenozoic alkali basalts from the Massif Central (France). The S concentration range now available for this suite, calculated from 123 samples, is the largest ever reported for alkali basalt-hosted xenoliths (<3-592 ppm). Likewise, the Se concentrations range between 0.2 and 67 ppb. No partial melting signature can be identified from the S and Se systematic. Half of the analyzed xenoliths have lost S during supergene weathering. By contrast, neither surficial alteration, nor loss of chalcophile elements during eruption can explain the regional-scale variations of S and Se concentrations. A first group of lherzolite xenoliths sampled in Southern Massif Central, from volcanic centers older and spatially unrelated to the Massif Central plume that triggered the Cenozoic volcanism, contains between 20 and 250 ppm S (with occasional S concentrations up to 592 ppm) and 12-67 ppb Se. It is clear that the highest S values, originally interpreted as representing S abundances in the primitive mantle, were in fact enriched by metasomatism. Highly variable S and Se contents (<5-360 ppm; 9-52 ppb) have also been observed in peridotite xenoliths collected in the Northern Massif Central, from volcanic centers mostly older than the plume. Like Group I xenoliths, these Group II xenoliths were strongly metasomatized by volatile-rich carbonated/silicated melts which precipitated Cu-rich sulfides. A third group of xenoliths from Plio-Quaternary basalts spatially related to the Massif Central Plume are uniformly poor in S (10-60 ppm) and Se (9-29 ppb). In this Group III, poikiloblastic textured xenoliths have lost most of their S and Se budget by peridotite-melt interactions at high melt/rock ratios. Taken as a whole, the Massif Central xenolith suite provides further evidence for strong heterogeneities in the S and Se budget of the sub-continental lithospheric mantle. However, the few LREE-depleted fertile lherzolites that escaped strong metasomatic alterations suggest a S- and Se-depleted primitive mantle reservoir compared to currently accepted primitive mantle estimates.

Lorand, Jean-Pierre; Alard, Olivier; Luguet, Ambre; Keays, Reid R.

2003-11-01

202

Early Holocene M~6 explosive eruption from Plosky volcanic massif (Kamchatka) and its tephra as a link between terrestrial and marine paleoenvironmental records  

NASA Astrophysics Data System (ADS)

We report tephrochronological and geochemical data on early Holocene activity from Plosky volcanic massif in the Kliuchevskoi volcanic group, Kamchatka Peninsula. Explosive activity of this volcano lasted for ~1.5 kyr, produced a series of widely dispersed tephra layers, and was followed by profuse low-viscosity lava flows. This eruptive episode started a major reorganization of the volcanic structures in the western part of the Kliuchevskoi volcanic group. An explosive eruption from Plosky (M~6), previously unstudied, produced tephra (coded PL2) of a volume of 10-12 km3 (11-13 Gt), being one of the largest Holocene explosive eruptions in Kamchatka. Characteristic diagnostic features of the PL2 tephra are predominantly vitric sponge-shaped fragments with rare phenocrysts and microlites of plagioclase, olivine and pyroxenes, medium- to high-K basaltic andesitic bulk composition, high-K, high-Al and high-P trachyandesitic glass composition with SiO2 = 57.5-59.5 wt%, K2O = 2.3-2.7 wt%, Al2O3 = 15.8-16.5 wt%, and P2O5 = 0.5-0.7 wt%. Other diagnostic features include a typical subduction-related pattern of incompatible elements, high concentrations of all REE (>10× mantle values), moderate enrichment in LREE (La/Yb ~ 5.3), and non-fractionated mantle-like pattern of LILE. Geochemical fingerprinting of the PL2 tephra with the help of EMP and LA-ICP-MS analyses allowed us to map its occurrence in terrestrial sections across Kamchatka and to identify this layer in Bering Sea sediment cores at a distance of >600 km from the source. New high-precision 14C dates suggest that the PL2 eruption occurred ~10,200 cal BP, which makes it a valuable isochrone for early Holocene climate fluctuations and permits direct links between terrestrial and marine paleoenvironmental records. The terrestrial and marine 14C dates related to the PL2 tephra have allowed us to estimate an early Holocene reservoir age for the western Bering Sea at 1,410 ± 64 14C years. Another important tephra from the early Holocene eruptive episode of Plosky volcano, coded PL1, was dated at 11,650 cal BP. This marker is the oldest geochemically characterized and dated tephra marker layer in Kamchatka to date and is an important local marker for the Younger Dryas—early Holocene transition. One more tephra from Plosky, coded PL3, can be used as a marker northeast of the source at a distance of ~110 km.

Ponomareva, Vera; Portnyagin, Maxim; Derkachev, Alexander; Pendea, I. Florin; Bourgeois, Joanne; Reimer, Paula J.; Garbe-Schönberg, Dieter; Krasheninnikov, Stepan; Nürnberg, Dirk

2013-09-01

203

Remote Connection of the Northeast Asian Summer Rainfall Variation Revealed by a Newly Defined Monsoon Index  

Microsoft Academic Search

A new northeast Asian summer monsoon index is introduced to investigate the characteristics of the northeast Asian summer rainfall variation, including Korea, Japan, and northeast China, and its possible connection to the tropical and midlatitude circulations. The summer precipitation over northeast Asia is separated into two components associated with tropical forcing and midlatitude dynamics using this monsoon index. The connection

Eun-Jeong Lee; Jong-Ghap Jhun; Chung-Kyu Park

2005-01-01

204

A MASSIF Effort To Determine The Mass-Luminosity Relation for Stars of Various Ages, Metallicities, and Evolution States  

NASA Technical Reports Server (NTRS)

The MASSIF (Masses and Stellar Systems with Interferometry) Team will use SIM to investigate the mass content of the Galaxy - from huge stars to barely glimmering brown dwarfs, and from hot white dwarfs to exotic black holes. We will target various samples of the Galactic population to determine and relate the fundamental characteristics of mass, luminosity, age, composition, and multiplicity - attributes that together yield an extensive understanding of the stars. Our samples will include distant clusters that span a factor of 5000 in age, and commonplace stars and substellar objects that lurk near the Sun. The principal goals of the MASSIF Key Project are to (1) define the mass-luminosity relation for main sequence stars in five fundamental clusters so that effects of age and metallicity can be mapped (Trapezium, TW Hydrae, Pleiades, Hyades, and M67), and (2) determine accurate masses for representative examples of nearly every type of star, stellar descendant or brown dwarf in the Galaxy.

Henry, Todd J.; Beedict, G. Fritz; Gies, Douglas R.; Golimowski, David A.; Ianna, Philip A.; Mason, Brian; McArthur, Barbara; Nelan, Edmund; Torres, Guillermo

2004-01-01

205

Isotope-geochemical Sm-Nd, ENd and TDM data of the layered paleoproterozoic PGE massif Monchetundra (Kola peninsula)  

NASA Astrophysics Data System (ADS)

Monchetundra massif is located in the central part of the Kola Peninsula and it is the south-eastern part of the Main Ridge Intrusion. The massif is subdivided into two up to five syngenetic zones by different researchers (Nazimova, Rayan, 2008, Nerovich et. al. 2009, Layered intrusions…p.1, 2004). According the isotope-geochronological and isotope-geochemical data it can identify at least four groups of rocks distinguishing by ages. The aim of this study is to identify the isotope-geochemical Sm-Nd (ENd and TDM) data of the mafic rocks of the massif Monchetundra. For the interpretation of these data it was selected 40 analyzes of rocks sampled during field works within Monchetundra massif in 2011-2012 and from the published data (Nerovich et. al., 2009, Bayanova et. al., 2010, Layered intrusions…p.2, 2004). The earliest group of rocks is dated by U-Pb zircon in 2521 ± 8 Ma (Bayanova et. al., 2010). It consist of metagabbroids of wide composition range from anorthosite up to gabbro, which also called «amphibole-plagioclase rocks» (Nerovich et. al., 2009) due to their strong metamorphic changes. These rocks are characterized by ENd values from -0.02 up to -2.23 (at the time of rocks formation) as well as mesoarchean and paleoarchean values of model ages. The second group of rocks is composed of medium- grained and coarse-grained mesocratic gabbronorites of trachytoid texture and their amphibolized varieties. The rocks of this group were dated in 2505 ± 6 Ma and 2501 ± 8 Ma (Layered intrusions…p.1., 2004). Values of ENd for these rocks vary from -1.70 up to +1.42, model ages correspond to the range from 2.7 up to 3.5 Ga. Leucocratic gabbronorites, gabbronorite-anorthosites of massive texture and their metamorphosed varieties with garnet and amphibole constitute the third group of Monchetundra massife rocks. The formation age of these rocks has been determined on zircon and baddeleyite by U-Pb method and it is 2471 ± 9 Ma, 2476 ± 17 Ma, 2456 ± 5 Ma and 2453 ± 4 Ma (Bayanova et. al., 2010, Mitrofanov et. al., 1993). Value of ENd for this group rocks vary from -3.38 to +2.08, and the values of the model ages range between 2.7 and 3.4 Ga. Dyke-shaped bodies of melanocratic troctolites are found within the southeastern slope of Monchetundra massif. These rocks are characterized by positive values of ENd varying from +2.01 to +3.28, and the values of model ages are close to 2.7 Ga. Gabbro-pegmatites occur at the upper part of the Monchtundra massif and are characterized by negative ENd values from -1.26 up to -0.63, and model ages of protolith range from 3.0 to 3.2 Ga. Isotope-geochemical Sm-Nd (ENd and TDM) data indicate the origining of gabbro massif from EM-1 mantle plume reservoir and this fact is confirmed by the ENd-ISr diagrams in accordance with published data (Bayanova et. al., 2009). The research is conducted with the financial support of RFBR 13-05-00493, OFI-M 13-05-12055, 14-05-93965 and 14-05-00484.

Kunakkuzin, Evgeniy; Borisenko, Elena; Serov, Pavel

2014-05-01

206

Rugose corals from the upper Viséan (Carboniferous) of the Jerada Massif (NE Morocco): taxonomy, biostratigraphy, facies and palaeobiogeography  

Microsoft Academic Search

The Viséan succession of the Jerada Massif contains a relatively diverse rugose coral fauna, which comprises 12 genera. Only\\u000a two of these (Siphonodendron and Lithostrotion) are reported to include more than one species. Most taxa show distinctive facies dependencies. Small solitary corals are\\u000a found in shaly environments of the Oued Es-Sassi Formation. On the northern flank a coral patch reef

Markus Aretz

2010-01-01

207

Paleomagnetism of Ordovician carbonate rocks from Malopolska Massif, Holy Cross Mountains, SE Poland — Magnetostratigraphic and geotectonic implications  

Microsoft Academic Search

The structural and geodynamic history of the Malopolska Massif (Holy Cross Mountains — Poland), situated within the Trans-European Suture Zone (TESZ) is still a matter of debate. Recent provenance studies and biogeographical data indicate that the Malopolska is a Gondwana-derived terrane accreted to Baltica between late Mid-Cambrian and Tremadocian times. Existing paleomagnetic data, however, are equivocal. They indicate either close

M. Schätz; A. Zwing; J. Tait; Z. Belka; H. C. Soffel; V. Bachtadse

2006-01-01

208

Sr and Nd-isotope geochemistry of the Atlantis Massif (30°N, MAR): Implications for fluid fluxes and lithospheric heterogeneity  

Microsoft Academic Search

The Atlantis Massif (Mid-Atlantic Ridge, 30°N) is an oceanic core complex marked by distinct variations in crustal architecture, deformation and metamorphism over distances of at least 5 km. We report Sr and Nd isotope data and Rare Earth Element (REE) concentrations of gabbroic and ultramafic rocks drilled at the central dome (IODP Hole 1309D) and recovered by submersible from the southern

Adélie Delacour; Gretchen L. Früh-Green; Martin Frank; Marcus Gutjahr; Deborah S. Kelley

2008-01-01

209

The Arequipa Massif of Peru: New SHRIMP and isotope constraints on a Paleoproterozoic inlier in the Grenvillian orogen  

NASA Astrophysics Data System (ADS)

The enigmatic Arequipa Massif of southwestern Peru is an outcrop of Andean basement that underwent Grenville-age metamorphism, and as such it is important for the better constraint of Laurentia-Amazonia ties in Rodinia reconstruction models. U-Pb SHRIMP zircon dating has yielded new evidence on the evolution of the Massif between Middle Paleoproterozoic and Early Paleozoic. The oldest rock-forming events occurred in major orogenic events between ca. 1.79 and 2.1 Ga (Orosirian to Rhyacian), involving early magmatism (1.89-2.1 Ga, presumably emplaced through partly Archaean continental crust), sedimentation of a thick sequence of terrigenous sediments, UHT metamorphism at ca. 1.87 Ga, and late felsic magmatism at ca. 1.79 Ga. The Atico sedimentary basin developed in the Late-Mesoproterozoic and detrital zircons were fed from a source area similar to the high-grade Paleoproterozoic basement, but also from an unknown source that provided Mesoproterozoic zircons of 1200-1600 Ma. The Grenville-age metamorphism was of low- P type; it both reworked the Paleoproterozoic rocks and also affected the Atico sedimentary rocks. Metamorphism was diachronous: ca. 1040 Ma in the Quilca and Camaná areas and in the San Juán Marcona domain, 940 ± 6 Ma in the Mollendo area, and between 1000 and 850 Ma in the Atico domain. These metamorphic domains are probably tectonically juxtaposed. Comparison with coeval Grenvillian processes in Laurentia and in southern Amazonia raises the possibility that Grenvillian metamorphism in the Arequipa Massif resulted from extension and not from collision. The Arequipa Massif experienced Ordovician-Silurian magmatism at ca. 465 Ma, including anorthosites formerly considered to be Grenvillian, and high-T metamorphism deep within the magmatic arc. Focused retrogression along shear zones or unconformities took place between 430 and 440 Ma.

Casquet, C.; Fanning, C. M.; Galindo, C.; Pankhurst, R. J.; Rapela, C. W.; Torres, P.

2010-01-01

210

Seismic Velocity Variation within the Footwall of an Oceanic Core Complex - Atlantis Massif, Mid-Atlantic Ridge 30?N  

Microsoft Academic Search

The Atlantis Massif, an oceanic core complex (OCC) at 30ºN on the Mid-Atlantic Ridge, is hypothesized to have formed via long-lived slip on a detachment fault. Due to unroofing that results from this sustained slip, the domal core of the OCC is predicted to comprise lower crustal and\\/or upper mantle rock. Seafloor mapping and deep drilling confirm that this is

Ashlee S. Henig; Donna K. Blackman; Alistair J. Harding; Graham M. Kent; Juan-Pablo Canales

211

Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids  

Microsoft Academic Search

The Pingüino deposit, located in the low sulfidation epithermal metallogenetical province of the Deseado Massif, Patagonia,\\u000a Argentina, represents a distinct deposit type in the region. It evolved through two different mineralization events: an early\\u000a In-bearing polymetallic event that introduced In, Zn, Pb, Ag, Cd, Au, As, Cu, Sn, W and Bi represented by complex sulfide\\u000a mineralogy, and a late Ag–Au

Sebastián M. Jovic; Diego M. Guido; Isidoro B. Schalamuk; Francisco J. Ríos; Colombo C. G. Tassinari; Clemente Recio

2011-01-01

212

Age, geochemistry, and tectonic significance of Neoproterozoic alkaline granitoids in the northwestern margin of the Gyeonggi massif, South Korea  

Microsoft Academic Search

Alkaline meta-granitoids, ranging in composition from syenite to alkali granite, occur in the northwestern Gyeonggi massif. Ion microprobe U–Pb zircon analyses indicate that the granitoids were emplaced at 742±13Ma, and are corroborated by a Rb–Sr whole rock age of 770±40Ma. Major and trace element characteristics, together with Sr and Nd isotopic data, suggest that the granitoid magma was derived from

Seung Ryeol Lee; Moonsup Chob; Chang-Sik Cheong; Hyeoncheol Kimc; Michael T. D. Wingate

2003-01-01

213

3. MAIN HOSPITAL, VIEW OF EAST SIDE AND NORTHEAST CORNER. ...  

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

3. MAIN HOSPITAL, VIEW OF EAST SIDE AND NORTHEAST CORNER. - Presidio of San Francisco, Letterman General Hospital, Building No. 27, Letterman Hospital Complex, Edie Road, San Francisco, San Francisco County, CA

214

2. General view to northeast along Barton Avenue showing central ...  

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

2. General view to northeast along Barton Avenue showing central courtyard and rotunda of hospital - Portsmouth Naval Hospital, Hospital Building, Rixey Place, bounded by Williamson Drive, Holcomb Road, & The Circle, Portsmouth, Portsmouth, VA

215

4. VIEW OF AIRFIELD LOOKING NORTHEAST FROM BUILDING 8200 (CONTROL ...  

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

4. VIEW OF AIRFIELD LOOKING NORTHEAST FROM BUILDING 8200 (CONTROL TOWER) SHOWING ALTERNATE RUNWAY (TAXIWAY J). NORTH-SOUTH RUNWAY, AND TAXIWAY C AT LEFT. - Loring Air Force Base, Airfield, Central portion of base, Limestone, Aroostook County, ME

216

SOUTHWEST SIDE OF TANK, WITH ENTRY DOOR. Looking northeast ...  

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

SOUTHWEST SIDE OF TANK, WITH ENTRY DOOR. Looking northeast - Edwards Air Force Base, X-15 Engine Test Complex, Tank & Garage, Rogers Dry Lake, east of Runway between North Base & South Base, Boron, Kern County, CA

217

New Approach to Monitor Transboundary Particulate Pollution over Northeast Asia.  

National Technical Information Service (NTIS)

A new approach to more accurately monitor and evaluate transboundary particulate matter (PM) pollution is introduced based on aerosol optical products from Korea's Geostationary Ocean Color Imager (GOCI). The area studied is Northeast Asia (including east...

B. N. Holben, C. H. Song, C. K. Song, G. R. Carmichael, J. Kim, J. Lee, J. H. Woo, M. E. Park, R. S. Park, S. Lee, S. S. Lee, T. F. Eck, Y. D. Hong

2014-01-01

218

VIEW LOOKING NORTHEAST SHOWING TIPPLE FOR LOADING COKED COAL INTO ...  

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

VIEW LOOKING NORTHEAST SHOWING TIPPLE FOR LOADING COKED COAL INTO RAILROAD CARS (FRONT), COAL STORAGE BIN AND TIPPLE FOR COAL TO BE CHARGED IN FURNACES (BACK) - Alverton Coke Works, State Route 981, Alverton, Westmoreland County, PA

219

8. Interior view of first floor kitchen. View to northeast. ...  

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

8. Interior view of first floor kitchen. View to northeast. - U.S. Customs Service Port of Roosville, Immigration & Naturalization Service Residence, 45 feet southwest of Main Port Building, Eureka, Lincoln County, MT

220

66. SOUTH PLANT CHEMICAL STORAGE TANKS. VIEW TO NORTHEAST. ...  

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

66. SOUTH PLANT CHEMICAL STORAGE TANKS. VIEW TO NORTHEAST. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

221

7. View northeast showing 61 Sherman Avenue located at the ...  

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

7. View northeast showing 61 Sherman Avenue located at the eastern end of the village. - Kenyon Village, Kenyon School Road, Sherman Avenue, & Lewiston Avenue, Richmond (historical), Providence County, RI

222

3. View northeast showing Kenyon Arch Bridge (Rhode Island Bridge ...  

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

3. View northeast showing Kenyon Arch Bridge (Rhode Island Bridge No. 148) over Pawcatuck River (foreground) and portion of Kenyon Industries mill complex (background). - Kenyon Village, Kenyon School Road, Sherman Avenue, & Lewiston Avenue, Richmond (historical), Providence County, RI

223

3. VIEW NORTHEAST, SOUTH FRONT OF SOIL CONSERVATION SERVICE CLUSTER ...  

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

3. VIEW NORTHEAST, SOUTH FRONT OF SOIL CONSERVATION SERVICE CLUSTER (BUILDING 25) - U.S. Plant Introduction Station, Soil Conservation Service Cluster, 11601 Old Pond Road, Glenn Dale, Prince George's County, MD

224

Looking Northeast in Oxide Building at Reactors on Second Floor ...  

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

Looking Northeast in Oxide Building at Reactors on Second Floor Including Reactor One (Left) and Reactor Two (Right) - Hematite Fuel Fabrication Facility, Oxide Building & Oxide Loading Dock, 3300 State Road P, Festus, Jefferson County, MO

225

3. NORTHEAST VIEW OF SOUTH SIDE, WITH ADDITION ON SOUTHEAST ...  

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

3. NORTHEAST VIEW OF SOUTH SIDE, WITH ADDITION ON SOUTHEAST SIDE - Juniata Mill Complex, Mine & Camp Residence, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

226

2. SOUTH VIEW OF NORTHWEST AND NORTHEAST SIDES (NORTH CORNER). ...  

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

2. SOUTH VIEW OF NORTHWEST AND NORTHEAST SIDES (NORTH CORNER). NORTHWEST SIDE OF ASSAY OFFICE ON LEFT - Juniata Mill Complex, Mine Office, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

227

7. CONTEXTUAL VIEW NORTHEAST TOWARDS FEATURES 6 (LEFT) AND 7 ...  

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

7. CONTEXTUAL VIEW NORTHEAST TOWARDS FEATURES 6 (LEFT) AND 7 (RIGHT) WITHIN MILL COMPLEX. - Juniata Mill Complex, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

228

3. NORTHEAST VIEW OF SOUTHWEST CORNER (WEST AND SOUTH SIDES) ...  

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

3. NORTHEAST VIEW OF SOUTHWEST CORNER (WEST AND SOUTH SIDES) - Juniata Mill Complex, Camp Bunk House, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

229

2. NORTHEAST VIEW OF SOUTH SIDE WITH ADDITION ON SOUTHWEST ...  

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

2. NORTHEAST VIEW OF SOUTH SIDE WITH ADDITION ON SOUTHWEST - Juniata Mill Complex, Mine & Camp Residence, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

230

1. SOUTH VIEW OF NORTHWEST SIDE, WITH NORTHEAST SIDE OF ...  

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

1. SOUTH VIEW OF NORTHWEST SIDE, WITH NORTHEAST SIDE OF MINE OFFICE ON RIGHT OF PHOTO - Juniata Mill Complex, Assay Office, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

231

2. VIEW WESTSOUTHWEST OF NORTHEAST AND SOUTHEAST SIDES Juniata ...  

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

2. VIEW WEST-SOUTHWEST OF NORTHEAST AND SOUTHEAST SIDES - Juniata Mill Complex, Mine Camp Building, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

232

2. NORTHEAST VIEW OF SOUTHWEST CORNER, WEST AND SOUTH SIDES. ...  

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

2. NORTHEAST VIEW OF SOUTHWEST CORNER, WEST AND SOUTH SIDES. PARTIALLY SUNKEN TUB ON LEFT SIDE. - Juniata Mill Complex, Pump House, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

233

1. SOUTHWEST VIEW OF NORTHEAST CORNER, NORTH AND EAST SIDES ...  

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

1. SOUTHWEST VIEW OF NORTHEAST CORNER, NORTH AND EAST SIDES - Juniata Mill Complex, Mine & Camp Residence, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

234

4. VIEW SOUTHSOUTHEAST OF NORTHWEST AND NORTHEAST SIDES OF BUILDING. ...  

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

4. VIEW SOUTH-SOUTHEAST OF NORTHWEST AND NORTHEAST SIDES OF BUILDING. COLLAPSED STRUCTURE IN FOREGROUND - Juniata Mill Complex, Mine Camp Building, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

235

2. SOUTHSOUTHWEST VIEW OF NORTHEAST CORNER, NORTH AND EAST SIDES ...  

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

2. SOUTH-SOUTHWEST VIEW OF NORTHEAST CORNER, NORTH AND EAST SIDES - Juniata Mill Complex, Camp Bunk House, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

236

2. NORTHEAST VIEW OF SOUTHWEST CORNER, WEST AND SOUTH SIDES ...  

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

2. NORTHEAST VIEW OF SOUTHWEST CORNER, WEST AND SOUTH SIDES - Juniata Mill Complex, Mine & Camp Residence, 22.5 miles Southwest of Hawthorne, between Aurora Crater & Aurora Peak, Hawthorne, Mineral County, NV

237

View towards the northeast of coffee beans drying on the ...  

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View towards the northeast of coffee beans drying on the third floor with hopper and drum type dryer in background - Santaella Coffee Processing Site, Highway 139, Kilometer 10.6, Maraguez, Ponce Municipio, PR

238

14. VEHICLE STORAGE BUILDING NORTHWEST SIDE AND NORTHEAST REAR. VIEW ...  

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14. VEHICLE STORAGE BUILDING NORTHWEST SIDE AND NORTHEAST REAR. VIEW TO SOUTHEAST. - Minuteman III ICBM Launch Control Facility November-1, 1.5 miles North of New Raymer & State Highway 14, New Raymer, Weld County, CO

239

3. CONTEXTUAL VIEW OF NORTHEAST CORNER OF TAN 629 HANGAR, ...  

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3. CONTEXTUAL VIEW OF NORTHEAST CORNER OF TAN 629 HANGAR, TAKEN FROM OUTSIDE FENCE, FACING SOUTHWEST. - Idaho National Engineering Laboratory, Test Area North, Hangar No. 629, Scoville, Butte County, ID

240

6. SOUTH END OF TAN 629 HANGAR, FACING NORTHEAST. DETAIL ...  

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

6. SOUTH END OF TAN 629 HANGAR, FACING NORTHEAST. DETAIL OF HANGAR DOOR, EMPENNAGE DOOR, DOOR PATCHES. - Idaho National Engineering Laboratory, Test Area North, Hangar No. 629, Scoville, Butte County, ID

241

3. VIEW NORTHEAST OF PORT BOW OF JFK IN DRYDOCK ...  

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3. VIEW NORTHEAST OF PORT BOW OF JFK IN DRYDOCK NO. 5; PAINTERS WORKING APPLYING ANTI-FOULING PAINT BELOW WATER LINE. - Naval Base Philadelphia-Philadelphia Naval Shipyard, Dry Dock No. 5, League Island, Philadelphia, Philadelphia County, PA

242

Battery Berry Observation Station, general view to northeast Fort ...  

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Battery Berry Observation Station, general view to northeast - Fort McKinley, Battery Berry Observation Station, North side of Wood Side Drive approximately 80 feet east of Spring Cove Lane, Great Diamond Island, Portland, Cumberland County, ME

243

Battery Honeycutt Observation Station, general view to northeast Fort ...  

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Battery Honeycutt Observation Station, general view to northeast - Fort McKinley, Battery Honeycutt Observation Station, East side of East Side Drive, approximately 225 feet south of Cove Side Drive, Great Diamond Island, Portland, Cumberland County, ME

244

Basement hall under the northeast part of the building. Live ...  

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Basement hall under the northeast part of the building. Live animal cages and dissection rooms are to the right. Note concrete footings. - San Bernardino Valley College, Life Science Building, 701 South Mount Vernon Avenue, San Bernardino, San Bernardino County, CA

245

Looking southwest, this photograph demonstrates the northeast corner of E ...  

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

Looking southwest, this photograph demonstrates the northeast corner of E Building, with a glimpse of part of the east entrance - Department of Energy, Mound Facility, Electronics Laboratory Building (E Building), One Mound Road, Miamisburg, Montgomery County, OH

246

1. Keeper's house and light tower, view north northeast, southwest ...  

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

1. Keeper's house and light tower, view north northeast, southwest and southeast sides of house, northwest and southwest sides of tower - Wood Island Light Station, East end of Wood Island, at mouth of Soo River, Biddeford Pool, York County, ME

247

1. SOUTHEAST REAR WALL AND NORTHEAST SIDE WALL OF CABINS ...  

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

1. SOUTHEAST REAR WALL AND NORTHEAST SIDE WALL OF CABINS FORGEMAN'S HOUSE NO. 1 AT RIGHT - Mount Etna Iron Works, Forgeman's House No. 1, Legislative Route 07020 between junctions of T.R. 461 & 463, Williamsburg, Blair County, PA

248

4. VIEW TO NORTHEAST, SKINNER SALT ROASTERS, SAMPLING BUILDING, WATER ...  

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4. VIEW TO NORTHEAST, SKINNER SALT ROASTERS, SAMPLING BUILDING, WATER TOWER, AND OFFICE BUILDING. - Vanadium Corporation of America (VCA) Naturita Mill, 3 miles Northwest of Naturita, between Highway 141 & San Miguel River, Naturita, Montrose County, CO

249

2. VIEW TO NORTHEAST (ORE RECEIVING PLATFORM OUT OF VIEW ...  

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2. VIEW TO NORTHEAST (ORE RECEIVING PLATFORM OUT OF VIEW TO RIGHT). - Vanadium Corporation of America (VCA) Naturita Mill, Sampling Building & Ore Receiving Platform, 3 miles Northwest of Naturita, between Highway 141 & San Miguel River, Naturita, Montrose County, CO

250

6. INTERIOR OF NORTHEAST ROOM AND MEZZANINE, SOUTHWEST VIEW. ...  

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

6. INTERIOR OF NORTHEAST ROOM AND MEZZANINE, SOUTHWEST VIEW. - Vanadium Corporation of America (VCA) Naturita Mill, Sampling Building & Ore Receiving Platform, 3 miles Northwest of Naturita, between Highway 141 & San Miguel River, Naturita, Montrose County, CO

251

3. VIEW TO SOUTHWEST (NORTHEAST CORNER OF EDIBLE FATS FACTORY) ...  

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3. VIEW TO SOUTHWEST (NORTHEAST CORNER OF EDIBLE FATS FACTORY) - Wilson's Oil House, Lard Refinery, & Edible Fats Factory, Edible Fats Factory, 2801 Southwest Fifteenth Street, Oklahoma City, Oklahoma County, OK

252

7. Office and warehouse building. South side. View to northeast. ...  

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

7. Office and warehouse building. South side. View to northeast. - Conrad Refining Company Oil Refinery, Office & Warehouse Building, 60 feet northwest of centerline at Montana Secondary Highway 219, Conrad, Pondera County, MT

253

2. NORTHEAST CORNER OF LARD REFINERY (CONNECTING BUILDING ON THE ...  

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

2. NORTHEAST CORNER OF LARD REFINERY (CONNECTING BUILDING ON THE RIGHT) - Wilson's Oil House, Lard Refinery, & Edible Fats Factory, Lard Refinery, 2801 Southwest Fifteenth Street, Oklahoma City, Oklahoma County, OK

254

2. View looking northeast at Dixie Cotton Mill warehouses. Note ...  

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

2. View looking northeast at Dixie Cotton Mill warehouses. Note firestops between sections of the building to prevent fire from spreading. - Dixie Cotton Mill, Warehouses, 710 Greenville Street, La Grange, Troup County, GA

255

View from southwest to northeast of PAR site fresh water ...  

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View from southwest to northeast of PAR site fresh water pump house - Stanley R. Mickelsen Safeguard Complex, Fresh Water Pump House, In Limited Access Area, on Patrol Road next to Open Storage Reservoir No. 736, Nekoma, Cavalier County, ND

256

2. VIEW NORTHEAST, SOUTH FRONT OF DAYVILLE MILLS COMPLEX LOOKING ...  

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

2. VIEW NORTHEAST, SOUTH FRONT OF DAYVILLE MILLS COMPLEX LOOKING ACROSS ROUTE 101, MAIN MILL BUILDING - Dayville Mills Hydroelectric Facility, North side of Route 101, .5 mile west of Route 395, Killingly Center, Windham County, CT

257

View facing northeast (60°) of Structure 259, other transmission lines ...  

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

View facing northeast (60°) of Structure 25-9, other transmission lines and small farmstead visible in background - Havre Rainbow Transmission Line, Havre City to Great Falls vicinity, Montana, Great Falls, Cascade County, MT

258

View facing northeast of Structure 1034, last numbered structure on ...  

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

View facing northeast of Structure 103-4, last numbered structure on northern (Havre) end of Transmission Line - Havre Rainbow Transmission Line, Havre City to Great Falls vicinity, Montana, Great Falls, Cascade County, MT

259

10. Detail of truss located on top the northeast pier, ...  

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10. Detail of truss located on top the northeast pier, looking southwest. - Bridge No. 4800, Spanning Minnesota River on Trunk Highway 4 between Brown & Nicollet Counties, Sleepy Eye, Brown County, MN

260

2. Contextual view looking east, northeast, showing west elevation of ...  

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

2. Contextual view looking east, northeast, showing west elevation of Packing House and Union Ice building. - College Heights Lemon Packing House, 519-532 West First Street, Claremont, Los Angeles County, CA

261

DETAIL TOP VIEW OF AERIAL TRAMWAY DRIVE MECHANISM, LOOKING NORTHEAST. ...  

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

DETAIL TOP VIEW OF AERIAL TRAMWAY DRIVE MECHANISM, LOOKING NORTHEAST. THE FRICTION BRAKING SYSTEM CAN BE SEEN IN SHADOW ABOVE THE LARGE CABLE WHEEL BELOW. - Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

262

8. SECOND FLOOR, INTERIOR, LOOKING SOUTH FROM NORTHEAST CORNER (INTERIOR ...  

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

8. SECOND FLOOR, INTERIOR, LOOKING SOUTH FROM NORTHEAST CORNER (INTERIOR OF CONCRETE BLOCK ADDITION VISIBLE TO THE RIGHT) - Gerber Sheet Metal Works Building, 128 Porthand Avenue, South, Minneapolis, Hennepin County, MN

263

Exterior oblique view of the northwest end and northeast side. ...  

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Exterior oblique view of the northwest end and northeast side. View facing south-southeast - U.S. Naval Base, Pearl Harbor, Paint Shop & Rigging Loft, Sixth Street between Avenues E & G, Pearl City, Honolulu County, HI

264

Looking Northeast at Southwest End of Maintenance Shop with Milling ...  

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

Looking Northeast at Southwest End of Maintenance Shop with Milling Machines, Hoist, Electrical Boxes in Recycle Recovery Building - Hematite Fuel Fabrication Facility, Recycle Recovery Building, 3300 State Road P, Festus, Jefferson County, MO

265

9. Boathouse, view south, northeast and northwest sides, with top ...  

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

9. Boathouse, view south, northeast and northwest sides, with top of lighthouse tower in distance - Squirrel Point Light Station, Off Highway 127, Steen Road to end of Bald Head Road, .8 mile down footpath, Arrowsic, Sagadahoc County, ME

266

4. PERSPECTIVE VIEW TO THE NORTHEAST OF THE CREW SHELTER ...  

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4. PERSPECTIVE VIEW TO THE NORTHEAST OF THE CREW SHELTER IN AR-8. - Edwards Air Force Base, South Base, Rammed Earth Aircraft Dispersal Revetments, Western Shore of Rogers Dry Lake, Boron, Kern County, CA

267

15. SOUTHEAST AND NORTHEAST WALLS OF CREW SHELTER LOCATED BETWEEN ...  

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

15. SOUTHEAST AND NORTHEAST WALLS OF CREW SHELTER LOCATED BETWEEN THE PURSUIT PLANE BAYS OF AR-9. - Edwards Air Force Base, South Base, Rammed Earth Aircraft Dispersal Revetments, Western Shore of Rogers Dry Lake, Boron, Kern County, CA

268

VIEW LOOKING NORTHEAST AT EARTH MOUND. NOTE THE RECTANGULAR OPENINGS ...  

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

VIEW LOOKING NORTHEAST AT EARTH MOUND. NOTE THE RECTANGULAR OPENINGS USED FOR OBSERVATION EQUIPMENT AND PERISCOPE TOPS. - Marshall Space Flight Center, Redstone Rocket (Missile) Test Stand, Dodd Road, Huntsville, Madison County, AL

269

Southwest (front) and southeast (side) elevations, view to northeast ...  

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

Southwest (front) and southeast (side) elevations, view to northeast - Bureau of Mines Metallurgical Research Laboratory, Original Building, Date Street north of U.S. Highway 93, Boulder City, Clark County, NV

270

Southeast (side) and northeast (rear) elevations, view to northwest ...  

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

Southeast (side) and northeast (rear) elevations, view to northwest - Bureau of Mines Metallurgical Research Laboratory, Original Building, Date Street north of U.S. Highway 93, Boulder City, Clark County, NV

271

Northeast (rear) and northwest (side) elevations, view to southwest ...  

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

Northeast (rear) and northwest (side) elevations, view to southwest - Bureau of Mines Metallurgical Research Laboratory, Original Building, Date Street north of U.S. Highway 93, Boulder City, Clark County, NV

272

32. INTERIOR VIEW, MUSIC ROOM LOCATED AT THE NORTHEAST CORNER ...  

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

32. INTERIOR VIEW, MUSIC ROOM LOCATED AT THE NORTHEAST CORNER OF THE HOUSE ON THE FIRST FLOOR, LOOKING TO THE FIREPLACE IN THE EAST WALL - Arlington Place, 331 Cotton Avenue, Southwest, Birmingham, Jefferson County, AL

273

39. VIEW TO NORTHEAST; WEST FRONT MBE BUILDING, FIRST FLOOR, ...  

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

39. VIEW TO NORTHEAST; WEST FRONT MBE BUILDING, FIRST FLOOR, FRED HARVEY NEWSSTAND STOREROOM (AREA BURNED BY VANDALS) (Dobson) - Los Angeles Union Passenger Terminal, Mail, Baggage, & Express Building, 800 North Alameda Street, Los Angeles, Los Angeles County, CA

274

SULPHITE BRIDGE FROM DOWNSTREAM, BEARING NORTHEAST 25 DEGREES. THE BRIDGE ...  

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

SULPHITE BRIDGE FROM DOWNSTREAM, BEARING NORTHEAST 25 DEGREES. THE BRIDGE ONCE HAD VERTICAL BOARD SIDING BUT VANDALS BURNED IT OFF IN 1981 - Sulphite Railroad Bridge, Former Boston & Maine Railroad (originally Tilton & Franklin Railroad) spanning Winnipesautee River, Franklin, Merrimack County, NH

275

6. VIEW NORTHEAST, WEST END OF DAM DURING CONSTRUCTION OF ...  

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

6. VIEW NORTHEAST, WEST END OF DAM DURING CONSTRUCTION OF FISHWAY, DECEMBER 1995, SHOWING REMOVAL OF PLANKING - Norwich Water Power Company, Dam, West bank of Shetucket River opposite Fourteenth Street, Greenville section, Norwich, New London County, CT

276

NORTHEAST (SIDE) AND NORTHWEST (REAR) ELEVATIONS OF BUILDING. VIEW TO ...  

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

NORTHEAST (SIDE) AND NORTHWEST (REAR) ELEVATIONS OF BUILDING. VIEW TO SOUTH - Plattsburgh Air Force Base, Industrial Wastewater Treatment & Disposal Facility, Off LeMay Road, outside SAC Alert Area, Plattsburgh, Clinton County, NY

277

SOUTHEAST (FRONT) AND NORTHEAST (SIDE) ELEVATIONS OF BUILDING. VIEW TO ...  

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

SOUTHEAST (FRONT) AND NORTHEAST (SIDE) ELEVATIONS OF BUILDING. VIEW TO WEST - Plattsburgh Air Force Base, Industrial Wastewater Treatment & Disposal Facility, Off LeMay Road, outside SAC Alert Area, Plattsburgh, Clinton County, NY

278

View of 175 ton hoisthouse from northeast. Hoist operator's cab ...  

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

View of 175 ton hoist-house from northeast. Hoist operator's cab is in foreground center. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

279

8. VIEW NORTHEAST, WORKSHOP PIERS Imperial Carbon Black Plant ...  

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

8. VIEW NORTHEAST, WORKSHOP PIERS - Imperial Carbon Black Plant (Ruin), North side of North Fork of Hughes River along Bunnell Run Road just over 0.5 mile from its intersection with State Route 16, Harrisville, Ritchie County, WV

280

7. VIEW NORTHEAST, COOLING TANK Imperial Carbon Black Plant ...  

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

7. VIEW NORTHEAST, COOLING TANK - Imperial Carbon Black Plant (Ruin), North side of North Fork of Hughes River along Bunnell Run Road just over 0.5 mile from its intersection with State Route 16, Harrisville, Ritchie County, WV

281

12. VIEW NORTHEAST, DETAIL OF BRACE ON SOUTH ELEVATION, MILEPOST ...  

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

12. VIEW NORTHEAST, DETAIL OF BRACE ON SOUTH ELEVATION, MILEPOST SIGNBOARD TO LEFT OF BRACE - Meeting House Bridge, Spanning Boston & Maine Railroad 0.1 mile east of Biddleford Road, Arundel, York County, ME

282

1. FAN HOUSE FROM NORTHEAST Sublet Mine No. 6, ...  

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

1. FAN HOUSE FROM NORTHEAST - Sublet Mine No. 6, Fan House, North structure, west side of Willow Creek Valley, east of County Road No. 306, 3 miles north of U.S. Highway 189, Kemmerer, Lincoln County, WY

283

View northeast of the waterfront from 350 ton crane. ...  

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

View northeast of the waterfront from 350 - ton crane. The "mothballed" carrier Iwo Jima is tied up at pier 2 in the mid-background. - Naval Base Philadelphia-Philadelphia Naval Shipyard, League Island, Philadelphia, Philadelphia County, PA

284

9. VIEW NORTHEAST (32 DEGREES) OF SOUTHWEST FACADE AT RCA ...  

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

9. VIEW NORTHEAST (32 DEGREES) OF SOUTHWEST FACADE AT RCA COMMUNICATION REC. STATION. BRACKETS WERE FOR LEADS ON TERMINATION FRAMES THAT WERE REMOVED. - Marconi Radio Sites, Receiving, Point Reyes Station, Marin County, CA

285

10. Underside of bridge, view to northeast along centerline from ...  

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

10. Underside of bridge, view to northeast along centerline from south abutment, center pier in background. Note transverse floor beams, intermediate stringers, depth of main girders. - Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

286

BASEMENT, A view looking northeast that captures the storage lockers ...  

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

BASEMENT, A view looking northeast that captures the storage lockers in the woman's side of the change room (Room 119A) - Department of Energy, Mound Facility, Isolated Building (I Building), One Mound Road, Miamisburg, Montgomery County, OH

287

22. LOOKING NORTHEAST FROM RECEIVING PLATFORM AT THE REAR (EAST ...  

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

22. LOOKING NORTHEAST FROM RECEIVING PLATFORM AT THE REAR (EAST SIDE) OF BUILDING, SHOWING SOUTH SIDE OF NORTH WING AND SOUTH SIDE OF FOOD PRESERVATION AND SANITATION LABORATORY (Harms) - Dairy Industry Building, Iowa State University campus, Ames, Story County, IA

288

18. VIEW NORTHEAST, SHAFT, CAM, AND OPERATING ARM FOR NORTH ...  

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

18. VIEW NORTHEAST, SHAFT, CAM, AND OPERATING ARM FOR NORTH END LOCK, INBOARD SIDE OF WEST BASCULE GIRDER - Grand Street Bridge, Spanning Pequonnock River at Grand Street, Bridgeport, Fairfield County, CT

289

13. VIEW NORTHEAST, BUILDING 12 INTERIOR, WIND TUNNEL FAN ASSEMBLY ...  

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

13. VIEW NORTHEAST, BUILDING 12 INTERIOR, WIND TUNNEL FAN ASSEMBLY - Naval Surface Warfare Center, Transonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

290

19. PHOTOCOPY OF c. 1920 VIEW LOOKING NORTHEAST. COURTESY OF ...  

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

19. PHOTOCOPY OF c. 1920 VIEW LOOKING NORTHEAST. COURTESY OF GWENDOLYN G. de CLAIRVILLE, HUNTINGTON, WEST VIRGINIA 11743 - Lefferts Tide Mill, Huntington Harbor, Southdown Road, Huntington, Suffolk County, NY

291

14. September 20, 1950, source not known VIEW NORTHEAST, SOUTH ...  

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

14. September 20, 1950, source not known VIEW NORTHEAST, SOUTH ELEVATIONS, MECHANICS SAVINGS BANK AND ADJOINING BUILDING TO EAST - Mechanics Savings Bank Building, 80 Pearl Street, Hartford, Hartford County, CT

292

51. LOOKING NORTHEAST AT EIMCO WASTE WATER TREATMENT THICKENER No. ...  

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

51. LOOKING NORTHEAST AT EIMCO WASTE WATER TREATMENT THICKENER No. 2, ELECTRIC POWERHOUSE No. 2, AND OUTDOOR ELECTRICAL SUBSTATION IN BACKGROUND. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA

293

12. NORTHEAST VIEW OF THE WASTE WATER TREATMENT COMPLEX FOR ...  

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

12. NORTHEAST VIEW OF THE WASTE WATER TREATMENT COMPLEX FOR THE PRIMARY AND 22 BAR MILLS. - U.S. Steel Duquesne Works, Auxiliary Buildings & Shops, Along Monongahela River, Duquesne, Allegheny County, PA

294

INTERIOR VIEW LOOKING NORTHEAST, SHOWING FURNACE NO. 1 (ca. 1910. ...  

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

INTERIOR VIEW LOOKING NORTHEAST, SHOWING FURNACE NO. 1 (ca. 1910. Nameplate reads: "Heroult Electric Furnace, Capacity 6 tons, Built by American Bridge Company, Pencoyd, PA, No. 33") - Braeburn Alloy Steel, Braeburn Road at Allegheny River, Lower Burrell, Westmoreland County, PA

295

View of camera station located northeast of Building 70022, facing ...  

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

View of camera station located northeast of Building 70022, facing northwest - Naval Ordnance Test Station Inyokern, Randsburg Wash Facility Target Test Towers, Tower Road, China Lake, Kern County, CA

296

9. VIEW TO NORTHEAST. DETAIL, OBLIQUE VIEW OF WEST APPROACH ...  

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

9. VIEW TO NORTHEAST. DETAIL, OBLIQUE VIEW OF WEST APPROACH SPAN. NOTE PIN CONNECTIONS, UNDERSIDE DETAILS, SHADOW PATTERN CAST BY STEEL OPEN GRATE DECK. - Gianella Bridge, Spanning Sacramento River at State Highway 32, Hamilton City, Glenn County, CA

297

Detail of back of lion showing need for restoration, northeast ...  

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

Detail of back of lion showing need for restoration, northeast corner of bridge. - Connecticut Avenue Bridge, Spans Rock Creek & Potomac Parkway at Connecticut Avenue, Washington, District of Columbia, DC

298

View northeast, wharf A decking detail, showing floor of former ...  

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

View northeast, wharf A decking detail, showing floor of former light attendant station (las) or boathouse - U.S. Coast Guard Sandy Hook Station, Western Docking Structure, West of intersection of Canfield Road & Hartshorne Drive, Highlands, Monmouth County, NJ

299

Partial view of the northeast side at the western end ...  

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

Partial view of the northeast side at the western end showing rolling doors. View facing southwest - U.S. Naval Base, Pearl Harbor, Heavy Materials Storehouse, Second Street near Avenue C intersection, Pearl City, Honolulu County, HI

300

92. VIEW OF CHART RECORDERS AND PERSONAL COMPUTER LINING NORTHEAST ...  

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

92. VIEW OF CHART RECORDERS AND PERSONAL COMPUTER LINING NORTHEAST CORNER OF AUTOPILOT ROOM - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

301

VIEW OF PARTIAL FRONT ELEVATION OF MARINE BARRACKS, LOOKING NORTHEAST ...  

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

VIEW OF PARTIAL FRONT ELEVATION OF MARINE BARRACKS, LOOKING NORTHEAST (without scale stick). - Naval Computer & Telecommunications Area Master Station, Eastern Pacific, Radio Transmitter Facility Lualualei, Marine Barracks, Intersection of Tower Drive & Morse Street, Makaha, Honolulu County, HI

302

VIEW OF PARTIAL FRONT ELEVATION OF MARINE BARRACKS, LOOKING NORTHEAST ...  

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

VIEW OF PARTIAL FRONT ELEVATION OF MARINE BARRACKS, LOOKING NORTHEAST (with scale stick) - Naval Computer & Telecommunications Area Master Station, Eastern Pacific, Radio Transmitter Facility Lualualei, Marine Barracks, Intersection of Tower Drive & Morse Street, Makaha, Honolulu County, HI

303

4. View northeast of west (partial) and south elevations. ...  

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

4. View northeast of west (partial) and south elevations. - Natick Research & Development Laboratories, Climatic Chambers Building, U.S. Army Natick Research, Development & Engineering Center (NRDEC), Natick, Middlesex County, MA

304

15. View northeast of main control panels, Arctic and Tropic ...  

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

15. View northeast of main control panels, Arctic and Tropic Chambers, in machine area. - Natick Research & Development Laboratories, Climatic Chambers Building, U.S. Army Natick Research, Development & Engineering Center (NRDEC), Natick, Middlesex County, MA

305

A VIEW OF BUILDING 1502 LOOKING NORTHEAST AT SOUTHWEST CORNER ...  

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

A VIEW OF BUILDING 1502 LOOKING NORTHEAST AT SOUTHWEST CORNER FROM ON TOP OF CONTROL TOWER (12/29/2007) - Wake Island Airfield, Terminal Building, West Side of Wake Avenue, Wake Island, Wake Island, UM

306

WAKE ISLAND AIRFIELD TERMINAL, BUILDING 1502 LOOKING NORTHEAST AT WEST ...  

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

WAKE ISLAND AIRFIELD TERMINAL, BUILDING 1502 LOOKING NORTHEAST AT WEST SIDE SHOWING FLAG, GUN, ENGINES (12/29/2007) - Wake Island Airfield, Terminal Building, West Side of Wake Avenue, Wake Island, Wake Island, UM

307

WAKE ISLAND AIRFIELD TERMINAL, BUILDING 1502 LOOKING NORTHEAST AT SOUTHWEST ...  

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

WAKE ISLAND AIRFIELD TERMINAL, BUILDING 1502 LOOKING NORTHEAST AT SOUTHWEST CORNER FROM BEHIND CONTROL TOWER (12/28/2007) - Wake Island Airfield, Terminal Building, West Side of Wake Avenue, Wake Island, Wake Island, UM

308

Detail showing connection of trusses to counter weights. View northeast ...  

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

Detail showing connection of trusses to counter weights. View northeast - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

309

113. COOLING WATER PIPING INTO COMPRESSORS, NORTHEAST CORNER OF MECHANICAL ...  

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

113. COOLING WATER PIPING INTO COMPRESSORS, NORTHEAST CORNER OF MECHANICAL EQUIPMENT ROOM (201), LSB (BLDG. 751) - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

310

2. DETAIL VIEW OF ANIMAL HOUSE SHOWING NORTHEAST AND SOUTHEAST ...  

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

2. DETAIL VIEW OF ANIMAL HOUSE SHOWING NORTHEAST AND SOUTHEAST FACADES AND CONNECTION TO SOUTHEAST FACADE OF STATION GARAGE. VIEW TO WEST. - VA Medical Center, Aspinwall Division, Animal House, 5103 Delafield Avenue, Aspinwall, Allegheny County, PA

311

Aerial view looking northeast. Photograph taken over historic district looking ...  

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

Aerial view looking northeast. Photograph taken over historic district looking toward buildings 1 and 2 at right center. City of San Diego in distance. - Naval Air Station North Island, North Island, San Diego, San Diego County, CA

312

1. COTTAGE 'HI 64', SOUTHEAST (FRONT) AND NORTHEAST SIDE ELEVATIONS, ...  

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

1. COTTAGE 'HI 64', SOUTHEAST (FRONT) AND NORTHEAST SIDE ELEVATIONS, LOOKING WEST - Hunting Island Lighthouse, Cottage HI-64, Hunting Island State Park, US Route 21, 16 miles East of Beaufort, Beaufort, Beaufort County, SC

313

12. LAMP MECHANISM WEIGHT PIT, WITH SCALE, LOOKING NORTHEAST ...  

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

12. LAMP MECHANISM WEIGHT PIT, WITH SCALE, LOOKING NORTHEAST - Hunting Island Lighthouse, Lighthouse, Hunting Island State Park, U.S. Route 21, 16 miles East of Beaufort, Beaufort, Beaufort County, SC

314

1. View Northeast, West Front, Elevation of Building 7 Note ...  

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

1. View Northeast, West Front, Elevation of Building 7 Note opening to shaft to beer vault in foreground - Weissner Brewery, Building Nos. 6 & 7, 1700 North Gay Street, Baltimore, Independent City, MD

315

112. REFRIGERANT CONDENSER TANKS AND PRESSURE CONTROLS IN NORTHEAST CORNER ...  

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

112. REFRIGERANT CONDENSER TANKS AND PRESSURE CONTROLS IN NORTHEAST CORNER OF MECHANICAL EQUIPMENT ROOM (201), LSB (BLDG. 751) - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

316

90. VIEW NORTHEAST OF BUILDING 98 OIL HOUSE AND STORAGE ...  

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

90. VIEW NORTHEAST OF BUILDING 98 OIL HOUSE AND STORAGE TANK; OIL FOR POWER GENERATION WAS UNLOADED FROM TANK CARS AND STORED AT THIS FACILITY - Scovill Brass Works, 59 Mill Street, Waterbury, New Haven County, CT

317

3. Oil House, Southern Pacific Railroad Carlin, northeast elevation, view ...  

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

3. Oil House, Southern Pacific Railroad Carlin, northeast elevation, view to southwest (135mm lens). - Southern Pacific Railroad, Carlin Shops, Oil House, Foot of Sixth Street, Carlin, Elko County, NV

318

1. BUILDING 411A. VIEW TO NORTHEAST. Rocky Mountain Arsenal, ...  

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

1. BUILDING 411A. VIEW TO NORTHEAST. - Rocky Mountain Arsenal, Sulfur Monochloride & Dichloride Manufacturing, 1003 feet South of December Seventh Avenue; 412 feet East of D Street, Commerce City, Adams County, CO

319

Detail of northeast wing wall and guiderail. The section of ...  

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

Detail of northeast wing wall and guiderail. The section of the wing wall in the foreground is a historic extension of this element. - Chester County Bridge No. 225, Spanning Tweed Creek at Hopewell Road, Oxford, Chester County, PA

320

4. Northeast side of Building 1009, (enlisted waves' barracks), looking ...  

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

4. Northeast side of Building 1009, (enlisted waves' barracks), looking southwest - Naval Air Station Chase Field, Building 1009, Essex Street, .68 mile South-southeast of intersection of Texas State Highway 202 & Independence Street, Beeville, Bee County, TX

321

4. Northeast side of Building 1015 (land plane hangar), looking ...  

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

4. Northeast side of Building 1015 (land plane hangar), looking southwest - Naval Air Station Chase Field, Building 1015, Byrd Street, .82 mile South-southeast of intersection of Texas State Highway 202 & Independence Street, Beeville, Bee County, TX

322

3. Southwest side of quarters (executive officer's quarters), looking northeast ...  

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

3. Southwest side of quarters (executive officer's quarters), looking northeast - Naval Air Station Chase Field, Quarters S, Essex Street, .45 mile South-Southeast of intersection of Texas State Highway 202 & Independence Street, Beeville, Bee County, TX

323

1. Northeast side of Building 1042 (brig), looking southwest ...  

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

1. Northeast side of Building 1042 (brig), looking southwest - Naval Air Station Chase Field, Building 1042, Ofstie Road, .6 mile South-Southeast of intersection of Texas State Highway 202 & Independence Street, Beeville, Bee County, TX

324

8. Overview of site, looking northeast Naval Air Station ...  

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

8. Overview of site, looking northeast - Naval Air Station Chase Field, Building 1001, Independence Street, .45 mile south of intersection of Texas State Highway & Independence Street, Beeville, Bee County, TX

325

8. Southwest side of Building 1040 (chapel), looking northeast ...  

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

8. Southwest side of Building 1040 (chapel), looking northeast - Naval Air Station Chase Field, Building 1040, Enterprise Street, .37 mile South-Southeast of intersection of Texas State Highway 202 & Independence Street, Beeville, Bee County, TX

326

PIRATA Northeast Extension 2011 / AEROSE-VII Cruise Report  

E-print Network

Spells (Hampton Univ.); Mayra Oyola, Justin Perry (Howard Univ.) OVERVIEW: The 2011 PIRATA Northeast for us to successfully conduct all operations despite an extremely tight cruise plan. The FOO, James

327

17. Photocopy of a photograph1921 EASTSIDE PLANT LOOKING NORTHEAST ...  

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

17. Photocopy of a photograph--1921 EASTSIDE PLANT LOOKING NORTHEAST - American Falls Water, Power & Light Company, Island Power Plant, Snake River, below American Falls Dam, American Falls, Power County, ID

328

11. GENERAL VIEW FROM WEST BANK LOOKING NORTHEAST (negative reversed) ...  

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

11. GENERAL VIEW FROM WEST BANK LOOKING NORTHEAST (negative reversed) - American Falls Water, Power & Light Company, Island Power Plant, Snake River, below American Falls Dam, American Falls, Power County, ID

329

VIEW, LOOKING NORTHEAST, OF BULLION FURNACE AND HOOD AT RIGHT, ...  

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

VIEW, LOOKING NORTHEAST, OF BULLION FURNACE AND HOOD AT RIGHT, AMALGAM PRESS ON STAND AT LEFT FOREGROUND, AND AMALGAMATION BARREL BEHIND IT. - Shenandoah-Dives Mill, 135 County Road 2, Silverton, San Juan County, CO

330

3. NORTHEAST SIDE OF OFFICE BUILDING ON SOUTH MAIN STREET, ...  

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

3. NORTHEAST SIDE OF OFFICE BUILDING ON SOUTH MAIN STREET, FACING WEST. SOUTHEAST END OF FACTORY IS VISIBLE LEFT OF CENTER. - Savage Tire Factory, Office Building, 2301 Main Street, San Diego, San Diego County, CA

331

1. General view looking northeast showing (from left to right) ...  

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

1. General view looking northeast showing (from left to right) storage shed, keepers' dwelling, and tower with attached oil house. - Bodie Island Light Station, Off Highway 12, Nags Head, Dare County, NC

332

Oblique view looking northeast at Machine Shop (Bldg. 163) from ...  

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

Oblique view looking northeast at Machine Shop (Bldg. 163) from Second Street - Atchison, Topeka, Santa Fe Railroad, Albuquerque Shops, Machine Shop, 908 Second Street, Southwest, Albuquerque, Bernalillo County, NM

333

Looking northeast from roof of Machine Shop (Bldg. 163) at ...  

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

Looking northeast from roof of Machine Shop (Bldg. 163) at transfer table pit and Boiler Shop (Bldg. 152) - Atchison, Topeka, Santa Fe Railroad, Albuquerque Shops, Machine Shop, 908 Second Street, Southwest, Albuquerque, Bernalillo County, NM

334

Looking northeast at Machine Shop (Bldg. 163) south wall. Note ...  

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

Looking northeast at Machine Shop (Bldg. 163) south wall. Note bridge crane at right and crane rail attached to building - Atchison, Topeka, Santa Fe Railroad, Albuquerque Shops, Machine Shop, 908 Second Street, Southwest, Albuquerque, Bernalillo County, NM

335

PERSPECTIVE VIEW OF LIBRARY IN ENVIRONMENT CONTEXT, LOOKING NORTHEAST FROM ...  

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

PERSPECTIVE VIEW OF LIBRARY IN ENVIRONMENT CONTEXT, LOOKING NORTHEAST FROM THE ROOF OF THE FRANKLIN INSTITUTE - Free Library of Philadelphia, Central Library, 1901 Vine Street, Philadelphia, Philadelphia County, PA

336

82. FIRST FLOOR BLDG. 19 LOOKING NORTHEAST. Fafnir Bearing ...  

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

82. FIRST FLOOR BLDG. 19 LOOKING NORTHEAST. - Fafnir Bearing Plant, Bounded on North side by Myrtle Street, on South side by Orange Street, on East side by Booth Street & on West side by Grove Street, New Britain, Hartford County, CT

337

15. Detail, northeast facade, operator's bow window and tower, showing ...  

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

15. Detail, northeast facade, operator's bow window and tower, showing knee braces carried on stone ancons used to support eaves, view to northwest, 90mm lens. - Southern Pacific Depot, 559 El Camino Real, San Carlos, San Mateo County, CA

338

13. Detail, typical window with fireproof shutters closed, northeast rear, ...  

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

13. Detail, typical window with fireproof shutters closed, northeast rear, view to southwest, 135mm lens. Note cracks evidencing structural failure. - Benicia Arsenal, Powder Magazine No. 5, Junction of Interstate Highways 680 & 780, Benicia, Solano County, CA

339

12. Detail, typical window with fireproof shutters open, northeast rear, ...  

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

12. Detail, typical window with fireproof shutters open, northeast rear, view to southwest, 135mm lens. Note cracks evidencing structural failure. - Benicia Arsenal, Powder Magazine No. 5, Junction of Interstate Highways 680 & 780, Benicia, Solano County, CA

340

Perspective view, northeast, of Ira Allen Chapel on the campus ...  

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

Perspective view, northeast, of Ira Allen Chapel on the campus of the University of Vermont. This Colonial Revival chapel was designed by McKim, Mead, and White in 1925. - Ira Allen Chapel, 26 University Place, Burlington, Chittenden County, VT

341

FACING NORTHEAST OF NORTHERN BOUNDARY OF PARK Candler Park ...  

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

FACING NORTHEAST OF NORTHERN BOUNDARY OF PARK - Candler Park Historic District, Roughly bounded by Moreland, Dekalb, McLendon & Harold Avenues, Matthews Street & Clifton Terrace, Atlanta, Fulton County, GA

342

7. General oblique view of south side, view to northeast ...  

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

7. General oblique view of south side, view to northeast showing dock area and canopy; note projecting entrance at egg candling room - Fort Hood, World War II Temporary Buildings, Cold Storage Building, Seventeenth Street, Killeen, Bell County, TX

343

FACING NORTHEAST ACROSS NORTHERN END OF PARK TOWARDS ITS NORTHERN ...  

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

FACING NORTHEAST ACROSS NORTHERN END OF PARK TOWARDS ITS NORTHERN CORNER - Candler Park Historic District, Roughly bounded by Moreland, Dekalb, McLendon & Harold Avenues, Matthews Street & Clifton Terrace, Atlanta, Fulton County, GA

344

3. West (left) and south (right) elevations. View to northeast. ...  

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

3. West (left) and south (right) elevations. View to northeast. - Locke Avenue Bridge, Bridge Tender's House, East side of Locke Avenue, 12 feet south of Locke Avenue Bridge, Swedesboro, Gloucester County, NJ

345

Fireplace detail, east wall, northeast secondfloor room, main block, showing ...  

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

Fireplace detail, east wall, northeast second-floor room, main block, showing ghost of surround and mantle. - Lazaretto Quarantine Station, Wanamaker Avenue and East Second Street, Essington, Delaware County, PA

346

Detail of northeast stair entry with vaulted stair landing and ...  

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

Detail of northeast stair entry with vaulted stair landing and ghost of former stair arch below stepped rail, facing west. - Marine Barracks, Panama Canal, Barracks Building, 100' North of Thatcher Highway, Balboa, Former Panama Canal Zone, CZ

347

2. OBLIQUE VIEW TO NORTHEAST ALONG FRONT OF SANTA ANA ...  

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

2. OBLIQUE VIEW TO NORTHEAST ALONG FRONT OF SANTA ANA RIVER DIVERSION DAM. NOTE CABLE CAR SUSPENSION CABLE AT GATE ATOP DAM. - Santa Ana River Hydroelectric System, Santa Ana River Diversion Dam, Redlands, San Bernardino County, CA

348

Section A, view of parking structure at the northeast stair ...  

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

Section A, view of parking structure at the northeast stair tower and surrounding levels, looking northwest. (BH) - World Trade Center Site, Bounded by Vesey, Church, Liberty Streets, & Route 9A, New York, New York County, NY

349

44. PIAZZA, SECOND FLOOR, LOOKING NORTHEAST. AT LEFT IS ORIGINAL ...  

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

44. PIAZZA, SECOND FLOOR, LOOKING NORTHEAST. AT LEFT IS ORIGINAL FOLDING DOOR. AT RIGHT IS ORIGINAL WINDOW (FRAME AND SASH) - Kid-Chandler House, 323 Walnut Street, Philadelphia, Philadelphia County, PA

350

View northeast of mould loft and plating cutting shop in ...  

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

View northeast of mould loft and plating cutting shop in structural assembly shop (building no. 541) - Naval Base Philadelphia-Philadelphia Naval Shipyard, Structural Assembly Shop, League Island, Philadelphia, Philadelphia County, PA

351

VIEW OF INTERIOR OF BUILDING 23, GYMNASIUM AREA, FACING NORTHEAST ...  

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

VIEW OF INTERIOR OF BUILDING 23, GYMNASIUM AREA, FACING NORTHEAST FROM SOUTHWEST CORNER - Roosevelt Base, Auditorium-Gymnasium, West Virginia Street between Richardson & Reeves Avenues, Long Beach, Los Angeles County, CA

352

READY MAGAZINE 695, ON NORTHEAST SIDE OF HANGAR 110, VIEW ...  

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

READY MAGAZINE 695, ON NORTHEAST SIDE OF HANGAR 110, VIEW FACING SOUTH-SOUTHEAST. - Naval Air Station Barbers Point, Ready Magazine-1943 Type, Adjacent to Hangars 110 & 111, on or near Midway Street, Ewa, Honolulu County, HI

353

57. POWDER MAGAZINE, DETAIL VIEW OF NORTHEAST FRONT ENTRANCE TO ...  

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

57. POWDER MAGAZINE, DETAIL VIEW OF NORTHEAST FRONT ENTRANCE TO ACESS PASSAGE TO MAGAZINES FROM INTERIOR OF MAGAZINE SHOWING VENTILATION WINDOWS (BARRED) FLANKING ENTRANCE DOOR (OPEN). NOTE ACCESS PASSAGE TO ADJOING MAGAZINE. - Fort Monroe, Fortress, Hampton, Hampton, VA

354

MAGAZINES 188, ON NORTHEAST SIDE OF HANGAR 110, VIEW FACING ...  

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

MAGAZINES 188, ON NORTHEAST SIDE OF HANGAR 110, VIEW FACING WEST-SOUTHWEST. - Naval Air Station Barbers Point, Ready Magazine-1943 Type, Adjacent to Hangars 110 & 111, on or near Midway Street, Ewa, Honolulu County, HI

355

Market power and electricity market reform in Northeast China  

E-print Network

The Northeast region of China has been used as a testing ground for creation of a functioning wholesale electric power market. We describe the ownership structure of the generation assets for those plants participating in ...

Zhang, Xiaochun

2008-01-01

356

SOUTHEAST FRONT AND NORTHEAST SIDE. Looking northwest from top of ...  

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

SOUTHEAST FRONT AND NORTHEAST SIDE. Looking northwest from top of protective berm - Edwards Air Force Base, South Base Sled Track, Water Pump Station, Area "O" at east end, northwest of fuel storage, Lancaster, Los Angeles County, CA

357

1. FRONT CORNER, LOOKING NORTHEAST, TOP HALF OF 'DUTCH DOORS' ...  

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

1. FRONT CORNER, LOOKING NORTHEAST, TOP HALF OF 'DUTCH DOORS' LEANING AGAINST FRONT WALL. - A. D. Wilcox Drift Mine, Boiler Cabin, Linda Creek near Dalton Highway, Bettles, Yukon-Koyukuk Census Area, AK

358

4. View from bridlepath looking northeast showing detail of castiron ...  

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

4. View from bridlepath looking northeast showing detail of cast-iron gothic motifs in spandrel - Central Park Bridges, Gothic Arch, Spanning bridlepath south of tennis courts at northwest edge of Reservoir, Central Park, New York, New York County, NY

359

VIEW OF BUILDING 221 (TENNIS COURTS) FROM NORTHEAST CORNER, BUILDING ...  

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

VIEW OF BUILDING 221 (TENNIS COURTS) FROM NORTHEAST CORNER, BUILDING 24 IN BACKGROUND, FACING SOUTHWEST - Roosevelt Base, Tennis Courts, Corner of Reeves Avenue & Pennsylvania Street, Long Beach, Los Angeles County, CA

360

21. VIEW OF TENNIS COURTS LOOKING NORTHEAST FROM ROOF OF ...  

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

21. VIEW OF TENNIS COURTS LOOKING NORTHEAST FROM ROOF OF BUILDING 8970 (CREW READINESS BUILDING). - Loring Air Force Base, Alert Area, Southeastern portion of base, east of southern end of runway, Limestone, Aroostook County, ME

361

8. Missile Alert Facility, northeast corner. Lyon Whiteman Air ...  

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

8. Missile Alert Facility, northeast corner. Lyon - Whiteman Air Force Base, Oscar O-1 Minuteman Missile Alert Facility, Southeast corner of Twelfth & Vendenberg Avenues, Knob Noster, Johnson County, MO

362

18. NORTHEAST CORNER OF BUILDING 8990 (MASTER SURVEILLANCE ADN CONTROL ...  

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

18. NORTHEAST CORNER OF BUILDING 8990 (MASTER SURVEILLANCE ADN CONTROL TOWER). - Loring Air Force Base, Alert Area, Southeastern portion of base, east of southern end of runway, Limestone, Aroostook County, ME

363

9. NORTHEAST SIDE ELEVATION OF BUILDING 8970 (CREW READINESS BUILDING). ...  

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

9. NORTHEAST SIDE ELEVATION OF BUILDING 8970 (CREW READINESS BUILDING). - Loring Air Force Base, Alert Area, Southeastern portion of base, east of southern end of runway, Limestone, Aroostook County, ME

364

View northeast, oblique contextual view of hoboken rail yard in ...  

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

View northeast, oblique contextual view of hoboken rail yard in immediate background, Manhattan Skyline in distance. - Delaware, Lackawanna & Western Railroad Freight & Rail Yard, Long Slip Canal, New Jersey Transit Hoboken Rail Yard, Hoboken, Hudson County, NJ

365

General view of Antenna Array and building complex, looking northeast ...  

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

General view of Antenna Array and building complex, looking northeast - Over-the-Horizon Backscatter Radar Network, Tulelake Radar Site Receive Sector Six Antenna Array, Unnamed Road West of Double Head Road, Tulelake, Siskiyou County, CA

366

1. West portal of Tunnel 25, contextual view to northeast ...  

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

1. West portal of Tunnel 25, contextual view to northeast from Tunnel 24 (HAER CA-200), 135mm lens. - Central Pacific Transcontinental Railroad, Tunnel No. 25, Milepost 133.09, Applegate, Placer County, CA

367

6. View northeast of Ten Acre Lot with Joseph Fry ...  

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

6. View northeast of Ten Acre Lot with Joseph Fry Farm complex (center) and Beehive House (right)in the background - Joseph Fry Farm Landscape, 2153 South County Trail Road (U.S. Route 2), East Greenwich, Kent County, RI

368

Northeast front, central part, with a flag hanging from the ...  

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

Northeast front, central part, with a flag hanging from the second floor balcony - Mare Island Naval Shipyard, Guard House & Barracks, Railroad Avenue near Eighteenth Street, Vallejo, Solano County, CA

369

Northeast front, looking obliquely to the northwest two story wing, ...  

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

Northeast front, looking obliquely to the northwest two story wing, view to west - Mare Island Naval Shipyard, Guard House & Barracks, Railroad Avenue near Eighteenth Street, Vallejo, Solano County, CA

370

22. Perspective view of the woodshed (1876) from the northeast, ...  

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

22. Perspective view of the woodshed (1876) from the northeast, across the meadow (less distant view). - Marsh-Billings-Rockefeller National Historical Park, 54 Elm Street, Woodstock, Windsor County, VT

371

20. Perspective view of the woodshed (1876) from the northeast, ...  

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

20. Perspective view of the woodshed (1876) from the northeast, across the meadow (more distant view). - Marsh-Billings-Rockefeller National Historical Park, 54 Elm Street, Woodstock, Windsor County, VT

372

10. View to northeast from near siphon structure showing broad, ...  

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

10. View to northeast from near siphon structure showing broad, U-shaped earthen banked ditch - Natomas Ditch System, Blue Ravine Segment, Juncture of Blue Ravine & Green Valley Roads, Folsom, Sacramento County, CA

373

6. DECK #4 TOPSIDE FROM NORTHEAST CORNER END PIECE FOR ...  

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

6. DECK #4 TOPSIDE FROM NORTHEAST CORNER END PIECE FOR ROBOTIC ARM FOR ANCHORING ASTRONAUT FOR MECHANICAL WORK. - Marshall Space Flight Center, Neutral Buoyancy Simulator Facility, Rideout Road, Huntsville, Madison County, AL

374

17. General view of dam and headworks, looking northeast. Photo ...  

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

17. General view of dam and headworks, looking northeast. Photo by Brian C. Morris, Puget Power, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

375

73. View of tunnel intake building, looking northeast. Photo by ...  

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

73. View of tunnel intake building, looking northeast. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

376

87. Detail of powerhouse and tailrace; looking northeast. Photo by ...  

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

87. Detail of powerhouse and tailrace; looking northeast. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

377

29. View of oil storage shed, looking northeast. Photo by ...  

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

29. View of oil storage shed, looking northeast. Photo by Brian C. Morris, Puget Power, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

378

2. PERSPECTIVE VIEW OF OVENS ALONG CATS RUN LOOKING NORTHEAST, ...  

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

2. PERSPECTIVE VIEW OF OVENS ALONG CATS RUN LOOKING NORTHEAST, SHOWING OVEN NOS. 159 (RIGHT) THROUGH 163 (LEFT) - Griffin No. 1 Coke Works, Along Cats Run, Southeast of Masontown Bourough (Nicholson Township), Masontown, Fayette County, PA

379

20. Detail, of tower, northeast facade, showing condition of skirt ...  

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

20. Detail, of tower, northeast facade, showing condition of skirt roof, windows, truncated chimney, dentil course, view to northwest from lift-bed truck, 65mm lens. - Southern Pacific Depot, 559 El Camino Real, San Carlos, San Mateo County, CA

380

OBLIQUE VIEW OF THE NORTHEAST SIDE. NOTE THE CANTILEVERED CANOPY ...  

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

OBLIQUE VIEW OF THE NORTHEAST SIDE. NOTE THE CANTILEVERED CANOPY OVER THE FRONT DOOR AND BELT COURSE OF THREE FLARED BANDS. VIEW FACING SOUTHEAST. - Hickam Field, Officers' Housing Type M, 113 Beard Avenue, Honolulu, Honolulu County, HI

381

Lower Pliensbachian caldera volcanism in high-obliquity rift systems in the western North Patagonian Massif, Argentina  

NASA Astrophysics Data System (ADS)

In the Cerro Carro Quebrado and Cerro Catri Cura area, located at the border between the Neuquén Basin and the North Patagonian Massif, the Garamilla Formation is composed of four volcanic stages: 1) andesitic lava-flows related to the beginning of the volcanic system; 2) basal massive lithic breccias that represent the caldera collapse; 3) voluminous, coarse-crystal rich massive lava-like ignimbrites related to multiple, steady eruptions that represent the principal infill of the system; and, finally 4) domes, dykes, lava flows, and lava domes of rhyolitic composition indicative of a post-collapse stage. The analysis of the regional and local structures, as well as, the architectures of the volcanic facies, indicates the existence of a highly oblique rift, with its principal extensional strain in an NNE-SSW direction (˜N10°). The analyzed rocks are mainly high-potassium dacites and rhyolites with trace and RE elements contents of an intraplate signature. The age of these rocks (189 ± 0.76 Ma) agree well with other volcanic sequences of the western North Patagonian Massif, as well as, the Neuquén Basin, indicating that Pliensbachian magmatism was widespread in both regions. The age is also coincident with phase 1 of volcanism of the eastern North Patagonia Massif (188-178 Ma) represented by ignimbrites, domes, and pyroclastic rocks of the Marifil Complex, related to intraplate magmatism.

Benedini, Leonardo; Gregori, Daniel; Strazzere, Leonardo; Falco, Juan I.; Dristas, Jorge A.

2014-12-01

382

Credit BG. View looking north northeast at Guard House and ...  

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

Credit BG. View looking north northeast at Guard House and entrance to Building 4505 complex. This Guard House was built in 1993 as a portable unit; it replaced an older structure. The Building 4505 complex is surrounded by a security fence. Building 4496 appears to immediate right of view - Edwards Air Force Base, North Base, Guard House, Northeast of A Street, Boron, Kern County, CA

383

Sources of relict sand on the Northeast Texas continental shelf  

E-print Network

B3 Major Subject: Oceanography SOURCES OF RELICT SAND ON THE NORTHEAST TEXAS CONTINENTAL SHELF A Thesis JEFFREY WAYNE HAWKINS Approved as to style and content by: David W. McGrail (Chairman of Committee) James Nazzll ( member ) Richard Rez... ( Nember ) Robert O. Reid (Head of Department) December 1983 AS ST PA(. f Sources ot Relict Sand on the Northeast Texas Continental shelf . ( December, 1983 ) Jeffrey Wayne Hawkins, B. A. ; Augustana College, illinois Chairman of Advisozy Committee...

Hawkins, Jeffrey Wayne

2012-06-07

384

8. GENERAL VIEW LOOKING NORTHEAST AT LANDSCAPING; THE AUDITORIUM IS ...  

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

8. GENERAL VIEW LOOKING NORTHEAST AT LANDSCAPING; THE AUDITORIUM IS BEHIND THE TREE ON FAR LEFT; POWERHOUSE #1 IS OUT OF VIEW IN THE RIGHT BACKGROUND. Photograph Nos. OR-11-9 through OR-11-37 are photocopies of photographs. Original aerial and historic photographs are located at the Bonneville Powerhouse, Bonneville, Oregon. - Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off Interstate 84, Bonneville, Multnomah County, OR

385

14. VIEW LOOKING SOUTHWEST AT THE NORTHEAST CORNER OF THE ...  

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

14. VIEW LOOKING SOUTHWEST AT THE NORTHEAST CORNER OF THE MILL. THE INCLINED TRESTLE WHICH IS CONSIDERABLE DECAYED IN THIS PHOTOGRAPH, WAS PART OF A TRAMWAY THAT LEAD FROM A MINE ADIT LOCATED NEAR WHERE THE CYANIDE PLANT WAS LOCATED , UP INTO THE DELIVERY LEVEL OF THE MILL ORE WAS CONVEYED ALONG THIS TRAM IN 125 TON ORE CARS. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

386

3. OBLIQUE VIEW OF THE MILL LOOKING NORTHEAST. THE VANNER ...  

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

3. OBLIQUE VIEW OF THE MILL LOOKING NORTHEAST. THE VANNER ROOM IS THE FORWARD MOST SECTION OF THE BUILDING. A WOOD FRAME OVER THE WELL IS VISIBLE IN THE FOREGROUND LEFT. THE BOILER ROOM IS THE ADDITION TO THE MAIN BUILDING IN THE CENTER LEFT OF THE IMAGE. THE MACHINE SHOP AND ANNEX ARE VISIBLE BEHIND THE BOILER ROOM. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

387

Brazil to help develop oil, gas in Argentina's Northeast basin  

SciTech Connect

This paper reports that Brazil and Argentina have agreed to joint exploration and development of oil and gas in Argentina's Northeast basin. Although not covered by the accord, the venture could lead to a 2,400 km, $2.5 billion gas pipeline system form the Argentine basin to southern Brazil, beyond almost $2 billion in exploration and development costs. The Northeast basin has proved reserves of 95 million bbl of crude oil and 2.1 tcf of gas.

Not Available

1992-09-28

388

Northeast Wetland Flora: Field Office Guide to Plant Species  

NSDL National Science Digital Library

The USDA Natural Resource Conservation Service's Northeast National Technical Center in Chester, Pennsylvania produced Northeast Wetland Flora: Field Office Guide to Plant Species. The guide contains black and white illustrations, full species descriptions (with color photographs, illustrations, and small distribution maps), illustrated glossaries, an alphabetical species list (provides common and scientific names for 300 species of vascular plants), and a key to generalized plant groups. The guide may be browsed online or downloaded in .zip format.

389

Forecasting the probability of forest fires in Northeast Texas  

E-print Network

FORECASTING THE PROBABILITY OF FOREST FIRES IN NORTHEAST TEXAS A Thesis by STUART ALLEN WADLEIGH Submit ted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1972 Major Subject: Meteorology FORECASTING THE PROBABILITY OF FOREST FIRES IN NORTHEAST TEXAS A Thesis by STUART ALLEN WADLEIGH Approved as to style and content by: ( irman of ee) (Head of Depar nt) (Member) (Member) December 1972 c...

Wadleigh, Stuart Allen

2012-06-07

390

Geochronology and geochemistry of late Paleozoic volcanic rocks on the western margin of the Songnen-Zhangguangcai Range Massif, NE China: Implications for the amalgamation history of the Xing'an and Songnen-Zhangguangcai Range massifs  

NASA Astrophysics Data System (ADS)

We here elucidate the tectonic evolution of the Xing'an and Songnen-Zhangguangcai Range massifs during the early Carboniferous-early Permian, based on zircon U-Pb dating and whole-rock geochemical analyses of volcanic rocks of the Songnen-Zhangguangcai Range Massif in the Sunwu area, Heilongjiang Province, NE China. Euhedral-subeuhedral zircons from three rhyolites and one dacite from the study area display fine-scale oscillatory growth zoning, indicating a magmatic origin. Zircon U-Pb dating by LA-ICP-MS indicates that these acidic volcanic rocks formed in the early Carboniferous-early Permian; i.e., early Carboniferous (~ 351 Ma), early late Carboniferous (~ 319 Ma), and early Permian (295-293 Ma). The early Carboniferous rhyolites exhibit chemical affinities to A-type rhyolites, implying an extensional environment. Their positive ?Hf(t) values (+ 8.67 to + 13.4 except for one spot of + 1.63) and Hf two-stage model ages (TDM2 = 562-988 Ma) indicate that the primary magma was possibly derived from partial melting of newly accreted continental crust. The early late Carboniferous rhyolites and dacites (~ 319 Ma) exhibit calc-alkaline peraluminous signature [molar Al2O3/(CaO + K2O + Na2O) ratio, or A/CNK = 1.04-1.22]. The ?Hf(t) values and TDM2 ages of zircons from the 319 Ma dacites are in the range of + 5.33 to + 9.32 and 907-1268 Ma, respectively, suggesting that the primary magma was derived from partial melting of newly accreted crust. The early Permian rhyolites (295-293 Ma) show chemical affinities to A-type rhyolites, implying an extensional tectonic environment; their positive ?Hf(t) values (+ 8.82 to + 13.8) and Hf two-stage model ages (484-743 Ma) indicate that the primary magma was derived from partial melting of newly accreted crust. Combined with the geochemical features of coeval igneous rocks from the eastern margin of the Xing'an Massif, these data reveal the late Paleozoic tectonic history and relationships of the Xing'an and Songnen-Zhangguangcai Range massifs, i.e., early Carboniferous westward subduction of the Paleo-Asian oceanic plate beneath the Xing'an Massif, followed by early late Carboniferous collision and amalgamation of microcontinental blocks, and early Permian post-collisional extension.

Li, Yu; Xu, Wen-Liang; Wang, Feng; Tang, Jie; Pei, Fu-Ping; Wang, Zi-Jin

2014-09-01

391

Timing and tectonic history of UHP rocks from the Rhodope Massif, Bulgaria  

NASA Astrophysics Data System (ADS)

Microdiamond inclusions in garnet delineate the Rhodope Massif (RM) as a globally important UHP locality. To date there are 4 confirmed UHP localities across the RM, with UHP indicators being restricted to garnets from metapelites. All available protolith and metamorphic ages from the RM are based on accessory minerals such as zircon and monazite, which yield a disparate array of ages spanning from pre-Variscan to post-Alpine (Eocene) times. The best estimate for the timing of the UHP event is that it was associated with a subduction event during the Jurassic1. This study focuses on garnets from UHP metapelites from the Central Rhodope Mts., Bulgaria, in the vicinity of the town of Chepelare. It is the first to date directly the host of the UHP indicators in the region, eliminating the risks of interpretations based on inherited inclusions. Aggregates of garnets have been dated via Sm/Nd geochronology, following a rigorous sample preparation and partial dissolution process to remove the effect of REE rich inclusions that result in low Sm/Nd ratios. Aggregate garnet ages range between 91.5 ± 4.6 Ma and 70.3 ± 2.3 Ma, which correlates well with the age of magmatic activity seen across the region. These Late Cretaceous ages are significantly younger than the proposed Jurassic UHP metamorphic event, but correlate well with another proposed (U)HP event, based on U-Pb zircon dating2. Current tectonic models for the RM invoke either a protracted subduction cycle with a single, long lasting (>30Ma long) exhumation event, or a series of complex subduction -exhumation cycles preserved in multiple suture zones. We will attempt to link our new garnet Sm/Nd ages with the complex post-Jurassic tectonic evolution of the RM, and in particular add constraints to the much debated questions surrounding the nature of the exhumation of the UHP units and the evolution of the massif. 1Burg, J., 2011, Journal of the Virtual Explorer, 42, paper 1 2Liati, A.,et al., 2011,. In Dobrzhinetskaya, L. and Cuthbert, S.(Editors), Ultrahigh Pressure Metamorphism. Elsevier, London, pp. 295-324.

Collings, David; Savov, Ivan; Eccles, Kathryn; Baxter, Ethan; Harvey, Jason

2013-04-01

392

Sulfur mineralogy and geochemistry of serpentinites and gabbros of the Atlantis Massif (IODP Site U1309)  

NASA Astrophysics Data System (ADS)

In-situ uplifted portions of oceanic crust at the central dome of the Atlantis Massif (Mid-Atlantic Ridge, 30°N) were drilled during Expeditions 304 and 305 of the Integrated Ocean Drilling Program (IODP) and a 1.4 km section of predominantly gabbroic rocks with minor intercalated ultramafic rocks were recovered. Here we characterize variations in sulfur mineralogy and geochemistry of selected samples of serpentinized peridotites, olivine-rich troctolites and diverse gabbroic rocks recovered from Hole 1309D. These data are used to constrain alteration processes and redox conditions and are compared with the basement rocks of the southern wall of the Atlantis Massif, which hosts the Lost City Hydrothermal Field, 5 km to the south. The oceanic crust at the central dome is characterized by Ni-rich sulfides reflecting reducing conditions and limited seawater circulation. During uplift and exhumation, seawater interaction in gabbroic-dominated domains was limited, as indicated by homogeneous mantle-like sulfur contents and isotope compositions of gabbroic rocks and olivine-rich troctolites. Local variations from mantle compositions are related to magmatic variability or to interaction with seawater-derived fluids channeled along fault zones. The concomitant occurrence of mackinawite in olivine-rich troctolites and an anhydrite vein in a gabbro provide temperature constraints of 150-200 °C for late circulating fluids along local brittle faults below 700 m depth. In contrast, the ultramafic lithologies at the central dome represent domains with higher seawater fluxes and higher degrees of alteration and show distinct changes in sulfur geochemistry. The serpentinites in the upper part of the hole are characterized by high total sulfide contents, high ?34S sulfide values and low ?34S sulfate values, which reflect a multistage history primarily controlled by seawater-gabbro interaction and subsequent serpentinization. The basement rocks at the central dome record lower oxygen fugacities and more limited fluid fluxes compared with the serpentinites and gabbros of the Lost City hydrothermal system. Our studies are consistent with previous results and indicate that sulfur speciation and sulfur isotope compositions of altered oceanic mantle sequences commonly evolve over time. Heterogeneities in sulfur geochemistry reflect the fact that serpentinites are highly sensitive to local variations in fluid fluxes, temperature, oxygen and sulfur fugacities, and microbial activity.

Delacour, Adélie; Früh-Green, Gretchen L.; Bernasconi, Stefano M.

2008-10-01

393

Collapse in a rock massif induced by lateral confinement loss: the case of Montegolf (Málaga, Spain)  

NASA Astrophysics Data System (ADS)

The use of computing codes allowing finite elements analysis is a very useful tool in detecting variations of the tensional state of rock massifs. Most of the codes used for ground modelling only allow 2D analysis. However, in the case of complex slope instabilities, it is necessary to consider the variation of resistant properties in a 3D model. This work presents an example in which 3D analysis carried out by finite elements methods becomes essential to understand the surface processes occurred in a urbanized rock massif (Montegolf, Malaga). The studied area is a small hill of elliptical shaped plan (300x200m plan). As a main peculiarity of this hill, it was intensively undergone to human activity in recent years. On September 11th, 2000, the collapse of an inner cavity (100m3 in volume) took place. The cavity proceeded from a mining abandoned 30 years before. The application of a 3D finite elements model showed that the highway slope digged in the Eastern face of the mount produced a change in the tensional state inside the mount. Vertical stresses shifted from compression to tension eliminating the vault effect. To define the geometry of the model, a survey of the existing contour map was carried out and conveniently transformed into ACIS format to be processed by ABAQUS (finite elements program). In the two-dimensional case an E-W section involving houses, highway and cavity was chosen. Mining hole was considered in the model, using a 10m-diameter sphere to represent the cavity. The performance of the natural materials was supposed to be elastic so Young modulus and Poisson's ratio were required. The ground strains due to collapse of the cavity and obtained by the finite elements model were accurately related to the mapping of cracks on the surface, the sinking of topographical landmarks (located on the top of the mountain) and the photographic analysis (captures before and after the collapse). Thus it is confirmed that the surface sliding which affected the residential house Montegolf was caused by the collapse of a cavity inside the mount. 3D models confirmed that the highway slope digged on the mount and the subsequent instabilities in that slope were the main conditioning factors of this collapse.

Azañón, J. M.; Puertas, E.; Ureña, C.; Gallego, R.; Romero-Gómez, F.

2012-04-01

394

CELEBRATION 2000: P-wave velocity models of the Bohemian Massif  

NASA Astrophysics Data System (ADS)

Deep structure of the Bohemian Massif (BM), the largest stable outcrop of Variscan rocks in Central Europe, was studied along two refraction profiles, CEL09 that traverses the whole massif in the NW-SE direction, and CEL10 that extends along its eastern edge almost perpendicularly to CEL09. Good quality recordings with clear first arrivals of crustal and upper mantle phases show apparent velocity 5.9 km/s for the upper crust with slightly higher gradient in NW part of the BM and app. velocity 8.0 to 8.1 km/s for the upper mantle. Decrease of amplitudes of crustal phases visible in some sections may be connected with a specific upper crustal structure (zero to negative velocity gradient zone). Pronounced Moho reflections in central part of the BM suggest well-defined Moho in that part and not so clear Moho with smaller velocity contrast in other parts of the BM. For interpretation, the tomographic inversion routine of Hole (1992) was used as an efficient tool to determine seismic P-wave velocity distribution in the crust using first arrivals. Tomographic models were verified by forward ray tracing modelling based on well-established algorithm developed by Cerveny et al. (1983), where apart from first arrivals also further phases were included. 2-D velocity models of first arrivals and reflected phases show high P-wave velocity gradient zone reaching the depth of 5-7 km followed by small gradient and laterally homogeneous P-wave velocity distribution in the middle crust. Differences in velocity distribution in the lower crust delimit central part of the BM (sharp Moho discontinuity) from other tectonic units within the BM (lower crust high gradient transition zone). Position of Moho discontinuity ranging from 32 km to 40 km and reflectors within the crust complement the P-wave velocity distribution. Presented models also show the contact of the BM with its neighbouring units - Carpathians, Paleozoic Platform, Vienna Basin and the Alps. References: Cerveny, V., Psencik, I., 1983. Program SEIS83, Numerical Modelling of Seismic Wave Fields in 2-D Laterally Varying Layered Structures by the Ray Method, Charles University, Prague. Hole, J.A. 1992: Non-linear high-resolution three-dimensional seismic travel time tomography, J. Geophys. Res. 97, 6553-6562.

Hrubcova, P.

2003-04-01

395

Experimental constraints on ultrapotassic magmatism from the Bohemian Massif (durbachite series, Czech Republic)  

NASA Astrophysics Data System (ADS)

The equilibrium phase relations of a mafic durbachite (53 wt.% SiO2) from the T?ebí? pluton, representative of the Variscan ultrapotassic magmatism of the Bohemian Massif (338-335 Ma), have been determined as a function of temperature (900-1,100°C), pressure (100-200 MPa), and H2O activity (1.1-6.1 wt.% H2O in the melt). Two oxygen fugacity ranges were investigated: close to the Ni-NiO (NNO) buffer and 2.6 log unit above NNO buffer (?NNO + 2.6). At 1,100°C, olivine is the liquidus phase and co-crystallized with phlogopite and augite at 1,000°C for the whole range of investigated pressure and water content in the melt. At 900°C, the mineral assemblage consists of augite and phlogopite, whereas olivine is not stable. The stability field of both alkali feldspar and plagioclase is restricted to low pressure (100 MPa) at nearly water-saturated conditions (<3-4 wt.% H2O) and T < 900°C. A comparison between experimental products and natural minerals indicates that mafic durbachites have a near-liquidus assemblage of olivine, augite, Ti-rich phlogopite, apatite and zircon, followed by alkali feldspar and plagioclase, similar to the mineral assemblage of minette magma. Natural amphibole, diopside and orthopyroxene were not reproduced experimentally and probably result from sub-solidus reactions, whereas biotite re-equilibrated at low temperature. The crystallization sequence olivine followed by phlogopite and augite reproduces the sequence inferred in many mica-lamprophyre rocks. The similar fractionation trends observed for durbachites and minettes indicate that mafic durbachites are probably the plutonic equivalents of minettes and that K- and Mg-rich magmas in the Bohemian Massif may have been generated from partial melting of a phlogopite-clinopyroxene-bearing metasomatized peridotite. Experimental melt compositions also suggest that felsic durbachites can be generated by simple fractionation of a more mafic parent and mixing with mantle-derived components at mid crustal pressures.

Parat, Fleurice; Holtz, François; René, Miloš; Almeev, Renat

2010-03-01

396

Internal structure of the Aar Massif: What can we learn in terms of exploration for deep geothermal energy?  

NASA Astrophysics Data System (ADS)

The successful use of deep geothermal energy requires 3D flow paths, which allow an efficient heat exchange between the surrounding host rocks and the circulating fluids. Recent attempts to exploit this energy resource clearly demonstrate that the new technology is facing sever problems. Some major problems are related to the prediction of permeability, the 3D structure of the flow paths and the mechanical responses during elevated fluid pressures at depths of several kilometers. Although seemingly new in a technical perspective, nature is facing and solving similar problems since the beginning of the Alpine orogeny. Based on detailed studies in the Hasli Valley (Aar Massif) we can demonstrate that deformation and fluid flow are strongly localized along mechanical anisotropies (e.g. lithological variations, brittle and ductile faults). Some of them already evolved during Variscan and post-Variscan times. Interestingly, these inherited structures are reactivated over and over again during the Alpine orogeny. Their reactivation occurred at depths of ~13-15 km with elevated temperatures (400-475°C) and involved both ductile and brittle deformation processes. Brittle deformation in form of hydrofracking was always present due to the circulating fluids. It is this process, which was and still is responsible for seismic activity. With progressive uplift and exhumation of the Aar Massif, ductile deformation structures became replaced by brittle cataclasites and fault gouges during fault activity at shallower crustal levels. Existing hydrotest data from the Grimsel Test Site (Nagra's underground research laboratory) indicate that these brittle successors of the ductile shear zones are domains of enhanced recent fluid percolation. Note that although being exposed today, the continuation of these fault structures are still active at depth in both brittle and ductile deformation modes, a fact that can be inferred from recent uplift rates and the active seismicity. On the scale of the Aar Massif, the aforementioned deformation sequence induced a complex and dense network of large-scale fault zones. The 3D structure of this network and the associated spacing between the individual faults strongly depends on the type of host rock, intensity of background strain and the location (kinematics) within the massif. Similar effects have to be expected in the crystalline rocks underneath the sedimentary cover in Northern Switzerland. However, based on the aforementioned findings, several facts might be in favor for future exploration of deep geothermal energy in the Aar Massif: (i) enhanced permeability in brittle fault rocks, (ii) dense 3D network auf brittle faults, (iii) weak vegetation allows a reliable projection of the structures to depth as well as tracking of their lateral continuation (crucial for estimates on seismic potential) and last but not least the existence of an elevated geothermal gradient.

Herwegh, Marco; Baumberger, Roland; Wehrens, Philip; Schubert, Raphael; Berger, Alfons; Maeder, Urs; Spillmann, Thomas

2014-05-01

397

Microstructural Observations of an `Oceanic Core Complex': Atlantis Massif, 30oN, mid-Atlantic Ridge  

NASA Astrophysics Data System (ADS)

The domal high of Atlantis Massif, an inside-corner high at 30oN on the mid-Atlantic Ridge, is presumed to be the footwall of a major slip detachment fault system. Deformation textures in samples of gabbro and peridotite collected from the massif follow a down-temperature path in which high-temperature strain fabrics are overprinted by progressively lower temperature deformation, consistent with unroofing of the massif during progressive normal faulting. Locally preserved granulite facies strain fabrics, most common in the upper 1500m of the massif, include dynamically recrystallized olivine that delineate the early history of normal faulting. Hydrous, amphibolite facies deformation and metasomatic veins of amphibole schist commonly overprint granulite textures in peridotite. Pyroxene was metamorphosed in shear zones to form fine-grained schist composed of strain-free, pale-brown hornblende rimmed and/or overgrown by tremolite. These amphiboles have a strong preferred orientation (SPO and CPO), and are aligned parallel to vein walls. Rimming and overgrowth of hornblende by tremolite indicates deformation continued as temperatures dropped from amphibolite to greenschist conditions. Transitional brittle/plastic and cataclastic fabrics occur at variable depths, but are most common in the upper part of the massif. A 0.5 to 1 meter thick deposit of moderately- to well-indurated carbonate deposited as calcareous ooze and containing fauna of pteropods, foraminifera, and coccoliths unconformably overlies these footwall rocks. This deposit was cemented by precipitation of aragonite in pore space and/or recrystallization of biologic material composed of aragonite to crystalline sparite. Precipitation and recrystallization of aragonite resulted from serpentinization-derived fluids percolating diffusely through the sediment column. Crosscutting, filled fractures suggest that calcareous ooze infiltrated joints and active faults in footwall rocks and prior lithified carbonate, and were involved in continued deformation. Recrystallized, lithified ooze deformed concurrently with tremolite and talc growth in zones of carbonate-tremolite-talc schist, and/or is the matrix of cohesive fault breccias. These relations suggest that core complex faulting was concurrent with deposition and lithification of the carbonate. Serpentinization and faulting therefore continued after footwall rocks were unroofed and exposed at the seafloor.

Schroeder, T.; John, B. E.; Kelley, D.

2001-12-01

398

Palaeomagnetic constraints on the evolution of the Atlantis Massif oceanic core complex (Mid-Atlantic Ridge, 30°N)  

NASA Astrophysics Data System (ADS)

Oceanic core complexes expose lower crustal and upper mantle rocks on the seafloor by tectonic unroofing in the footwalls of large-slip detachment faults. They represent a fundamental component of the seafloor spreading system at slow and ultraslow axes. One of the most extensively studied oceanic core complexes is Atlantis Massif, located at 30°N at the intersection of the Atlantis Transform Fault and the Mid Atlantic Ridge (MAR). The central dome of the massif exposes the corrugated detachment fault surface and was drilled during IODP Expedition 304/305 (Hole U1309D). This sampled a 1.4 km faulted and complexly layered footwall section dominated by gabbroic lithologies with minor ultramafic rocks. Palaeomagnetic analyses demonstrate that the gabbroic sequences at Atlantis Massif carry highly stable remanent magnetizations that provide valuable information on the evolution of the section. Thermal demagnetization experiments recover high unblocking temperature components of reversed polarity (R1) throughout the gabbroic sequences. Correlation of structures observed on oriented borehole (FMS) images and those recorded on unoriented core pieces allows reorientation of R1 remanences. The mean remanence direction in true geographic coordinates constrains the tectonic rotation experienced by the Atlantis Massif footwall, indicating a 46°±6° counterclockwise around a MAR-parallel horizontal axis trending 011°±6°. The detachment fault therefore initiated at a steep dip of >50° and then rotated flexurally to its present day low angle geometry (consistent with a 'rolling-hinge' model for detachment evolution). In a number of intervals, the gabbros exhibit a complex remanence structure with the presence of additional intermediate temperature normal (N1) and lower temperature reversed (R2) polarity components, suggesting an extended period of remanence acquisition during different polarity intervals. Sharp break-points between different polarity components suggest that they were acquired by a thermal mechanism. There appears to be no correlation between remanence structure and either the igneous stratigraphy or the distribution of alteration in the core. Instead, the remanence data are consistent with a model in which the lower crustal section acquired magnetizations of different polarity during a protracted cooling history spanning two geomagnetic reversals. The crystallization age of the section (1.2 Ma; derived from Pb/U zircon dating) suggests that the R1 component was acquired during geomagnetic polarity chron C1r.2r, N1 during chron C1r.1n (Jaramillo) and R2 during chron C1r.1r. By considering the maximum time intervals available for acquisition of the N1 and R2 components and correcting laboratory unblocking temperatures accordingly, the data provide additional constraints on the thermal evolution of the Atlantis Massif footwall.

Morris, A.; Pressling, N.; Gee, J. S.

2012-04-01

399

Palaeomagnetic constraints on the evolution of the Atlantis Massif oceanic core complex (Mid-Atlantic Ridge, 30°N)  

NASA Astrophysics Data System (ADS)

Oceanic core complexes expose lower crustal and upper mantle rocks on the seafloor by tectonic unroofing in the footwalls of large-slip detachment faults. They represent a fundamental component of the seafloor spreading system at slow and ultraslow axes. One of the most extensively studied oceanic core complexes is Atlantis Massif, located at 30°N at the intersection of the Atlantis Transform Fault and the Mid Atlantic Ridge (MAR). The central dome of the massif exposes the corrugated detachment fault surface and was drilled during IODP Expedition 304/305 (Hole U1309D). This sampled a 1.4 km faulted and complexly layered footwall section dominated by gabbroic lithologies with minor ultramafic rocks. Palaeomagnetic analyses demonstrate that the gabbroic sequences at Atlantis Massif carry highly stable remanent magnetizations that provide valuable information on the evolution of the section. Thermal demagnetization experiments recover high unblocking temperature components of reversed polarity (R1) throughout the gabbroic sequences. Correlation of structures observed on oriented borehole (FMS) images and those recorded on unoriented core pieces allows reorientation of R1 remanences. The mean remanence direction in true geographic coordinates constrains the tectonic rotation experienced by the Atlantis Massif footwall, indicating a 46°±6° counterclockwise around a MAR-parallel horizontal axis trending 011°±6°. The detachment fault therefore initiated at a steep dip of >50° and then rotated flexurally to its present day low angle geometry (consistent with a 'rolling-hinge' model for detachment evolution). In a number of intervals, the gabbros exhibit a complex remanence structure with the presence of additional intermediate temperature normal (N1) and lower temperature reversed (R2) polarity components, suggesting an extended period of remanence acquisition during different polarity intervals. Sharp break-points between different polarity components suggest that they were acquired by a thermal mechanism. There appears to be no correlation between remanence structure and either the igneous stratigraphy or the distribution of alteration in the core. Instead, the remanence data are consistent with a model in which the lower crustal section acquired magnetizations of different polarity during a protracted cooling history spanning two geomagnetic reversals. The crystallization age of the section (1.2 Ma; derived from Pb/U zircon dating) suggests that the R1 component was acquired during geomagnetic polarity chron C1r.2r, N1 during chron C1r.1n (Jaramillo) and R2 during chron C1r.1r. By considering the maximum time intervals available for acquisition of the N1 and R2 components and correcting laboratory unblocking temperatures accordingly, the data provide additional constraints on the thermal evolution of the Atlantis Massif footwall.

Morris, A.; Pressling, N.; Gee, J. S.

2011-12-01

400

Formation of clay minerals and exhumation of lower-crustal rocks at Atlantis Massif, Mid-Atlantic Ridge  

NASA Astrophysics Data System (ADS)

Low-temperature alteration products in gabbros from the ocean floor have significant implications for incipient processes of seawater-rock interaction and exhumation tectonics of the lower-crustal rocks. In this paper we report mode of occurrence and mineralogical characteristics of clay minerals in gabbroic rocks recovered from Integrated Ocean Drilling Program (IODP) Hole U1309D at an oceanic core complex, Atlantis Massif, Mid-Atlantic Ridge at 30°N. The clay minerals were identified by optical microscope, electron microprobe, Raman spectrometer, and transmission electron microscope as mainly composed of mixed-layer saponite-talc, saponite, and vermiculite. They are characteristically rich in iron that is significantly oxidized and distributed into the tetrahedral site, suggesting a relatively high-temperature condition for oxidation. They are restricted to domains near the contacts between olivine and talc or form pseudomorphs after olivine near microcracks filled with zeolite or clay minerals. These facts suggest the infiltration of oxidative seawater and reactions to variable fluid/rock ratios at variable temperatures. Close association of vermiculite with microcracks radiated from serpentinized olivine suggests that the deep infiltration of seawater at an off-axis region was caused by fracturing resulting from serpentinization and enhanced by relatively abundant olivine-rich lithology at Atlantis Massif. Compared with gabbroic rocks of an oceanic core complex at ultraslow-spreading ridge (ODP Hole 735B), those of Atlantis Massif substantially lack mixed-layer smectite-chlorite. Mixed-layer smectite-chlorite is a product of prehnite-actinolite to greenschist facies alteration and looks to preserve a record of ambient thermal structure through which the massif passed on rising to a shallow level. The absence of pervasive formation of mixed-layer smectite-chlorite under relatively reducing conditions suggests low permeability and/or limited fluid-rock reactions on the way to shallow levels. From the observation and consideration of the characteristics of clay minerals, sequence and distribution of static alteration related to fracturing, original lithology, and tectonic settings of the oceanic core complexes, we conclude that Atlantis Massif was more rapidly exhumed to the oxidative subseafloor environment than Atlantis Bank. The difference of exhumation rate possibly reflected either the disparity in spreading rate between the whole ridge systems or regional variation of exhumation tectonics between the two oceanic core complexes.

Nozaka, Toshio; Fryer, Patricia; Andreani, Muriel

2008-11-01

401

The limnology and biology of the Dufek Massif, Transantarctic Mountains 82° South  

NASA Astrophysics Data System (ADS)

Very little is known about the higher latitude inland biology of continental Antarctica. In this paper we describe the limnology and biology of the Dufek Massif, using a range of observational, microscopic and molecular methods. Here two dry valleys are home to some of the southernmost biota on Earth. Cyanobacteria were the dominant life forms, being found in lakes and ponds, in hypersaline brines, summer melt water, relict pond beds and in exposed terrestrial habitats. Their species diversity was the lowest yet observed in Antarctic lakes. Green algae, cercozoa and bacteria were present, but diatoms were absent except for a single valve; likely windblown. Mosses were absent and only one lichen specimen was found. The Metazoa included three microbivorous tardigrades ( Acutuncus antarcticus, Diphascon sanae and Echiniscus (cf) pseudowendti) and bdelloid rotifer species, but no arthropods or nematodes. These simple faunal and floral communities are missing most of the elements normally present at lower latitudes in the Antarctic which is probably a result of the very harsh environmental conditions in the area.

Hodgson, Dominic A.; Convey, Peter; Verleyen, Elie; Vyverman, Wim; McInnes, Sandra J.; Sands, Chester J.; Fernández-Carazo, Rafael; Wilmotte, Annick; De Wever, Aaike; Peeters, Karolien; Tavernier, Ines; Willems, Anne

2010-08-01

402

Time scales of regional circulation of saline fluids in continental aquifers (Armorican massif, Western France)  

NASA Astrophysics Data System (ADS)

In recent decades, saline fluids have been sampled worldwide at great depths in continental basements. Although some of them have been attributed to marine transgressions the mechanisms allowing their circulation is not understood. In this paper, we describe the horizontal and vertical distribution of moderately saline fluids (60 to 1400 mg L-1) sampled at depths ranging from 41 to 200 m in aquifers at the regional scale of the Armorican Massif (northwestern France). The horizontal and vertical distributions of high chloride concentrations are in good agreement with both the altitudinal and vertical limits and succession of the three major transgressions between the Mio-Pliocene and Pleistocene ages. The mean chloride concentration for each transgression area is exponentially related to the time spanned until present. It defines the potential laws of leaching of marine waters by fresh meteoric waters. The results of the Armorican aquifers provide the first observed constraints for the time scales of seawater circulation in the continental basement and the subsequent leaching by fresh meteoric waters. The general trend of increasing chloride concentration with depth and the time frame for the flushing process provide useful information to develop conceptual models of the paleo-functionning of Armorican aquifers.

Armandine Les Landes, A.; Aquilina, L.; Davy, P.; Vergnaud, V.; le Carlier, C.

2014-06-01

403

Adjusting stream-sediment geochemical maps in the Austrian Bohemian Massif by analysis of variance  

USGS Publications Warehouse

The Austrian portion of the Bohemian Massif is a Precambrian terrane composed mostly of highly metamorphosed rocks intruded by a series of granitoids that are petrographically similar. Rocks are exposed poorly and the subtle variations in rock type are difficult to map in the field. A detailed geochemical survey of stream sediments in this region has been conducted and included as part of the Geochemischer Atlas der Republik O??sterreich, and the variations in stream sediment composition may help refine the geological interpretation. In an earlier study, multivariate analysis of variance (MANOVA) was applied to the stream-sediment data in order to minimize unwanted sampling variation and emphasize relationships between stream sediments and rock types in sample catchment areas. The estimated coefficients were used successfully to correct for the sampling effects throughout most of the region, but also introduced an overcorrection in some areas that seems to result from consistent but subtle differences in composition of specific rock types. By expanding the model to include an additional factor reflecting the presence of a major tectonic unit, the Rohrbach block, the overcorrection is removed. This iterative process simultaneously refines both the geochemical map by removing extraneous variation and the geological map by suggesting a more detailed classification of rock types. ?? 1995 International Association for Mathematical Geology.

Davis, J.C.; Hausberger, G.; Schermann, O.; Bohling, G.

1995-01-01

404

Lithologic Distribution and Geologic History of the Apollo 17 Site: The Record in Soils and Small Rock Particles from the Highland Massifs  

NASA Technical Reports Server (NTRS)

Through analysis by instrumental neutron activation (INAA) of 789 individual lithic fragments from the 2 mm-4 mm grain-size fractions of five Apollo 17 soil samples (72443, 72503, 73243, 76283, and 76503) and petrographic examination of a subset, we have determined the diversity and proportions of rock types recorded within soils from the highland massifs. The distribution of rock types at the site, as recorded by lithic fragments in the soils, is an alternative to the distribution inferred from the limited number of large rock samples. The compositions and proportions of 2 mm-4 mm fragments provide a bridge between compositions of less than 1 mm fines and types and proportions of rocks observed in large collected breccias and their clasts. The 2 mm-4 mm fraction of soil from South Massif, represented by an unbiased set of lithic fragments from station-2 samples 72443 and 72503, consists of 71% noritic impact-melt breccia, 7% Incompatible-Trace-Element-(ITE)-poor highland rock types (mainly granulitic breccias), 19% agglutinates and regolith breccias, 1% high-Ti mare basalt, and 2% others (very-low-Ti (VLT) basalt, monzogabbro breccia, and metal). In contrast, the 2 mm - 4 mm fraction of a soil from the North Massif, represented by an unbiased set of lithic fragments from station-6 sample 76503, has a greater proportion of ITE-poor highland rock types and mare-basalt fragments: it consists of 29% ITE-poor highland rock types (mainly granulitic breccias and troctolitic anorthosite), 25% impact-melt breccia, 13% high-Ti mare basalt, 31 % agglutinates and regolith breccias, 1% orange glass and related breccia, and 1% others. Based on a comparison of mass- weighted mean compositions of the lithic fragments with compositions of soil fines from all Apollo 17 highland stations, differences between the station-2 and station-6 samples are representative of differences between available samples from the two massifs. From the distribution of different rock types and their compositions, we conclude the following: (1) North-Massif and South-Massif soil samples differ significantly in types and proportions of ITE-poor highland components and ITE-rich impact-melt-breccia components. These differences reflect crudely layered massifs and known local geology. The greater percentage of impact-melt breccia in the South- Massif light-mantle soil stems from derivation of the light mantle from the top of the massif, which apparently is richer in noritic impact-melt breccia than are lower parts of the massifs. (2) At station 2, the 2 mm-4 mm grain-size fraction is enriched in impact-melt breccias compared to the less than 1 mm fraction, suggesting that the <1 mm fraction within the light mantle has a greater proportion of lithologies such as granulitic breccias which are more prevalent lower in the massifs and which we infer to be older (pre-basin) highland components. (3) Soil from station 6, North Massif, contains magnesian troctolitic anorthosite, which is a component that is rare in station-2 South-Massif,contains magnesian troctolitic in impact-melt breccia interpreted by most investigators to be ejecta from the Serenitatis basin.

Jolliff, Bradley L.; Rockow, Kaylynn M.; Korotev, Randy L.; Haskin, Larry A.

1996-01-01

405

Carbonate platform development in northeast Australia  

SciTech Connect

In northeast Australia, the Great Barrier Reef and the Queensland and Marion plateaus comprise carbonate platforms separated by major rift basins. Cenozoic platform evolution has been dependent upon (1) northward drift of Australia from temperate into tropical latitudes; (2) subsidence pulses in the Eocene/Oligocene and the Pliocene/Pleistocene; (3) sea level oscillations; (4) continental and oceanic influences; and (5) paleophysiography and paleo-ocean chemistry. The evolution of each platform reflects the interaction of these factors on its development. Further, the evolution of the Queensland Plateau has markedly affected that of the Great Barrier Reef through its influence on circulation patterns. In the Eocene/Oligocene, and shelf on which the Great Barrier Reef grew protected the Marion Plateau from terrigenous influences, while in the late Miocene to early Pliocene the Marion Plateau formed the springboard from which the central and southern Great Barrier Reef developed. Models of platform development must take account of 1)early Eocene reef initiation on the Queensland Plateau concomitant with marine transgression into the adjacent rift troughs; 2)Eocene/Oligocene subsidence resulting in stepback of the reefs from the flank of the Queensland Plateau and reestablishment at higher bathymetric levels, concomitant clastic sedimentation along the tropical northern continental margin and temperate(.) carbonate progradation along the margin of the Marion Plateau; 3)extensive growth of Miocene reef complexes on the Queensland Plateau and the initiation of reef complexes on the Marion Plateau and on the northern section of the Great Barrier Reef; and 4)Pliocene subsidence leading to contraction of the area of reef growth on the Queensland Plateau, with almost total drowning of the Marion Plateau and stepback of the Miocene barrier and platform reefs to their present position on the central Great Barrier Reef.

Davies, P.J.; Symonds, P.A.; Feary, D.A.; Pigram, C.J.

1987-05-01

406

Large and great earthquakes in the Shillong plateau-Assam valley area of Northeast India Region: Pop-up and transverse tectonics  

NASA Astrophysics Data System (ADS)

The tectonic model of the Shillong plateau and Assam valley in the northeast India region, the source area for the 1897 great earthquake (Ms ~ 8.7) and for the four (1869, 1923, 1930 and 1943) large earthquakes (M. ? 7.0), is examined using the high precision data of a 20-station broadband seismic network. About 300 selected earthquakes M ? 3.0 recorded during 2001-2009 are analysed to study the seismicity and fault plane solutions. The dominating thrust/reverse faulting earthquakes in the western plateau may be explained by the proposed pop-up tectonics between two active boundary faults, the Oldham-Brahmaputra fault to the north and the Dapsi-Dauki thrust to the south, though the northern boundary fault is debated. The more intense normal and strike-slip faulting earthquakes in the eastern plateau (Mikir massif) and in the Assam valley, on the other hand, are well explained by transverse tectonics at the long and deep rooted Kopili fault that cuts across the Himalaya and caused the 2009 Bhutan earthquake (Mw 6.3). It is conjectured that the complex tectonics of the Shillong plateau and transverse tectonics at the Kopili fault make the region vulnerable for impending large earthquake(s).

Kayal, J. R.; Arefiev, S. S.; Baruah, Saurabh; Hazarika, D.; Gogoi, N.; Gautam, J. L.; Baruah, Santanu; Dorbath, C.; Tatevossian, R.

2012-04-01

407

Pollution Aerosol in the Northeast: Northeastern-Midwestern Contributions  

NASA Astrophysics Data System (ADS)

In recent years, atmospheric scientists have been endeavoring to determine the relative contributions of local and distant sources to pollution aerosol in eastern North America. Elemental analysis of aerosol from various sites in the northeastern United States has revealed a persistent northeastern ``foreground'' upon which pulses of midwestern aerosol are superimposed every few days, in response to large-scale meteorological features. Regional apportionment of tracer elements and sulfate in summer and winter samples from Narragansett, Rhode Island, and Underhill, Vermont, shows that most of the elements come predominantly from northeastern sources. Notable exceptions include arsenic and indium, for which Canadian nonferrous smelters are important sources, and sulfur and selenium, for which the Midwest is an important source. During 1982 and 1983, the Northeast and the Midwest contributed comparably to aerosol sulfate at Narragansett and Underhill, in spite of the fact that the emissions of sulfur dioxide in the Midwest were ten times those in the Northeast; Canadian smelters accounted for less than 10 percent of the total sulfate. During a major pollution episode in July 1982, northeastern and midwestern sources produced comparable sulfate concentrations in Rhode Island, whereas midwestern sources dominated northeastern sources in Vermont. Thus, although distant midwestern sources affect the quantity of pollution aerosol in the Northeast and may dominate episodically, nearer northeastern sources are comparably important on the long term. The regional elemental tracer system has shown that pollution aerosol in the Northeast is composed of a northeastern ``foreground'' plus superimposed pulses from the Midwest. When these pulses are strong enough, they form the classical episodes of midwestern aerosol. During periods of stagnation in the Northeast, however, aerosol produced locally can reach concentrations that rival or exceed those coming from the Midwest, even for sulfate. These two types of episodes can be distinguished clearly with elemental tracers. Over the long term, the Northeast is its most important source for elements that are distributed broadly over eastern North America or enriched in northeastern emissions (vanadium, antimony, zinc, manganese, and probably many other elements not part of our tracer system). For elements enriched in distant sources, such as arsenic and indium from the Canadian nonferrous smelters and selenium and sulfur from the Midwest, the contributions of these distant sources may equal or exceed those from the Northeast. For sulfate, which is perhaps the most environmentally significant of these elements, transport models and other measurement programs confirm our basic conclusion that the Northeast and the Midwest contribute comparably to ambient levels in the Northeast. This amounts to a tenfold discrimination against midwestern sources, which emit approximately 20 million tons of SO2 annually versus 2 million tons for north-eastern sources. A similar degree of discrimination with distance has been built into the MOI transport models (20). More data are needed to refine our understanding of sources and transport of pollution aerosol in eastern North America. The elemental tracer system can and should be extended to other elements, to source regions farther from the Northeast, to additional seasons and years, and to precipitation. But the basic picture seems clear: even though strong pulses of transported aerosol reach the Northeast regularly from the Midwest, over the long term the Northeast is a major or dominant source of its pollution aerosol.

Rahn, Kenneth A.; Lowenthal, Douglas H.

1985-04-01

408

Distribution patterns, properties and ages of Pleistocene periglacial slope deposits in the eastern Rhenish Massif  

NASA Astrophysics Data System (ADS)

Pleistocene periglacial slope deposits (PPSD) cover almost continuously the low mountain areas of Germany. They are interpreted as the result of frost weathering, gelisolifluction, cryoturbation, meltwater outwash processes and loess incorporation. Four types of PPSD are distinguished in the German classification system: A Basal Layer consists entirely of debris of the underlying rock, which it usually directly overlies. It occurs in almost every relief position, and several Basal Layers may have formed on top of each other. An Intermediate Layer contains varying proportions of loess. It is only found in relief positions favourable for loess accumulation and preservation. Its position within a vertical sequence of PPSD is usually on top of a Basal Layer. An Upper Layer consists of a mixture of rock debris and loess, and contains generally a lower amount of loess than a possibly underlying Intermediate Layer. It has a remarkably steady thickness of around 50 cm, as confirmed in many studies. The Top Layer is mostly restricted to the surroundings of outcrops of particularly resistant rock in higher regions and mainly consists of rock debris. PPSD were investigated in the eastern Westerwald area, at the eastern edge of the Rhenish Massif, Germany. Parent rock, exposition, position and shape of slope were expected to be factors influencing the occurrence, thickness and properties of the different types of PPSD. Therefore, profiles were excavated on the main rock types in the area, which are shale, quartzite and diabase. On each rock type, profiles were studied along catenas in NW, SW, SE and NE exposition, each catena including a profile in upper, middle and footslope position. In upper slope positions on shale an Upper Layer covers directly the rock, independent of exposition. In downslope direction, still above the mid slope profiles, a Basal Layer appears between the Upper Layer and the rock. In upper slope positions on quartzite, a Basal Layer is already present between an Upper Layer and the rock in all expositions. The total thickness of the PPSD sequence on quartzite grows downslope, mainly due to an increasing thickness of the Basal Layer. In addition, Intermediate Layers contribute to the thickness of the PPSD profile on the lower slopes in SE- and NE-exposition. This can be partly explained by enhanced loess sedimentation on the leeward slopes in an area of predominantly westerly winds. Additionally, sediments were best preserved on E slopes, because thaw-processes leading to remobilization and removal of formerly deposited sediments were less intensive there. In most of the upper slope profiles on diabase, an Upper Layer covers directly the rock. A Basal Layer starts between the upper and middle slope sites. In SE exposition, an Intermediate Layer appears already on the mid slope. The total thickness of the PPSD sequence reaches its maximum on the footslope, where several Basal Layers may occur on top of one another. With regard to the formation time of the different layers, it is assumed that Basal and Intermediate Layers could have formed during several cold periods of the Pleistocene. It is however most likely that pre-Wurmian layers were preserved only on footslopes, where several Basal Layers occur on top of each other. All other layers are probably of Wurmian age, because the steep slopes did not allow preservation of older sediments (in contrast to areas of Tertiary peneplains in the central Rhenish Massif). Infrared stimulated luminescence datings confirm the assumption that the Upper Layer was subject to gelisolifluction for the last time during the Younger Dryas, and that the remarkably constant thickness of about 50 cm of the Upper Layer represents the thickness of the active layer at that time.

Sauer, Daniela; Scholten, Thomas; Felix-Henningsen, Peter; Kadereit, Annette

2010-05-01

409

The Kokchetav Massif, Kazakhstan: "Type locality" of diamond-bearing UHP metamorphic rocks  

NASA Astrophysics Data System (ADS)

After the discovery of metamorphic coesite in crustal rocks from the Western Alps (Italy) and the Western gneiss region (Norway) in the mid 1980s of the last century, metamorphic diamond was observed only a few years later "in situ" in the Kokchetav Massif (Kazakhstan). Findings of such coesite- and diamond-bearing ultrahigh pressure metamorphic (UHP) rocks with protoliths formed or embedded in crustal levels and subsequently experienced PT-conditions within or even higher than the coesite stability field have dramatically changed our geodynamic view of orogenetic processes. These occurrences provide evidence that crustal rocks were subducted into mantle depths and exhumed to the surface. Recent studies even suggest continental subduction to depths exceeding 300 km. These rocks have been extensively studied and many new and important observations have been made. Thus far, more than 350 papers have been published on various aspects of Kokchetav UHP rocks. The Kokchetav Massif of northern Kazakhstan is part of one of the largest suture zones in Central Asia and contains slices of HP and UHP metamorphic rocks. Classical UHP rocks mainly occur in the Kumdy Kol, Barchi Kol and Kulet areas, and include a large variety of lithologies such as calcsilicate rocks, eclogite, gneisses, schists, marbles of various compositions, garnet-pyroxene-quartz rocks, and garnet peridotite. Most of them contain microdiamonds; some of which reach a grain size of 200 ?m. Most diamond grains show cuboid shapes but in rare cases, diamonds within clinozoisite gneiss from Barchi Kol occur as octahhedral form. Microdiamonds contain highly potassic fluid inclusions, as well as solid inclusions like carbonates, silicates and metal sulfides, which favour the idea of diamond formation from a C-O-H bearing fluid. Nitrogen isotope data and negative ?13C values of Kokchetav diamonds indicate a metasedimentary origin. PT-estimates of Kokchetav UHP rocks yield peak metamorphic conditions of at least 43 kbar at temperatures of about 950-1000 °C. Some zircon separates show inherited Proterozoic cores and 537-530 Ma UHP metamorphic mantle zones. Several Ar-Ar-ages on micas scatter around 529-528 and 521-517 Ma and reflect different stages of the exhumation history. Migmatization occurred during exhumation at about 526-520 Ma. Isotopic studies on calcsilicate rocks confirm a metasedimentary origin: ?18O values of garnet and clinopyroxene of a layered calcsilicate rock rule out the possibility having a primitive mantle protolith. Similar studies on eclogites indicate their basaltic protolith having experienced water-rock interaction prior to UHP metamorphism. A number of unique mineralogical findings have been made on Kokchetav UHP rocks. K-feldspar exsolutions in clinopyroxene demonstrate that potassium can be incorporated into the cpx-structure under upper mantle pressures. Other significant observations are coesite exsolutions in titanite, quartz-rods in cpx, the discovery of K-tourmaline as well as new minerals like kokchetavite, a hexagonal polymorph of K-feldspar and kumdykolite, an orthorhombic polymorph of albite. The Kokchetav UHP rocks represent a unique and challenging stomping ground for geoscientists of various disciplines. From crystallography, petrology and geochemistry to geophysics and geodynamics/geotectonics - it concerns all who are interested in the diverse metamorphic processes under upper mantle conditions.

Schertl, H.-P.; Sobolev, N. V.

2013-02-01

410

First report of microdiamond in kyanite-garnet schist and coesite in eclogite from the Central Rhodope Massif, Bulgaria  

NASA Astrophysics Data System (ADS)

In this study we have investigated the melange units (Variegated Formation) of the Chepelare region of the Central Rhodope Massif in Bulgaria. These units consist of amphibolites, marbles, eclogites, metaperidotites and kyanite-garnet schists, all incorporated in Carboniferous gneisses (Arda Unit). The sequence closely resembles the microdiamond bearing Kimi Complex of the Greek Rhodopes, but no study has proven a common origin for these two formations. Protoliths of individual rock units have been determined via use of petrography, bulk rock elemental analysis and Sr and Nd isotope datasets, and the major element chemistry of individual crystals has been measured via EPMA. In the kyanite-garnet schist, garnets are almandine rich (Alm72Gross4Prp20), with inclusions of kyanite, biotite, muscovite, apatite, quartz and rutile, and preserve evidence of UHP metamorphism. A 5 ?m carbon inclusion has been confirmed as a diamond via Laser Raman Spectroscopy, with an intense band at 1333 cm-1, comparable to microdiamonds from other UHP metamorphic provinces. In addition, a quartz inclusion surrounded by radial fracturing in a garnet grain from an eclogite sample has been interpreted as a pseudomorph after coesite. UHP conditions are further reinforced by geothermobarometry. For the diamond bearing kyanite-garnet schist samples the Zr in rutile thermometer yields temperatures of ~770 °C, and the Ti in phengite barometer yields pressures of ~3 GPa. Our new results compliment the well documented evidence for UHP conditions in the Greek (southernmost) part of the Rhodope Massif, and new data from kyanite and coesite bearing eclogites from the Pirin and Ograzden Mountains to the west of the Rhodope Massif. Together these new findings, and the wide spread nature of these melange units suggest that UHP conditions in SE Europe are much more widespread than previously believed.

Collings, D. A.; Savov, I. P.; Harvey, J.

2011-12-01

411

Tectonic structure, lithology, and hydrothermal signature of the Rainbow massif (Mid-Atlantic Ridge 36°14'N)  

NASA Astrophysics Data System (ADS)

is a dome-shaped massif at the 36°14'N nontransform offset along the Mid-Atlantic Ridge. It hosts three ultramafic-hosted hydrothermal sites: Rainbow is active and high temperature; Clamstone and Ghost City are fossil and low temperature. The MoMARDREAM cruises (2007, 2008) presented here provided extensive rock sampling throughout the massif that constrains the geological setting of hydrothermal activity. The lithology is heterogeneous with abundant serpentinites surrounding gabbros, troctolites, chromitites, plagiogranites, and basalts. We propose that a W dipping detachment fault, now inactive, uplifted the massif and exhumed these deep-seated rocks. Present-day deformation is accommodated by SSW-NNE faults and fissures, consistent with oblique teleseismic focal mechanisms and stress rotation across the discontinuity. Faults localize fluid flow and control the location of fossil and active hydrothermal fields that appear to be ephemeral and lacking in spatiotemporal progression. Markers of high-temperature hydrothermal activity (˜350°C) are restricted to some samples from the active field while a more diffuse, lower temperature hydrothermal activity (<220°C) is inferred at various locations through anomalously high As, Sb, and Pb contents, attributed to element incorporation in serpentines or microscale-sulfide precipitation. Petrographic and geochemical analyses show that the dominant basement alteration is pervasive peridotite serpentinization at ˜160-260°C, attributed to fluids chemically similar to those venting at Rainbow, and controlled by concomitant alteration of mafic-ultramafic units at depth. Rainbow provides a model for fluid circulation, possibly applicable to hydrothermalism at oceanic detachments elsewhere, where both low-temperature serpentinization and magmatic-driven high-temperature outflow develop contemporaneously, channeled by faults in the footwall and not along the detachment fault.

Andreani, Muriel; Escartin, Javier; Delacour, Adélie; Ildefonse, Benoit; Godard, Marguerite; Dyment, Jérôme; Fallick, Anthony E.; Fouquet, Yves

2014-09-01

412

Record of metal workshops in peat deposits: history and environmental impact on the Mont Lozère Massif, France.  

PubMed

This study aims to document the history of the metallurgical activities on the Mont Lozère massif in the Cévennes Mountains in Southern France. Many medieval sites of metallurgical wastes (slags) have been reported on the massif. These sites are thought to represent ancient lead workshops. The impact of past metallurgical activity on the environment was studied using geochemical and palynological techniques on a core collected in the Narses Mortes peatland near medieval smelting area. Two main periods of smelting activities during the last 2200 years were revealed bythe lead concentration and isotopic composition along the core profile: the first period corresponds to the Gallic period (approximately ca. 300 B.C. to ca. 20 A.D.) and the second one to the Medieval period (approximately ca. 1000-1300 A.D.). Forest disturbances are associated with lead anomalies for the two metallurgical activities described. The impact of the first metallurgy was moderate during the Gallic period, during which beech and birch were the tree species most affected. The second period corresponds to the observed slag present in the field. Along with agropastoral activities, the medieval smelting activities led to the definitive disappearance of all tree species on the summit zones of Mont Lozère. The abundance of ore resources and the earlier presence of wood on the massif justify the presence of workshops at this place. The relationship between mines and ores has been documented for the Medieval period. There is no archaeological proof concerning the Gallic activity. Nevertheless, 2500-2100 years ago, the borders of the Gallic Tribe territory, named the Gabales, were the same as the present-day borders of the Lozère department. Julius Caesar reported the existence of this tribe in 58 B.C. in "De Bello Gallico", and in Strabon (Book IV, 2.2) the "Gabales silver" and a "treasure of Gabales" are mentioned, but to this day, they have not been found. PMID:16082940

Baron, S; Lavoie, M; Ploquin, A; Carignan, J; Pulido, M; De Beaulieu, J L

2005-07-15

413

Pan-African magmatism in the Menderes Massif: geochronological data from leucocratic tourmaline orthogneisses in western Turkey  

NASA Astrophysics Data System (ADS)

The Menderes Massif, exposed in western Anatolia, is a metamorphic complex cropping out in the Alpine orogenic belt. The metamorphic rock succession of the Massif is made up of a Precambrian basement and overlying Paleozoic-early Tertiary cover series. The Pan-African basement is composed of late Proterozoic metasedimentary rocks consisting of partially migmatized paragneisses and conformably overlying medium- to high-grade mica schists, intruded by orthogneisses and metagabbros. Along the southern flank of the southern submassif, we recognized well-preserved primary contact relationship between biotite and leucocratic tourmaline orthogneisses and country rocks as the orthogneisses represent numerous large plutons, stocks and vein rocks intruded into a basement of garnet mica schists. Based on the radiometric data, the primary deposition age of the precursors of the country rocks, garnet mica schist, can be constrained between 600 and 550 Ma (latest Neoproterozoic). The North Africa-Arabian-Nubian Shield in the Mozambique Belt can be suggested as the possible provenance of these metaclastics. The intrusion ages of the leucocratic tourmaline orthogneisses and biotite orthogneisses were dated at 550-540 Ma (latest Neoproterozoic-earliest Cambrian) by zircon U/Pb and Pb/Pb geochronology. These granitoids represent the products of the widespread Pan-African acidic magmatic activity, which can be attributed to the closure of the Mozambique Ocean during the final collision of East and West Gondwana. Detrital zircon ages at about 550 Ma in the Paleozoic muscovite-quartz schists show that these Pan-African granitoids in the basement form the source rocks of the cover series of the Menderes Massif.

Koralay, O. E.; Candan, O.; Chen, F.; Akal, C.; Oberhänsli, R.; Sat?r, M.; Dora, O. Ö.

2012-11-01

414

The rare earth element potential of kaolin deposits in the Bohemian Massif (Czech Republic, Austria)  

NASA Astrophysics Data System (ADS)

Four kaolin deposits in the Bohemian Massif were studied in order to assess the potential for the recovery of rare earth elements (REE) as by-products from the residue after extraction and refining of the raw kaolin. The behaviour of REE + Y during kaolinitization was found to be largely a function of pre-alteration mineralogy. In the examples studied, i.e. granite-derived deposits of Kriechbaum (Austria) and Boži?any, and arkose-derived deposits of Kazn?jov and Podbo?any (all Czech Republic), the REE + Y are predominantly hosted by monazite which has remained unaffected by kaolinitization. The overall REE + Y content of the variably kaolinitized rocks is strongly dependent on their genesis. While ion adsorption plays only a minor role in the concentration of REE + Y in the studied kaolinitized rocks, the processing and refining of the raw kaolin leads to residues that are enriched in REE + Y by a factor of up to 40. The use of a magnetic separator and a hydrocyclone in the processing of the raw material can yield REE + Y contents of as much as 0.77 wt%. Although this value compares well with the REE + Y concentration in some potentially economic REE + Y projects elsewhere, the overall tonnage of the (REE + Y)-enriched residue is by far not sufficient to consider economic extraction of REE + Y as by-product. Our results are most probably applicable also to other kaolin deposits derived from the weathering of Hercynian basement granites elsewhere (e.g. in Saxonia and Bavaria, Germany). Overall, the potential for REE + Y production as by-product from kaolin mining has to be regarded as minimal.

Höhn, S.; Frimmel, H. E.; Pašava, J.

2014-08-01

415

Conventional U-Pb dating versus SHRIMP of the Santa Barbara Granite Massif, Rondonia, Brazil  

USGS Publications Warehouse

The Santa Ba??rbara Granite Massif is part of the Younger Granites of Rondo??nia (998 - 974 Ma) and is included in the Rondo??nia Tin Province (SW Amazonian Craton). It comprises three highly fractionated metaluminous to peraluminous within-plate A-type granite units emplaced in older medium-grade metamorphic rocks. Sn-mineralization is closely associated with the late-stage unit. U-Pb monazite conventional dating of the early-stage Serra do Cicero facies and late-stage Serra Azul facies yielded ages of 993 ?? 5 Ma and 989 ?? 13 Ma, respectively. Conventional multigrain U-Pb isotope analyses of zircon demonstrate isotopic disturbance (discordance) and the preservation of inherited older zircons of several different ages and thus yield little about the ages of Sn-granite magmatism. SHRIMP U-Pb ages for the Santa Ba??rbara facies association yielded a 207Pb/206Pb weighted-mean age of 978 ?? 13 Ma. The textural complexity of the zircon crystals of the Santa Ba??rbara facies association, the variable concentrations of U, Th and Pb, as well as the mixed inheritance of zircon populations are major obstacles to using conventional multigrain U-Pb isotopic analyses. Sm-Nd model ages and ??Nd (T) values reveal anomalous isotopic data, attesting to the complex isotopic behaviour within these highly fractionated granites. Thus, SHRIMP U-Pb zircon and conventional U-Pb monazite dating methods are the most appropriate to constrain the crystallization age of the Sn-bearing granite systems in the Rondo??nia Tin Province.

Sparrenberger, I.; Bettencourt, J.S.; Tosdal, R.M.; Wooden, J.L.

2002-01-01

416

Schéma structural et évolution tectonique du domaine para-autochtone cévenol de la chaîne hercynienne (Massif central français)  

NASA Astrophysics Data System (ADS)

This new structural map of the Cévennes area shows below the stack of micaschist nappes the presence of a gneiss window which cannot be correlated to the lower gneiss nappe of the Massif Central. In the northern part, the S-SW verging deformations are reworked by an anatexis which is older than the Cevennes plutonism and the Velay migmatites. The granodiorites emplaced around 315 Ma during the postcollision thinning are the driving power of hydrothermal convective flows responsible for the formation of gold bearing quartz veins.

Faure, Michel; Charonnat, Xavier; Chauvet, Alain

1999-03-01

417

Une complication rare des l?iomyomes ut?rins: h?mop?ritoine massif par rupture de varices  

PubMed Central

Les léiomyomes utérins sont des causes exceptionnelles d'hémopéritoine. Nous rapportons ici le cas d'une femme de 46 ans nullipare, en instance d'une hystérectomie totale indiquée pour utérus polymyomateux symptomatique. Elle a été opérée en urgence pour hémopéritoine aigu et massif compliqué de choc hémorragique. L'origine de l'hémopéritoine était la rupture spontanée d'une varice du léiomyome. Quoique rare l'éventualité d'un hémopéritoine causé par un fibrome utérin devrait être évoquée devant tout abdomen aigu spontané chez une femme en âge de procréer. La présence de varices sur les fibromes augmenterait le risque d'hémorragie spontanée. PMID:23717724

Ymele, Florent Fouelifack; Tsuala, Jovanny Fouogue; Fouedjio, Jeanne Hortence; Nangue, Charlette; De Kayo, Caroline Kayo; Dobgima, Pisoh Walter; Mbu, Robinson Enoh

2013-01-01

418

Evolution of chemical composition of pyrochlore group minerals from phoscorites and carbonatites of the Khibina alkaline massif  

NASA Astrophysics Data System (ADS)

Phoscorites and carbonatites of the Khibina alkaline massif, Russia contain three minerals of the pyrochlore group. They are, in order of crystallization: uranpyrochlore and pyrochlore in the phoscorites, and pyrochlore and bariopyrochlore in late calcite carbonatites. Early calcite carbonatites also contain uranpyrochlore and pyrochlore, but they are xenocrysts derived from the phoscorites. Alteration of the pyrochlore group minerals led to increasing U, Ti and water contents and decreasing Na, Ca, Nb and F contents. Crystallization of zoned uranpyrochlore to pyrochlore crystals in the phoscorites is explained by the experiments of Ryabchikov and Hamilton (1993, 1994) on the interaction of carbonate-phosphate melts with mantle peridotites.

Zaitsev, A. N.; Williams, C. T.; Wall, F.; Zolotarev, A. A.

2012-12-01

419

10. VIEW TO NORTHEAST FROM WITHIN SOUTHWEST BAY, LOOKING THROUGH ...  

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

10. VIEW TO NORTHEAST FROM WITHIN SOUTHWEST BAY, LOOKING THROUGH CENTER BAY AND INTO NORTHEAST BAY. NOTE TRAVELING BRIDGE CRANE OVERHEAD AND SWINGING BOOM CRANES ATTACHED TO COLUMNS ON RIGHT AND LEFT. NOTE ALSO THE DIFFERENCE IN TRUSSES SUPPORTING CRANEWAY TRACKS FOR SIDE BAYS AND CENTER BAY. TRUSSES SUPPORTING CRANEWAY TRACKS IN SIDE BAYS (CENTER FOREGROUND AND FAR BACKGROUND) ARE HOWE TRUSSES WITH WOOD DIAGONALS AND STEEL VERTICALS. TRUSSES SUPPORTING CRANEWAY TRACKS IN CENTER BAY (MID BACKGROUND) ARE PRATT TRUSSES WITH WOOD VERTICALS AND DIAGONALS. - Rosie the Riveter National Historical Park, Auxiliary Plate Shop, 912 Harbour Way, Richmond, Contra Costa County, CA

420

Credit PSR. This view displays the southeast and northeast facades ...  

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

Credit PSR. This view displays the southeast and northeast facades as seen when looking west southwest (256°) at structure. The heavily insulated door has been opened to the insulated curing room. A maximum of 600 pounds (272.7 Kg) of Class 1.1 propellant were permitted in the building, with a maximum of three personnel. The exterior door at the rear of the building (northeast facade) leads to the equipment room which provided heating/cooling necessary for proper curing - Jet Propulsion Laboratory Edwards Facility, Propellant Curing Building, Edwards Air Force Base, Boron, Kern County, CA

421

North and northeast Greenland ice discharge from satellite radar interferometry  

SciTech Connect

Ice discharge from north and northeast Greenland calculated from satellite radar interferometry data of 14 outlet glaciers is 3.5 times that estimated from iceberg production. The satellite estimates, obtained at the grounding line of the outlet glaciers, differ from those obtained at the glacier front, because basal melting is extensive at the underside of the floating glacier sections. The results suggest that the north and northeast parts of the Greenland ice sheet may be thinning and contributing positively to sea-level rise. 24 refs., 3 figs., 1 tab.

Rignot, E.J. [California Institute of Technology, Pasadena, CA (United States)] [California Institute of Technology, Pasadena, CA (United States); Gogineni, S.P. [Univ. of Kansas, Lawrence, KS (United States)] [Univ. of Kansas, Lawrence, KS (United States); Krabill, W.B. [NASA Goddard Space Flight Center, Wallops Island, VA (United States)] [and others] [NASA Goddard Space Flight Center, Wallops Island, VA (United States); and others

1997-05-09

422

77 FR 64303 - Fisheries of the Northeastern United States; Northeast Multispecies; Amendment 19  

Federal Register 2010, 2011, 2012, 2013

...Volume 77, Number 203 (Friday, October 19, 2012)] [Proposed Rules] [Pages 64303-64304...States; Northeast Multispecies; Amendment 19 AGENCY: National Marine Fisheries Service...Management Council has submitted Amendment 19 to the Northeast Multispecies Fishery...

2012-10-19

423

40 CFR 81.62 - Northeast Mississippi Intrastate Air Quality Control Region.  

... false Northeast Mississippi Intrastate Air Quality Control Region. 81.62 Section 81...CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.62 Northeast...

2014-07-01

424

Extension's Role as an Information Source and Channel among Northeast Texas Farmers  

E-print Network

about the Website eXtension . 87 Table 26. Linear Regression of Internet Use by Personal Characteristics of Northeast Texas Farmers ................................................................................................... 89 Table 27. ANOVA... for Linear Regression of Internet Use by Personal Characteristics of Northeast Texas Farmers .............................................................................. 90 Table 28. Internet Usage by Age of Northeast Texas Farmers...

Triplett, Brian Lee 1968-

2012-11-06

425

| | | | |Monday, July 16, 2012 Three Northeast Ohio offshore wind power projects  

E-print Network

| | | | |Monday, July 16, 2012 Home Three Northeast Ohio offshore wind power projects secure federal money By SCOTT SUTTELL 1:52 pm, September 9, 2011 Three Northeast Ohio offshore wind power." Three Northeast Ohio offshore wind power projects secure federal money... http

Rollins, Andrew M.

426

13. VIEW EAST OF NORTHEAST CONCRETE PIER AND WING WALL. ...  

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

13. VIEW EAST OF NORTHEAST CONCRETE PIER AND WING WALL. NOTE DETAIL OF 1920 CONCRETE PIER WHICH WAS CAST IN PLACE AROUND A VERTICAL POST, AND STOP LOCK NOTCH TO LEFT OF CONCRETE PIER. - Chesapeake & Ohio Canal, Conococheague Creek Aqueduct, Milepost 99.80, Williamsport, Washington County, MD

427

Credit PSR. View looking northeast (40°) across concrete pad and ...  

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

Credit PSR. View looking northeast (40°) across concrete pad and foundations for Recreation Hall. Broken concrete in foreground may be foundation remains for boiler chimney. North Base hangars stand in distant background - Edwards Air Force Base, North Base, Recreation Hall & Chapel T-73, E Street near North Base Road, Boron, Kern County, CA

428

25. BOILER HOUSE, LOOKING FROM THE NORTHEAST AT COAL CARS ...  

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

25. BOILER HOUSE, LOOKING FROM THE NORTHEAST AT COAL CARS No. 9 & 5 (NOTE: COAL CONVEYOR RUNNING ABOVE THE CARS; THIS CONVEYOR ORIGINATES IN COAL TOWER No. 1 (WEST)) - Delaware County Electric Company, Chester Station, Delaware River at South end of Ward Street, Chester, Delaware County, PA

429

52. VIEW NORTHEAST ACROSS WINDING MACHINERY: Overall view towards northwest ...  

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

52. VIEW NORTHEAST ACROSS WINDING MACHINERY: Overall view towards northwest of the winding machinery on the first floor of the Washington and Mason Streets powerhouse and car barn. Photograph taken from museum mezzanine looking along the tension runs. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

430

4. Centerline view of bridge. View to northeast from intersection ...  

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

4. Centerline view of bridge. View to northeast from intersection of Port Kenyon Road and Dillon Road. Former Valley Flower Creamery in background center. Note extremely heavy foliage on both sides of bridge. - Salt River Bridge, Spanning Salt River at Dillon Road, Ferndale, Humboldt County, CA

431

Business. Revised Summary Report: Technical Employment in Northeast Florida.  

ERIC Educational Resources Information Center

The document is one of five summary reports, all part of a Pre-Technical Curriculum Planning Project for secondary students who aspire to technical employment or post secondary technical education. This report represents the results of an assessment of the northeast Florida areas technical occupations in business. A three-phase approach was…

Baker, William E.; And Others

432

PLANAR VIEW OF NORTHEAST SIDE OF HYDROELECTRIC POWER HOUSE AND ...  

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

PLANAR VIEW OF NORTHEAST SIDE OF HYDRO-ELECTRIC POWER HOUSE AND SOUTHWEST END OF DREDGE BYPASS IN FOREGROUND, VIEW TOWARDS SOUTHWEST. - St. Lucie Canal, Lock No. 2, Dredge Bypass, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

433

Potential Drivers of Urban Heat Islands in the Northeast  

E-print Network

Potential Drivers of Urban Heat Islands in the Northeast USA Ping Zhang1,2, Marc Imhoff1, Robert. general public should be interested in urban heat islands because of the fact that it's where most. And the urban heat island matters for everything from health, like asthma and heart conditions, to how much

434

13. VIEW NORTHEAST OF BRICK CHIMNEY STACK WITH '1876' MARKER ...  

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

13. VIEW NORTHEAST OF BRICK CHIMNEY STACK WITH '1876' MARKER EMBEDDED; CHIMNEY REMOVED EXHAUST FROM FORGES IN THE BLACKSMITH SHOP, BUILDING 11, REMNANTS OF WHICH CAN BE SEEN IN THE CENTER FOREGROUND - Scovill Brass Works, 59 Mill Street, Waterbury, New Haven County, CT

435

9. WEST SIDE OF HANGAR, FACING NORTHEAST. TAKEN FROM LOW ...  

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

9. WEST SIDE OF HANGAR, FACING NORTHEAST. TAKEN FROM LOW ROOF OF TAN 679 ON WEST SIDE OF HANGAR. DETAIL OF ARCH ABUTMENTS, FOUNDATIONS, SMC WASTE HANDLING STRUCTURE. - Idaho National Engineering Laboratory, Test Area North, Hangar No. 629, Scoville, Butte County, ID

436

2. VIEW, LOOKING FROM THE NORTHEAST. THESE THREE CONCRETE MORTAR ...  

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

2. VIEW, LOOKING FROM THE NORTHEAST. THESE THREE CONCRETE MORTAR BLOCKS WERE FOR THE MILL'S 3-STAMP BATTERIES ERECTED IN 1903, NORTH OF THE TWO 1901 BATTERIES WHICH WERE MOUNTED ON WOODEN TIMBERS - Wilbur-Womble Mill, Southern Edge Of Salt Spring Valley, Copperopolis, Calaveras County, CA

437

VIEW NORTHEAST FROM TOP OF OIL TANK WITH NO. 2 ...  

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

VIEW NORTHEAST FROM TOP OF OIL TANK WITH NO. 2 BLAST FURNACE TO LEFT, NO. 1 BLAST FURNACE CENTER, AND NO. 3 (JANE) WEST ORE BRIDGE RIGHT, FLOODED ORE YARD IS IN FOREGROUND, HULETT CAR DUMPER AT RIGHT. - Pittsburgh Steel Company, Monessen Works, Blast Furnace No. 1 & No. 2, Donner Avenue, Monessen, Westmoreland County, PA

438

15. VIEW OF NORTHEAST TRENDING ROAD WHICH TRAVERSES FROM LUCKY ...  

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

15. VIEW OF NORTHEAST TRENDING ROAD WHICH TRAVERSES FROM LUCKY TIGER MILL PAST DINING HALL REMAINS (FEATURE B-7) ON EXTREME LEFT OF PHOTO AND THE FAMILY RESIDENCE (FEATURE B-10), LEFT OF CENTER OF PHOTOGRAPH. (OCTOBER, 1995) - Nevada Lucky Tiger Mill & Mine, East slope of Buckskin Mountain, Paradise Valley, Humboldt County, NV

439

2. NORTHWEST FRONT AND NORTHEAST SIDE OF CABINS (FORGEMAN'S HOUSE ...  

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

2. NORTHWEST FRONT AND NORTHEAST SIDE OF CABINS (FORGEMAN'S HOUSE NO. 1 TO THE LEFT IS NOT VISIBLE IN PHOTOGRAPH) - Mount Etna Iron Works, Forgeman's House No. 1, Legislative Route 07020 between junctions of T.R. 461 & 463, Williamsburg, Blair County, PA

440

Meeting the New Century: Winslow Homer's Drawing after Northeaster  

Microsoft Academic Search

In 1900, Winslow Homer responded to a request from the editor of the Boston periodical The Congregationalism John C. Van Dyke, a well-known art critic, who wished to use Homer's 1895 oil painting Northeaster to illustrate an article on “A Century's Progress in Art.” Refusing to send the painting to an engraver to be reproduced, Homer made a drawing after

Lucretia Hoover Giese

2005-01-01

441

38. NORTHEAST ROOM, SECOND FLOOR, SOUTH WALL. ROOM COMPLETELY WALLED ...  

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

38. NORTHEAST ROOM, SECOND FLOOR, SOUTH WALL. ROOM COMPLETELY WALLED WITH RANDOM WIDTH BOARDS WHICH WERE PAPERED OR PLASTERED OVER. THIS WAS TYPICAL THROUGHOUT HOUSE EXCEPT FOR WOOD PANELED WALLS - John Mark Verdier House, 801 Bay & Scott Streets, Beaufort, Beaufort County, SC

442

Coastal Fresh Water Discharge in the Northeast Pacific  

Microsoft Academic Search

Very high annual rates of precipitation in the coastal mountains that border the northeast Pacific Ocean produce large fresh water discharges (23000 m 3 s-i). This discharge has been ignored previously since it does not enter the ocean in the form of large rivers, but, instead, the water enters by way of numerous small rivers and streams. Thus, it acts

Thomas C. Royer

1982-01-01

443

2. Aerial view northeast, State Route 92 bottom left and ...  

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

2. Aerial view northeast, State Route 92 bottom left and State Route 100 center, Brandywine Creek State Park center right, duck pond and reservoir center bottom. - Winterthur Farms, Intersection State Routes 92 & 100, Intersection State Routes 92 & 100, Winterthur, New Castle County, DE

444

5. VIEW NORTHEAST, ROUTE 130 NORTH AND 30 WEST FROM ...  

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

5. VIEW NORTHEAST, ROUTE 130 NORTH AND 30 WEST FROM ROUTE 130 NORTH ISLAND - White Horse Pike Rond Point, Intersection of Crescent Boulevard (U.S. Route 130), White Horse Pike (U.S. Route 30), & Clay Avenue, Collingswood, Camden County, NJ

445

8. VIEW NORTHEAST, ROUTE 130 NORTH FROM ROUTE 30 WEST ...  

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

8. VIEW NORTHEAST, ROUTE 130 NORTH FROM ROUTE 30 WEST FROM WOODLYNNE AVENUE ISLAND - White Horse Pike Rond Point, Intersection of Crescent Boulevard (U.S. Route 130), White Horse Pike (U.S. Route 30), & Clay Avenue, Collingswood, Camden County, NJ

446

9. Looking northeast, foreground Clenny Run Road, duck pond and ...  

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

9. Looking northeast, foreground Clenny Run Road, duck pond and Clenny Run, with intersection of State Routes 92 and 100 beyond, Brandywine Creek State Park in background, mixed deciduous trees along top of hill - Winterthur Farms, Intersection State Routes 92 & 100, Intersection State Routes 92 & 100, Winterthur, New Castle County, DE

447

View northeast across Hyde Road showing a residenc on the ...  

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

View northeast across Hyde Road showing a residenc on the east side of the road - Brooklyn Green, North Green, South Green, & West Green, parts of Brown Road, Canterbury Road (Route 169), Hartford Road (Route 6), Hyde Road, Pomfret Road (Route 169), Prince Hill Road, Providence Road (Route 6), Wauregan Road (Routes 169 & 205), & Wolf Den Road, Brooklyn, Windham County, CT

448

View northeast along Pomfret Road (Route 169) showing rersidences on ...  

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

View northeast along Pomfret Road (Route 169) showing rersidences on the east side of the road - Brooklyn Green, North Green, South Green, & West Green, parts of Brown Road, Canterbury Road (Route 169), Hartford Road (Route 6), Hyde Road, Pomfret Road (Route 169), Prince Hill Road, Providence Road (Route 6), Wauregan Road (Routes 169 & 205), & Wolf Den Road, Brooklyn, Windham County, CT

449

CETACEAN HIGHUSE HABITATS OF THE NORTHEAST UNITED STATES CONTINENTAL SHELF  

E-print Network

CETACEAN HIGH�USE HABITATS OF THE NORTHEAST UNITED STATES CONTINENTAL SHELF 1 RoBERT D. KENNEY at a qualitative level that specific areas of the continental shelf waters off the northeastern U.S. coast-use areas include the continental shelf edge and the region around the eastern end of Georges Bank. High

450

10. View of Tombigbee River Bridge facing northeast showing damage ...  

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

10. View of Tombigbee River Bridge facing northeast showing damage to railing on downstream side of north pony span. This view is just north of view shown in photograph no. MS-13-9. - Tombigbee River Bridge, Spanning Tombigbee River at State Highway 182, Columbus, Lowndes County, MS

451

Looking northeast from shore along the length of Pier 22 ...  

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

Looking northeast from shore along the length of Pier 22 with a view of rigging platforms and Shore Power Supply Electric Distribution Center (Building 734) in the distance - Mare Island Naval Shipyard, Finger Piers 22 & 23, Railroad Avenue near Eighteenth Street, Vallejo, Solano County, CA

452

6. View northeast, southwest side of boathouse, west and south ...  

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

6. View northeast, southwest side of boathouse, west and south sides of keeper's house and shed, with railing of walkway to lighthouse in foreground - Squirrel Point Light Station, Off Highway 127, Steen Road to end of Bald Head Road, .8 mile down footpath, Arrowsic, Sagadahoc County, ME

453

The Northeast Regional Center for Rural Development. Annual Report 1998.  

ERIC Educational Resources Information Center

This annual report of the Northeast Regional Center for Rural Development (NERCRD) highlights the Center's activities, programs, projects, and publications for fiscal year 1998. NERCRD receives modest funding from the U.S. Department of Agriculture and other funds from private foundations. Funds are used to link rural development efforts of the 15…

Northeast Regional Center for Rural Development, University Park, PA.

454

Bioenergy and land-use competition in Northeast Brazil  

E-print Network

Bioenergy and land-use competition in Northeast Brazil Christian Azar Department of Physical policies are warranted if use of degraded lands for bioenergy plantations is desired. 1. Introduction There are two main categories of bioenergy: residues and dedicated plantations. In this paper, we exclusively

455

46. INTERIOR VIEW, MUSIC ROOM LOCATED AT THE NORTHEAST CORNER ...  

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

46. INTERIOR VIEW, MUSIC ROOM LOCATED AT THE NORTHEAST CORNER OF THE HOUSE ON THE FIRST FLOOR, LOOKING TO THE FIREPLACE IN THE EAST WALL (DUPLICATE OF HABS No. AL-424-32) - Arlington Place, 331 Cotton Avenue, Southwest, Birmingham, Jefferson County, AL

456

STARTING EXCAVATION PIER 2. This view is roughly northeast, with ...  

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

STARTING EXCAVATION PIER 2. This view is roughly northeast, with Pier 2 on the Trinity County end of the bridge. The old suspension bridge, at upper right, was upstream of new bridge - South Fork Trinity River Bridge, State Highway 299 spanning South Fork Trinity River, Salyer, Trinity County, CA

457

2. GENE CAMP FROM ABOVE COPPER BASIN, LOOKING NORTHEAST (NEGATIVE ...  

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

2. GENE CAMP FROM ABOVE COPPER BASIN, LOOKING NORTHEAST (NEGATIVE FLARED FROM BADLY SEATED FILM HOLDER, RETAINED BECAUSE OF USEFUL INFORMATION ON GEOGRAPHY OF GENE CAMP). - Gene Pump Plant, South of Gene Wash Reservoir, 2 miles west of Whitsett Pump Plant, Parker Dam, San Bernardino County, CA

458

6. View of Dundee Textile Company Mill looking northeast; Building ...  

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

6. View of Dundee Textile Company Mill looking northeast; Building No. 2 at left, Building No. 1 at right, Dundee Canal in foreground - Dundee Canal Industrial Historic District, Beginning at George Street in Passaic & extending north along Dundee Canal approximately 1.2 miles to Canal headgates opposite East Clifton Avenue in Clifton, Passaic, Passaic County, NJ

459

AERIAL VIEW, LOOKING NORTHEAST TOWARD THE CENTRAL BUSINESS DISTRICT (TOP ...  

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

AERIAL VIEW, LOOKING NORTHEAST TOWARD THE CENTRAL BUSINESS DISTRICT (TOP LEFT). - Railroad Reservation, Bounded by Thirty-eighth Street on the east, Sixteenth Street on the west, First Avenue on the north, & First Avenue on the south, Birmingham, Jefferson County, AL

460

The Northeast Corridor (NEC) is the most densely settled  

E-print Network

Motivation The Northeast Corridor (NEC) is the most densely settled and richest region in the US/IF Exercise TF (1st phase HSR) Design in TF (contracts) Exercise TF (go back to incremental) Design in TF Growth--Modest Support Incremental alternative Design in TF/IF Exercise TF (focus on upgrades) ­ Design

Entekhabi, Dara

461

[Current status of surface water acidification in Northeast China].  

PubMed

In order to evaluate the status of surface water acidification in Northeast China, chemical composition of 33 small streams was investigated in August, 2011. It was found that only a few waters located in Changbai Mountain had pH of lower than 6.0, and all waters had acid neutralizing capacity (ANC) of higher than 0.2 meq x L(-1). This indicated that surface water acidification was not a regional environmental issue in Northeast China. HCO3- was the major anion, with SO4(2-) concentration mostly below 150 microeq x L(-1) and even much lower NO3- concentration. Low concentration of SO4(2-) and NO3- means no serious acid deposition in this area. However, the distribution of acidic forest soils, with low base cation weathering rate, could only provide limited buffering capacity for surface water to acidification in Northeast China, and the potential risk of water acidification still existed. Currently, acid deposition in Northeast Asia could hardly cause severe acidification of surface water. The neighboring countries should therefore not amplify the environmental impact by transboundary air pollutants from China. PMID:23914517

Xu, Guang-yi; Kang, Rong-hua; Luo, Yao; Duan, Lei

2013-05-01

462

3. STEVENS 10 FT FAN IN FAN HOUSE, FROM NORTHEAST ...  

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

3. STEVENS 10 FT FAN IN FAN HOUSE, FROM NORTHEAST - Sublet Mine No. 6, Fan House, North structure, west side of Willow Creek Valley, east of County Road No. 306, 3 miles north of U.S. Highway 189, Kemmerer, Lincoln County, WY

463

4. Credit PSR. View east northeast (60°) down dust ditch. ...  

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

4. Credit PSR. View east northeast (60°) down dust ditch. Wing wall of culvert in foreground carries this ditch beneath Second Street near the Utility and Paint Shop foundation (Building 4315). - Edwards Air Force Base, North Base, Dust Ditch System, Traversing North Base, Boron, Kern County, CA

464

3. VIEW TO NORTHEAST, NORTH SIDE OF CENTER DRUM MACHINERY ...  

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

3. VIEW TO NORTHEAST, NORTH SIDE OF CENTER DRUM MACHINERY ROOM. MOTOR #1 COMPARTMENT IN REAR, AUXILIARY MOTOR DRIVE SHAFT, POWER PANELS ON BACK OF AUXILIARY MOTOR HOUSE. BRIDGE DECK FRAMING ABOVE. - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

465

Credit BG. View looks north northeast (22°) across concrete pad ...  

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

Credit BG. View looks north northeast (22°) across concrete pad and foundations for Motor Repair Shop. North Base Road (3rd Street) is in left background, Building 4505 in right background - Edwards Air Force Base, North Base, Motor Repair Shop T-16, Third & C Streets, Boron, Kern County, CA

466

63. DETAIL OF TRAVELING CRANE TRUSS FROM NORTHEAST. TRUSS IS ...  

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

63. DETAIL OF TRAVELING CRANE TRUSS FROM NORTHEAST. TRUSS IS IN FRONT OF CRUSHED OXIDIZED ORE BIN. THE BARREN SOLUTION TANK IS JUST VISIBLE IN RIGHT BACKGROUND. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

467

11. BALD MOUNTAIN MILL, EXTERIOR FROM NORTHEAST, c. 194059. ROASTER ...  

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

11. BALD MOUNTAIN MILL, EXTERIOR FROM NORTHEAST, c. 1940-59. ROASTER AND OTHER UNOXIDIZED ORE CIRCUIT ADDITIONS PRESENT, ALONG WITH SECONDARY THICKENER No. 7 AND ADDITIONS TO MACHINE SHOP. CREDIT JW. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

468

61. VIEW FROM NORTHEAST OF LAUNDER FROM BAKER COOLER TO ...  

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

61. VIEW FROM NORTHEAST OF LAUNDER FROM BAKER COOLER TO MILLING. LAUNDER PIERCES THE SOUTH FOUNDATION WALL BETWEEN MILL SOLUTION TANKS No. 1 AND No. 2. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

469

13. VIEW LOOKING NORTHEAST FROM ROOF OF WEST BOILER ROOM ...  

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

13. VIEW LOOKING NORTHEAST FROM ROOF OF WEST BOILER ROOM AT SIROCCO DUST COLLECTOR WHICH FORMED PART OF THE ORIGINAL POLLUTION CONTROL SYSTEM FOR BOILERS 900 AND 901 INSTALLED IN 1926-1928. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

470

18. CROWS NEST ATOP SUPERSTRUCTURE. Looking up from northeast corner ...  

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

18. CROWS NEST ATOP SUPERSTRUCTURE. Looking up from northeast corner of run line deck. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Test Stand 1-A, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

471

View of building 11050 looking northeast, showing metal sided and ...  

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

View of building 11050 looking northeast, showing metal sided and roofed addition on east elevation. - Naval Ordnance Test Station Inyokern, China Lake Pilot Plant, Fire Station & Marine Barracks, D Street, at corner of 4th Street, China Lake, Kern County, CA

472

50. Detail, northeast facade, reconstructed baggage doors, view to southwest, ...  

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

50. Detail, northeast facade, reconstructed baggage doors, view to southwest, 90mm lens. These doors had been removed and lost by Southern Pacific in the 1960s or 1970s, and were reconstructed using original plans and historic photos for guidance. Note also the almost immediate appearance of graffiti. - Southern Pacific Depot, 559 El Camino Real, San Carlos, San Mateo County, CA

473

Teacher Education in Northeast India--Status, Weaknesses and Alternatives  

ERIC Educational Resources Information Center

Northeast India comprises of a cluster of eight states--Arunachal Pradesh, Assam, Meghalaya, Manipur, Mizoram, Nagaland, Sikkim and Tripura. The region is usually stereotyped as underdeveloped. Geographically, the region is surrounded by international border with part of Nepal, Bhutan, China, Myanmar and Bangladesh. Prevalence of insurgency and…

Bhattacharjee, D. S.

2011-01-01

474

View looking northeast across the east end of West Mount ...  

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

View looking northeast across the east end of West Mount Vernon Place; view includes the lion statue (also designed by Antoine Louis-Barye) as well as the Washington Apartments and Methodist Church in the background - Mount Vernon Place, Charles & Monument Streets, Baltimore, Independent City, MD

475

12. INTERIOR DIABLO POWERHOUSE AS SEEN FROM NORTHEAST CORNER OF ...  

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

12. INTERIOR DIABLO POWERHOUSE AS SEEN FROM NORTHEAST CORNER OF GENERATOR FLOOR LOOKING AT UNIT 31. CONTROL CABINETS FOR ASEA GOVERNOR SYSTEM ARE IN FRONT OF GENERATOR, 1989. - Skagit Power Development, Diablo Powerhouse, On Skagit River, 6.1 miles upstream from Newhalem, Newhalem, Whatcom County, WA

476

View northeast, wharfs A and B, showing steel lift tower, ...  

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

View northeast, wharfs A and B, showing steel lift tower, pier C, and wharf B slope to water - U.S. Coast Guard Sandy Hook Station, Western Docking Structure, West of intersection of Canfield Road & Hartshorne Drive, Highlands, Monmouth County, NJ

477

From a balcony of building 500 looking northeast at building ...  

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

From a balcony of building 500 looking northeast at building 505 beyond to building 600. The water tower is at the upper left edge of the photograph. - Fitzsimons General Hospital, Bounded by East Colfax to south, Peoria Street to west, Denver City/County & Adams County Line to north, & U.S. Route 255 to east, Aurora, Adams County, CO

478

10. General view from southwest to northeast, from the Second ...  

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

10. General view from southwest to northeast, from the Second Floor Porch of the Roeder House, showing the Roeder Store and the White Hall Tavern (to the immediate right of the store). - Roeder Store, Potomac Street, Harpers Ferry, Jefferson County, WV

479

11. INTERIOR VIEW TO THE NORTHEAST OF ROOM 160, AN ...  

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

11. INTERIOR VIEW TO THE NORTHEAST OF ROOM 160, AN OFFICE BY THE MAIN ENTRANCE DOOR OF THE ADMINISTRATION AREA. - Nevada Test Site, Reactor Maintenance Assembly & Dissassembly Facility, Area 25, Jackass Flats, Junction of Roads F & G, Mercury, Nye County, NV

480

Addressing the Urban Stream Syndrome in the Northeast United States  

EPA Science Inventory

The Northeast has become one of the most urbanized regions in the United States, following a long history of watershed alteration and development. Much of the historical drainage infrastructure was designed to transport wastewater and stormwater to streams and rivers as quickly a...

481

LEAD SCAVENGER CELLS, LOOKING NORTHEAST. NOTE VSHAPED LAUNDER TO COLLECT ...  

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

LEAD SCAVENGER CELLS, LOOKING NORTHEAST. NOTE V-SHAPED LAUNDER TO COLLECT CONCENTRATE FROTH THAT SPILLED OVER WIER ALONG EDGE OF CELLS. EACH ELECTRIC MOTOR TURNED AGITATORS IN TWO CELLS VIA BELT DRIVES. - Shenandoah-Dives Mill, 135 County Road 2, Silverton, San Juan County, CO

482

3. CONTEXTUAL VIEW OF WASTE CALCINING FACILITY, CAMERA FACING NORTHEAST. ...  

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

3. CONTEXTUAL VIEW OF WASTE CALCINING FACILITY, CAMERA FACING NORTHEAST. SHOWS RELATIONSHIP BETWEEN DECONTAMINATION ROOM, ADSORBER REMOVAL HATCHES (FLAT ON GRADE), AND BRIDGE CRANE. INEEL PROOF NUMBER HD-17-2. - Idaho National Engineering Laboratory, Old Waste Calcining Facility, Scoville, Butte County, ID

483

View from northeast to southwest of remote launch operations building, ...  

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

View from northeast to southwest of remote launch operations building, showing (left to right) diesel exhaust, diesel intake, and entrance tunnel - Stanley R. Mickelsen Safeguard Complex, Remote Launch Operations Building, Near Service Road exit from Patrol Road, Nekoma, Cavalier County, ND

484

Exterior oblique view of northeast and southeast sides with heavy ...  

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

Exterior oblique view of northeast and southeast sides with heavy weight sliding doors, louvered entry door, view facing west - U.S. Naval Base, Pearl Harbor, Industrial X-Ray Building, Off Sixth Street, adjacent to and south of Facility No. 11, Pearl City, Honolulu County, HI

485

30. VIEW NORTHEAST OF OPERATING MACHINERY. BASCULE LEAF IN CLOSED ...  

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

30. VIEW NORTHEAST OF OPERATING MACHINERY. BASCULE LEAF IN CLOSED POSITION - DRIVE GEAR 'D' IS AT CENTER OF PHOTOGRAPH. NOTE VERNACULAR WEIGHT SUSPENDED ON COUNTERWEIGHT AT TOP LEFT OF PHOTOGRAPH TO COMPENSATE FOR AN UNDERWEIGHT COUNTERWEIGHT - Tomlinson Bridge, Spanning Quinnipiac River at Forbes Street (U.S. Route 1), New Haven, New Haven County, CT

486

1. GENERAL VIEW LOOKING NORTHEAST, SHOWING BASCULE BRIDGE WITH STONE ...  

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

1. GENERAL VIEW LOOKING NORTHEAST, SHOWING BASCULE BRIDGE WITH STONE PIERS. DRAW SPAN AT CENTER OF BRIDGE IS VISIBLE ON RIGHT. METAL STRUCTURE ABOVE BRIDGE ON RIGHT CONTAINS COUNTER WEIGHT. - Congress Street Bascule Bridge, Spanning Fort Point Channel at Congress Street, Boston, Suffolk County, MA

487

Oblique view of southeast and northeast sides with covered walk ...  

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

Oblique view of southeast and northeast sides with covered walk to Facility 367, Facility 324 beyond, view facing west - U.S. Naval Base, Pearl Harbor, Naval Hospital, Animal House, Near intersection of Hospital Way & Third Street, Pearl City, Honolulu County, HI

488

6. Northeast end, Roundhouse Machine Shop Extension, Southern Pacific Railroad ...  

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

6. Northeast end, Roundhouse Machine Shop Extension, Southern Pacific Railroad Carlin Shops, view to southwest (135mm lens). The tall freestanding smokestack from the Boiler Room originally stood adjacent to this end of the building. - Southern Pacific Railroad, Carlin Shops, Roundhouse Machine Shop Extension, Foot of Sixth Street, Carlin, Elko County, NV

489

Credit BG. View looks south at northeast and northwest facades ...  

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

Credit BG. View looks south at northeast and northwest facades of the communications building. A dust ditch bordering A Street passes in the foreground. Building 4402 (Hangar No. 2) appears in left background; Building 4400 (Warehouse) and Building 4401 (Hangar No. 1) appear in right background - Edwards Air Force Base, North Base, Communications Building, First & A Streets, Boron, Kern County, CA

490

Meat Production from Forages in the Northeast1  

Microsoft Academic Search

The purposes of this paper were to determine the animal-forage management practices used in the Northeast and to review practices which may increase efficiency of utilization. University agron- omy and animal science specialists and producers in 12 Northeastern states were surveyed by mail questionnaire. Pertinent results are presented and are related to animal-forage management practices which have been developed and

L. L. Wilson; W. C. Stringer

1981-01-01

491

25. VIEW OF ATLAS CONTROL CONSOLE NEAR NORTHEAST CORNER OF ...  

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

25. VIEW OF ATLAS CONTROL CONSOLE NEAR NORTHEAST CORNER OF SLC-3W CONTROL ROOM. CONSOLE INCLUDES TELEVISION CONTROL, FACILITIES, AND VEHICLE (MISSILE) POWER PANELS. FROM LEFT TO RIGHT IN BACKGROUND: MILITARY-TIME CLOCK, BASE OF BUNKER PERISCOPE, AND STAIRS TO ESCAPE TUNNEL. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

492

8. A VIEW LOOKING NORTHEAST FROM SOUTHWEST OF THE BRIDGE, ...  

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

8. A VIEW LOOKING NORTHEAST FROM SOUTHWEST OF THE BRIDGE, SHOWING THE INTRADOS OF THE ARCH, ITS ARRAS, ARCHED BELTING COURSE AND INCISED ELEMENTS IN THE SPANDRELS. THIS IMAGE ALSO SHOWS THE CONNECTION BETWEEN THE BRIDGE PROPER AND ITS ABUTMENT. - Vandalia Railroad Bridge, Spanning U.S. Route 40, Indianapolis, Marion County, IN

493

Detail of old rain shed (Building No. 43) showing northeast ...  

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

Detail of old rain shed (Building No. 43) showing northeast wall and gutter boxes. Two 750,000 gallon steel tanks at right (T19 in foreground with T18 behind). - Hawaii Volcanoes National Park Water Collection System, Hawaii Volcanoes National Park, Volcano, Hawaii County, HI

494

LATE QUATERNARY EVOLUTION OF THE NORTHEAST FAN, OFFSHORE NOVA SCOTIA  

E-print Network

Department of Earth Sciences Halifax, Nova Scotia Canada B3H 3|5 (902) 494-2358 FAX 1902) 494-f>8«9 DATE layer identified as Heinrich layer H1. Turbidite sands found in cores were high above channel floors across the slope and rise, major differences exist. The upper portion of Northeast Fan rather resembles

Beaumont, Christopher

495

Mercury concentrations in seabirds from colonies in the northeast Atlantic  

Microsoft Academic Search

Total mercury concentrations were determined in samples of body feathers from a range of common seabird species breeding at L»trabjarg, northwest Iceland, St. Kilda, Foula and the Firth of Forth, Scotland and Bleiksøy, Syltefjord, and Hornøy, Norway. Seabirds from L»trabjarg generally exhibited the highest mercury concentrations, with a trend of decreasing mercury concentrations in a southwest to northeast direction in

D. R. Thompson; R. W. Furness; R. T. Barrett

1992-01-01

496

3. VIEW OF NORTHEAST ELEVATION AND 19061010 ONESTORY SHED ADDITION ...  

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

3. VIEW OF NORTHEAST ELEVATION AND 1906-1010 ONE-STORY SHED ADDITION AT LEFT; NORTHWEST ELEVATION AND PARKING AREA AT RIGHT; PARKING AREA WAS SITE OF FORMER STOREHOUSE 'A' AND 'B'; LANE AT LEFT IS NORTH DRIVEWAY, BUILT CA. 1935 - Massachusetts Mills, Cloth Room-Section 15, 95 Bridge Street, Lowell, Middlesex County, MA

497

3. NORTHEAST VIEW OF BIG TUJUNGA DAM SHOWING THE RIGHT ...  

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

3. NORTHEAST VIEW OF BIG TUJUNGA DAM SHOWING THE RIGHT ABUTMENT WITH THE SPILLWAY AND THE BRIDGE IN THE BACKGROUND. PHOTO TAKEN NEAR THE PARKING AREA SOUTH OF THE DAM. - Big Tujunga Dam, 809 West Big Tujunga Road, Sunland, Los Angeles County, CA

498

Detail view of northeast corner of Building No. 18 seen ...  

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

Detail view of northeast corner of Building No. 18 seen from sidewalk at Parking Area No. 20. Looking south - Easter Hill Village, Building No. 18, West side of South Twenty-Sixth Street, north of Hinkley Avenue, Richmond, Contra Costa County, CA

499

91. REFRIGERANT CONDENSER TANKS IN NORTHEAST CORNER OF MECHANICAL EQUIPMENT ...  

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

91. REFRIGERANT CONDENSER TANKS IN NORTHEAST CORNER OF MECHANICAL EQUIPMENT ROOM (101), LSB (BLDG. 770). PREFILTERS AND PRESSURE CONTROLS IN CENTER OF PHOTOGRAPH. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

500

4. View looking northeast toward the east side of the ...  

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

4. View looking northeast toward the east side of the building, showing the original brick wall and wood siding of the addition, as well as the concrete foundation. - Fort Benjamin Harrison, Building No. 27, Otis Avenue east of Green Avenue, Lawrence, Marion County, IN