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1

Utility of petrophysical and geophysical data to constrain the subsurface structure of the Kitakami plutons, northeast Japan  

NASA Astrophysics Data System (ADS)

The Geological Survey of Japan (GSJ), AIST has been systematically measuring physical properties of basement rocks in Japan for more than 30 years and has started to construct a petrophysical database called PB-Rock 21 (Petrophysical Database of Basement rocks in Japan for the 21st Century, http://www.aist.go.jp/RIODB/PB-Rock21/ ). The petrophysical data has been integrated with aeromagnetic data to determine the subsurface structure of the Himekami and Sobanokami plutons, members of the Kitakami plutonic belt, northeast Japan. For the Himekami pluton, the result of apparent magnetization intensity mapping clearly shows zonation within sub-plutons as well as regional rock type differences between the North (felsic) and South (felsic and mafic complex) sub-plutons. The bottom depths of the pluton were estimated by a successive 3-D magnetic modeling to be 1.7 km (North sub-pluton) and 1.5 km below sea level (South sub-pluton), respectively. Magnetic modeling of the Sobanokami pluton, which is partly exposed at the eastern edge of the Ishinomaki Plain, implies that the main part of the pluton extends to the northwest below the surface. Its western edge is cut by the Ishinomaki-wan fault, believed to be the upward extension of the fault plane of the 2003 northern Miyagi earthquake as defined by seismic observations and reflection seismic surveys conducted after the earthquake. Integrated magnetic and gravity modeling suggests that the Kakeyama Formation, a Neogene conglomerate deposited in a half-graben along the Ishinomaki-wan fault during Miocene rifting, contains more granitic fragments toward the south than to the north in the Ishinomaki Plain.

Okuma, Shigeo; Kanaya, Hiroshi

2005-08-01

2

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. PMID:25425932

Nakae, Masanori; Senou, Hiroshi

2014-01-01

3

Kondyor Massif, Russia  

NASA Technical Reports Server (NTRS)

This is neither an impact crater nor a volcano. It is a perfect circular intrusion, about 10 km in diameter with a topographic ridge up to 600 m high. The Kondyor Massif is located in Eastern Siberia, Russia, north of the city of Khabarovsk. It is a rare form of igneous intrusion called alkaline-ultrabasic massif and it is full of rare minerals. The river flowing out of it forms placer mineral deposits. Last year 4 tons of platinum were mined there. A remarkable and very unusual mineralogical feature of the deposit is the presence of coarse crystals of Pt-Fe alloy, coated with gold. This 3-D perspective view was created by draping a simulated natural color ASTER composite over an ASTER-derived digital elevation model.

The image was acquired on June 10, 2006, and is located at 57.6 degrees north latitude, 134.6 degrees east longitude.

The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

2008-01-01

4

Evolution of stocks and massifs from burial of salt sheets, continental slope, northern Gulf of Mexico  

SciTech Connect

Salt structures in a 4000-km{sup 2} region of the continental slope, the northeast Green Canyon area, include stocks, massifs, remnant structures, and an allochthonous sheet. Salt-withdrawal basins include typical semicircular basins and an extensive linear trough that is largely salt-free. Counterregional growth faults truncate the landward margin of salt sheets that extend 30-50 km to the Sigsbee Escarpment. The withdrawal basins, stocks, and massifs occur within a large graben between an east-northeast-trending landward zone of shelf-margin growth faults and a parallel trend of counterregional growth faults located 48-64 km basinward. The graben formed by extension and subsidence as burial of the updip portion of a thick salt sheet produced massifs and stocks by downbuilding. Differential loading segmented the updip margin of the salt sheet into stocks and massifs separated by salt-withdrawal basins. Initially, low-relief structures evolved by trap-door growth as half-graben basins buried the salt sheet. Remnant-salt structures and a turtle-structure anticline overlay a salt-weld disconformity in sediments formerly separated by a salt sheet. Age of sediments below the weld is inferred to be be late Miocene to early Pliocene (4.6-5.3 Ma); age of sediments above the weld is late Pliocene (2.8-3.5 Ma). The missing interval of time (1-2.5 Ma) is the duration between emplacement of the salt sheet and burial of the sheet. Sheet extrusion began in the late Miocene to early Pliocene, and sheet burial began in the late Pliocene in the area of the submarine trough to early Pleistocene in the area of the massifs.

Seni, S.J. (Univ. of Texas, Austin (United States))

1991-03-01

5

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

6

Exhumation of the Sucking-Dayman Massif, Papua New Guinea  

NASA Astrophysics Data System (ADS)

Extension, evident as seafloor spreading in the Woodlark Basin, is actively propagating into the continental crust of Eastern Papua New Guinea, where regional ductile shear zones and brittle faults have recently exhumed metabasite rocks of the Suckling-Dayman Massif (9.5-10°S, 149-150°E). Utilising field, petrographic microscope and electron microprobe analyses, we investigate the structural and kinematic evolution of the Dayman shear zone, as well as the mineral chemistry of key metamorphic assemblages that define the shear zone fabrics. The results of this investigation indicate that the Dayman shear zone is an extensional shear zone with top to the north-northeast transport. Macro- and micro-kinematic indicators in the ductile shear zone include common S-C fabric, mantled porphyroclasts, `mica' fish, pressure shadows on pyrite, grain-scale faults, and asymmetric micro-boudinage. Kinematic indicators display a very regular sense of shear consistent with a simple shear dominated shear zone. The shear zone fabric is defined by dominantly greenschist facies metamorphic assemblages including abundant chlorite, epidote, albite and quartz with or without actinolite, titanite and calcite. Low strain pods within the shear zone display relict mafic igneous textures and relict clinopyroxene. The pods may include metamorphic lawsonite and blue amphibole in the mineral assemblage, suggestive of high P/T metamorphism of the metabasite massif prior to exhumation. Sedimentary rocks of the hanging wall include the Gwoira Conglomerate that contains clasts of low-grade (prehnite-pumpellyite facies) sheared metabasite. Metamorphic minerals identified in clasts include prehnite, pumpellyite, chlorite, albite, quartz and epidote. Monomineralic clasts include clinopyroxene, albite and quartz. The majority of clasts are consistent with a low-grade metabasite source that may or may not be sheared. A minor component of the clasts include graphitic intergrowths of quartz and feldspar, consistent with a pegmatitic to felsic source. Rare horizons in the Gwoira Conglomerate contain abundant shallow marine fossils. These observations suggest that the provenance for the Gwoira Conglomerate may include early exhumed low-grade metabasite of the Suckling- Dayman massif and that Gwoira Conglomerate may have been deposited on the flanks of the actively exhuming massif. A lack of metamorphism or ductile deformation in the Gwoira Conglomerate supports this interpretation.

Daczko, N. R.; Caffi, P.; Carroll, S. A.

2007-05-01

7

Igneous pyroxenes from metamorphosed anorthosite massifs  

Microsoft Academic Search

Anorthosites, mangerites and charnockites from metamorphosed anorthosite massifs (the Adirondacks and elsewhere) commonly contain coarsely exsolved pyroxenes with substantial amounts of exsolved orthopyroxene (in clinopyroxene) and clinopyroxene (in orthopyroxene). Electron microprobe reintegration of such pyroxenes yields compositions which indicate that pigeonite and subcalcic augite coexisted before metamorphic reequilibration. Equilibration temperatures of 1100 °±100 °C for anorthosite and 1000 °C±100 °C

S. R. Bohlen; E. J. Essene

1978-01-01

8

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

9

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

10

NORTHEAST PEL AGIC FISHERIES Northeast pelagic fisheries  

E-print Network

mackerel, Atlantic herring, bluefish, and butterfish.1 The fisheries on these stocks are seasonal. OVERHOLTz NMFS Northeast Fisheries Science Center Woods Hole Massachusetts Photo above: Butterfish. 1For Mackerel, Squid, and Butterfish FMP; bluefish by the joint MAFMC and Atlantic States Marine Fisheries

11

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

12

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

13

Experimental and Modeling Studies of Massif Anorthosites  

NASA Technical Reports Server (NTRS)

This termination report covers the latter part of a single research effort spanning several grant cycles. During this time there was a single title, "Experimental and Modeling Studies of Massif Anorthosites", but there were several contract numbers as the mode and location of NASA contract administration changed. Initially, the project was funded as an increment to the PI's other grant, "Early Differentiation of the Moon: Experimental and Modeling Studies", but subsequently it became an independent grant. Table 1 contains a brief summary of the dates and contract numbers.

Longhi, John

1999-01-01

14

NORTHEAST CLIMATE DATA  

EPA Science Inventory

The Northeast Regional Climate Center (NRCC) database includes a complete collection of historical climate data for the northeastern United States as well as continually updated National Weather Service observations and forecasts. In addition, daily temperature and precipitation ...

15

Interior view of northeast unit dining room, facing northeast toward ...  

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

Interior view of northeast unit dining room, facing northeast toward built-in shelves and window seat - MacDill Air Force Base, Double Non-Commissioned Officers' Quarters, 7418 Hanger Loop Drive, Tampa, Hillsborough County, FL

16

52. Ground floor, northeast corner, looking northeast at former delivery ...  

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

52. Ground floor, northeast corner, looking northeast at former delivery entries (archways have since been filled in) - Sheffield Farms Milk Plant, 1075 Webster Avenue (southwest corner of 166th Street), Bronx, Bronx County, NY

17

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

18

Rare earth element geochemistry and strontium isotopic composition of a massif-type anorthositic-charnockitic body: the Hidra Massif (Rogaland, SW Norway)  

Microsoft Academic Search

The Hidra Massif (Rogaland Complex, SW Norway) mainly consists of plagioclase cumulates (anorthosites and leuconorites), which grade progressively into a fine-grained (200 m). locally porphyritic, jotunitic rock towards the contact with the granulite facies gneisses. The massif is cross-cut by thin (10 cm up to 1 m) charnockitic dykes. The petrographical and geochemical evolution of the Hidra Massif can be

Daniel Demaiffe; Jan Hertogen

1981-01-01

19

Spatial thermal radiometry contribution to the Massif armoricain and the Massif central (France) litho-structural study  

NASA Technical Reports Server (NTRS)

The author has identified the following significant results. Although the limited number of images received did not permit construction of a thermal inertia map, important geological details were obtained in the areas of lithology and tectonics. Interpretation of day, night, and seasonal imagery resulted in differentiating broad calcareous and dolomitic units in the Causse Plateau. In the Massif amoricain, some granite massifs were delineated which were not observed by LANDSAT. Neotectonic faults were also revealed.

Scanvic, J. Y. (principal investigator)

1980-01-01

20

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

E-print Network

A key extensional metamorphic complex reviewed and restored: The Menderes Massif of western Turkey of the Menderes Massif in western Turkey, and subsequently a map-view restoration of its Neogene unroofing history

Utrecht, Universiteit

21

4. The armorican massif: a new interpretation  

NASA Astrophysics Data System (ADS)

In the Armorican Massif we discovered a stratigraphic and orogenic succession identical to the successions encountered in other countries which we studied for I.G.C.P. Project No. 2. As in Morocco, the regional rejuvenation was most intense during the first Proterozoic orogeny (Lihouides = Sveco-Fenno- Karelides = Hudsonides = Bouazzerides): only the Icartian relicts permit recognition of the importance of the Archaean Basement. Rejuvenation was also very strong during the Pan-Atlantic Thermotectonic Episode. It profoundly modified the ages the two Cadomian belts, which delayed recognition of their true ages and history. Cognécreated the term Pentevrian in 1959 for the ancient basement of the Brioverian. Leutwein (1968) dated it at ca. 1000 Ma, which is in fact the date of its rejuvenation. Its formations have been divided ( Roach et al., 1972) between the Archaean (2500-2700 Ma) and the Lihouian (= Karelian 1900-2000 Ma). Thus, it would be the equivalent of the American Grenvillian which also rejuvenated the Archaean-Hudsonian basement. 1000 Ma is not the age of the first Cadomian orogeny which is well-dated by the Coutances diorite (1300 Ma); it is therefore the age of the second Cadomian belt which was entirely rejuvenated by the Pan-Atlantic Episode. It is known that this last great Precambrian Armorican belt was levelled out by the pre-cover surface dating, also ca. 1000 Ma (Normandy). A redefinition of the Pentevrian would be desirable to avoid misunderstanding.

Choubert, Georges; Faure-Muret, Anne

22

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

23

Intrusion level of granitic massifs along the Hercynian belt: balancing the eroded crust  

Microsoft Academic Search

Hercynian granitoid intrusions form a long (3200 km) belt comparable in size to other batholiths in the world. Six massifs have been selected which encompass Cabeza de Araya (Extremadura, Spain), Guitiriz (Galicia, Spain), Pontivy and Mortagne (Brittany, France), La Marche (Massif Central, France) and Fichtelgebirge (Bavaria, Germany). Detailed gravity surveys over these massifs and subsequent inversion provide their shape at

J. L Vigneresse

1999-01-01

24

(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

25

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

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

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

28

Lithospheric Structure Along the Wide-Angle Seismic Reflection Transect of the Central Iberian Massif  

NASA Astrophysics Data System (ADS)

The Iberian Massif is the largest outcrop of the Late Paleozoic Variscan Orogen in western Europe. In May 2012, a spatially dense high resolution wide-angle seismic reflection profile ALCUDIA was acquired across the Central Iberian Massif. The ALCUDIA wide-angle profile investigates lithospheric structure of the Central Iberian Zone and a suture zone (the Central Unit). The experiment consisted in a main SW-NE line of receivers, c. 300 km long, and a supplementary transect, c. 35 km long, that sampled the crust beneath the Central Iberian System. The acoustic energy generated by 5 shots, c. 70 km apart, was recorded by over 900 TEXANS (single component, digital recording stations) from the IRIS-PASSCAL Instrument Center. Each shot consisted in 1 TM of explosives fired in a single 55-65 m deep borehole. Approximately, 100 stations were deployed across the Central Iberian System in an effort to map the topography of the crust mantle boundary beneath this mountain range. This design generated enough energy to be able to identify Pn and even mantle reflections. The preliminary analysis of the shot gathers reveals that the recorded events features relatively low frequencies (4-30 Hz). The processing of the shot gathers resulted into high amplitude reflective events within the upper crust and strong PmP phases. From the southwest to northeast, the interpreted PmP arrivals are located at c. 11 s and c. 12 s (normal incidence traveltime) respectively. The ALCUDIA wide-angle profile provided a detailed P-wave velocity structural model and complemented the previously acquired normal incidence deep seismic profile ALCUDIA. The velocity model obtained by forward modelling constraints the composition of the crust and upper mantle. The upper crust is located at c. 13 km and the Moho is in the 32-36 km range, equates to normal incidence reflection profile ALCUDIA. Existing knowledge indicates that the mid-lower crust along the southern part of the CIZ is characterized by relatively high mafic compositions.

Ehsan, Siddique Akhtar; Carbonell, Ramon; Cembrowski, Marcel; Marti, David; Gil, Alba; Marzan, Ignacio; Ayarza, Puy; Martinez-Poyatos, David; Simancas, Jose Fernando; Azor, Antonio

2014-05-01

29

Fluid circulation systems in the Alpine External Crystalline Massifs  

NASA Astrophysics Data System (ADS)

At mid-crustal levels, rock permeability is believed to be very low except in active fault/shear zones. In sedimentary rocks undergoing tectonic burial during collisional shortening, fluid flow is thus considered to be a small-scale process restricted to the sedimentary unit, until the fluid system locally opens during strain localization in fault/shear zones. During the Alpine collision, the European proximal passive margin (Dauphinois/Helvetic domains, including the External Crystalline Massifs, ECM: Aar, Mont Blanc, Aiguilles Rouges, Oisans massifs) was buried at mid-crustal depth under the internal units and was subsequently shortened and exhumed with contrasting kinematics. Indeed, some of the main tectonic units are sedimentary nappes detached from their basement while other are linked to main basement shear zones. In this context, many studies of fluid system evolution have been published, mainly focused on the largest tectonic units (e.g., Morcles nappe) and/or on thrust/shear zones with large displacement (e.g., Glarus thrust). In this contribution, we focused on tectonic structures located in the Oisans massif where small amount of shortening occurred (smaller than in the northern ECM, Mont Blanc and Aar). We performed geochemical and microthermometric analyses on calcite + quartz vein and host-rock samples to document and discuss the fluid source and pathway, the scale of circulation and the fluid-rock interactions. The fluid system in the Oisans ECM is compared to the fluid systems in other ECM and can be considered as an early and/or less shortened analogue. In the Oisans massif cover, the fluid system is generally closed, except locally above the main basement shear zones where signatures of basement-derived fluids were identified by trace element analysis. In contrast, in the Mont Blanc massif, fluids were channelized in the main basement shear zones, while in the Morcles nappe (i.e., the presumable cover of the Mont Blanc), deep fluids may have been channelized in the sheared reverse limb. Further north, in the Glarus thrust (i.e., the largest shear zone of the Aar massif), deep fluids were clearly channelized in the thrust zone. This highlights the influence on fluid systems of both the structural style and the amount of shortening that vary along the strike of the External Alps.

Boutoux, Alexandre; Bellahsen, Nicolas; Verlaguet, Anne; Lacombe, Olivier

2014-05-01

30

The Apollo 17 samples: The Massifs and landslide  

NASA Technical Reports Server (NTRS)

More than 50 kg of rock and regolith samples, a little less than half the total Apollo 17 sample mass, was collected from the highland stations at Taurus-Littrow. Twice as much material was collected from the North Massif as from the South Massif and its landslide (the apparent disproportionate collecting at the mare sites is mainly a reflection of the large size of a few individual basalt samples). Descriptions of the collection, documentation, and nature of the samples are given. A comprehensive catalog is currently being produced. Many of the samples have been intensely studied over the last 20 years and some of the rocks have become very familiar and depicted in popular works, particularly the dunite clast (72415), the troctolite sample (76535), and the station 6 boulder samples. Most of the boulder samples have been studied in Consortium mode, and many of the rake samples have received a basic petrological/geochemical characterization.

Ryder, Graham

1992-01-01

31

Allochthony of the Chartreuse Subalpine massif: explosion-seismology constraints  

NASA Astrophysics Data System (ADS)

The deep structure of the Chartreuse Subalpine massif has been investigated with explosionseismology techniques involving several longitudinal and fan profiles. The main results obtained suggest evidence of a refraction level at shallow depth (2 km) and three deep-seated reflectors (4.5. 8 and 10 km). The shallow level could be the Urgonian limestone slab; the three deep reflectors could be associated with autochthonous and parautochthonous pre-Triassic basements. The discussion of these results mainly concerns the tectonic significance of the shallow, unambiguous refractor: detailed balanced cross-sections of the massif request the presence of a new major overthrust in the sedimentary filling of the Subalpine chains. With an extent of at least 15 km, it opens up wide possibilities for oil traps in the Tertiary molasse underneath.

Thouvenot, F.; Ménard, G.

32

The deformation of the Egersund–Ogna anorthosite massif, south Norway: finite-element modelling of diapirism  

Microsoft Academic Search

This paper aims at testing the mechanical relevance of the petrological model of anorthosite massif diapiric emplacement. The Egersund–Ogna massif (S. Norway) is of particular interest because recent petrological and geochronological data constrain the initial geometry, emplacement conditions and timing (about 2 m.y.). The formation of this anorthosite massif is in agreement with the classical petrological model, in which accumulation

J. D. Barnichon; H. Havenithb; B. Hofferb; R. Charlier; D. Jongmans; J. C. Duchesne

1999-01-01

33

Geochemistry, geochronology, and cathodoluminescence imagery of the Salihli and Turgutlu granites (central Menderes Massif, western Turkey): Implications for  

E-print Network

(central Menderes Massif, western Turkey): Implications for Aegean tectonics Elizabeth J. Catlos a, Turkey a b s t r a c ta r t i c l e i n f o Article history: Received 2 July 2008 Received in revised tectonics Turkish Aegean region Geochronology Menderes Massif The Menderes Massif (western Turkey

34

5GOLOGIE DE LA FRANCE, N 2, 2012 Le skarn ferrifre de Dilette (Massif armoricain)  

E-print Network

'est développé dans l'auréole de métamorphisme de contact du massif de granodiorite hercynien de Flamanville. L of the Flamanville Hercynian granodioritic massif. The Devonian host-rocks turned into a hornfels series

Paris-Sud XI, Université de

35

Crustal structures of the Rhinegraben and the Massif Central grabens: An experimental approach  

Microsoft Academic Search

Two of the most important segments of the west European Rift, the Rhinegraben and the Massif Central grabens, show in plan and in cross section a very different crustal structure. The Rhinegraben and the Massif Central grabens are roughly parallel and formed in the same time interval (i.e., Priabonian\\/Oligocene). The Rhinegraben in the north is a single half graben of

Laurent Michon; Olivier Merle

2000-01-01

36

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

37

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

38

Northeast Regional Biomass Energy Program  

SciTech Connect

The Northeast Regional Biomass Program (NRBP) is entering its ninth year of operation. The management and the objectives have virtually remained unchanged and are stated as follows. The program conducted by NRBP has three basic features: (1) a state grant component that provides funds (with a 50 percent matching requirement) to each of the states in the region to strengthen and integrate the work of state agencies involved in biomass energy; (2) a series of technical reports and studies in areas that have been identified as being of critical importance to the development of biomass energy in the region; and (3) a continuous long range planning component with heavy private sector involvement that helps to identify activities necessary to spur greater development and use of biomass energy in the Northeast.

O'Connell, R.A.

1992-04-01

39

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

40

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

41

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

42

Petrogenesis of magmatic iron-titanium deposits associated with Proterozoic massif-type anorthosites.  

E-print Network

??The petrogenesis of magmatic Fe-Ti oxide ores associated with massif-type andesine anorthosites is investigated through detailed studies of the world-class Tellnes ilmenite deposit (SW Norway),… (more)

Charlier, Bernard

2007-01-01

43

Petrogenesis of massif anorthosites: a perspective from St. Urbain, Quebec  

SciTech Connect

The St. Urbain massif is a post-orogenic anorthosite pluton (approx. 500 km/sup 2/) emplaced within the central high-grade granulite terrain of the Grenville structural province. In contrast to other Grenville anorthosites, primary magmatic features are largely preserved. The massif consists predominantly of andesine anorthosite (AA) of remarkable purity containing abundant plagioclase megacrysts. AA has high K/sub 2/O (approx. 2 wgt.%), very high Sr contents (approx. 1200 ppm) and highly fractionated, low REE contents. Features of AA provide the following insights into anorthosite origins: (1) Crystallization from anorthositic magmas, as evidenced by early crystallization of abundant antiperthitic plag, and igneous emplacement of AA dikes and veins into older, unrelated labradorite anorthosite; (2) in situ crystallization of pyroxene after plag, with no direct evidence of earlier crystallization of mafic minerals from a basaltic parent magma; (3) limited differentiation during crystallization, indicated by small variation in plag and opx and limited variations in plag Sr and REE contents; (4) the involvement of water, suggested by the late igneous crystallization of biotite and the localized grain-boundary replacement of plag by calcic myrmekite (An/sub 80/ + qtz). (5) high temperature, relatively oxidizing conditions, indicated by magmatic hemoilmenite +/- rutile and rare ferropseudobrookite in AA and associated ores. AA crystallized from highly feldspathic, relatively oxidized, somewhat hydrous parent magma with little trapped melt. The development of a hyperfeldspathic parent magma with the requisite geochemical features can be ascribed to hydrous partial melting of mafic (to intermediate) rocks at deep crustal or greater depths, leaving a garnetiferous residue.

Gromet, L.P.; Dymek, R.F.

1985-01-01

44

The exhumation of an HP ophiolitic massif (Voltri Massif, Western Alps): insight from 3D numerical models  

NASA Astrophysics Data System (ADS)

The high-pressure ophiolitic Voltri Massif outcrops at the eastern sector of the Ligurian Western Alps. Highly deformed serpentinite and metasediments wrap eclogite to blueschist facies metagabbro and metabasalt bodies; these lenses have foliated rims and preserve undeformed textures in their cores revealing a strong strain-partitioning. The mechanism that drove the exhumation of these high-pressure rocks has been already analyzed in detail using 2D numerical simulations (Malatesta et al., 2011). In particular they reproduce the subduction process that in the Mesozoic affected the Alpine branch of the Western Tethys. In the Ligurian area subduction was intraoceanic and involved a non-layered oceanic lithosphere with gabbro as discrete bodies inside serpentinized peridotites that were overlain by a limited basaltic cover. The comparison of field and petrologic evidence with model results showed that the exhumation of the high-pressure Voltri rocks was related to the formation of a serpentinite channel above the downgoing slab. This low-viscosity area formed after the hydration of the mantle-wedge rocks by the uprising fluids that migrate from the slab. Buoyancy of the high-pressure serpentinitic mélange that included slices of the slab finally triggered their exhumation. Alpine subduction was however oblique (Marroni and Treves, 1998; Malusà et al., 2011) thus including a trench-parallel left-lateral motion and not only a trench-normal motion as in 2D simulations. We have studied this particular setting through 3D numerical simulations starting from the setup of 2D models. We therefore designed an oceanic basin (500 km-wide) surrounded by continental margins and floored by a non-layered oceanic lithosphere. Subduction starts at a prescribed weak zone in the mantle; the weak zone defines the plate margins geometry. We test different "lateral" geometries of the weak zone (e.g. continuous, segmented). We designed "continuous" weak zones either parallel or increasingly moving away from the continental margins. Moreover, we tested the effect on subduction/exhumation dynamics of varying values of the trench-parallel component of convergence-rate vector. The comparison among field and petrologic data of the Voltri Massif rocks with 3D numerical models results will finally provide a more detailed description of the subduction dynamics acting in the Ligurian-Piedmontese basin and in particular will shed more light on the mechanism that drove the exhumation of the high-pressure ophiolitic Voltri Massif.

Malatesta, C.; Gerya, T.; Crispini, L.; Federico, L.; Scambelluri, M.; Capponi, G.

2012-04-01

45

LES INDUSTRIES A COMPOSANTE LITHOLOGIQUE MIXTE AU PALEOLITHIQUE MOYEN DANS LE MASSIF ARMORICAIN  

E-print Network

103 LES INDUSTRIES A COMPOSANTE LITHOLOGIQUE MIXTE AU PALEOLITHIQUE MOYEN DANS LE MASSIF ARMORICAIN différentielle des matières premières exploitées au sein d'une même industrie malgré des aptitudes à la taille et " économique. Mots-Clefs : Paléolithique moyen, Massif armoricain, industries lithiques, matières premières

Paris-Sud XI, Université de

46

LE MASSIF DU TABURNO-CAMPOSAURO, UNE MONTAGNE CALCAIRE EN POSITION DE CHARNIRE L'CHELLE  

E-print Network

charnière dans l'Apennin méridional, du fait du morcellement orographique qui permet l'établissement d morcellement redevable à la néotectonique plio-pléistocène en extension, le massif juxtapose de vigoureux IV #12;28 II - UN MASSIF AU COEUR D'UN DISPOSITIF ORO-HYDROGRAPHIQUE DE MORCELLEMENT De l

Paris-Sud XI, Université de

47

Morphodynamics of the Mont Blanc massif (European Alps) in a changing cryosphere  

NASA Astrophysics Data System (ADS)

One of the most glacierized and elevated areas in the European Alps, the Mont Blanc massif illustrates how accelerated change affects the cryosphere and its related morphodynamics in high mountain environments, especially since the termination of the Little Ice Age. Contrasts between the NW side, gentle and heavily glaciated, and the SE side, steep and rocky, as between local faces of which slope angle and aspect are extremely varying, make the study of the massif particularly relevant. Glacier shrinkage is strong at low elevation - even if less than in other Alpine massifs - whereas supraglacial debris covers develop on all the glaciers, several being debris-covered since the nineteenth century. Lowering of glacier surface also affects areas of the accumulation zone. If modern glaciology is carried out in the massif since several decades, study of the permafrost is under development since few years only, especially in the rockwalls. Many hazards are related to glacier dynamics. Outburst floods, especially from englacial pockets, ice avalanches from warm-based to cold-based glaciers, and possible effects of glacier shrinkage on the rock slope stability, are generally increasing with the current decrease or even the vanishing of glaciers. Active permafrost degradation is likely triggering rockfalls and even rock avalanches, participating to the chains of processes resulting from the high relief of the massif. Generated hazards could increasingly endangered population and activities of the massif valleys.

Deline, P.; Gardent, M.; Magnin, F.; Ravanel, L.

2012-04-01

48

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

49

P-T-t evolution of eclogite/blueschist facies metamorphism in Alanya Massif: time and space relations with HP event in Bitlis Massif, Turkey  

NASA Astrophysics Data System (ADS)

The Alanya Massif, which is located to the south of central Taurides in Turkey, presents a typical nappe pile consisting of thrust sheets with contrasting metamorphic histories. In two thrust sheets, Sugözü and Gündo?mu? nappes, HP metamorphism under eclogite (550-567 °C/14-18 kbar) and blueschist facies (435-480 °C/11-13 kbar) conditions have been recognized, respectively. Whereas the rest of the Massif underwent MP metamorphism under greenschist to amphibolite facies (525-555 °C/6.5-7.5 kbar) conditions. Eclogite facies metamorphism in Sugözü nappe, which consists of homogeneous garnet-glaucophane-phengite schists with eclogite lenses is dated at 84.8 ± 0.8, 84.7 ± 1.5 and 82 ± 3 Ma (Santonian-Campanian) by 40Ar/39Ar phengite, U/Pb zircon and rutile dating methods, respectively. Similarly, phengites in Gündo?mu? nappe representing an accretionary complex yield 82-80 Ma (Campanian) ages for blueschist facies metamorphism. During the exhumation, the retrograde overprint of the HP units under greenschist-amphibolite facies conditions and tectonic juxtaposition with the Barrovian units occurred during Campanian (75-78 Ma). Petrological and geochronological data clearly indicate a similar Late Cretaceous tectonometamorphic evolution for both Alanya (84-75 Ma) and Bitlis (84-72 Ma) Massifs. They form part of a single continental sliver (Alanya-Bitlis microcontinent), which was rifted from the southern part of the Anatolide-Tauride platform. The P-T-t coherence between two Massifs suggests that both Massifs have been derived from the closure of the same ocean (Alanya-Bitlis Ocean) located to the south of the Anatolide-Tauride block by a northward subduction. The boundary separating the autochthonous Tauride platform to the north from both the Alanya and Bitlis Massifs to the south represents a suture zone, the Pamphylian-Alanya-Bitlis suture.

Çetinkaplan, Mete; Pourteau, Amaury; Candan, Osman; Koralay, O. Ersin; Oberhänsli, Roland; Okay, Aral I.; Chen, Fukun; Kozlu, Hüseyin; ?engün, F?rat

2014-12-01

50

meeting summary- First Northeast Regional Operational Workshop.  

NASA Astrophysics Data System (ADS)

The First Northeast Regional Operational Workshop, focusing on hydrometeorology in the northeastern United States, was held 21-23 September 1999 in Albany, New York. Sessions in local and mesoscale modeling, lake-effect snow, hydrology, heavy precipitation forecasting and events, operational techniques, and northeast severe convection were presented. A summary of workshop presentations is provided.

Auciello, Eugene P.

2000-06-01

51

Geology and Tectonic Evolution of the Kazda? Massif (NW Anatolia)  

NASA Astrophysics Data System (ADS)

In the northwestern part of Anatolia along the Izmir-Ankara Suture Zone, the Kazda? and Uluda? 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 marbles. In the Kazda? metamorphics, metaophiolites have been described additionally (Okay et al., 1991; Yalt?rak and Okay, 1994; Okay et al., 1996; Duru et al., 2004). These metamorphic complexes were considered to form the basement of the Sakarya Continent tectonically overlain by the Early Permian (Topuz et al., 2004) to Late Triassic (Okay and Monie, 1997; Okay et al., 2002) Karakaya Complex. This old basement and the Karakaya Complex were suggested to be unconformably overlain by Liassic and younger platform limestones and detritals (Alt?ner et al., 1991). In the literature, it has also been suggested that the Kazda? Massif had experienced polyphase metamorphism, first during Carboniferous time, second during Early Triassic and third during Tertiary (Bingöl, 1971; Okay et al., 1996; Okay and Sat?r, 2000). In this study we mapped the Kazda? Massif on 1/25000 scale, studied its internal stratigraphy and structures and performed some petrologic analyses and radiogenic age determinations. Stratigraphically in the lower part of the Kazda? metamorphic sequence, there is a part of an oceanic crust represented by metaultramafic rocks and gabbroic metacumulates. Geochemistry of these banded metagabbros show a mid-oceanic affinity. This oceanic crust is overlain, along an unconformity, by a platform type marble succession. At the base of the marbles, there is a basal conglomerate, clasts of which derived from the underlying ultramafic sequence. Thick white marble sequence is overlain along a gradational boundary with a metadetrital succession consisting of quartz mica schist and mica schists that are partly converted into migmatites. There are mafic metavolcanic intervals along the lower gradational zone and within various levels of the metadetrital unit and some marble lenses. The platform sequence resembles to the Mesozoic platform of the Sakarya continent and the underlying oceanic crust might be a part of a Paleotethys Ocean. The Kazda? succession had been subjected to high-grade migmatitic metamorphism accompanied by syntectonic granite emplacements. Zircons of these metagranites yielded U-Pb ages of 27.6 ± 6.8 Ma and 207Pb/206 Pb evaporation ages of 30 Ma. The metadetrital sequences and migmatites show scattered 207Pb/206 Pb zircon evaporation ages ranging from 301.4 ± 2.8 Ma, 274.9 ± 3.1 Ma, 169.3 ± 3.5 Ma indicating mixed ages with strong Alpine imprints. After metamorphism the Kazda? metamorphic sequence was internally imbricated by southward compression and the ultramafic sequence thrust on the top of the platform sequence. During this southward thrusting two different nappes emplaced successively on top of the Kazda? metamorphics from the north. The first nappe consists of a part of Karakaya Complex and the second one, at the top, consists of the Çetmi Melange. Our mapping results clearly show that all these nappe packages including the internally imbricated Kazda? metamorphics are cut by undeformed young granites of 18-24 Ma age (Okay and Sat?r, 2000). Exhumation of the Kazda? metamorphics was a result of the southerly imbrication which occurred after the emplacement of the syntectonic metagranites (29-30 Ma) and before the intrusion of the cross cutting young granites (~ 21 Ma) The present topographic relief of the mountain was the result of younger vertical movements dissipated among numerous E-W trending high angle normal faults observed on its southern slope facing to Edremit Bay. References Altiner , D., Koçyi?it, A., Farinacci, A., Nicosia, U. and Conti, M.A. (1991) Jurassic-Lower Cretaceous stratigraphy and paleogeographic evolution of the southern part of the northwestern Anatolia. Geologica

Erdo?an, B.; Akay, E.; Hasözbek, A.; Sat?r, M.; Siebel, W.

2009-04-01

52

Pyroxenites - Melting or Migration?: Evidence from the Balmuccia massif  

NASA Astrophysics Data System (ADS)

The recognition of pyroxenites in the mantle, combined with their lower solidus temperatures than peridotite, have been proposed as contributors to melting (Pertermann and Hirschmann, 2003; Sobolev et al, 2005; 2007). Geochemical fingerprints of this process invoke an unspecified 'pyroxenite' as the putative source. In reality, mantle pyroxenites are diverse (Downes, 2007), requiring that their mode of origin and compositional variability be addressed. Due to the excellent preservation and exposure of the Balmuccia massif, it has become an archetype for orogenic peridotites, providing information on their composition, field relationships and metamorphic history (Shervais and Mukasa, 1991; Hartmann and Wedepohl, 1993; Rivalenti et al., 1995; Mazzucchelli et al., 2009). The Balmuccia massif consists of fertile lherzolite with subordinate harzburgite and dunite and is riddled with pyroxenite bands, which fall into two suites - Chrome-Diopside (Cr-Di) and Aluminous-Augite (Al-Aug), a pairing present in most massif peridotites. Two-pyroxene thermometry gives temperatures of 850±25°C at 1-1.5 GPa, 500°C lower than asthenospheric mantle at that pressure, meaning they do not preserve their original, high temperature mineralogy. Decimetre-sized Cr-Di bands (?75% CPX, 25% OPX) occur as initially Ol-free and bound by refractory dunite, but, as the bands are rotated into the plane of foliation, they mechanically incorporate olivine. Al-Aug veins (60% CPX, 25% OPX, 15% Sp) discordantly cut the body, intruding lherzolites which show enrichments in Fe, Al and Ti adjacent to the dykes. Both the Cr-Di suite and the Al-Aug series have indistinguishable Sr-, Nd-isotopic compositions to the host peridotite (Mukasa and Shervais, 1999). The major element compositions of pyroxenes in the Cr-Di bands and those in the surrounding peridotites are identical. Together with isotopic evidence, this suggests a local source, not only chemically but spatially, where a very low degree melt (?2%) acts as a transport medium for the pyroxenes and segregates them into dyke-like structures (melt/rock = 0.05-0.1), analogous to 'pressure-solution' creep (Dick and Sinton, 1979). The presence of a melt is required by their REE contents, with moderate La/SmN (0.3 - 0.4) with near-flat HREE (1 < Gd/YbN < 1.1), in contrast to the lherzolites, which preserve highly fractionated La/SmN (0.03 - 0.3) and positively-sloping HREE (0.6 < Gd/YbN < 0.8). Models for their formation as cumulates from a melt are untenable, as, upon decompression, olivine is invariably the first phase to crystallise, thereby drastically reducing Mg# and Cr# to values lower than those in the Cr-Di bands. The Al-Aug veins have lower Mg# (85-87) than the peridotites and Cr-Di series (?90). However, CPXs in both the Al-Aug and the lherzolite preserve REE patterns which are subparallel to, but twice as enriched as those in the normal lherzolites. This characteristic can be explained by focusing of a small, (4%) locally-sourced melt similar to that which transported the Cr-Di pyroxenes. This melt was focused to a melt/rock ratio of 0.6 - 0.7, and crystallised to form the cumulus rocks of the Al-Augite suite. The extreme, heavy ?57Fe values observed in both the pyroxenite and adjacent lherzolite (+ 0.75 per mille) also point to a low-degree melt.

Sossi, Paolo; O'Neill, Hugh

2014-05-01

53

Cooling Rates in the Atlantis Massif Oceanic Core Complex  

NASA Astrophysics Data System (ADS)

We report Ca-in-olivine geospeedometry on 7 samples from IODP Hole 1309D, drilled into the Atlantis Massif oceanic core complex at 30°N just west of the mid-Atlantic Ridge. Cooling rates were first calculated using the method of Coogan et al., (2002; 2007) on a total of 20 olivine grains in olivine gabbros and troctolitic gabbros. Apparent rates ranged from 2000 to 72,000 °C/my, with the fastest rates from two samples at about 1000 mbsf, and slower rates from five samples between 294 and 499 mbsf. At shallower depths olivine is almost entirely absent due to alteration. The data was then reprocessed using the recent Fe-dependent calibration of Ca partitioning between olivine and two-pyroxene assemblages (Shejwalkar and Coogan, Lithos, in press). Olivine compositions range from Fo87 to Fo80 in the upper set of samples and Fo69-71 in the two deeper samples. Calculated cooling rates are reduced in all samples except the most Fo-rich, and by a factor of 15 in the most Fe-rich olivines. The result is a much smaller spread in mean cooling rates to 960-5610 °C/my, without any clear depth-dependence. These rates are consistent with published average rates from isotopic closure temperatures, and are comparable to published data from ODP Hole 735b in a similar setting on the southwest Indian Ridge (Coogan et al., 2007), although inclusion of Fe-dependence will probably reduce those rates considerably. Gabbros in the Atlantis Massif have been exhumed by slip on an oceanic detachment fault, but without the extensive high temperature mylonitization seen in ODP Hole 735b. We present models (using Comsol Multiphysics) of the thermal evolution of oceanic core complexes incorporating footwall exhumation and hydrothermal circulation, which appears to have focussed within the detachment fault zone in Hole 1309D. Cooling rates are faster than predicted by purely conductive models but slower than models in which active hydrothermal circulation extends to the depth of gabbro emplacement.

McCaig, A. M.; Dixit, A.; Titarenko, S.

2013-12-01

54

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

55

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

56

Northeast Regional Planetary Data Center  

NASA Technical Reports Server (NTRS)

In 1980, the Northeast Planetary Data Center (NEPDC) was established with Tim Mutch as its Director. The Center was originally located in the Sciences Library due to space limitations but moved to the Lincoln Field Building in 1983 where it could serve the Planetary Group and outside visitors more effectively. In 1984 Dr. Peter Schultz moved to Brown University and became its Director after serving in a similar capacity at the Lunar and Planetary Institute since 1976. Debbie Glavin has served as the Data Center Coordinator since 1982. Initially the NEPDC was build around Tim Mutch's research collection of Lunar Orbiter and Mariner 9 images with only partial sets of Apollo and Viking materials. Its collection was broadened and deepened as the Director (PHS) searched for materials to fill in gaps. Two important acquisitions included the transfer of a Viking collection from a previous PI in Tucson and the donation of surplused lunar materials (Apollo) from the USGS/Menlo Park prior to its building being torn down. Later additions included the pipeline of distributed materials such as the Viking photomosaic series and certain Magellan products. Not all materials sent to Brown, however, found their way to the Data Center, e.g., Voyager prints and negatives. In addition to the NEPDC, the planetary research collection is separately maintained in conjunction with past and ongoing mission activities. These materials (e.g., Viking, Magellan, Galileo, MGS mission products) are housed elsewhere and maintained independently from the NEPDC. They are unavailable to other researchers, educators, and general public. Consequently, the NEPDC represents the only generally accessible reference collection for use by researchers, students, faculty, educators, and general public in the Northeast corridor.

Schultz, Peter H.; Saunders, Stephen (Technical Monitor)

2005-01-01

57

Stratigraphic and metamorphic inversions in the central Menderes Massif: a new structural model  

NASA Astrophysics Data System (ADS)

The Menderes Massif is a large area of dominantly Tertiary metamorphic rocks in western Turkey. It is bordered in the west by the Cycladic Metamorphic Complex with Eocene high-pressure/low-temperature (HP/LT) metamorphism. In the Central Menderes the Ayd?n mountains are made up of a thrust stack of Eocene age. At the base of the thrust stack, greenschist-facies Paleozoic metasediments of the Menderes Massif form an inverted stratigraphic sequence. The Barrovian-type metamorphism is also inverted with garnet-bearing metapelites lying over the lower-grade biotite-bearing metapelites. The P-T conditions in the garnet zone are estimated as 530°C and 8 kbar. This schist sequence of the central Menderes Massif is interpreted as the inverted lower limb of a major southward closing recumbent fold, with the southern Menderes Massif representing a section from the near hinge of this fold. The Paleozoic metamorphic rocks of the central Menderes Massif are tectonically overlain by gneiss klippen possibly originating from the sheared and southward translated core of the Menderes fold. Lying also tectonically over the Paleozoic metamorphic rocks is a major thrust sheet belonging to the Cycladic metamorphic complex. It consists of garnet micaschist, Mesozoic marble, serpentinite and amphibolitised eclogite. Although it has a highly sheared internal structure, it probably represents an initially coherent sequence that has undergone HP/LT metamorphism during the Eocene. The Ayd?n mountains are dominated by contractional structures with subordinate extensional structures.

Okay, Aral I.

2001-03-01

58

Fluctuations of Raikot Glacier during the past 70 years: a case study from the Nanga Parbat massif, northern Pakistan  

Microsoft Academic Search

The Himalaya has some of the largest glacier concentrations outside the polar regions. Despite this, long-term measurements detecting the impact of global warming and changing precipitation patterns on glaciers are rare. The Nanga Parbat massif in northern Pakistan is an exception. The cartographer and glaciologist R. Finsterwalder investigated glacier dynamics of this mountain massif in the 1930s, and several other

Susanne Schmidt; Marcus Nüsser

2009-01-01

59

Evidence for Excess Argon during High Pressure Metamorphism in the Dora Maira Massif (Western Alps, Italy), using an  

E-print Network

1 Evidence for Excess Argon during High Pressure Metamorphism in the Dora Maira Massif (Western metamorphism of the Dora Maira Massif in the western Alps is a well established and intensively studied event. However, the age of peak metamorphism and early cooling remains controversial. 40 Ar- 39 Ar step

Boyer, Edmond

60

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

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

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

63

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

64

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

65

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

66

A Subnational Perspective for Comparative Research: Education and Development in Northeast Brazil and Northeast Thailand.  

ERIC Educational Resources Information Center

Case studies of northeast Brazil and northeast Thailand highlight the importance of a subnational approach to comparative research. Compares geographic and economic conditions, regional culture, ethnicity and gender issues, migration patterns, religion, literacy, and educational underdevelopment. Points out that neglect of a region and its people…

Fry, Gerald; Kempner, Ken

1996-01-01

67

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

68

Spatial coincidence of rapid inferred erosion with young metamorphic massifs in the Himalayas  

Microsoft Academic Search

A spatially distributed rate-of-erosion index (EI) based on models of bedrock river incision documents a strong spatial correspondence between areas of high erosion potential and young metamorphic massifs as well as structural highs throughout the Himalayas. The EI is derived from slopes and drainage areas calculated from a hydrologically cor- rected digital elevation model (GTOPO30) combined with precipitation data (IIASA)

David P. Finlayson; David R. Montgomery; Bernard Hallet

2002-01-01

69

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 and an anhydrite vein in a gabbro provide temperature constraints of 150­200 °C for late circulating fluids along primarily con- trolled by seawater­gabbro interaction and subsequent serpentinization. The basement rocks

Gilli, Adrian

70

Textural, isotopic and REE variations in spinel peridotite xenoliths, Massif Central, France  

Microsoft Academic Search

Sr and Nd isotope analyses and REE patterns are presented for a suite of well-documented mantle-derived xenoliths from the French Massif Central. The xenoliths include spinel harzburgites, spinel lherzolites and some pyroxenites. They show a wide range of textures from undeformed protogranular material through porphyroclastic to equigranular and recrystallised secondary types. Textural differences are strongly linked to trace element geochemistry

Hilary Downes; Claude Dupuy

1987-01-01

71

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

72

Time of formation and genesis of yttrium-zirconium mineralization in the Sakharjok massif, Kola Peninsula  

NASA Astrophysics Data System (ADS)

The Kola geotectonic province in the northeastern Fennoscandian Shield accommodates a significant number of alkaline rock massifs differing in age. They are of mantle and mantle-crustal origin (alkali and nepheline syenites, carbonatites) and related to crustal sources (Neoarchean alkali granites). Among them, the Neoarchean Sakharjok nepheline syenite massif is related to the oldest intrusions of this kind bearing yttrium-zirconium mineralization. The crystallization of alkali syenite pertaining to the first intrusive phase of the intrusive Sakharjok massif is dated to 2645 ± 7 Ma, and this implies that this syenite postdated alkali granites (2.66-2.67 Ga). To date the yttrium-zirconium ore, we applied the local U-Pb method to zircon crystals occurring in the mineralized block hosted in nepheline syenite. The earliest fragments of zircon crystallized 1832 ± 7 Ma ago; the age of metamorphism is estimated at 1784 ± 13 Ma. These dates indicate the Paleoproterozoic age of the yttrium-zirconium mineralization, which was formed as a product of fluid reworking of the Neoarchean nepheline syenite of the Sakharjok massif.

Vetrin, V. R.; Skublov, S. G.; Balashov, Yu. A.; Lyalina, L. M.; Rodionov, N. V.

2014-12-01

73

STRUCTURAL MAKE-UP AND GEOPHYSICAL PROPERTIES OF BRITTLE FAULT ZONES IN THE EASTERN AAR MASSIF,  

E-print Network

unstable conditions when encountered during the excavation of a tunnel. In the eastern Aar massif. Results from this study highlight the potential for detecting these difficult zones by means of drilling ahead of the tunnel face, combined with the measurement of several geophysical parameters. INTRODUCTION

74

The eastern Himalayan syntaxis is host to the actively deforming metamorphic massif,  

E-print Network

ABSTRACT The eastern Himalayan syntaxis is host to the actively deforming metamorphic massif and geochrono- logic information on metamorphic rocks from the Namche Barwa­Gyala Peri region. Pressure-temperature data are combined with U-Th-Pb ages of monazite and titanite in an effort to trace the metamorphic

Kidd, William S. F.

75

Structure, age, and ore potential of the Burpala rare-metal alkaline massif, northern Baikal region  

NASA Astrophysics Data System (ADS)

The Burpala alkaline massif is a unique geological object. More than 50 Zr, Nb, Ti, Th, Be, and REE minerals have been identified in rare-metal syenite of this massif. Their contents often reach tens of percent, and concentrations of rare elements in rocks are as high as 3.6% REE, 4% Zr, 0.5% Y, 0.5% Nb, 0.5% Th, and 0.1% U. Geological and geochemical data show that all rocks in the Burpala massif are derivatives of alkaline magma initially enriched in rare elements. These rocks vary in composition from shonkinite, melanocratic syenite, nepheline and alkali syenites to alaskite and alkali granite. The extreme products of magma fractionation are rare-metal pegmatites, apatite-fluorite rocks, and carbonatites. The primary melts were related to the enriched EM-2 mantle source. The U-Pb zircon ages of pulaskite (main intrusive phase) and rare-metal syenite (vein phase) are estimated at 294 ± 1 and 283 ± 8 Ma, respectively. The massif was formed as a result of impact of the mantle plume on the active continental margin of the Siberian paleocontinent.

Vladykin, N. V.; Sotnikova, I. A.; Kotov, A. B.; Yarmolyuk, V. V.; Sal'nikova, E. B.; Yakovleva, S. Z.

2014-07-01

76

Dykes, faults and palaeostresses in the Teno and Anaga massifs of Tenerife (Canary Islands)  

Microsoft Academic Search

A structural field study was made of 578 sheet intrusions (mostly dykes) and 153 (mostly normal) faults dissecting the Anaga and Teno massifs, where a complex volcanic succession of Tertiary age (the ‘Old Basaltic Series’) representing the shield-building stage of Tenerife (Canary Islands) crops out. Many of the intrusions, mostly sub-vertical mafic dykes, are emplaced by multiple magma injections, with

L. B. Marinoni; A. Gudmundsson

2000-01-01

77

Crustal structure of the Bohemian Massif in the light of seismic refraction data  

NASA Astrophysics Data System (ADS)

The Bohemian Massif is one of the largest stable outcrops of pre-Permian rocks in Central and Western Europe. It forms the easternmost part of the Variscan Belt, which developed approximately between 500 and 250 Ma during a stage of large-scale crustal convergence, collision of continental plates and microplates, and possibly also subduction. It consists mainly of low- to high-grade metamorphic and plutonic Palaeozoic rocks. The area of the Bohemian Massif can be subdivided into various tectonostratigraphic units separated by faults, shear zones or thrusts trending roughly in a SW-NE direction, and reflecting varying influence of the Cadomian and Variscan orogenies: the Saxothuringian, Teplá-Barrandian, Moldanubian and Moravo-Silesian. Geographically, it comprises the area of the Czech Republic, partly Austria, Germany and Poland. While the post-collisional history of the Variscan Bohemian Massif is relatively clear, the kinematics of plate movements before and during collision is still subject of debates. To investigate such a complex structure, the Bohemian Massif has been covered by a network of seismic experiments as a result of a massive international cooperative effort in central Europe. Detailed analyses of the data from the main profiles of the CELEBRATION 2000, ALP 2002, and SUDETES 2003 refraction and wide-angle reflection seismic experiments show crustal and uppermost mantle structure of the massif and delimit the continuation of various tectonic units in depth. The differences in seismic velocities reflect, to some extent, the structural variances and give some indications for tracing of crust-forming processes during individual tectonic events. Lower crust in the Saxothuringian exhibits complicated structure, ranging from a highly reflective lower crustal layer above Moho with a strong velocity contrast at the top of this layer. Another possible explanation can be a double Moho or the Moho with some lateral topography. This complicated lower crust extends in a depth range of 26-35 km and is characteristic for the Saxothuringian unit, which was subject to the eastward subduction. The Moldanubian in the central part usually seen as the root of the Bohemian Massif is characterized by the deepest (39 km) and the most pronounced Moho within the whole massif with a strong velocity contrast. The lower crust at the eastern margin of the Bohemian Massif is characterized by elevated velocities and high velocity gradient, which seems to be a characteristic feature of the Moravo-Silesian. References Hrubcová, P., and W. H. Geissler. The Crust-Mantle Transition and the Moho beneath the Vogtland/West Bohemian Region in the Light of Different Seismic Methods, Stud. Geophys. Geod., 53, 275--294, 2009 Hrubcová P., P. ?roda, and CELEBRATION 2000 Working Group, Crustal structure at the easternmost termination of the Variscan belt based on CELEBRATION 2000 and ALP 2002 data, Tectonophysics, 460, 55-75, doi:10.1016/j.tecto.2008.07.009, 2008 Hrubcová P., P. ?roda, A. Špi?ák, A. Guterch, M. Grad, R. Keller, E. Brückl and H. Thybo, Crustal and uppermost mantle structure of the Bohemian Massif based on data from CELEBRATION 2000 Experiment, J. Geophys. Res., 110, B11305, doi:10.1029/2004JB003080, 2005 Hrubcová, P., P. ?roda, M. Grad, W.H. Geissler, A. Guterch, J. Vozár, E. Heged?s, and Sudetes 2003 Working Group. From the Variscan to the Alpine Orogeny - crustal structure of the Bohemian Massif and Western Carpathians in the light of the SUDETES 2003 seismic data, GJI, submitted

Hrubcova, Pavla

2010-05-01

78

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

79

Smithian and Spathian (Early Triassic) ammonoid assemblages from terranes: Paleoceanographic and paleogeographic implications  

Microsoft Academic Search

Early Triassic paleobiogeography is characterised by the stable supercontinental assembly of Pangea. However, at that time, several terranes such as the South Kitakami Massif (SK), South Primorye (SP) and Chulitna (respectively, and presently located in Japan, eastern Russia and Alaska) straddled the vast oceans surrounding Pangea. By means of quantitative biogeographical methods including Cluster Analysis, Non-metric Multidimensional Scaling and Bootstrapped

Arnaud Brayard; Gilles Escarguel; Hugo Bucher; Thomas Brühwiler

2009-01-01

80

Geological setting and petrogenesis of symmetrically zoned, miarolitic granitic pegmatites at Stak Nala, Nanga Parbat - Haramosh Massif, northern Pakistan  

USGS Publications Warehouse

Miarolitic granitic pegmatites in the Stak valley in the northeast part of the Nanga Parbat - Haramosh Massif, in northern Pakistan, locally contain economic quantities of bi- and tricolored tourmaline. The pegmatites form flat-lying sills that range from less than 1 m to more than 3 m thick and show symmetrical internal zonation. A narrow outer or border zone of medium-to coarse-grained oligoclase - K-feldspar - quartz grades inward to a very coarse-grained wall zone characterized by K-feldspar - oligoclase - quartz - schorl tourmaline. Radiating sprays of schorl and flaring megacrysts of K-feldspar (intermediate microcline) point inward, indicating progressive crystallization toward the core. The core zone consists of variable mixtures of blocky K-feldspar (intermediate microcline), oligoclase, quartz, and sparse schorl or elbaite, with local bodies of sodic aplite and miarolitic cavities or "pockets". Minor spessartine-almandine garnet and lo??llingite are disseminated throughout the pegmatite, but were not observed in the pockets. The pockets contain well-formed crystals of albite, quartz, K-feldspar (maximum microcline ?? orthoclase overgrowths), schorl-elbaite tourmaline, muscovite or lepidolite, topaz, and small amounts of other minerals. Elbaite is color-zoned from core to rim: green (Fe2+- and Mn2+-bearing), colorless (Mn2+-bearing), and light pink (trace Mn3+). Within ???10 cm of the pegmatites, the granitic gneiss wallrock is bleached owing to conversion of biotite to muscovite, with local quartz and albite added. Schorl is disseminated through the altered gneiss, and veins of schorl with bleached selvages locally traverse the wallrock up to 1 m from the pegmatite contact. The schorl veins can be traced into the outer part of the wall zone, which suggests that they formed from aqueous fluids derived during early saturation of the pegmatite-forming leucogranitic magma rich in H2O, F, B, and Li. Progressive crystallization resulted in a late-stage sodic magma and abundant aqueous fluids. Two late stages of volatile escape are recognized: the first stage caused pressure-quenching of the last magma, which produced aplite and caused albitization (An3 to An8) of earlier crystallized K-feldspar and oligoclase. The second stage, released during the rupture of miarolitic cavities, produced platy albite ("cleavelandite," An1) locally associated with F-rich moscovite and elbaite. Albitization is likely due to cooling of alkali-fluoride-dominated fluids at less than 2 kbar pressure. The pegmatites are derived from Himalayan leucogranitic magma emplaced prior to 5 Ma into granulitic gneiss that was at 300?? to 550??C and 1.5 to 2 kbar. The pegmatites were emplaced during uplift of the Haramosh Massif, since they cross-cut ductile normal faults but are cut by brittle normal faults. Economically important pink tourmaline mineralization formed in pockets concentrated near the crest of a broad antiform, as a result of trapping of late magmatic aqueous fluids that had become Fe-poor owing to the prior crystallization of schorl.

Laurs, B.M.; Dilles, J.H.; Wairrach, Y.; Kausar, A.B.; Snee, L.W.

1998-01-01

81

Autocontamination of the oceanic lithospheric mantle? example of the Beni Bousera ultramafic massif  

NASA Astrophysics Data System (ADS)

The peridotites from the Beni Bousera (Morocco) ultramafic massif contains Na-Ti-Al-rich clinopyroxenes characterizing fertile mantle rocks which did not experience significant melt extraction. By contrast, most of these clinopyroxenes are depleted in LREE and, from this point of view, the host rocks look very much like peridotites associated with the ophiolites, i.e. mantle rocks derived from the asthenosphere which have suffered a high degree of partial melting. This paradox may result from autocontamination of the oceanic lithospheric mantle for the following reasons: A - The ultramafic massif comprises lenses of corundum-bearing grt-pyroxenites most probably derived from HP recrystallization of gabbro dykes. A number of grt-pyroxenite display a wide range of oxygen isotopic ratios (Pearson et al., 1991) probably related to sea water contamination stage. Diamond pseudomorphs in some pyroxenites have very light carbon isotopic ratios (Pearson et al., 1989). All these facts support an ultimate origin of the massif in the oceanic lithospheric mantle. B - The present top of the massif is characterized by the tectonic dispersion of grt-pyroxenites within surrounding sp-peridotites. As a result of low temperatures (< 800oC), stress overpressure (200 Mpa) and bulk Fe-enrichment, the mechanical mixture recrystallized as a grt-lherzolite, with olivine much richer in iron (Fo84-86) than in "normal" uncontaminated sp-peridotite (Fo90). This suggests that mechanical mixing of cross-cutting mafic dikes into surrounding peridotite should be a very efficient process at higher temperatures and should play a very important role in the upper mantle as a mechanism of re-homogenization and re-enrichement. C - Tectonically mixing a small amount of gabbro into depleted peridotite at depth may account for the present day composition of cpx in the Beni Bousera ultramafic massif and, generally speaking in most orogenic lherzolite bodies, although melt-rock interaction can also modify cpx composition.

Kornprobst, J.; Woodland, A.; Tabit, A.

2003-04-01

82

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

83

NO{sub x} control in the northeast  

SciTech Connect

Nitrogen Oxide (NOx) control measures in the Northeast are summarized. The following topics are discussed: air quality in the Northeast, ozone transport region NOx initiatives, summary of the NOx budget model rale, banking, and rule components consistent in all states.

Belanger, J.A. [Bureau of Air Management, Hartford, CT (United States)

1996-11-01

84

Northeast Creek Bridge. North East, Cecil Co., MD. Sec. 1201, ...  

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

Northeast Creek Bridge. North East, Cecil Co., MD. Sec. 1201, MP 51.03. - Northeast Railroad Corridor, Amtrak route between District of Columbia/Maryland state line & Maryland/Delaware state line, Baltimore, Independent City, MD

85

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

86

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

87

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

88

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

89

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

90

1. View from the northeast, looking upstream (southwest) toward bridge's ...  

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

1. View from the northeast, looking upstream (southwest) toward bridge's northeast elevation - Enloe Bridge No. 90021, Spanning Red River of North between Minnesota & North Dakota on County State Aid Highway 28, Wolverton, Wilkin County, MN

91

10. Lighthouse boathouse and granite wharf, view north northeast, southwest ...  

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

10. Lighthouse boathouse and granite wharf, view north northeast, southwest and southeast sides of boathouse, west and south sides of dock - Whitehead Light Station, Whitehead Island, East northeast of Tenants Harbor, Spruce Head, Knox County, ME

92

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

93

Interior view of northeast unit master bedroom, looking into sleeping ...  

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

Interior view of northeast unit master bedroom, looking into sleeping porch, facing northeast - MacDill Air Force Base, Double Non-Commissioned Officers' Quarters, 7418 Hanger Loop Drive, Tampa, Hillsborough County, FL

94

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

95

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

96

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

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

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

99

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

100

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

101

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

102

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

103

7. Oil house, view northeast, west and south sides ...  

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

7. Oil 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

104

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

105

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

106

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

107

Paleomagnetic results from Cenozoic volcanics of Lusatia, NW Bohemian Massif  

NASA Astrophysics Data System (ADS)

Lusatia is situated in the NE continuation of the Ohre Rift (OR) behind Lusatian Overtrust. Compared to the neighbouring volcanic complex of the ?eské stredohorí Mts. (CS) inside the OR. The scattered occurrences of basaltic bodies in Lusatia are spread on wider area. This can be caused by different tectonic development of the regions and from derived erosional conditions. The Lusatian Overtrust, high-order tectonic structure running across the course of the OR, separates Lusatian region into two different geological areas where Cretaceous sediments or granodiorites of Lusatian Massif represent the country rock of the Cenozoic volcanism, respectively. The age of volcanic activity ranges from 19 to 33 Ma, it's proved by newly obtained Ar-Ar data from Freiberg and K-Ar data from Debrecen. Forty two scattered remnants of Cenozoic volcanic products were sampled to get paleomagnetic data. The superficial volcanics with detectable geological position and volcanology were chosen preferentially, several dykes and separate vents were sampled as well. Paleomagnetic research was processed on more than 500 samples which were demagnetized using alternate field in the range 0-80 mT. Q-ratio was counted to prevent the lightning influence - solitary volcanic occurrences build positive morphology and thus, they are prone to be targeted by lightnings. The values of Q-ratio predominantly span from 0.1 to 7.0; those samples having the value over 10, were excluded for evaluation. The mean paleomagnetic direction (MPD) was acquired from several samples on each sampling site. Declination and Inclination show values of 11.8 deg and 62.7 deg (?95 = 9.3 deg) for normal polarity, or 182.1 deg and -59.2 deg (?95 = 6.1 deg) for reverse polarity, respectively,The corresponding paleolatitude of 41.9 deg was counted from the Inclination. This is 1000 km to the South, compared to recent position. The dispersions of the MPD are relatively wide. This coincides well with the idea of long-lasting volcanic activity in Lusatia and supports the radiometric results. Duration of volcanic activity in Lusatia is similar to CS volcanic complex in OR and differs from these which are outside this structure. In combination of reversal test and the wide dispersion of MPD, the centred secular variation was proved. It allowed counting of the virtual geomagnetic pole (VGP) position on coordinates 79.9 N and 167.5 E (dp = 6.1 deg, dm = 7.9 deg), which corresponds with the Late Tertiary apparent polar wander path for Europe. The VGP counted from volcanics in Lusatia is relatively close to the data obtained mainly from the CS Volcanic Complex (85.09 N and 160.88 E). The paleomagnetic results of volcanic rocks from Lusatia, obtained up to now, show great similarity to that ones from the CS Volcanic Complex. This is another argument for an idea of joint volcanic development of these regions. It also contributes to the entitled use of the CS lithostratigraphic units in Lusatia.

Schnabl, P.; Cajz, V.; Tietz, O.; Buechner, J.; Suhr, P.; Pecskay, Z.; Cizkova, K.

2013-05-01

108

Long lasting paleolandscapes stability of the French Massif Central during the Mesozoic  

NASA Astrophysics Data System (ADS)

Regional geodynamical evolution is mainly constrained by the sedimentary record in the basins. Usually, little is known about geodynamics of the peripheral areas and even less on the evolution of the basement areas. Continental unconformities are essential to estimate erosion rates of basement and to model the crustal dynamics that control subsidence of surrounding sedimentary basins but also uplift and erosion on their edges. Dating such unconformities has always been the stumbling block while it is a prerequisite to constrain geodynamical models. Paleomagnetism has been proven as a suitable tool to date ferrugineous paleoweathering features. The method has been applied to paleoweathering occurrences resting on the Massif Central crystalline basement as well as to paleoweathering features affecting the crystalline basement itself. The remanence measurements were obtained at the Paleomagnetic Laboratory of the Institut Physique du Globe de Paris and data analyses were carried out using PaleoMac 5 software (Cogné, 2003). Relative dating of the paleoweathering profiles have been acquired by comparing the recorded paleomagnetic poles from the analysed samples to the apparent polar wandering path of the Eurasian plate (Edel et Duringer, 1997 ; Besse and Courtillot, 2003). Thick red kaolinitic formations rest locally on the Massif Central basement. They are generally bounded by the Tertiary grabens and buried by the Oligocene formations. Thus these azoic red formations have classically been ascribed to the "Siderolithic" formations of Eocene-Oligocene age. They show many pedogenic features (termites burrows, illuviation and hydromorphic features and nodules) and strong relationships with paleolandscape organisation (leaned against fault scarps, infilling paleovalleys, etc.). Macro and micromorphological arrangements show that these formations are in situ paleosols. Paleomagnetic ages range from 160 Ma (Late Jurassic) in the centre of the Massif Central to 140 Ma (Early Cretaceous) in the northern parts of the massif (Ricordel et al., 2005; Ricordel, 2007;). These new ages, fairly older than the expected ones, bring considerable changes in the palaeogeographic evolution of the Massif Central during Mesozoic and Cenozoic. Basement rocks (granites, gneiss, rhyolites and even Permo-Carboniferous sediments) show often pinkish facies throughout the Massif Central. It has been shown that these pink facies are albitised (mainly pseudomorphic replacement of the primary plagioclases into albite and alteration of the biotite into chlorite) (Schmitt, 1992; Parcerisa et al., 2009). These albitised facies are arranged in a clear succession against (?) the Triassic unconformity that gives significant constraints about their development in relation with the Triassic palaeosurface. Secondary albite and chlorite contain minute hematite inclusions, which have been dated, using paleomagnetism, to be Triassic in age (245 Ma) (Ricordel et al., 2007). Given that the alterations are of the same age as the unconformity, it then follows that the albitised facies be related to the Triassic palaeosurface and be used to track back the Triassic palaeosurface through wide crystalline areas, even far away from the Mesozoic cover. Palaeomagnetic analyses allowed dating a large range of paleoweathering features for which no objective datings were previously available. Spatial and temporal distributions of the paleoweathering features and related unconformities provide key arguments to unravel the geodynamic evolution of the Massif Central. ?Triassic, Late Jurassic and Tertiary unconformities are superimposed on large areas of the Massif Centrall. This implies very little erosion of the crystalline basement since Triassic time, as shown by the widespread preservation of the Triassic albitized facies. Since the red kaolinitic paleosols of Late Jurassic/Early Cretaceous age rest directly on the basement rocks, large areas of the Massif Central were uncovered at this period, and more importantly no Jurassic cover was preserved (if such a cover w

Ricordel-Prognon, C.; Thiry, M.; Theveniaut, H.; Lagroix, F.

2009-04-01

109

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

110

Rock massif temperature changes measurement with regard to thermal responses generated by a thermal response test device  

NASA Astrophysics Data System (ADS)

In this article are presented results from application of fiber optical DTS system within long term research of temperature energy accumulation in Paskov rock massif. In this area was established special measuring station for that purpose, because rock massif in Paskov area has ideal properties for temperature changes measurement. The twelve geothermal boreholes were drilled during this research, which were then used for rock massif heating by Thermal Response Test device. With the help of DTS system was observed how the temperature distribution and penetration in between boreholes in rock massif is. Thanks to the DTS system we were able to determine the Thermal Response Test device heating power influence on the nearest monitoring boreholes.

Latal, Jan; Vitasek, Jan; Koudelka, Petr; Siska, Petr; Liner, Andrej; Papes, Martin; Witas, Karel; Hejduk, Stanislav; Vasinek, Vladimir

2013-05-01

111

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

112

A Snowfall Impact Scale Derived from Northeast Storm Snowfall Distributions  

Microsoft Academic Search

A Northeast snowfall impact scale (NESIS) is presented to convey a measure of the impact of heavy snowfall in the Northeast urban corridor, a region that extends from southern Virginia to New England. The scale is derived from a synoptic climatology of 30 major snowstorms in the Northeast urban corridor and applied to the snowfall distribution of 70 snowstorms east

Paul J. Kocin; Louis W. Uccellini

2004-01-01

113

Northeast Regional Exchange, Annual Report, January 1982.  

ERIC Educational Resources Information Center

The activities of Northeast Regional Exchange, Inc. (NEREX) during its first year of operation are delineated in this report. The newest member of the national network of Research and Development Exchanges (RDx), this service agency was established to promote educational improvement in the seven northeastern states: Connecticut, Maine,…

1982

114

COASTAL 2000 MONITORING IN THE NORTHEAST  

EPA Science Inventory

Coastal 2000 is a partnership between the U.S. Environmental Protection Agency and coastal states to develop a national coastal monitoring program. The Northeast portion of Coastal 2000 includes states from Delaware to Maine. This joint effort will provide a nationwide assessment...

115

NORTHEAST PACIFIC ALBACORE OCEANOGRAPHY SURVEY, 1961  

E-print Network

PACIFIC ALBACORE OCEANOGRAPHY SURVEY, 1961 by R. W. Owen, Jr. Fishery Biologist Research Bureau444 NORTHEAST PACIFIC ALBACORE OCEANOGRAPHY SURVEY, 1961 by R. W. Owen, Jr. SPECIAL SCIENTIFIC OCEANOGRAPHY SURVEY, 1961 by R, W. Owen, Jr. United States Fish and Wildlife Service Special Scientific Report

116

NORTHEAST FISHERIES OBSERVER PROGRAM INCIDENT REPORT INSTRUCTIONS  

E-print Network

Enforcement (OLE) has provided a hotline number (1-800-853-1964) for the reporting of urgent/time sensitive, they should call 911. If you have reported an incident to the OLE hotline number or 911, you are stillNORTHEAST FISHERIES OBSERVER PROGRAM INCIDENT REPORT INSTRUCTIONS The Incident Report (found under

117

Stratigraphic Cross Section of Northeast Texas  

NSDL National Science Digital Library

Cretaceous sedimentary rocks of Northeast Texas provide important clues about paleogeography, paleotectonics, and sea level fluctuation. This website describes several of these rock units and the geologic information they supply. An unpublished report with a thorough discussion, map, cross section, and numerous references is provided. Specific topics include Cretaceous stratigraphy, lithostratigraphic and biostratigraphic correlation, ammonites, Western Interior Seaway, Skull Creek Seaway, paleogeography, and paleotectonics.

Keith, Minor; Cretaceousfossils.com

118

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 activities and can help you to spot a problem weed before it takes over the entire pasture. Control options will be determined by the type of weed, size of plant and budget. Mechanical treatments like mowing are an effective

Jawitz, James W.

119

North Massif lithologies and chemical compositions viewed from 2-4 mm particles of soil sample 76503  

NASA Technical Reports Server (NTRS)

We identify the lithologic and compositional components of soil 76503 based on INAA of 243 2-4-mm particles and 72 thin sections from these and associated 1-2-mm particles (76502). We present a statistical distribution of the major compositional types as the first step of a detailed comparative study of the North and South Massifs. The soil sample was collected well away from any boulder and is more representative of typical North Massif material than any single large rock or boulder sample. So far, our examination of the 76503 particles has provided a better definition of precursor igneous lithologies and their petrogenetic relationships. It has enabled us to refine the nature of mixing components for the North Massif less than 1-mm fines. It has confirmed the differences in lithologies and their proportions between materials of the North and South Massifs; e.g., the North Massif is distinguished by the absence of a 72275-type KREEP component, the abundance of a highly magnesian igneous component, and the absence of certain types of melt compositions found in the South Massif samples.

Bishop, Kaylynn M.; Jolliff, Bradley L.; Korotev, Randy L.; Haskin, Larry A.

1992-01-01

120

Établissement des étages de végétation holocène : vers la modélisation complète d’un massif  

Microsoft Academic Search

Pollen and macro-remains were analysed in a sixth site (La Gouille 1?800 m) of the Chaîne des Hurtières (northern French Alps). Nine A.M.S. dates support the chronology. Thus, the establishment of the vegetation belt of a massif can be modelled in the northern French Alps. Betula invaded sub-Alpine grasslands as early as 10 000 14C BP. Around 9 600 14C BP

Fernand David

2001-01-01

121

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

122

Alpe Arami: A Peridotite Massif from Depths of More Than 300 Kilometers  

Microsoft Academic Search

The abundance of FeTiO_3 and chromite precipitates in olivine of the Alpe Arami peridotite massif, Switzerland, requires a much higher solubility for highly charged cations than is found in mantle xenoliths from depth of 250 kilometers. Three previously unknown crystal structures of FeTiO_3 were identified that indicate that the originally exsolved phase was the high-pressure perovskite polymorph of ilmenite, implying

Larissa Dobrzhinetskaya; Harry W. Green II; Su Wang

1996-01-01

123

Inclusions in chrysolite from the Kovdor Massif: Genetic and gemmological significance  

Microsoft Academic Search

Gem-quality chrysolite (peridot) from a phlogopite deposit related to the Kovdor ultrabasic-alkaline massif in the Kola Peninsula,\\u000a Russia, was studied using a variety of techniques (optical mineralogical microscopy, chemical, Mössbauer spectroscopy, and\\u000a photoluminescence) to determine its chemical composition, the Fe2+\\/Fe3+ ratio, refraction indexes, density, as well as to examine inclusions in it. Much attention was devoted to the microprobe\\u000a identification

S. V. Sokolov; S. A. Yarmishko; N. I. Chistyakova

2006-01-01

124

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

125

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

126

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

127

Permian bivalve mollusks of Northeast Asia  

NASA Astrophysics Data System (ADS)

Bivalve mollusks are very important in the Permian biota of Northeast Asia. During the Permian the bivalves had different distribution patterns both in space and time, and their occurrence was governed by many factors related to water depth and geodynamic conditions. In Northeast Asia there were two main bivalve paleocommunities, shallow and deep sea bivalves. Through the Permian, the bivalves began to dominate benthic assemblages. There are five major stages in their developmental history: Asselian-Artinskian, Kungurian, Roadian-Wordian, Capitanian-Early Wuchiapingian and Late Changhsingian. The mid-Kungurian stage was characterized by a maximum in bivalve diversity, whereas the Late Kungurian, Early Capitanian and latest Permian had the lowest bivalve diversity.

Biakov, Alexander S.

2006-03-01

128

Time series of the northeast Pacific  

NASA Astrophysics Data System (ADS)

In July 2006, the North Pacific Marine Science Organization (PICES) and Fisheries & Oceans Canada sponsored the symposium “Time Series of the Northeast Pacific: A symposium to mark the 50th anniversary of Line P”. The symposium, which celebrated 50 years of oceanography along Line P and at Ocean Station Papa (OSP), explored the scientific value of the Line P and other long oceanographic time series of the northeast Pacific (NEP). Overviews of the principal NEP time-series were presented, which facilitated regional comparisons and promoted interaction and exchange of information among investigators working in the NEP. More than 80 scientists from 8 countries attended the symposium. This introductory essay is a brief overview of the symposium and the 10 papers that were selected for this special issue of Progress in Oceanography.

Peña, M. Angelica; Bograd, Steven J.

2007-10-01

129

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

130

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

131

Part-Time Farming in Northeast Texas.  

E-print Network

JANUARY THE AGRICULTURAL AND MECHANICAL COLLEGE OF TEXAS TEXAS AGRICULTURAL EXPERIMENT STATION R. D. LEWIS, DIRECTOR, COLLEGE STATION. TEXAS IN COOPERATION WITH THE U. S. DEPARTMENT OF AGRICULTURE 632320 - This analysis of part-the farming... is part of a broad the income levels, income sources and farm and human patterns of the.88,W rural o area of Northeast Texas (Tearas Agricultural Bulletin 940, Incomes of Rural Families in No A major farm adjustmen part-time farming, or a greater...

Martin, James R.; Southern, John H.

1961-01-01

132

Garzon Massif basement tectonics: A geopyhysical study, Upper Magdalena Valley, Colombia  

NASA Astrophysics Data System (ADS)

The mechanics and kinematics of basement tectonic uplifts, such as the Laramide Rocky Mountain orogeny, remain poorly understood and controversial. The debate continues in part because of the limited number of well-documented present day analogs. The Garzon Massif rising between the Upper Magdalena Valley and the Llanos Basin of Colombia is an active basement uplift with well, seismic, gravity, and magnetic data available. In the past 10 Ma, PreCambrian age granitic rocks of the Garzon Massif have been uplifted and displaced against Cretaceous and Tertiary sediments of the Upper Magdalena Valley along the Garzon fault. Aerogravimetric data calibrated by well data and 2D seismic data were used to model the geometry of the Garzon fault and the top of basement (Saldana Fm) in 2 dimensions. The density models provide an independent estimate of fault orientation. A high density airborne gravity and magnetic survey were flown over the Garzon fault in 2000, including 2,663 line km along 1 x 5 and 1 x 4 km flight lines at elevations of 2564 and 4589 m above mean sea level. An initial depth model was derived from the well logs, seismic reflection profile, and down-hole velocity surveys. Airborne gravity data was used to produce a Bouguer anomaly gravity map. Average rock densities were estimated from density logs, seismic velocities, and formation rock types. The regional gravity field was estimated and 2-dimensional forward models were constructed with average densities from the wells, seismic velocities, and rock types, and the initial depth model. Since the model fit is dependent on the density assumed for the Garzon Massif rocks, multiple densities and dip angles were tested. The gravity analysis indicates that the Garzon fault is a basement thrust fault dipping at a shallow angle under the Massif. Best-fit models show a true dip of 12 to 17 degrees to the southeast. A regional density and magnetic susceptibility model of the entire Massif is consistent with dense basement rocks throughout the Garzon Massif and asymmetric loading (sedimentary basin is much deeper on NW flank -- Upper Magdalena Valley). Crust thickens to the NW toward the Central Cordillera. Euler deconvolution of the magnetic field shows pronounced NE-SW trending features under the Massif which are interpreted as faults bounding a possible pre-Cambrian sedimentary rift graben. Retrodeformed 2D regional models indicate 13 km of shortening on the Garzon basement thrust in the last 12 Ma. Approximately 9 km of shortening occurred on the SE marginal basement thrust fault, probably also in the last 12 Ma. This was preceded by approximately 43 km of shortening by thin-skinned imbricate thrusting to the southeast (12 - 25 Ma). This study provides a well-documented example of an active basement uplift on low angle thrust faults.

Bakioglu, Kadir Baris

133

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

134

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.

135

Miocene incorporation of peridotite into the Hercynian basement of the Maghrebides (Edough massif, NE Algeria): Implications for the geodynamic evolution of the  

E-print Network

Miocene incorporation of peridotite into the Hercynian basement of the Maghrebides (Edough massif Keywords: Peridotite Western Mediterranean Monazite U­Pb geochronology Laser ablation A laser ablation ICP a leucocratic diatexite collected in close proximity to a small peridotite massif incorporated into the lower

Demouchy, Sylvie

136

Nepheline syenites and related magmatic fluids in the Ditr u Alkaline Massif, Transylvania, Romania Andrs Fall *, Robert J. Bodnar and Csaba Szab  

E-print Network

Nepheline syenites and related magmatic fluids in the Ditr u Alkaline Massif, Transylvania, Romania at the northern end, and undersaturated alkaline rocks (nepheline syenites) predominating in the central and eastern margin of the massif. The nepheline syenite is a coarse- to medium-grained rock that occurs

Bodnar, Robert J.

137

29. TURBINE HALL, ORIGINAL CONDENSER, PARTIALLY DISASSEMBLED, LOOKING NORTHEAST ...  

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

29. TURBINE HALL, ORIGINAL CONDENSER, PARTIALLY DISASSEMBLED, LOOKING NORTHEAST - Philadelphia Electric Company, Richmond Power Station, Southeast end of Lewis Street along Delaware River, Philadelphia, Philadelphia County, PA

138

Northeast and northwest elevations. View to south Flint Creek ...  

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

Northeast and northwest elevations. View to south - Flint Creek Hydroelectric Project, Powerhouse, Approximately 3 miles southeast of Porters Corner on Powerhouse Road, Philipsburg, Granite County, MT

139

Perspective view of east entrance from northeast National Home ...  

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

Perspective view of east entrance from northeast - National Home for Disabled Volunteer Soldiers, Pacific Branch, Mental Health Building, 11301 Wilshire Boulevard, West Los Angeles, Los Angeles County, CA

140

View of exterior circumferential path at northeast side of building ...  

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

View of exterior circumferential path at northeast side of building beneath trellis, looking southeast - National Zoological Park, Bird House, 3001 Connecticut Avenue NW, Washington, District of Columbia, DC

141

6. Northeast elevation of single bin. Delaware, Lackawanna & ...  

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

6. Northeast elevation of single bin. - Delaware, Lackawanna & Western Railroad, Scranton Yards, Scrap Platform, 350 feet South of South Washington Avenue & River Street, Scranton, Lackawanna County, PA

142

4. Perspective view of platform, looking northeast. Delaware, Lackawanna ...  

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

4. Perspective view of platform, looking northeast. - Delaware, Lackawanna & Western Railroad, Scranton Yards, Scrap Platform, 350 feet South of South Washington Avenue & River Street, Scranton, Lackawanna County, PA

143

3. MAGAZINE P STAIRWAY ENCLOSURE, LOOKING NORTHEAST. NIKE Missile ...  

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

3. MAGAZINE P STAIRWAY ENCLOSURE, LOOKING NORTHEAST. - NIKE Missile Base C-84, Underground Storage Magazines & Launcher-Loader Assemblies, Easternmost portion of launch area, Barrington, Cook County, IL

144

DETAIL VIEW OF SOUTH FRONT DOORS, FACING NORTHEAST. Douglas ...  

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

DETAIL VIEW OF SOUTH FRONT DOORS, FACING NORTHEAST. - Douglas Aircraft Company Long Beach Plant, Aircraft Wing & Fuselage Assembly Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

145

VIEW OF CENTRAL INTERIOR SPACE, FACING NORTHEAST. Douglas Aircraft ...  

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

VIEW OF CENTRAL INTERIOR SPACE, FACING NORTHEAST. - Douglas Aircraft Company Long Beach Plant, Aircraft Parts Shipping & Receiving Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

146

40 CFR 81.55 - Northeast Pennsylvania-Upper Delaware Valley Interstate Air Quality Control Region.  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Northeast Pennsylvania-Upper Delaware Valley Interstate...Control Regions § 81.55 Northeast Pennsylvania-Upper Delaware Valley Interstate...Quality Control Region. The Northeast Pennsylvania-Upper Delaware Valley...

2013-07-01

147

40 CFR 81.55 - Northeast Pennsylvania-Upper Delaware Valley Interstate Air Quality Control Region.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false Northeast Pennsylvania-Upper Delaware Valley Interstate...Control Regions § 81.55 Northeast Pennsylvania-Upper Delaware Valley Interstate...Quality Control Region. The Northeast Pennsylvania-Upper Delaware Valley...

2012-07-01

148

40 CFR 81.55 - Northeast Pennsylvania-Upper Delaware Valley Interstate Air Quality Control Region.  

... 2014-07-01 false Northeast Pennsylvania-Upper Delaware Valley Interstate...Control Regions § 81.55 Northeast Pennsylvania-Upper Delaware Valley Interstate...Quality Control Region. The Northeast Pennsylvania-Upper Delaware Valley...

2014-07-01

149

40 CFR 81.55 - Northeast Pennsylvania-Upper Delaware Valley Interstate Air Quality Control Region.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false Northeast Pennsylvania-Upper Delaware Valley Interstate...Control Regions § 81.55 Northeast Pennsylvania-Upper Delaware Valley Interstate...Quality Control Region. The Northeast Pennsylvania-Upper Delaware Valley...

2011-07-01

150

40 CFR 81.251 - Northeast Kansas Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Northeast Kansas Intrastate Air Quality Control Region...Control Regions § 81.251 Northeast Kansas Intrastate Air Quality Control Region. The Northeast Kansas Intrastate Air Quality Control...

2010-07-01

151

40 CFR 81.251 - Northeast Kansas Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Northeast Kansas Intrastate Air Quality Control Region...Control Regions § 81.251 Northeast Kansas Intrastate Air Quality Control Region. The Northeast Kansas Intrastate Air Quality Control...

2012-07-01

152

40 CFR 81.251 - Northeast Kansas Intrastate Air Quality Control Region.  

...2014-07-01 2014-07-01 false Northeast Kansas Intrastate Air Quality Control Region...Control Regions § 81.251 Northeast Kansas Intrastate Air Quality Control Region. The Northeast Kansas Intrastate Air Quality Control...

2014-07-01

153

40 CFR 81.251 - Northeast Kansas Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Northeast Kansas Intrastate Air Quality Control Region...Control Regions § 81.251 Northeast Kansas Intrastate Air Quality Control Region. The Northeast Kansas Intrastate Air Quality Control...

2013-07-01

154

40 CFR 81.251 - Northeast Kansas Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Northeast Kansas Intrastate Air Quality Control Region...Control Regions § 81.251 Northeast Kansas Intrastate Air Quality Control Region. The Northeast Kansas Intrastate Air Quality Control...

2011-07-01

155

40 CFR 81.65 - Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region.  

Code of Federal Regulations, 2010 CFR

... Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region... Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region...The Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality...

2010-07-01

156

40 CFR 81.65 - Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region.  

Code of Federal Regulations, 2012 CFR

... Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region... Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region...The Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality...

2012-07-01

157

Geological structures and geochronology of the Gonam Complex in the Gyeonggi Massif, South Korea  

NASA Astrophysics Data System (ADS)

Geological structures and geochronology of the Gonam Complex in the Gyeonggi Massif, South Korea You Hong Kihm and Sung Won Kim The Gonam complex is exposed in the westernmost part of the Gyeonggi Massif, which is recently thought be related with Triassic collision of China. This complex consists of various lithologies such as quartz schist, mica schist, quartzite, marble, leucocratic granite, mafic dyke and alkali granite. The Gonam complex can be divided into three units from south to north. The first is dominated by alternation of quartz schist and mica schist, which are intruded by leucocratic granites and mafic dykes. The second unit is highly sheared and folded quartzite. The last unit is composed of schists and marble intruded by acidic dykes, mafic dykes and foliated syenite. The deformation of the Gonam complex is characterized by one ductile shearing, two generations of folding, and four generations of faulting. The most prominent geological structures developed in the Gonam Complex are ductile structures, such as mylonitic foliations, mineral stretching lineations, sheath folds and oblique folds. At most outcrops the Gonam Complex was strongly sheared and intruded by amphibolitic dykes and leucocratic granites, which are also sheared. Widely developed mylonite indicates the ductile shearing occurred in high temperature metamorphic condition. SHRIMP zircon ages of detrital zircons obtained from schist and quartzite range from 3313 to 1819 Ma indicating the Gonam Complex deposited after Paleoproterozoic. Intrusion ages of foliated leucocratic granite, mafic dyke and foliated syenite are 821 Ma, 812 Ma and 751 Ma, respectively. And massive mafic dyke, syenite and two-mica granite (232~228 Ma) are interpreted as post-collisional igneous activity. These events are similar to those of Qinling-Dabie Belt and suggest that the Gyeonggi Massif is probably correlated to the Qinling-Dabie Belt.

Kihm, You Hong; Kim, Sung Won

2013-04-01

158

The formation conditions of labuntsovite-group minerals in the Kovdor massif, Kola Peninsula  

NASA Astrophysics Data System (ADS)

In the Kovdor massif, labuntsovite-group minerals occur in dolomite carbonatite veins (labuntsovite-Mg), in a natrolite-calcite vein (lemmleinite-Ba and labuntsovite-Fe), and in calcite pockets and veinlets cutting fenites (late labuntsovite-Mg). They are closely intergrown with paragenetic carbonates, and this makes it possible to estimate their crystallization temperature from the fluid inclusions entrapped in dolomite (?265°C) and calcite (175-225°C). The earlier labuntsovite-Mg was formed under relatively acidic conditions, whereas later labuntsovite-calcite mineralization was derived from alkaline solutions.

Sokolov, S. V.

2014-12-01

159

Geology, petrology and isotope geochemistry of massif-type anorthosites from southwest Madagascar  

Microsoft Academic Search

Four massif-type anorthosite bodies 25–100?km2 in area occur within high-pressure granulite facies supracrustal gneisses in southwestern Madagascar. Two of these bodies\\u000a (Ankafotia and Saririaky) appear to have been pulled apart by 40?km in a ductile shear zone, but structural features such\\u000a as sub-vertical stretching lineations indicate an origin by intense west-directed flattening and pure shear. Country rocks\\u000a (Graphite Series) include

Lewis D. Ashwal; Michael A. Hamilton; Vincent P. I. Morel; Roger A. Rambeloson

1998-01-01

160

Deglaciation and post-glacial environmental evolution in the Western Massif of Picos de Europa  

NASA Astrophysics Data System (ADS)

This study examines the process of deglaciation of the Western Massif of Picos de Europa through field work, geomorphological mapping, sedimentary records and absolute datings of 14C. This massif has several peaks over 2,400 m a.s.l. (Peña Santa de Castilla, 2,596 m; Torre Santa María, 2,486 m; Torre del Mediu, 2,467 m). It is composed mainly by Carboniferous limestones. This area has been intensively affected by karstic dissolution, Quaternary glaciers and fluvio-torrential processes (Miotke, 1968; Moreno et al, 2010; Ruiz-Fernández et al, 2009; Ruiz-Fernández, 2013). At present day, periglacial processes are active at the highest elevations (Ruiz-Fernández, 2013). We have identified four main glacial stages regarding the deglaciation of the massif: (i) maximum advance corresponding to the Last Glaciation, (ii) retreat and stabilization after the maximum advance, (iii) Late Glacial, and (iv) Little Ice Age. Sedimentological studies also contribute data to the understanding of the chronological framework of these environmental changes. The datings of the bottom sediments in two long sequences (8 and 5.4 m) provided a minimum age of 18,075 ± 425 cal BP for the maximum advance stage and 11,150 ± 900 cal BP for retreat and stabilization in the phase following the maximum advance. The ongoing analyses of these sequences at very high resolution will provide new knowledge about the environmental conditions prevailing since the deglaciation of the massif. References Miotke, F.D. (1968). Karstmorphologische studien in der glazial-überformten Höhenstufe der Picos de Europa, Nordspanien. Hannover, Selbtverlag der Geografischen Gessellschaft, 161 pp. Moreno, A., Valero, B.L., Jiménez, M., Domínguez, M.J., Mata, M.P., Navas, A., González, P., Stoll, H., Farias, P., Morellón, M., Corella, J.P. & Rico, M. (2010). The last deglaciation in the Picos de Europa National Park (Cantabrian Mountains, Northern Spain). Journal of Quaternary Science, 25 (7), 1076-1091. Ruiz-Fernández, J. (2013). Las formas de modelado glaciar, periglaciar y fluviotorrencial del Macizo Occidental de los Picos de Europa (Cordillera Cantábrica). Unpublished PhD Thesis, University of Oviedo, 314 pp. Ruiz-Fernández, J., Poblete. M.A., Serrano, P., Martí, C. & García-Ruiz, J.M. (2009). Morphometry of glacial cirques in the Cantabrian Range (Northwest Spain). Zeitschrift für Geomorphologie N. F., 53, 47-68.

Ruiz-Fernández, Jesús; Oliva, Marc; García, Cristina; López-Sáez, José Antonio; Gallinar, David; Geraldes, Miguel

2014-05-01

161

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

162

NortheasterN U.s. AquAculture  

E-print Network

NortheasterN U.s. AquAculture MAnAgeMent guide A manual for the identification and management of aquaculture production hazards First edition, 2014 tessa L. Getchis, EditorUnited states Department of agriculture National Institute of Food and Agriculture #12;#12;#12;#12;NortheasterN U.s. AquAculture MAn

Firestone, Jeremy

163

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

164

Bioenergy and land-use competition in Northeast Brazil  

E-print Network

Bioenergy and land-use competition in Northeast Brazil Christian Azar Department of Physical of Brazil on "good" versus "bad" lands is investigated. It is shown that the value of the higher yields) lands. The focus of the analysis is on the Northeast of Brazil (NE), where the prospects for dedicated

165

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

166

OBLIQUE VIEW OF NORTHWEST AND NORTHEAST SIDES. NOTE THE THREE ...  

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

OBLIQUE VIEW OF NORTHWEST AND NORTHEAST SIDES. NOTE THE THREE LEVEL EQUIPMENT AREA WITH VENTILATION LOUVERS ON THE NORTHWEST SIDE AND COVERED PROMENADE ON THE NORTHEAST SIDE. VIEW FACING SOUTH - U.S. Naval Base, Pearl Harbor, Theater, Hornet Avenue between Enterprise & Pokomoke Streets, Pearl City, Honolulu County, HI

167

Horticultural management of solar greenhouses in the Northeast  

SciTech Connect

A manual on horticultural management of solar greenhouses in the Northeast is presented. The information it contains represents a combination of a number of people's experiences who have been operating solar greenhouses in the Northeast for a year or more. The focus of this manual is on how to produce food in a solar greenhouse using biological and ecological management methods.

Klein, M.

1980-01-01

168

Understanding Philanthropic Motivations of Northeast State Community College Donors  

ERIC Educational Resources Information Center

At Northeast State Community College (NeSCC) nearly 70% of students need some form of financial aid to attend. State support is flattening or decreasing and the gap is filled by private donors' support (Northeast State Community College, 2011). Hundreds of donors have made significant contributions to aid in the education of those in the…

Cook, Heather J.

2012-01-01

169

2. SOUTHEAST SIDE AND NORTHEAST REAR. SHOP BUILDING IN DISTANCE. ...  

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

2. SOUTHEAST SIDE AND NORTHEAST REAR. SHOP BUILDING IN DISTANCE. NOTE CONCRETE PROTECTION SLAB FOR UNDERGROUND CONTROL ROOM AND ESCAPE HATCH ON GROUND AT RIGHT MIDDLE DISTANCE. - 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

170

1. VIEW NORTHWEST, NORTHEAST SIDE AND SOUTHEAST FRONT OF TOWER ...  

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

1. VIEW NORTHWEST, NORTHEAST SIDE AND SOUTHEAST FRONT OF TOWER AND ORIGINAL LIGHTHOUSE - Mispillion Lighthouse, Beacon Tower, South bank of Mispillion River at it confluence with Delaware River at northeast end of County Road 203, 7 miles east of Milford, Milford, Sussex County, DE

171

Status of the Fishery Resources of the Northeast United States  

NSDL National Science Digital Library

This scientific resource provides information on fishery resources along the Atlantic Coast of the US. Released by the Resource Evaluation and Assessment Division of the Northeast Fisheries Science Center (NEFSC), it gives a detailed overview of the status of fishery resources in the Northeast US (see Introduction section).

2001-01-01

172

Cell block three and northeast guard tower (center), looking from ...  

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

Cell block three and northeast guard tower (center), looking from the central guard tower, facing northeast (note view also includes the baseball field (left), and cell blocks fourteen and eleven (right)) - Eastern State Penitentiary, 2125 Fairmount Avenue, Philadelphia, Philadelphia County, PA

173

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

174

Destabilization of the Northeast Greenland Ice Stream  

NASA Astrophysics Data System (ADS)

The Greenland Ice Sheet (GrIS) has been one of the largest contributors to global sea level rise over the last 20 years, accounting for c. 0.5 of a total of c. 3.2 mm yr-1. A significant portion of this contribution is associated with the speed up of glaciers in southeast and northwest Greenland. Here, we reveal that the Northeast Greenland Ice Stream (NEGIS), which extends more than 600 km into the interior of the ice sheet, is now undergoing dynamic thinning after more than a quarter of a century of stability. This sector of the GrIS is of particular interest in sea level projections, because the glacier flows into a large submarine basin with a negative bed slope near the grounding line. Our findings unfold the next step in mass loss of the GrIS as we show a heightened risk of rapid sustained loss from Northeast Greenland on top of the thinning in Southeast and Northwestern Greenland.

Korsgaard, N. J.; Khan, S. A.; Kjaer, K.; Bevis, M. G.; Bamber, J. L.; Kjeldsen, K. K.; Bjork, A. A.; Wahr, J. M.; Stearns, L. A.; van den Broeke, M. R.; Muresan, I. S.; Larsen, N. K.

2013-12-01

175

Northeast Oregon Hatchery Project, Final Siting Report.  

SciTech Connect

This report presents the results of site analysis for the Bonneville Power Administration Northeast Oregon Hatchery Project. The purpose of this project is to provide engineering services for the siting and conceptual design of hatchery facilities for the Bonneville Power Administration. The hatchery project consists of artificial production facilities for salmon and steelhead to enhance production in three adjacent tributaries to the Columbia River in northeast Oregon: the Grande Ronde, Walla Walla, and Imnaha River drainage basins. Facilities identified in the master plan include adult capture and holding facilities; spawning incubation, and early rearing facilities; full-term rearing facilities; and direct release or acclimation facilities. The evaluation includes consideration of a main production facility for one or more of the basins or several smaller satellite production facilities to be located within major subbasins. The historic and current distribution of spring and fall chinook salmon and steelhead was summarized for the Columbia River tributaries. Current and future production and release objectives were reviewed. Among the three tributaries, forty seven sites were evaluated and compared to facility requirements for water and space. Site screening was conducted to identify the sites with the most potential for facility development. Alternative sites were selected for conceptual design of each facility type. A proposed program for adult holding facilities, final rearing/acclimation, and direct release facilities was developed.

Watson, Montgomery

1995-03-01

176

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

177

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

178

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

179

Stratigraphy of Upper Cretaceous-Palaeogene sequences in the southern and eastern Menderes Massif (western Turkey)  

NASA Astrophysics Data System (ADS)

The stratigraphy of the uppermost levels of the Menderes Massif is controversial and within its details lie vital constraints to the tectonic evolution of south-western Turkey. Our primary study was carried out in four reference areas along the southern and eastern Menderes Massif. These areas lie in the upper part of the Menderes metamorphic cover and have a clear stratigraphic relationship and contain datable fossils. The first one, in the Akbük-Milas area, is located south-east of Bafa Lake where the Milas, then K?z?la?aç and Kaz?kl? formations are well exposed. There, the Milas formation grades upwards into the K?z?la?aç formation. The contact between the K?z?la?aç and the overlying Kaz?kl? formation is not clearly seen but is interpreted as an unconformity. The Milas and K?z?la?aç formations are also found north of Mu?la, in the region of Yata?an and Kavakl?dere. In these areas, the Milas formation consists of schists and conformably overlying platform-type, emery and rudist-bearing marbles. Rudists form the main palaeontological data from which a Santonian-Campanian age is indicated. The K?z?la?aç formation is characterized by reddish-greyish pelagic marbles with marly-pelitic interlayers and coarsening up debris flow deposits. Pelagic marbles within the formation contain planktonic foraminifera and nanoplankton of late Campanian to late Maastrichtian age. The Kaz?kl? formation is of flysch type and includes carbonate blocks. Planktonic foraminifera of Middle Palaeocene age are present in carbonate lenses within the formation. In the Serinhisar-Tavas area, Mesozoic platform-type marbles (Y?lanl? formation) belonging to the cover series of the Menderes Massif exhibit an imbricated internal structure. Two rudist levels can be distinguished in the uppermost part of the formation: the first indicates a middle-late Cenomanian age and the upper one is Santonian to Campanian in age. These marbles are unconformably covered by the Palaeocene-Early Eocene Zeybekölentepe formation with polygenetic breccias. In the Çal-Denizli area, the Menderes massif succession consists of cherty marbles and clastic rocks with metavolcanic lenses. The Lower-Middle Eocene ?alvan formation lies unconformably on this sequence and is interpreted as equivalent to the marble horizons at Serinhisar but with pelagic facies. The ?alvan formation consists of shale, mafic volcanic rock, lenses of limestone and blocks of recrystallized limestone. The ?alvan formation is dated here for the first time by Early-Middle Eocene foraminifera and nanoplankton from the matrix of the formation. An angular unconformity exists between the Upper Cretaceous and Lower Tertiary sequences, suggesting that a phase of deformation affected the southern and eastern part of the Menderes Massif at this time. This deformation may be caused by initial obduction of the Lycian ophiolite onto the passive margin to the north of the Menderes carbonate platform during the latest Cretaceous. Drowning of the platform led to termination of carbonate deposition and deposition of deep water flysch-like clastic sediments.

Özer, Sacit; Sözbilir, Hasan; Özkar, ?zver; Toker, Vedia; Sari, Bilal

2001-03-01

180

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

NASA Astrophysics Data System (ADS)

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 ?18O for 83 enriched samples is 9.5 ‰ Depletions in 18O occur in 8% of the samples which have values ranging from 3.0 to 5.8 ‰ Only 2 of the samples fall within the normal magmatic range for anorthosites. Low ?18O values of 3.0 to 5.8 ‰ in the anorthosite occur only near contacts, and a gradient in ?18O occurs near the contact within the border zone of the massif. Low ?18O values in both the anorthosite and adjacent wollastonite skarns (with ?18O down to -1.3) were probably caused by isotopic exchange with heated meteoric water when the anorthosite intruded at shallow levels, prior to Grenvilleage (˜ 1.1 by) granulite facies metamorphism. The 18O-enrichment was ascribed to exchange between anorthosite and 18O-rich marble by means of a pervasive, H2O-CO2 fluid during the regional metamorphism by Taylor (1969). However, a number of lines of evidence argue against this hypothesis: 1) the preservation of premetamorphic low ?18O values in anorthosite from the border zone as well as preserved gradients in ?18O from a number of localities, 2) mass balance calculations of the amount of marble necessary to produce the 18O enrichment 3) metamorphic phase equilibria which buffer P_{{text{CO}}_{text{2}} } and P_{{text{H}}_{text{2}} {text{O}}} to low values, and, 4) recent oxygen isotope analyses show homogeneity which indicates that magmatic oxygen isotope compositions have been preserved. We evaluated the importance of magmatic assimilation of country rock at the present level of intrusion as an alternative cause of the 18Oenrichment. Samples from 2 distinct lobes of the massif were analyzed: the NE lobe where xenoliths of metasedimentary country rock are common, and the NW lobe, where xenoliths are scarce and the country rock is dominantly granitic. The mean values of ?18O for these two lobes are 9.6 in the NE and 9.3 in the NW. Thus, magmatic assimilation at the present level of exposure probably had only localized and relatively minor effects on the oxygen isotope composition of the massif. This conclusion is supported by Rb/Sr data: variations in Rb content and (87Sr/ 86Sr)i show that such crustal contamination is localized, generally occurring only in samples near the border zone. All of the available results suggest that the 18O-enrichment is a magmatic feature, acquired prior to intrusion at the present level of exposure.

Morrison, Jean; Valley, John W.

1988-01-01

181

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

182

Microgranular enclaves as evidence of rapid cooling in granitoid rocks: the case of the Los Pedroches granodiorite, Iberian Massif, Spain  

Microsoft Academic Search

Microgranular enclaves from the Los Pedroches granodiorite (LPG) (Los Pedroches Batholith, Iberian Massif, Spain) have Sr-Nd isotopic and mineral chemical compositions close to those of their host. This similarity is not related to restite unmixing, as indicated by the igneous textures of the enclaves. A number of other geological and geochemical lines of evidence, including the high REE and HFSE

Teodosio Donaire; Emilio Pascual; Christian Pin; Jean-Louis Duthou

2005-01-01

183

Possible petrogenetic associations among igneous components in North Massif soils: Evidence in 2-4 mm soil particles from 76503  

NASA Technical Reports Server (NTRS)

Studies of Apollo 17 highland igneous rocks and clasts in breccias from the North and South Massifs have described magnesian troctolite, norite, anorthositic gabbro, dunite, spinel cataclasites, and granulitic lithologies that may have noritic anothosite or anorthositic norite/gabbro as igneous precursors, and have speculated on possible petrogenetic relationships among these rock types. Mineral compositions and relative proportions of plagioclase and plagioclase-olivine particles in samples 76503 indicate that the precursor lithology of those particles were troctolitic anorthosite, not troctolite. Mineral and chemical compositions of more pyroxene-rich, magnesian breccias and granulites in 76503 indicate that their precursor lithology was anorthositic norite/gabbro. The combination of mineral compositions and whole-rock trace-element compositional trends supports a genetic relationship among these two groups as would result from differentiation of a single pluton. Although highland igneous lithologies in Apollo 17 materials have been described previously, the proportions of different igneous lithologies present in the massifs, their frequency of association, and how they are related are not well known. We consider the proportions of, and associations among, the igneous lithologies found in a North Massif soil, which may represent those of the North Massif or a major part of it.

Jolliff, Bradley L.; Bishop, Kaylynn M.; Haskin, Larry A.

1992-01-01

184

Geochemistry of apatite-rich layers in the Finero phlogopiteperidotite massif (Italian Western Alps) and ion microprobe dating of apatite  

E-print Network

Geochemistry of apatite-rich layers in the Finero phlogopite­peridotite massif (Italian Western form 20 February 2008 Accepted 28 February 2008 Editor: R.L. Rudnick Keywords: Finero peridotite Metasomatism Apatite Carbonate Highly metasomatized apatite-rich peridotite layers (AP-layer) occur

185

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

186

The Dilemma and Solutions for the Conflicts between Equality and Excellence in the Massification of Higher Education in Taiwan  

ERIC Educational Resources Information Center

Equality and excellence are two core values underlying many educational endeavors; however, they are often in conflict and controversy. This article intends to examine the dilemma created by such controversies in the context of massification of higher education in Taiwan and attempt to provide solutions from both the theoretical and policy…

Hsiou-Huai, Wang

2012-01-01

187

Geochemistry and petrogenesis of post-collisional ultrapotassic syenites and granites from southernmost Brazil: the Piquiri Syenite Massif.  

PubMed

The Piquiri Syenite Massif, southernmost Brazil, is part of the post-collisional magmatism related to the Neoproterozoic Brasiliano-Pan-African Orogenic Cycle. The massif is about 12 km in diameter and is composed of syenites, granites, monzonitic rocks and lamprophyres. Diopside-phlogopite, diopside-biotite-augite-calcic-amphibole, are the main ferro-magnesian paragenesis in the syenitic rocks. Syenitic and granitic rocks are co-magmatic and related to an ultrapotassic, silica-saturated magmatism. Their trace element patterns indicate a probable mantle source modified by previous, subduction-related metasomatism. The ultrapotassic granites of this massif were produced by fractional crystallization of syenitic magmas, and may be considered as a particular group of hypersolvus and subsolvus A-type granites. Based upon textural, structural and geochemical data most of the syenitic rocks, particularly the fine-grained types, are considered as crystallized liquids, in spite of the abundance of cumulatic layers, schlieren, and compositional banding. Most of the studied samples are metaluminous, with K2O/Na2O ratios higher than 2. The ultrapotassic syenitic and lamprophyric rocks in the Piquiri massif are interpreted to have been produced from enriched mantle sources, OIB-type, like most of the post-collisional shoshonitic, sodic alkaline and high-K tholeiitic magmatism in southernmost Brazil. The source of the ultrapotassic and lamprophyric magmas is probably the same veined mantle, with abundant phlogopite + apatite + amphibole that reflects a previous subduction-related metasomatism. PMID:18506262

Nardi, Lauro V S; Plá-Cid, Jorge; Bitencourt, Maria de Fátima; Stabel, Larissa Z

2008-06-01

188

AN INTEGRATED COMMUNITY-BASED HARPY EAGLE AND AVIAN CONSERVATION PROGRAM FOR THE MAYA MOUNTAINS MASSIF, BELIZE  

Microsoft Academic Search

Historically, research and monitoring of fl ora and fauna in the protected areas of the Maya Mountains Massif (MMM) of Belize have been conducted primarily by foreign scientists. This is par- ticularly true in areas such as the Bladen Nature Reserve (BNR) where its strict category of protection prevents even tourism as a means of alternative livelihoods for locals. Past

JAMES A. ROTENBERG; JACOB MARLIN; SAM MEACHAM; SHARNA TOLFREE

189

The structure of a major suture zone in the SW Iberian Massif: the Ossa-Morena\\/Central Iberian contact  

Microsoft Academic Search

We have investigated the stratigraphy, structure and metamorphism of the boundary between the Ossa Morena Zone (OMZ) and the Central Iberian Zone (CIZ), two significant continental portions of the Variscan Iberian Massif. The OMZ\\/CIZ contact is marked by a strongly deformed and metamorphosed NW–SE trending narrow band, namely, the Central Unit, in which partially retrogressed eclogites are included. During the

J. F. Simancas; D. Mart??nez Poyatos; I. Expósito; A. Azor; F. González Lodeiro

2001-01-01

190

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

191

A Paleozoic anorthosite massif related to rutile-bearing ilmenite ore deposits, south of the Polochic fault, Chiapas Massif Complex, Mexico  

NASA Astrophysics Data System (ADS)

The Chiapas Massif Complex in the southern Maya terrane is mostly composed of late Permian igneous and meta-igneous rocks. Within this complex in southern Mexico and in the adjacent San Marcos Department of Guatemala, south of the Polochic fault, several small outcrops (~10 km2) of a Phanerozoic andesine anorthosite massif were found following an E-W trend similar to the Polochic-Motagua Fault System. Such anorthosites are related to rutile-bearing ilmenite ore deposits and hornblendite-amphibolite bands (0.1-3 meters thick). The anorthosites show recrystallization and metamorphic retrogression (rutile with titanite rims), but no relicts of high-grade metamorphic minerals such as pyroxene or garnet have been found. In Acacoyagua, Chiapas, anorthosites are spatially related to oxide-apatite rich mafic rocks; in contrast, further to the west in Motozintla, they are related to monzonites. Zircons from these monzonites yield a Permian U-Pb age (271.2×1.4 Ma) by LA-MC-ICPMS. Primary mineral assemblage of the anorthosites include mostly medium to fine-grained plagioclase (>90%) with rutile and apatite as accessory minerals, occasionally with very low amounts of quartz. Massive Fe-Ti oxide lenses up to tens of meters in length and few meters thick are an ubiquitous constituent of these anorthosites and their mineralogy include ilmenite (with exsolution lamellae of Ti-magnetite), rutile, magnetite, clinochlore, ×spinel, ×apatite, ×zircon and srilankite (Ti2ZrO6, first finding of this phase in Mexico). Rutile occurs within the massive ilmenite in two morphological types: (1) fine-grained (5-40 ?m) rutile along ilmenite grain boundaries or fractures, and (2) coarse-grained rutile (<5 mm) as discrete grains, whereas magnetite and srilankite only appear as small grains along ilmenite boundaries. Zircon is present as discontinuously aligned small grains (10-40 ?m) forming rims around many rutile and ilmenite grains. Attempts to date zircon rims by U-Pb using LA-MC-ICPMS yielded unreliable results due to extremely low U concentrations (<4 ppm). Geochemical analyses revealed that the Chiapanecan anorthosites contain by average ~58% SiO2, ~25% Al2O3, ~7% CaO, ~6% Na2O, >1000 ppm Sr, and positive europium anomalies. The anorthosites probably represent the exhumed roots of a deep-seated and differentiated mafic body of late Permian age as part of the Chiapas batholith, apparently precluding major displacements across the Polochic fault.

Cisneros, A.; Ortega-Gutiérrez, F.; Weber, B.; Solari, L.; Schaaf, P. E.; Maldonado, R.

2013-12-01

192

Shear-wave anisotropy beneath Northeast China observed by the NECESSArray  

NASA Astrophysics Data System (ADS)

NNortheast China consists of the Northeast China Plain with the Songliao basin in its center, the Central Asian Fold belt, known as the Great Xing'an Range to the west, the uplifted volcanic Changbaishan region to the east and the Sino-Korean Craton to the south. It is located more than 1000 km away from the Japan Trench, where the Pacific plate starts to subduct beneath the Eurasia plate. It is widely believed that the Songliao Basin was a rifting basin and the rifting process took place in the Jurassic immediately after the closure of the Mongol-Okhotsk Ocean. The collision between the Amurian plate and Siberia blocks after the closure probably caused lithospheric thickening of the Great Xing'an Range and NE China, and the later convective removal of the thickened lithosphere could have resulted in a thinned lithosphere. Late Mesozoic volcanic rocks are widely distributed in the region, indicating that active volcanism occurred during the Mesozoic rifting. Volcanism continued in the Cenozoic time in a rather episodic and sporadic manner. Although it is generally believed that the Cenozoic volcanism in NE China is somehow related to the subduction of the Pacific plate beneath the area, one obviously cannot invoke a regular back arc volcanogenic model to explain the Cenozoic volcanism in this region. One promising model, based on tomographic imaging, is the so-called big-mantle-wedge (BMW) model, which hypothesizes a large-scale mantle upwelling in this region as the deep origin of the Cenozoic volcanism. We measured seismic anisotropy in the upper mantle using core shear phases recorded by a large-scale international deployment (the NorthEast China Extended SeiSmic Array, NECESSArray) to investigate mantle flow beneath NE China. We employed a multi-event signal-to-noise ratio (SNR) weighted method and obtained measurements of splitting parameters at 126 stations. Overall, the observed SKS splitting times are of low amplitude (~0.8 s), indicating that the underlying mantle experienced relatively weak deformation in this region. Overall the study region shows a NW-SE fast direction, which is close to the absolute plate motion (N64°W, NUVEL-1A model, Gripp and Gordon, 2002), but is difficult to conciliate with the EW flow expected by the BMW model. The observed anisotropy also varies consistently from place to place and exhibits an asymmetric pattern across the Songliao basin. At the southeast and east edge of the Songliao basin, the fast axis aligns along the NW-SE direction, whereas the axis rotates slightly to NNW toward northeast beneath the Jiamusi massif and the Sanjiang basin. At the west edge of the basin where the North South Gravity Lineament (NSGL) is located, we found significant scatter in the fast-axis direction.

Niu, F.; Zhang, X.; Grand, S.; Ni, J. F.; Chen, Y. J.; Ning, J.; Kawakatsu, H.; Tanaka, S.; Obayashi, M.

2012-12-01

193

Thematic mapping of likely target areas for the occurence of cassiterite in the Serra do Mocambo (GO) granitic massifs using LANDSAT 2 digital imaging  

NASA Technical Reports Server (NTRS)

The applicability of LANDSAT/MSS images, enhanced by computer derived techniques, as essential tools in mineral research was investigated and the Serra do Mocambo granitic massif was used as illustration. Given the peculiar factors founded in this area, orbital imagery permitted the delineation of potential target areas of mineralization occurrences, associated to albitized/greisenized types. Follow up prospection for primary tin deposits in this granitic massif should be restricted to the delineated areas which are less than 5% of the total superficial area of the massif.

Almeidofilho, R. (principal investigator)

1984-01-01

194

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

195

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

196

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

197

Mantle anisotropy of the Bohemian Massif as seen by SKS-wave splitting  

NASA Astrophysics Data System (ADS)

The Bohemian Massif (BM) assembled during the collision of Laurasia (Laurentia-Baltica) and Gondwana as a part of the Armorican Terrane Assemblage. It represents the estern-most outcrop of the European Variscan belt. The detailed tomographic and seismic anisotropy research of the deep structure of the BM has proceeded in several passive seismic experiments: BOHEMA I (2001-2003), BOHEMA II (2004-2005), BOHEMA III (2005-2006), PASSEQ (2006-2008) and Eger Rift (2007-2011). During these periods, the whole massif was stepwise covered by networks of temporal short-period and broad-band stations that recorded large amount of data from teleseismic events. The inferences from seismic anisotropy image the Bohemian Massif as a mosaic of microplates with a rigid mantle lithosphere preserving a fossil olivine fabric. The mantle domains can be associated with the tectonic units recognized by geological studies: Saxothuringian (ST), Teplá-Barrandian (TB), Moldanubian (MB) and finally Moravian (M) and Silesian (S) parts of the MS Zone, overlying the Brunovistulian mantle lithosphere. In this contribution, we concetrate on the large-scale mantle anisotropy modelled from splitting of SKS waves and their particle motion (PM). An advantage of using PM analysis is its ability to employ even events with lower signal-to-noise ratio (SNR) that are otherwise not usable for splitting analysis. To improve results of splitting analysis of signals distorted by noise, we use stacking of individual splitting measurements from waves closely propagating through the mantle. Another way of improving our analysis is a stacking of individual splittings of a single event measured at nearby stations. On average, the fast shear waves are polarized in the E-W direction in the ST, MD, TB units, but exhibit different regional variations of the splitting parameters in dependence on back-azimuths. Thus, different lithosphere mantle fabrics in the ST, MD and TB units were modelled. Moreover, the ST unit can be divided in two parts differing by about 30° in the fast S polarization directions. The boundary correlates with the geologically mapped Saxonian Lineament. To the north of the BM, the fast S polarizations significantly change. Within the BM, mean azimuths of fast S polarizations calculated for opposite back-azimuths differ. This is one of indications of the directional dependence of shear-wave splitting due to wave propagation through an anisotropic medium with a generally inclined symmetry axis. Anisotropic models with inclined symmetry axes are consistent with results derived from modelling directional variations of P-wave residuals.

Vecsey, Ludek; Plomerova, Jaroslava; Babuska, Vladislav

2014-05-01

198

Trondhjemite-granodiorite intrusive magmatism of the Losevo lithotectonic zone of the Voronezh crystalline massif  

NASA Astrophysics Data System (ADS)

The mineralogical-petrographic, petrochemical, and geochemical characteristics of the trondhjemite-granodiorite intrusions widespread among the volcanoterrigenous rocks of the eastern part of the Voronezh crystalline massif are studied. The rocks are characterized by cotectic quartz-plagioclase differentiation and differentiated (La/Yb = 31) REE pattern and are enriched in LILE with a decrease in the K/Rb and Zr/Hf ratios and an increase in the Th/U ratio by 1.5-2 times relative to subduction trondhjemites and their volcanic analogs from the modern and young island arcs. These data allow us to conclude that generation of the trondhjemite magma is a result of melting of the rocks of the continental crust during collision. The concordant (SHRIMP) age of trondhjemites is 2047 ± 11 Ma, and the age of zircon cores probably entrapped from the host rocks by the trondhjemitic melt is 2172 ± 17 Ma.

Skryabin, V. Yu.; Terentiev, R. A.

2014-10-01

199

Oxidation state of the lithospheric mantle beneath the Massif Central,France  

NASA Astrophysics Data System (ADS)

The Tertiary and Quaternary volcanism of the French Massif Central sampled the underlying subcontinental lithospheric mantle (SCLM) in the form of xenoliths over a wide geographic area of ~20.000km2. Such an extensive distribution of xenoliths provides an unique opportunity to investigate regional variations in mantle structure and composition. On the basis of textural and geochemical differences, Lenoir et al. (2000) and later Downes et al. (2003) identified two distinct domains in the SCLM lying north and south of latitude 45° 30' N, respectively. The northern domain is relatively refractory, but has experienced pervasive enrichment of LREE. The southern domain is generally more fertile, exhibiting depletion in LREE. A metasomatic overprint has developed to variable extents in many xenolith suites. The different histories of these two juxtaposed blocks of SCLM should also be reflected in their oxidation state, with local variations also to be expected due to metasomatic interactions. For example, if carbonate-melt metasomatism played a role in the LREE enrichment of the northern domain (Lenoir et al. 2000; Downes et al. 2003), then such mantle should be relatively oxidised. Since surprisingly little redox data are currently available, we are undertaking a study to determine the oxidation state of the SCLM beneath the Massif Central over the largest geographical area possible. All xenoliths investigated are spinel peridotites, mostly with protogranular textures (although some samples are porphyroclastic or equigranular). Most samples are nominally anhydrous although minor amphibole is present in some xenolith suites. Major element compositions of the individual minerals were determined by microprobe. Two-pyroxene temperatures (BKN) range from 750° to ~1200° C. Ferric iron contents of spinel were determined by Mössbauer spectroscopy and gave a range of Fe3+/ Fetot from 0.191 to 0.418, with a conservative uncertainty of ±0.02. These data were used to calculate oxygen fugacity (fO2) of the peridotites using the Nell-Wood calibration for the equilibrium between olivine, orthopyroxene and spinel (Wood et al. 1990) and are referenced to the fayalite-magnetite-quartz (FMQ) redox buffer. Preliminary results yield ?log(fO2) values between FMQ-0.17 and FMQ+1.65 log units. In this fO2 range propagated uncertainties are on the order of 0.1 log units. Although there is some overlap, localities from the northern block tend to record higher values (>FMW+0.9). In the south, fO2values from a number of localities cluster around FMQ+0.3 to FMQ+0.6, with higher values associated with the occurrence of amphibole in the xenoliths. The higher values (>FMQ+1) testify to localised metasomatic interaction in the SCLM, possibly related to melt migration during earlier phases of magmatic activity in the region. This hypothesis is also consistent with lower fO2 values observed at one locality (Fraisse) on the northern block that is significantly older and thus sampled the mantle prior to the subsequent metasomatic activity in this block of SCLM. Downes H., Reichow M.K., Mason P.R.D., Beard A.D., Thirlwall M.F. (2003) Mantle domains in the lithosphere beneath the French Massif Central: trace element and isotopic evidence from mantle clinopyroxenes. Chem. Geol., 200, 71-87. Lenoir, X., Garrido, C.J., Bodinier, J.-L., Dautria, J.-M. (2000) Contrasting lithospheric mantle domains beneath the Massif Central (France) revealed by geochemistry of peridotite xenoliths. Earth Planet. Sci. Lett. 181, 359-375. Wood B.J., Bryndzia L.T., Johnson K.E. (1990) Mantle oxidation state and its relation to tectonic environment. Science, 248, 337-345.

Uenver-Thiele, L.; Woodland, A. B.; Downes, H.; Altherr, R.

2012-04-01

200

Method of determining the vertical seismic profile of a rock massif using Rayleigh-type waves  

NASA Astrophysics Data System (ADS)

A method is substantiated for calculating the vertical seismic profile using Rayleigh polarization waves recorded on the surface, which occur during the interaction of P and SV waves localized in the heterogeneous half-space. The method makes it possible to solve the inverse problem of finding the velocities of longitudinal and transverse waves in the massif with the number of calculated points achieving 400. An algorithm of the method is presented which envisages application of multimode dispersion analysis and computation of reference points for the wave velocity in B.M. Levitan algebraic polynomials. The possibilities of the method are illustrated by examples of using it to study model objects, as well as by results of comparing microseismic exploration data.

Zagorskii, L. S.; Shkuratnik, V. L.

2013-03-01

201

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

202

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

203

Crystal structure of hydrogen-bearing vuonnemite from the Lovozero alkaline massif  

SciTech Connect

Hydrogen-bearing vuonnemite from the Shkatulka hyperagpaitic pegmatite (the Lovozero alkaline massif, Kola Peninsula) was studied by single-crystal X-ray diffraction. The triclinic unit-cell parameters are as follows: a = 5.4712(1) Angstrom-Sign , b = 7.1626(1) Angstrom-Sign , c = 14.3702(3) Angstrom-Sign , {alpha} = 92.623(2) Degree-Sign , {beta} = 95.135(1) Degree-Sign , {gamma} = 90.440(1) Degree-Sign , sp. gr. P1, R = 3.4%. The Na{sup +} cations and H{sub 2}O molecules are ordered in sites between the packets. The water molecules are hydrogen bonded to the PO{sub 4} tetrahedra.

Rastsvetaeva, R. K., E-mail: rast@ns.crys.ras.ru; Aksenov, S. M.; Verin, I. A. [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation); Lykova, I. S. [Moscow State University (Russian Federation)

2011-05-15

204

Pumpellyite from Miarolitic Pegmatites in the Strzegom-Sobótka Massif, SW Poland  

NASA Astrophysics Data System (ADS)

We describe for the first time the occurrence of pumpellyite in a miarolitic pegmatite from the monzogranite quarry in Kostrza near Strzegom (Strzegom-Sobótka massif, SW Poland). Unit cell parameters: a = 8.801(1) Å, b = 5.905(1) Å, c = 19.092(1) Å, ? = 97.388(9)°, V = 983.88(35) Å3 and the predominance of Al cations on the X structural site define the mineral as pumpellyite-(Al). Both divalent and trivalent iron is present in the structure and Fe2+/Fe3+ is 88:12. Intracrystalline partitioning of ferric and ferrous iron is discussed. The pumpellyite probably crystallized within the temperature range 200-150°C.

Szuszkiewicz, Adam; Chojcan, Jan; Kozakiewicz, Kazimierz; Sachanbi?ski, Micha?

2007-01-01

205

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

206

arising from the Nanga Parbat Continental Dynamics Project Tectonic and geochronologic observations in Central and Southern Nanga Parbat-Haramosh Massif  

E-print Network

and the overthrust Kohistan-Ladakh fossil island arc in the Pakistan Himalaya 2 . The Nanga Parbat- Haramosh massif Proterozoic, Indian plate rocks that have been exhumed from beneath Kohistan-Ladakh 3 . Early Himalayan age

Kidd, William S. F.

207

Volcanic evolution of the submarine super volcano, Tamu Massif of Shatsky Rise: New insights from Formation MicroScanner logging imagery  

NASA Astrophysics Data System (ADS)

Massif, the southernmost plateau of Shatsky Rise, is recently reported as the largest single volcano known on Earth. This work seeks to understand the type of volcanism necessary to form such an anomalously large single volcano by integrating core and high-resolution wireline logging data. In particular, resistivity imagery obtained by the Formation MicroScanner, in Integrated Ocean Drilling Program Hole U1347A, located on the eastern flank of Tamu Massif, was used to construct a logging-based volcanostratigraphy. This model revealed two different volcanic stages formed Tamu Massif: (i) the core part of the massif's basaltic basement was formed by a "construction phase" of volcanism with cyclic eruption events from a steady state magma supply and (ii) the very topmost basaltic section was formed by a "depositional phase" of volcanism during which long-traveling lava flows were deposited from a distant eruption center.

Tominaga, Masako; Iturrino, Gerardo; Evans, Helen F.

2015-01-01

208

1. EXTERIOR VIEW, LOOKING NORTH NORTHEAST ALONG EASTERN VALLEY ROAD, ...  

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

1. EXTERIOR VIEW, LOOKING NORTH NORTHEAST ALONG EASTERN VALLEY ROAD, WITH FRONT AND SIDE (WEST) ELEVATIONS AND REAR ADDITIONS - Thomas H. Owen House, Eastern Valley Road West of State Road 150, McCalla, Jefferson County, AL

209

4. View of center tower at Clover Island, facing northeast. ...  

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4. View of center tower at Clover Island, facing northeast. Pasco-Kennewick automobile bridge in background, lower right. - Pasco-Kennewick Transmission Line, Columbia River Crossing Towers, Columbia Drive & Gum Street, Kennewick, Benton County, WA

210

7. INTERIOR VIEW LOOKING NORTHEAST. SHOWING THREE STORY CONCRETE SHOP ...  

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7. INTERIOR VIEW LOOKING NORTHEAST. SHOWING THREE STORY CONCRETE SHOP STRUCTURES DIVIDING HANGAR INTO THREE WORK BAYS. - Loring Air Force Base, Double Cantilever Hangar, East of Arizona Road, west of southern portion of Taxiway J, Limestone, Aroostook County, ME

211

Interior view of northeast unit utility room addition, looking into ...  

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Interior view of northeast unit utility room addition, looking into kitchen and converted exterior window, facing north - MacDill Air Force Base, Double Non-Commissioned Officers' Quarters, 7418 Hanger Loop Drive, Tampa, Hillsborough County, FL

212

Interior view of northeast unit bedroom, looking into hall, facing ...  

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Interior view of northeast unit bedroom, looking into hall, facing southeast - MacDill Air Force Base, Double Non-Commissioned Officers' Quarters, 7418 Hanger Loop Drive, Tampa, Hillsborough County, FL

213

Interior view of northeast unit living room, looking into dining ...  

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Interior view of northeast unit living room, looking into dining room past stair, facing south - MacDill Air Force Base, Double Non-Commissioned Officers' Quarters, 7418 Hanger Loop Drive, Tampa, Hillsborough County, FL

214

Interior view of northeast unit living room, looking into porch, ...  

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Interior view of northeast unit living room, looking into porch, facing north - MacDill Air Force Base, Double Non-Commissioned Officers' Quarters, 7418 Hanger Loop Drive, Tampa, Hillsborough County, FL

215

Window detail, showing doublehung and hopper windows, view facing northeast ...  

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Window detail, showing double-hung and hopper windows, view facing northeast - U.S. Naval Base, Pearl Harbor, Dry Dock No. 4, Galley, Third Street at intersection of Avenue I, Pearl City, Honolulu County, HI

216

OVERHEAD VIEW OF VIVIANNA WORKS ORE BIN LOOKING NORTHEAST. GENERATOR ...  

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OVERHEAD VIEW OF VIVIANNA WORKS ORE BIN LOOKING NORTHEAST. GENERATOR BUILDING TOP LEFT, OFFICE AND STOREROOM TOP CENTER, ROTARY KILN AND CONDENSER PLATFORM RIGHT. - Mariscal Quicksilver Mine & Reduction Works, Terlingua, Brewster County, TX

217

GENERAL VIEW OF VIVIANNA ERA WORKS LOOKING NORTH, NORTHEAST. NOTICE ...  

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GENERAL VIEW OF VIVIANNA ERA WORKS LOOKING NORTH, NORTHEAST. NOTICE LONG CONDENSER CHANNEL CONNECTING TO MARISCAL ERA CONDENSER STACK FAR RIGHT. - Mariscal Quicksilver Mine & Reduction Works, Terlingua, Brewster County, TX

218

112. REFRIGERANT CONDENSER TANKS AND PRESSURE CONTROLS IN NORTHEAST CORNER ...  

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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

219

30. GENERAL VIEW OF VIVIANNA ERA WORKS LOOKING NORTH, NORTHEAST. ...  

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30. GENERAL VIEW OF VIVIANNA ERA WORKS LOOKING NORTH, NORTHEAST. NOTICE LONG CONDENSER CHANNEL CONNECTING TO MARISCAL ERA CONDENSER STACK FAR RIGHT. - Mariscal Quicksilver Mine & Reduction Works, Terlingua, Brewster County, TX

220

2. VIEW NORTHEAST OF CONDENSER WATER INTAKE (LEFT), GENERATING PLANT ...  

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

2. VIEW NORTHEAST OF CONDENSER WATER INTAKE (LEFT), GENERATING PLANT AND STACK (CENTER), AND VIADUCT (EXTREME RIGHT) - Turners Falls Power & Electric Company, Hampden Station, East bank of Connecticut River, Chicopee, Hampden County, MA

221

1. VIEW, LOOKING NORTHEAST, SHOWING SOUTHWEST PORTION AND WING WALL ...  

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

1. VIEW, LOOKING NORTHEAST, SHOWING SOUTHWEST PORTION AND WING WALL OF WASTE WEIR #3 ON THE CANAL SIDE - Erie Canal (Enlarged), Oothout Culvert & Waste Weir, Lock No. 4 vicinity, near Maplewood village, Colonie, Albany County, NY

222

3. VIEW, LOOKING SOUTHWEST, SHOWING NORTHEAST PORTION OF WASTE WEIR ...  

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

3. VIEW, LOOKING SOUTHWEST, SHOWING NORTHEAST PORTION OF WASTE WEIR #3 ON THE SPILLWAY SIDE - Erie Canal (Enlarged), Oothout Culvert & Waste Weir, Lock No. 4 vicinity, near Maplewood village, Colonie, Albany County, NY

223

General view of Antenna Array and building complex, looking northeast ...  

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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

224

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

225

View from northeast to southwest of PAR site sentry station; ...  

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View from northeast to southwest of PAR site sentry station; formerly the bachelor's enlisted men's quarter (BEQ) - Stanley R. Mickelsen Safeguard Complex, Sentry Station, North of Second Avenue & West of Electrical Switch Station No. 2, Nekoma, Cavalier County, ND

226

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

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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

227

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

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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

228

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

229

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

230

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

231

View northeast; structural detail at northerly canopy New Canaan ...  

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View northeast; structural detail at northerly canopy - New Canaan Railroad Station, Approximately 200 feet southwest of intersection of Park & Elm Streets & approximately 150 feet north of Pine Street, New Canaan, Fairfield County, CT

232

View northeast; southerly elevation of station building and southerly canopy ...  

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

View northeast; southerly elevation of station building and southerly canopy - New Canaan Railroad Station, Approximately 200 feet southwest of intersection of Park & Elm Streets & approximately 150 feet north of Pine Street, New Canaan, Fairfield County, CT

233

View northeast; structural detail of southern canopy New Canaan ...  

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

View northeast; structural detail of southern canopy - New Canaan Railroad Station, Approximately 200 feet southwest of intersection of Park & Elm Streets & approximately 150 feet north of Pine Street, New Canaan, Fairfield County, CT

234

View northeast; southerly elevation of northern canopy New Canaan ...  

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

View northeast; southerly elevation of northern canopy - New Canaan Railroad Station, Approximately 200 feet southwest of intersection of Park & Elm Streets & approximately 150 feet north of Pine Street, New Canaan, Fairfield County, CT

235

View northeast; south elevation of southerly canopy New Canaan ...  

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

View northeast; south elevation of southerly canopy - New Canaan Railroad Station, Approximately 200 feet southwest of intersection of Park & Elm Streets & approximately 150 feet north of Pine Street, New Canaan, Fairfield County, CT

236

6. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. CLEAR SHOP OF ...  

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

6. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. CLEAR SHOP OF CANOPY 723 AS WELL NORTH FACADES OF ADDITIONS TO BUILDING 10. - NASA Industrial Plant, Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

237

3. EXTERIOR VIEW TO THE NORTHEAST OF A RAILROAD CAR ...  

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

3. EXTERIOR VIEW TO THE NORTHEAST OF A RAILROAD CAR ON THE TRACKS AND THE PARTS OF AN ENGINE STAND. - Nevada Test Site, Pluto Facility, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

238

29. INTERIOR VIEW TO THE NORTHEAST OF CONTROL PANEL AND ...  

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

29. INTERIOR VIEW TO THE NORTHEAST OF CONTROL PANEL AND VIEWING WINDOW IN ROOM 105, THE CONTROL ROOM. - Nevada Test Site, Pluto Facility, Disassembly Building, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

239

1. EXTERIOR VIEW TO THE NORTHEAST OF A BROCK HOUSE ...  

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

1. EXTERIOR VIEW TO THE NORTHEAST OF A BROCK HOUSE USED FOR THE WATER FILTERING SYSTEM. - Nevada Test Site, Pluto Facility, Water Filtering System Brock House, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

240

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

241

15. Detail, cracks evidencing structural failure, northeast rear, view to ...  

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

15. Detail, cracks evidencing structural failure, northeast rear, view to southwest, 90mm lens. - Benicia Arsenal, Powder Magazine No. 5, Junction of Interstate Highways 680 & 780, Benicia, Solano County, CA

242

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

243

6. View northeast, junction of SR 141 and Rockland Road, ...  

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

6. View northeast, junction of SR 141 and Rockland Road, western estate wall and tree lines to right - A. I. Du Pont Estate, Junction of State Route 141 & Rockland Road, Wilmington, New Castle County, DE

244

2. VIEW OF RESIDENCE (FEATURE 12), FACING NORTHEAST. HEADFRAME AND ...  

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

2. VIEW OF RESIDENCE (FEATURE 12), FACING NORTHEAST. HEADFRAME AND STORAGE TANKS (FEATURE 18) ARE VISIBLE IN BACKGROUND. - Copper Canyon Camp of the International Smelting & Refining Company, Residence, Copper Canyon, Battle Mountain, Lander County, NV

245

1. VIEW OF LARGE GARAGE (FEATURE 13), FACING NORTHEAST. STORAGE ...  

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

1. VIEW OF LARGE GARAGE (FEATURE 13), FACING NORTHEAST. STORAGE BUILDING (FEATURE 24) IS VISIBLE ON THE HILL IN THE BACKGROUND. - Copper Canyon Camp of the International Smelting & Refining Company, Large Garage, Copper Canyon, Battle Mountain, Lander County, NV

246

1. VIEW OF DUPLEX (FEATURE 9), FACING NORTHEAST. MILL SITE ...  

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

1. VIEW OF DUPLEX (FEATURE 9), FACING NORTHEAST. MILL SITE IS SHOWN IN UPPER RIGHT CORNER OF PHOTOGRAPH. - Copper Canyon Camp of the International Smelting & Refining Company, Duplex, Copper Canyon, Battle Mountain, Lander County, NV

247

1. VIEW OF THREE ROOM RESIDENCE (FEATURE 5), FACING NORTHEAST. ...  

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

1. VIEW OF THREE ROOM RESIDENCE (FEATURE 5), FACING NORTHEAST. - Copper Canyon Camp of the International Smelting & Refining Company, Three Room Residence, Copper Canyon, Battle Mountain, Lander County, NV

248

2. VIEW OF FOUR ROOM RESIDENCE (FEATURE 1), FACING NORTHEAST. ...  

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

2. VIEW OF FOUR ROOM RESIDENCE (FEATURE 1), FACING NORTHEAST. - Copper Canyon Camp of the International Smelting & Refining Company, Four Room Residence, Copper Canyon, Battle Mountain, Lander County, NV

249

CAR INTERIOR, VIEW TOWARD THE NORTHEAST, FIREFINDER TABLE (WITH BARS) ...  

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

CAR INTERIOR, VIEW TOWARD THE NORTHEAST, FIREFINDER TABLE (WITH BARS) IN CENTER OF ROOM; VIEW OUT THE DOOR IS HETCH HETCHY VALLEY - North Mountain Lookout, Stanislaus National Forest, Groveland, Tuolumne County, CA

250

71. INTERIOR, BUILDING 272 (PLUTONIUM STORAGE BUILDING) LOOKING NORTHEAST INTO ...  

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

71. INTERIOR, BUILDING 272 (PLUTONIUM STORAGE BUILDING) LOOKING NORTHEAST INTO PLUTONIUM STORAGE ROOM SHOWING CUBICLES FOR STORAGE. - Loring Air Force Base, Weapons Storage Area, Northeastern corner of base at northern end of Maine Road, Limestone, Aroostook County, ME

251

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

252

View northeast; detail of southwest corner showing damage to façade ...  

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

View northeast; detail of southwest corner showing damage to façade - Naval Base Philadelphia-Philadelphia Naval Shipyard, Foundry-Propeller Shop, North of Porter Avenue, west of Third Street West, Philadelphia, Philadelphia County, PA

253

5. Light tower and corner of keeper's house, view northeast, ...  

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

5. Light tower and corner of keeper's house, view northeast, northwest and southwest sides - Baker Island Light, Lightkeeper's House, Just east of Cranberry Isles, at entrance to Frenchman Bay, Bar Harbor, Hancock County, ME

254

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

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

1. Keeper's house and light tower, view northeast, northwest and southwest sides - Baker Island Light, Lightkeeper's House, Just east of Cranberry Isles, at entrance to Frenchman Bay, Bar Harbor, Hancock County, ME

255

8. VIEW OF ROOM 101 (ASSEMBLY ROOM) FROM NORTHEAST CORNER ...  

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

8. VIEW OF ROOM 101 (ASSEMBLY ROOM) FROM NORTHEAST CORNER SHOWING FLEXIBLE AIR-CONDITIONING DUCT - Vandenberg Air Force Base, Space Launch Complex 3, Vehicle Support Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

256

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

257

9. REINFORCED CONCRETE SLAB ROOF FROM NORTHEAST EDGE, VIEW TOWARDS ...  

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

9. REINFORCED CONCRETE SLAB ROOF FROM NORTHEAST EDGE, VIEW TOWARDS SOUTHWEST. - Glenn L. Martin Company, Titan Missile Test Facilities, Captive Test Stand D-4, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

258

1. EXTERIOR SOUTHWEST CORNER VIEW, FACING NORTHEAST. BUILDING NO. 42 ...  

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

1. EXTERIOR SOUTHWEST CORNER VIEW, FACING NORTHEAST. BUILDING NO. 42 GARAGE & TRANSPORTATION MAINTENANCE FACILITY - NASA Industrial Plant, Garage & Transportation Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

259

3. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. BUILDING NO 42 ...  

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

3. EXTERIOR NORTHEAST CORNER VIEW, FACING SOUTHWEST. BUILDING NO 42 GARAGE & TRANSPORTATION MAINTENANCE FACILITY - NASA Industrial Plant, Garage & Transportation Maintenance Facility, 12214 Lakewood Boulevard, Downey, Los Angeles County, CA

260

3. View northeast, west facade of Lake Forest (original Forest ...  

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

3. View northeast, west facade of Lake Forest (original Forest Cottage structure incorporated into renamed structure) - Lake Placid Club, Forest Wing, East side of Mirror Lake Drive, North of State Route 86 & Main, North Elba, Essex County, NY

261

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

262

61. VIEW OF NEPTUNE'S LOCKER, SOUTHEAST SIDE AND NORTHEAST FRONT, ...  

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

61. VIEW OF NEPTUNE'S LOCKER, SOUTHEAST SIDE AND NORTHEAST FRONT, LOOKING WEST (TIGHTER VIEW THAN CA-80-60) - Huntington Beach Municipal Pier, Pacific Coast Highway at Main Street, Huntington Beach, Orange County, CA

263

49. VIEW OF NORTHEAST FRONT AND SOUTHEAST SIDE OF CAPTAIN'S ...  

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

49. VIEW OF NORTHEAST FRONT AND SOUTHEAST SIDE OF CAPTAIN'S GALLEY, LOOKING WEST FROM BEACH, SHOWING NEPTUNE'S LOCKER IN BACKGROUND - Huntington Beach Municipal Pier, Pacific Coast Highway at Main Street, Huntington Beach, Orange County, CA

264

36. VIEW LOOKING NORTHEAST, SHOWING HYPHEN CONNECTOR BETWEEN ENGINE HOUSE ...  

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

36. VIEW LOOKING NORTHEAST, SHOWING HYPHEN CONNECTOR BETWEEN ENGINE HOUSE AND CARETAKER'S COTTAGE (4' x 5' negative) - Fairmount Waterworks, East bank of Schuylkill River, Aquarium Drive, Philadelphia, Philadelphia County, PA

265

Facility No. 175, exterior oblique view of northeast and northwest ...  

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

Facility No. 175, exterior oblique view of northeast and northwest sides, corner of Facility No. 176 is in background - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

266

1. OVERALL VIEW OF MILK LAKE, LOOKING NORTHEAST High ...  

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

1. OVERALL VIEW OF MILK LAKE, LOOKING NORTHEAST - High Mountain Dams in Upalco Unit, Milk Lake Dam, Ashley National Forest, 9.4 miles Northwest of Swift Creek Campground, Mountain Home, Duchesne County, UT

267

2. View of Clark Fork Vehicle Bridge facing northeast. Bridge ...  

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

2. View of Clark Fork Vehicle Bridge facing northeast. Bridge from south shore of Clark Fork River showing 4 1/2 spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

268

4. View of Clark Fork Vehicle Bridge facing northeast. Bridge ...  

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

4. View of Clark Fork Vehicle Bridge facing northeast. Bridge from south shoreof Clark Fork River showing 4 spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

269

1. West portal of Tunnel 17, contextual view to northeast, ...  

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

1. West portal of Tunnel 17, contextual view to northeast, 135mm lens. The tunnel penetrates the toe of Dorris Hill, which rises to the left. - Southern Pacific Railroad Natron Cutoff, Tunnel No. 17, Milepost 408, Dorris, Siskiyou County, CA

270

17. GENERAL EXTERIOR VIEW LOOKING NORTHEAST, SHOWING FISH LADDER ON ...  

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

17. GENERAL EXTERIOR VIEW LOOKING NORTHEAST, SHOWING FISH LADDER ON BRADFORD ISLAND; VIEW IS TAKEN FROM ROOF OF POWERHOUSE #1; THE DAM/SPILLWAY IS IN RIGHT BACKGROUND. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

271

15. Basement level of Saw Mill looking northeast into the ...  

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

15. Basement level of Saw Mill looking northeast into the turbine pit. Headrace for the Grist Mill is beyond the wall to the right. - Sugar River Grist Mill & Saw Mill, 159 Main Street, Claremont, Sullivan County, NH

272

7. VIEW OF APPROACH TO BRIDGE #2, LOOKING NORTHEAST, WITH ...  

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

7. VIEW OF APPROACH TO BRIDGE #2, LOOKING NORTHEAST, WITH WEST END OF BRIDGE #3 IN BACKGROUND. ROCK OVERHANG IS VISIBLE - Goat Trail Mining Road, Highway 20, 1.5 miles North of Newhalem, Newhalem, Whatcom County, WA

273

8. Keeper's house, view west, southeast and northeast sides ...  

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

8. Keeper's house, view west, southeast and northeast sides - Goat Island Light Station, Goat Island, next to entrance to Cape Porpoise Harbor, just south of Trott Island, Cape Porpoise, York County, ME

274

Perspective view of east facade from northeast National Home ...  

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

Perspective view of east facade from northeast - National Home for Disabled Volunteer Soldiers, Pacific Branch, Main Mental Health Building, 11301 Wilshire Boulevard, West Los Angeles, Los Angeles County, CA

275

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

276

VIEW, LOOKING NORTHEAST, OF CHEMISTRY LAB, LOCATED ON MEZZANINE ABOVE ...  

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

VIEW, LOOKING NORTHEAST, OF CHEMISTRY LAB, LOCATED ON MEZZANINE ABOVE AND EAST OF FLOTATION CELLS. MAIN USE WAS SAMPLE ANALYSIS TO DETERMINE OPTIMUM REAGENT MIXES AND QUANTITIES. - Shenandoah-Dives Mill, 135 County Road 2, Silverton, San Juan County, CO

277

11. General interior elevation viewed from midspan toward the northeast, ...  

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

11. General interior elevation viewed from midspan toward the northeast, showing the corrugated metal barriers on both sides and the asphalt deck. - Post Road Bridge, State Route 7-A, Havre de Grace, Harford County, MD

278

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

279

4. VIEW SHOWING UPSTREAM FACE OF DAM, LOOKING NORTHEAST ...  

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

4. VIEW SHOWING UPSTREAM FACE OF DAM, LOOKING NORTHEAST - High Mountain Dams in Upalco Unit, Kidney Lake Dam, Ashley National Forest, 4.7 miles North of Miners Gulch Campground, Mountain Home, Duchesne County, UT

280

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

281

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

282

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

283

7. Northeast view interior, air traffic control and landing system ...  

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

7. Northeast view interior, air traffic control and landing system room 25 - Selfridge Field, Building No. 1050, Northwest corner of Doolittle Avenue & D Street; Harrison Township, Mount Clemens, Macomb County, MI

284

22. In context, from southwest facing northeast, typical courtyard formed ...  

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

22. In context, from southwest facing northeast, typical courtyard formed by "U" building configuration, south side of Building E-3, left. - Clark Howell Homes (Public Housing), Bounded by North Avenue, Lovejoy Street, Mills Street & Luckie Street, Atlanta, Fulton County, GA

285

36. In context, from northeast facing southwest, east side of ...  

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

36. In context, from northeast facing southwest, east side of Building E-8 across park/ballfield, right. - Clark Howell Homes (Public Housing), Bounded by North Avenue, Lovejoy Street, Mills Street & Luckie Street, Atlanta, Fulton County, GA

286

34. In context, from southwest facing northeast across Clark Howell ...  

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

34. In context, from southwest facing northeast across Clark Howell Place, west side of Building F-3, far left. - Clark Howell Homes (Public Housing), Bounded by North Avenue, Lovejoy Street, Mills Street & Luckie Street, Atlanta, Fulton County, GA

287

24. In context, from southwest facing northeast on Hunnicutt Street, ...  

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

24. In context, from southwest facing northeast on Hunnicutt Street, west side of Building D-4, far left. - Clark Howell Homes (Public Housing), Bounded by North Avenue, Lovejoy Street, Mills Street & Luckie Street, Atlanta, Fulton County, GA

288

3. EXTERIOR VIEW OF THE NORTHEAST RADAR DOME COMPLEX, STRUCTURE ...  

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

3. EXTERIOR VIEW OF THE NORTHEAST RADAR DOME COMPLEX, STRUCTURE 411, LOOKING NORTH. - Mill Valley Air Force Station, Radar Domes, East Ridgecrest Boulevard, Mount Tamalpais, Mill Valley, Marin County, CA

289

VIEW NORTHEAST, LEFT BUILDING 40 WIRE WAREHOUSE (1915) RIGHT BUILDING ...  

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

VIEW NORTHEAST, LEFT BUILDING 40 WIRE WAREHOUSE (1915) RIGHT BUILDING 42 ROPE SHOP (1910) - John A. Roebling's Sons Company & American Steel & Wire Company, South Broad, Clark, Elmer, Mott & Hudson Streets, Trenton, Mercer County, NJ

290

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

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

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

291

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

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

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

292

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

293

Straight on view of northeast side of Olive Switching Station ...  

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

Straight on view of northeast side of Olive Switching Station from north side of San Fernando Road facing southwest - Olive Switching Station, 13355 San Fernando Road, Los Angeles, Los Angeles County, CA

294

2. BUILDING 321. VIEW TO NORTHEAST. Rocky Mountain Arsenal, ...  

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

2. BUILDING 321. VIEW TO NORTHEAST. - Rocky Mountain Arsenal, Boiler Plant-Central Gas Heat Plant, 1022 feet South of December Seventh Avenue; 525 feet West of D Street, Commerce City, Adams County, CO

295

View northeast toward west side of building 68. View partially ...  

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

View northeast toward west side of building 68. View partially obscured by automobiles and storage structures. - Naval Air Station North Island, Seaplane Hangars, Roe Street, North Island, San Diego, San Diego County, CA

296

14. Detail, crack evidencing structural failure, northeast rear, view to ...  

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

14. Detail, crack evidencing structural failure, northeast rear, view to southwest, 90mm lens. Note failure of sandstone lintel above window. - Benicia Arsenal, Powder Magazine No. 5, Junction of Interstate Highways 680 & 780, Benicia, Solano County, CA

297

2. BUILDING NO. 403, WOODWORKING AND PACKAGING LABORATORY, LOOKING NORTHEAST ...  

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

2. BUILDING NO. 403, WOODWORKING AND PACKAGING LABORATORY, LOOKING NORTHEAST AT EAST AND WEST SIDES OF BUILDING. - Picatinny Arsenal, 400 Area, Gun Bag Loading District, State Route 15 near I-80, Dover, Morris County, NJ

298

18. GENERAL EXTERIOR VIEW LOOKING NORTHEAST, SHOWING FISH LADDER ON ...  

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

18. GENERAL EXTERIOR VIEW LOOKING NORTHEAST, SHOWING FISH LADDER ON BRADFORD ISLAND; DAM/SPILLWAY IS VISIBLE IN CENTER BACKGROUND. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

299

3. Credit BG. Interior view looks northeast (46°) at fire ...  

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

3. Credit BG. Interior view looks northeast (46°) at fire pumps, valves, and emergency generator (powered by an internal combustion engine). - Edwards Air Force Base, North Base, Deluge Water Pumping Station, Near Second & D Streets, Boron, Kern County, CA

300

15. Detail, view northeast across second floor deck. Scale visible ...  

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

15. Detail, view northeast across second floor deck. Scale visible at right of door opening into 'Fireplace' room. 'Van Gogh' room at left. - Deetjen's Big Sur Inn, Hayloft Building, East Side of State Highway 1, Big Sur, Monterey County, CA

301

EXTERIOR, A view looking northeast toward the south elevation and ...  

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

EXTERIOR, A view looking northeast toward the south elevation and stacks of HH Building - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

302

EXTERIOR, A view looking northeast at the south and west ...  

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

EXTERIOR, A view looking northeast at the south and west facades of the building and staircase - Department of Energy, Mound Facility, Hydrolysis House Building (HH Building), One Mound Road, Miamisburg, Montgomery County, OH

303

2. GENERAL VIEW LOOKING NORTHEAST, SHOWING COKE MACHINE (CENTER), INTERMEDIATE ...  

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

2. GENERAL VIEW LOOKING NORTHEAST, SHOWING COKE MACHINE (CENTER), INTERMEDIATE TIPPLE (RIGHT), AND OVENS - Shoaf Mine & Coke Works, East side of Shoaf, off Township Route 472, Shoaf, Fayette County, PA

304

2. PERSPECTIVE VIEW OF SOUTH AND WEST SIDES, LOOKING NORTHEAST, ...  

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

2. PERSPECTIVE VIEW OF SOUTH AND WEST SIDES, LOOKING NORTHEAST, NOTE THE OPEN PANEL IN THE SIDING THAT ALLOW FOR VENTILATION OF THE DRYING TOBACCO - The Cottage, Tobacco Barn, Upper Marlboro, Prince George's County, MD

305

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

306

8. View of Sterling Creek Marsh looking northeast across the ...  

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

8. View of Sterling Creek Marsh looking northeast across the berm with the marsh to the left - Richmond Hill Plantation, Sterling Creek Marsh, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

307

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

308

Interior, looking northeast Beale Air Force Base, Perimeter Acquisition ...  

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

Interior, looking northeast - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Clean Lubrication Oil Storage Tank & Enclosure, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

309

Interior, looking northeast Beale Air Force Base, Perimeter Acquisition ...  

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

Interior, looking northeast - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Emergency Generator Enclosure, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba 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

EXTERIOR OBLIQUE VIEW FACING FRONT AND SIDE. VIEW FACING NORTHEAST. ...  

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

EXTERIOR OBLIQUE VIEW FACING FRONT AND SIDE. VIEW FACING NORTHEAST. - U.S. Naval Base, Pearl Harbor, Naval Housing Area Hospital Point, Quarters for Officer in Charge of Radio Station, 1 Ford Island Way, Pearl City, Honolulu County, HI

312

LIVING ROOM INTERIOR TAKEN FROM FRONT ENTRY. VIEW FACING NORTHEAST. ...  

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

LIVING ROOM INTERIOR TAKEN FROM FRONT ENTRY. VIEW FACING NORTHEAST. - U.S. Naval Base, Pearl Harbor, Naval Housing Area Hospital Point, Quarters for Officer in Charge of Radio Station, 1 Ford Island Way, Pearl City, Honolulu County, HI

313

Credit BG. View looks northeast (48°) over concrete foundation for ...  

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

Credit BG. View looks northeast (48°) over concrete foundation for Utility and Paint Shop (Building 4315). Four North Base hangars appear in background - Edwards Air Force Base, North Base, Utility & Paint Shop, Second & E Streets, Boron, Kern County, CA

314

PAINT SHOP, FIRST FLOOR, NORTHEAST CORNER OFFICE INTERIOR, LOOKING WEST. ...  

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

PAINT SHOP, FIRST FLOOR, NORTHEAST CORNER OFFICE INTERIOR, LOOKING WEST. PROJECTING WALLS WITH INFILLED ARCHES WERE PART OF ONE PAINTING BOOTH IN ORIGINAL STRUCTURE. - Southern Pacific, Sacramento Shops, Paint Shop, 111 I Street, Sacramento, Sacramento County, CA

315

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

316

2. VIEW SOUTH SHOWING NORTHEAST ELEVATION; BRICK CORBELLING, BUTTRESSES AND ...  

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

2. VIEW SOUTH SHOWING NORTHEAST ELEVATION; BRICK CORBELLING, BUTTRESSES AND ART DECO STAINED GLASS - Poletown Historic District, St. Michael's Greek Catholic Church, 2390 East Grand Boulevard, Detroit, Wayne County, MI

317

FEATURE 2, OPEN SIDE OF SHELTER, VIEW FACING NORTHEAST. ...  

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

FEATURE 2, OPEN SIDE OF SHELTER, VIEW FACING NORTHEAST. - Naval Air Station Barbers Point, Anti-Aircraft Battery Complex-Shelter, East of Coral Sea Road, northwest of Hamilton Road, Ewa, Honolulu County, HI

318

VIEW LOOKING NORTHEAST WITH OPEN HEARTH TO THE LEFT, PITTSBURGH ...  

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

VIEW LOOKING NORTHEAST WITH OPEN HEARTH TO THE LEFT, PITTSBURGH & LAKE ERIE RAILROAD TRACKS CENTER. - Pittsburgh Steel Company, Monessen Works, Open Hearth Plant, Donner Avenue, Monessen, Westmoreland County, PA

319

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

320

44. NORTHEAST VIEW OF IRON DESULPHERIZATION BUILDING, WITH CALCIUM CARBIDE ...  

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

44. NORTHEAST VIEW OF IRON DESULPHERIZATION BUILDING, WITH CALCIUM CARBIDE SILO ADJACENT TO BUILDING ON RIGHT. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA

321

10. LIGHT TOWER, VIEW NORTHEAST FROM LIGHT PLATFORM, SOUTHWEST SIDE ...  

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

10. LIGHT TOWER, VIEW NORTHEAST FROM LIGHT PLATFORM, SOUTHWEST SIDE OF BOAT HOUSE AND KEEPER'S HOUSE, WITH DETAIL OF RAILING IN FOREGROUND - Grindle Point Light Station, Western end of Ferry Road on Grindle Point, Islesboro, Waldo County, ME

322

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

323

4. CONTEXTUAL VIEW TO NORTHEAST: UNIT 4, WITH BELTDRIVEN BACKUP ...  

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

4. CONTEXTUAL VIEW TO NORTHEAST: UNIT 4, WITH BELT-DRIVEN BACKUP SYSTEM ADJACENT TO GENERATOR - Washington Water Power Company Monroe Street Plant, Units 4 & 5, South Bank Spokane River, below Monroe Street Bridge, Spokane, Spokane County, WA

324

6. VIEW NORTHEAST, SOUTH FRONT OF BARN (BUILDING 44); WEST ...  

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

6. VIEW NORTHEAST, SOUTH FRONT OF BARN (BUILDING 44); WEST FRONT OF SHED (BUILDING 43) - U.S. Plant Introduction Station, Barn & Shed Buildings, 11601 Old Pond Road, Glenn Dale, Prince George's County, MD

325

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

326

4. GENERAL VIEW LOOKING NORTHEAST. SOUTH STATION VISIBLE IN BACKGROUND. ...  

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

4. GENERAL VIEW LOOKING NORTHEAST. SOUTH STATION VISIBLE IN BACKGROUND. - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

327

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

328

1. INTAKE CHANNEL LOOKING NORTHEAST; WATER FROM BEAVER BROOK ENTERS ...  

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

1. INTAKE CHANNEL LOOKING NORTHEAST; WATER FROM BEAVER BROOK ENTERS THE INTAKE CHANNEL HERE. - Hondius Water Line, 1.6 miles Northwest of Park headquarters building & 1 mile Northwest of Beaver Meadows entrance station, Estes Park, Larimer County, CO

329

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

330

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

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

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

331

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

332

5. REMAINING OPEN PORTION OF NORTHEAST SIDE OF BRIDGE, LOOKING ...  

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

5. REMAINING OPEN PORTION OF NORTHEAST SIDE OF BRIDGE, LOOKING SOUTHWEST - Escalante River Bridge, Spanning Escalante River at State Route 12, 9.5 miles East of Escalante, Escalante, Garfield County, UT

333

12. INTERIOR VIEW LOOOKING NORTHEAST FROM WITHIN SOUTH TRANSVERSE WING ...  

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

12. INTERIOR VIEW LOOOKING NORTHEAST FROM WITHIN SOUTH TRANSVERSE WING SHOWING WINDOW ARRANGEMENT AND LOG LINTELS. - Camp Cleawox Organizational Tract, Lodge Building, Oregon Dunes National Recreation Area, Siuslaw National Forest, Florence, Lane County, OR

334

22. INTERIOR VIEW OF BUILDING 2, FACING NORTHEAST. New ...  

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

22. INTERIOR VIEW OF BUILDING 2, FACING NORTHEAST. - New Orleans City Railroad Company, Canal Station, Square 365, bounded by Canal, North Dupre, Iberville, & North White Streets, New Orleans, Orleans Parish, LA

335

13. INTERIOR VIEW OF BUILDING 1, FACING NORTHEAST. New ...  

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

13. INTERIOR VIEW OF BUILDING 1, FACING NORTHEAST. - New Orleans City Railroad Company, Canal Station, Square 365, bounded by Canal, North Dupre, Iberville, & North White Streets, New Orleans, Orleans Parish, LA

336

6. VIEW OF FRONT ELEVATION, BUILDING 1, FACING NORTHEAST. ...  

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

6. VIEW OF FRONT ELEVATION, BUILDING 1, FACING NORTHEAST. - New Orleans City Railroad Company, Canal Station, Square 365, bounded by Canal, North Dupre, Iberville, & North White Streets, New Orleans, Orleans Parish, LA

337

2. VIEW OF FRONT ELEVATION, CANAL STATION COMPLEX, FACING NORTHEAST ...  

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

2. VIEW OF FRONT ELEVATION, CANAL STATION COMPLEX, FACING NORTHEAST - New Orleans City Railroad Company, Canal Station, Square 365, bounded by Canal, North Dupre, Iberville, & North White Streets, New Orleans, Orleans Parish, LA

338

8. VIEW OF FRONT ELEVATION, BUILDING 2, FACING NORTHEAST. ...  

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

8. VIEW OF FRONT ELEVATION, BUILDING 2, FACING NORTHEAST. - New Orleans City Railroad Company, Canal Station, Square 365, bounded by Canal, North Dupre, Iberville, & North White Streets, New Orleans, Orleans Parish, LA

339

7. VIEW OF FRONT ELEVATION CONCRETE BLOCK SCREEN, FACING NORTHEAST. ...  

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

7. VIEW OF FRONT ELEVATION CONCRETE BLOCK SCREEN, FACING NORTHEAST. - New Orleans City Railroad Company, Canal Station, Square 365, bounded by Canal, North Dupre, Iberville, & North White Streets, New Orleans, Orleans Parish, LA

340

49. NORTHEAST FRONT ELEVATION OF BUILDING 365 (ARMAMENT TESTING BUILDING) ...  

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

49. NORTHEAST FRONT ELEVATION OF BUILDING 365 (ARMAMENT TESTING BUILDING) IN BASE SPARES AREA. - Loring Air Force Base, Weapons Storage Area, Northeastern corner of base at northern end of Maine Road, Limestone, Aroostook County, ME

341

2. A LONG VIEW, LOOKING NORTHEAST FROM A SANDBAR LOCATED ...  

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

2. A LONG VIEW, LOOKING NORTHEAST FROM A SANDBAR LOCATED DOWN RIVER OF THE BRIDGE. THE VIEW SHOWS THE WEST OR DOWNSTREAM SIDE. - Cement Plant Road Bridge, Spanning Leatherwood Creek on County Road 50 South, Bedford, Lawrence County, IN

342

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

343

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

344

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

345

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

346

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

347

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

348

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

349

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

350

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

351

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

352

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

353

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

354

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

355

3. Exterior, detail view of north elevation, from northeast, showing ...  

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

3. Exterior, detail view of north elevation, from northeast, showing joint of addition. Sept. 12, 1940. Mixon. - Upper Swedish Log Cabin, Darby Creek vicinity, Clifton Heights (Upper Darby Township), Darby, Delaware County, PA

356

3. Northeast wall of Scrap Bins with freight car. ...  

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

3. Northeast wall of Scrap Bins with freight car. - Delaware, Lackawanna & Western Railroad, Scranton Yards, Scrap Platform, 350 feet South of South Washington Avenue & River Street, Scranton, Lackawanna County, PA

357

Exterior overall oblique view of the northeast and southeast sides ...  

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

Exterior overall oblique view of the northeast and southeast sides - U.S. Naval Base, Pearl Harbor, Scrap Metal Packaging Facility, Seventh Street between Facility Nos. 6 & 247, Pearl City, Honolulu County, HI

358

16. INTERIOR VIEW TO THE NORTHEAST OF ROOM 107, THE ...  

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

16. INTERIOR VIEW TO THE NORTHEAST OF ROOM 107, THE HOT STORAGE AND PACKAGING ROOM. - Nevada Test Site, Pluto Facility, Disassembly Building, Area 26, Wahmonie Flats, Cane Spring Road, Mercury, Nye County, NV

359

VIEW NORTHEAST, WEST GABLE ELEVATIONS AND OF ECCENTRIC HOUSE IN ...  

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

VIEW NORTHEAST, WEST GABLE ELEVATIONS AND OF ECCENTRIC HOUSE IN FOREGROUND AND ENGINE HOUSE IN REAR, NOTE ROD LINES EXITING ECCENTRIC HOUSE. - Golden Oil Company, Lot 410 Lease, Sheffield Field, Donaldson, Warren County, PA

360

1. Context view of northeast corner of observation blockhouse, with ...  

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

1. Context view of northeast corner of observation blockhouse, with Building 202 in background. View looking south from hill north of observation blockhouse. - Rocket Engine Testing Facility, Observation Blockhouse, NASA Glenn Research Center, Cleveland, Cuyahoga County, OH

361

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

362

3. View from northeast corner, Canisteo and Spruce Streets. Photo ...  

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

3. View from northeast corner, Canisteo and Spruce Streets. Photo shows the garage area (Building #5) with sawtooth roofline and front elevation of Buildings #6 and #1. - Merrill Silk Mill, 233 Canisteo Street, Hornell, Steuben County, NY

363

TENANT HOUSE INTERIOR, KITCHEN, NORTH AND EAST WALLS, LOOKING NORTHEAST ...  

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

TENANT HOUSE INTERIOR, KITCHEN, NORTH AND EAST WALLS, LOOKING NORTHEAST FROM CENTER OF ROOM - Irvine Ranch Agricultural Headquarters, Carillo Tenant House, Southwest of Intersection of San Diego & Santa Ana Freeways, Irvine, Orange County, CA

364

Looking northeast on the mezzanine toward circuit breakers, towards the ...  

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

Looking northeast on the mezzanine toward circuit breakers, towards the coc indicator panel room - March Air Force Base, Strategic Air Command, Utility Building, 5220 Riverside Drive, Moreno Valley, Riverside County, CA

365

8. NORTHEAST CORNER OF ORIGINAL MILL WITH SMALL ADDITIONS AND ...  

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

8. NORTHEAST CORNER OF ORIGINAL MILL WITH SMALL ADDITIONS AND OUTBUILDINGS. NOTE ORIGINAL DUST CHIMNEY ON RIGHT AND WATER TOWER ON LEFT. - Selma Cotton Mill, 218 Morgan Avenue, Selma, Dallas County, AL

366

EXTERIOR VIEW OF THE REAR AND NORTHEAST SIDE OF BUILDING ...  

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

EXTERIOR VIEW OF THE REAR AND NORTHEAST SIDE OF BUILDING 190 FACING SOUTH. - U.S. Naval Base, Pearl Harbor, Warehouse & Cold Storage Building, North corner of Pokomoke Street & Hornet Avenue, Pearl City, Honolulu County, HI

367

1. Cold Storage Warehouse, east facade. Northeast corner of the ...  

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

1. Cold Storage Warehouse, east facade. Northeast corner of the north facade of the Ice Plant is visible on the left. Far left, the Creamery. - Curtis Wharf, Cold Storage Warehouse, O & Second Streets, Anacortes, Skagit County, WA

368

1. SOUTHWEST CORNER FROM POINT SOUTHWEST OF BUILDING, LOOKING NORTHEAST, ...  

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

1. SOUTHWEST CORNER FROM POINT SOUTHWEST OF BUILDING, LOOKING NORTHEAST, WITH GEAR SHED IN FOREGROUND. - Oakland Naval Supply Center, Cold Storage Warehouse, South of C Street between First & Second Street, Oakland, Alameda County, CA

369

EXTERIOR VIEW OF THE FRONT AND NORTHEAST SIDE OF BUILDING ...  

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

EXTERIOR VIEW OF THE FRONT AND NORTHEAST SIDE OF BUILDING 190 FACING WEST. - U.S. Naval Base, Pearl Harbor, Warehouse & Cold Storage Building, North corner of Pokomoke Street & Hornet Avenue, Pearl City, Honolulu County, HI

370

Oblique view of southeast side and northeast end from across ...  

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

Oblique view of southeast side and northeast end from across South Avenue. - U.S. Naval Base, Pearl Harbor, Boiler House & Cold Storage, Butchers Shop & Dry Stores Building, South Avenue near Salvor Street, Pearl City, Honolulu County, HI

371

12. VIEW OF NATURAL BRIDGE OVERLOOK PARKING AREA, FACING NORTHEAST. ...  

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

12. VIEW OF NATURAL BRIDGE OVERLOOK PARKING AREA, FACING NORTHEAST. NOTE DETERIORATION OF WALL AND USE OF AESTHETICALLY INTRUSIVE FENCING. - Bryce Canyon National Park Rim Road, State Highway 63 to Rainbow Point, Tropic, Garfield County, UT

372

8. DETAIL VIEW, LOOKING NORTHEAST, SHOWING OUTRIGGERS FOR LATERAL BRACING ...  

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

8. DETAIL VIEW, LOOKING NORTHEAST, SHOWING OUTRIGGERS FOR LATERAL BRACING FOR TRUSSES AND BOTTOM CHORD CONNECTIONS. - White Bowstring Arch Truss Bridge, Spanning Yellow Creek at Cemetery Drive (Riverside Drive), Poland, Mahoning County, OH

373

99. POWER DISTRIBUTION UNITS FOR BATTERIES AND RECTIFIERS, NORTHEAST SIDE ...  

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

99. POWER DISTRIBUTION UNITS FOR BATTERIES AND RECTIFIERS, NORTHEAST SIDE OF LANDLINE INSTRUMENTATION ROOM (106), LSB (BLDG. 770) - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

374

118. INTERIOR OF CABLE DISTRIBUTION CABINETS ON NORTHEAST SIDE OF ...  

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

118. INTERIOR OF CABLE DISTRIBUTION CABINETS ON NORTHEAST SIDE OF LANDLINE INSTRUMENTATION ROOM (206), LSB (BLDG. 751) - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

375

2. MAGAZINE P, WITH ENTRANCE DOOR IN FOREGROUND, LOOKING NORTHEAST. ...  

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

2. MAGAZINE P, WITH ENTRANCE DOOR IN FOREGROUND, LOOKING NORTHEAST. - NIKE Missile Base C-84, Underground Storage Magazines & Launcher-Loader Assemblies, Easternmost portion of launch area, Barrington, Cook County, IL

376

1. STONE CABIN II FROM ABOVE NORTHEAST CORNER. CAMERA POINTED ...  

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

1. STONE CABIN II FROM ABOVE NORTHEAST CORNER. CAMERA POINTED WEST. - Florida Mountain Mining Sites, Stone Cabin II, West slope Florida Mountain, East of Empire State Mine below summit, Silver City, Owyhee County, ID

377

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

378

Interior of Right Powerhouse, looking northeast, showing shaft from Francis ...  

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

Interior of Right Powerhouse, looking northeast, showing shaft from Francis turbine (below) extending to the generator (above). This is unit G-10. - Columbia Basin Project, Grand Coulee Dam Powerplant Complex, Grand Coulee, Grant County, WA

379

6. VIEW SHOWING NORTHEAST END OF WHARF REAR FROM LANDSLIDE ...  

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

6. VIEW SHOWING NORTHEAST END OF WHARF REAR FROM LANDSLIDE - U.S. Naval Base, Pearl Harbor, Berthing Wharf S378, Beckoning Point, Southeast of Cowpens Street, Ford Island, Pearl City, Honolulu County, HI

380

7 CFR 1001.2 - Northeast marketing area.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Northeast marketing area. 1001.2 Section 1001.2 Agriculture...Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Milk), DEPARTMENT...

2011-01-01

381

7 CFR 1001.2 - Northeast marketing area.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2009-01-01 true Northeast marketing area. 1001.2 Section 1001.2 Agriculture...Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Milk), DEPARTMENT...

2010-01-01

382

14. Overview of bay without sluice gate machinery to northeast ...  

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

14. Overview of bay without sluice gate machinery to northeast - Mississippi River 9-Foot Channel, Lock & Dam No. 1, In Mississippi River at Mississippi Boulevard, below Ford Parkway Bridge, Saint Paul, Ramsey County, MN

383

5. Overview of bay with geared mechanism to northeast ...  

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

5. Overview of bay with geared mechanism to northeast - Mississippi River 9-Foot Channel, Lock & Dam No. 1, In Mississippi River at Mississippi Boulevard, below Ford Parkway Bridge, Saint Paul, Ramsey County, MN

384

11. Overview of bay with hydraulic mechanism to northeast ...  

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

11. Overview of bay with hydraulic mechanism to northeast - Mississippi River 9-Foot Channel, Lock & Dam No. 1, In Mississippi River at Mississippi Boulevard, below Ford Parkway Bridge, Saint Paul, Ramsey County, MN

385

1. Distant view of lock and dam to northeast ...  

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

1. Distant view of lock and dam to northeast - Mississippi River 9-Foot Channel, Lock & Dam No. 1, In Mississippi River at Mississippi Boulevard, below Ford Parkway Bridge, Saint Paul, Ramsey County, MN

386

17. VIEW OF THE DIAMOND MINEYARD LOOKING NORTHEAST. THE DRIES ...  

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

17. VIEW OF THE DIAMOND MINEYARD LOOKING NORTHEAST. THE DRIES ARE ON THE LEFT, WITH THE TAR HOUSE, TOILET, AND ROPE CLAMP CLEANING BUILDING TO THE RIGHT - Butte Mineyards, Diamond Mine, Butte, Silver Bow County, MT

387

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

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

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

388

VIEW OF WEST SIDE AND SOUTH FRONT (PARTIAL), FACING NORTHEAST. ...  

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

VIEW OF WEST SIDE AND SOUTH FRONT (PARTIAL), FACING NORTHEAST. - Douglas Aircraft Company Long Beach Plant, Aircraft Final Assembly Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

389

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

390

Interior wall, truss, and roof detail. View to northeast ...  

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

Interior wall, truss, and roof detail. View to northeast - Duluth & Iron Range Rail Road Company Shops, Foundry, Southwest of downtown Two Harbors, northwest of Agate Bay, Two Harbors, Lake County, MN

391

4. Northeast portion of rear wall of main section of ...  

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

4. Northeast portion of rear wall of main section of roundhouse. View to southwest. - Duluth & Iron Range Rail Road Company Shops, Roundhouse, Southwest of downtown Two Harbors, northwest of Agate Bay, Two Harbors, Lake County, MN

392

9. DETAIL VIEW OF ROLLING EXPANSION JOINT, NORTHEAST BASE OF ...  

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

9. DETAIL VIEW OF ROLLING EXPANSION JOINT, NORTHEAST BASE OF SECOND CLOSED SPANDREL ARCH AT JUNCTION OF OPEN SPANDREL ARCH, LOOKING EAST - Virgin River Bridge, Spanning Virgin River on State Highway 9, Hurricane, Washington County, UT

393

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

394

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

395

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

396

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

397

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

398

Perspective view looking from the northeast, from approximately the same ...  

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

Perspective view looking from the northeast, from approximately the same vantage point as in MD-1109-K-12 - National Park Seminary, Japanese Bungalow, 2801 Linden Lane, Silver Spring, Montgomery County, MD

399

6. Oblique view of Cherry Hill lettuce shed looking northeast, ...  

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

6. Oblique view of Cherry Hill lettuce shed looking northeast, with chute building to the right - Richmond Hill Plantation, Cherry Hill Lettuce Shed, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

400

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

401

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

402

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

403

South and west elevations of tractor shed facing northeast ...  

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

South and west elevations of tractor shed facing northeast - Norris Farm, Tractor Shed-Combine Barn, .5 mile west of County Road 857 & .25 mile east of County Road 88/1, Cheat Neck, Monongalia County, WV

404

Wave spectral energy variability in the northeast Peter D. Bromirski  

E-print Network

in the central North Pacific as well as the tendency for more extreme waves in the south during El Nin~o episodes that storminess has increased in the northeast Pacific since 1980. This trend is emphasized at central eastern

Bromirski, Peter D.

405

1. View looking Northeast of Huber Breaker (left), Retail Coal ...  

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

1. View looking Northeast of Huber Breaker (left), Retail Coal Storage Bins (center), and Power Station (right foreground) Photograph taken by George Harven - Huber Coal Breaker, Breaker, 101 South Main Street, Ashley, Luzerne County, PA

406

28. View looking Northeast, Huber Breaker (left), Retail Coal Storage ...  

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

28. View looking Northeast, Huber Breaker (left), Retail Coal Storage Bins (Center) Power Plant (right) Photograph taken by George Harven - Huber Coal Breaker, 101 South Main Street, Ashley, Luzerne County, PA

407

29. Another view looking Northeast closer to Huber Breaker (left), ...  

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

29. Another view looking Northeast closer to Huber Breaker (left), Retail Coal Storage Bins (Center), Power Plant (right) Photograph taken by George Harven - Huber Coal Breaker, 101 South Main Street, Ashley, Luzerne County, PA

408

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

409

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

410

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

411

Cenozoic denudation of the Menderes Massif and its geodynamic framework: slab tear or not?  

NASA Astrophysics Data System (ADS)

Despite having experienced similar rates of convergence during the Alpine Orogeny, the Hellenides and Anatolides display fundamental differences in crust and mantle structure across a region that broadly coincides with the Aegean coastline of the Anatolian peninsula. The Menderes Massif experienced early Miocene tectonic denudation and surface uplift in the footwall of a north-directed extensional detachment system, followed by late Miocene to recent fragmentation by E-W and NW-SE trending graben systems, resulting in one of Earth's largest metamorphic core complexes. Based on the interpretation of geological and geophysical data we propose that the tectonic denudation of the Menderes Massif was caused by late Oligocene/early Miocene lithosphere scale transtension along the boundary of the Adriatic and Anatolian lithospheric domains, when rollback of the Aegean slab affected the Aegean-Menderes section of the Tethyan Orogen. In addition to previously hypothesized crustal discontinuities, gravity data, earthquake locations and seismic velocity anomalies highlight a north-south oriented boundary in the upper mantle between a fast slab below the Aegean and a slow asthenospheric region below western Turkey. As an alternative to the common interpretation of this discontinuity representing the western edge of a slab tear, we propose that the change in lithospheric structure is the result of how different lithosphere domains responded to roll-back: relatively slow removal of lithospheric mantle below western Anatolia versus trench retreat in the rapidly extending Aegean Sea region. Our findings highlight the significance of lateral variations in subduction-collision systems for the formation of continental plateaux and metamorphic core complexes.

Gessner, Klaus; Gallardo, Luis; Markwitz, Vanessa; Ring, Uwe; Thomson, Stuart

2014-05-01

412

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

413

Proterozoic massif anorthosites and related rocks in Labrador: the anorthosite-charnockite connection  

SciTech Connect

Massif anorthosites of Labrador are closely associated in space and time with voluminous, felsic, fayalite- and ferrous pyroxene-bearing igneous rocks. These include charnockites, monzonites, biotite-hornblende granites, and locally syenites. Igneous charnockites form major parts of some of the granitic complexes. In Mistastin batholith for example, charnockitic assemblages comprise about 35% of a total area of 6500 sq. km. Feldspar pairs and coexisting fayalite-opx-qtz in these rocks indicate P and T near 3.5 kb, 750/sup 0/C, assumed to represent near solidus equilibration. Diorites and monzonites intruded by charnockite have mesoperthites implying crystallization T>900/sup 0/C presumably recording earlier stages of crystallization. Oxide and silicate assemblages indicate redox conditions between FMQ and WM oxygen buffers and water pressures well below Ptotal. Younger biotite-hornblende granites and quartz syenites lack Ti-mt. but retain fayalite suggesting that magmatic crystallization was largely closed to water and oxygen. Initial Sr isotope ratios in charnockite-granite suites of central labrador support derivation of the magmas largely or entirely from crustal source rocks. Compositions of mafic silicates and plagioclase, associated Fe-Ti oxide concentrations, trace elements and Sr isotopes in massif anorthosites are in accord with the rocks being crystallization products of substantially fractionated, originally more mafic, mantle magmas. Close association of high temperature, water-poor, reduced crustal melts is consistent with a fusion process in which heat supply and oxygen buffering were controlled by fractional crystallization of a substantial body of mafic magma subjacent to continental crust.

Emslie, R.F.

1985-01-01

414

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

415

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

416

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

417

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

418

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

419

57. INTERIOR VIEW LOOKING NORTHEAST IN THE BOILER ROOM. NOTE ...  

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

57. INTERIOR VIEW LOOKING NORTHEAST IN THE BOILER ROOM. NOTE THE FLY WHEEL FROM THE ORIGINAL STEAM ENGINE AND A STAIRWAY LEADING ONTO THE STAMP BATTERY FLOOR. MAKERS LATE AT BASE OF STACK SAYS; PRESCOTT SCOTT AND CO. BUILDERS 1879. CAST INTO BOILER FRONT AT LOWER PLANT CORNER IT SAYS: H.J. BOOTH AND CO. BUILDERS, SF. 1874. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

420

Aspidochirotida (Echinodermata: Holothuroidea) from the northeast coast of Brazil.  

PubMed

This is a taxonomic work on the aspidochirotid sea cucumbers from shallow waters in Northeast Brazil. We studied 165 specimens, classified into 2 families, 3 genera, 7 subgenera and 9 species. Descriptions, illustrations and literature data are included for each species, in addition to ecological notes and information on their distribution in the northeast coast of Brazil. A taxonomic key is provided for the identification of the species. PMID:25544137

Prata, Jéssica; Manso, Cynthia L C; Christoffersen, Martin L

2014-01-01

421

24. View toward the northeast of the interior of the ...  

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

24. View toward the northeast of the interior of the blacksmith shop. Note the wall-hung crane on the east wall at the right. The olden door at the left led to the material track; the ramp and door in the northeast corner (center of photograph) gave access to the material platform. - Central Railroad of New Jersey, Engine Terminal, Jersey City, Hudson County, NJ

422

Field recovery of layered tektites in northeast Thailand  

Microsoft Academic Search

We recovered Australasian tektites in place throughout a 40×130 km region in northeast Thailand extending from the Laotian border westward to a line connecting Na Pho Klang in the northeast through Det Udom to Nam Yun in the south. With two exceptions, in sites near the western edge of this region, all fragments are layered (muong-Nong-type) tektites. It appears that

John T. Wasson; Kaset Pitakpaivan; Prinya Putthapiban; Sirot Salyapongse; Boonlom Thapthimthong; John F. McHone

1995-01-01

423

2. Credit BG. View down dust ditch at northeast side ...  

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

2. Credit BG. View down dust ditch at northeast side of A Street, looking north northwest in "the loop". Note culverts used to give vehicular and pedestrian access to buildings northeast of A Street, some foundations of which may be seen at right of view. Structures in background belong to Jet Propulsion Laboratory Edwards Facility. - Edwards Air Force Base, North Base, Dust Ditch System, Traversing North Base, Boron, Kern County, CA

424

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.

425

Crustal thinning recorded by the shape of the Namurian-Westphalian leucogranite in the Variscan belt of the northwest Massif Central, France  

NASA Astrophysics Data System (ADS)

In the western part of the Variscan belt of the French Massif Central, the Guéret massif is an extensional allochthon emplaced to the southeast during Namurian-Westphalian time. The internal structure of the coeval leucogranites surrounding the western edge of the Guéret massif consists of the Plateau d'Aigurande, Brame-St. Sylvestre, and St. Goussaud massifs. These plutons are asymmetric diapirs rooted in the Marche, Bussière-Madeleine, and Arrènes faults, respectively. The plutons indicate diverging extravasation from the Guéret massif. Whatever their shapes, the plutons have a northwest-trending stretching lineation that is also marked in the granite host rocks by retrograde metamorphic minerals. The same extension direction is also inferred from Namurian-Westphalian leucogranites and dikes intruding the Guéret massif. Extension-related granitoids present typical structural patterns such as asymmetric shapes, extravasation from the collapsing area, and persistence of a stretching lineation parallel to the regional extension direction. These features may be used to diagnose crustal thinning.

Faure, Michel; Pons, José

1991-07-01

426

Ages and petrogenetic significance of igneous mangerite-charnockite suites associated with massif anorthosites, Grenville Province  

Microsoft Academic Search

U-Pb ages of zircon fractions of major anorthosite-mangerite-charnockite-granite (AMCG) igneous suites imply that this magmatism inaugurated what is widely regarded as the Grenvillian event between about 1.16 and 1.12 Ga ago over about two-thirds of the Grenville Province east, northeast, and southeast of the Central Metasedimentary Belt. Pre-Grenvillian AMCG suites about 1.36 and 1.64 Ga old have much more restricted

Ronald F. Emslie; Patricia A. Hunt

1990-01-01

427

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

428

The Carboniferous volcano-sedimentary depocentre of Tazekka Massif (Middle-Atlas, Morocco): new observations and geodynamic implications  

NASA Astrophysics Data System (ADS)

The integrated analysis of thrust structures and facies allows us to interpret the Carboniferous volcano-sedimentary complex of Tazekka massif as a compressive sub-basin controlled mainly by the Hajra Sbaa-Merja Caï'd northwest-verging thrust-propagation fold. The tectono-sedimentary sequence (conglomerates, greywacke and shale) is associated with an extrusive magmatism comprising basalts, andesites and rhyolites, under effusive and volcanoclastic facies (or rhyolites with exotic blocks), of orogenic calk-alkaline nature, which is consistent with a context of continental subduction. These results, and the comparison of regional contraction ages in the Moroccan Meseta, integrate the Carboniferous volcano-sedimentary depocentre of Tazekka massif in the wedgetop depozone of a foreland basin system generated by two north-west thrusted piggy-back sequences (aged from Fameno-Tournaisian to upper Visean-lower Westphalian) from the eastern Meseta to the western Meseta of Morocco.

Bennouna, Azzeddine; Abbou, Mohamed Ben; Hoepffner, Christian; Kharbouch, Fatima; Youbi, Nasrrddine

2004-06-01

429

Zircon UPb age of the Paramo Rico tonalite-granodiorite, Santander Massif (Cordillera Oriental, Colombia) and its geotectonic significance  

Microsoft Academic Search

We present the first U-Pb data, which document the existence of early Mesozoic magmatism in the Santander Massif, within the Cordillera Oriental of Colombia. Zircon fractions separated from a tonalite and a granodiorite of the Paramo Rico intrusion yield crystallization ages of 205–210 Ma. Biotite K-Ar ages of other intrusions in this region range from 177 to 210 Ma, overlapping

W. Dorr; J. R Grösser; G. I Rodriguez; U Kramm

1995-01-01

430

Retrograde evolution of eclogites: evidences from microstructures and 40 Ar\\/ 39 Ar white mica dates, Münchberg Massif, northern Bavaria  

Microsoft Academic Search

Phengites from eclogites and pegmatites (3T, 2M1, coarse-grained and recrystallized) of the Münchberg Massif (Weissenstein and Oberkotzau) have been dated by the 40Ar\\/39Ar method. 3T-micas from the eclogites yielded plateau and isochron ages of 365±7 Ma. 2M1-micas show disturbed degassing spectra. Micas from pegmatites show a slight excess Ar component, with an isochron age of 353 to 351±3 Ma. An

K. Hammerschmidt; G. Franz

1992-01-01

431

Fullerene C 60 in Solid Bitumen Accumulations in NeoProterozoic Pillow-Lavas at Mítov (Bohemian Massif)  

Microsoft Academic Search

Fullerene C60occurs at extremely low concentration (0.2?0.3 ppm) in hard solid bitumen that was accumulated in the pillow lava bodies exposed at M?tov (Tepl?-Barrandian Neo-proterozoic of the Bohemian Massif). No higher fullerenes were documented. The C60fullerene and its precursors are present in non-graphitic and non-graphitizable carbonaceous matter. Inclusions of fullerene are found embedded within glass-like carbons that are found within

Jan Jehli?ka; Otakar Frank

2006-01-01

432

Geological mapping strategy using visible near-infrared-shortwave infrared hyperspectral remote sensing: Application to the Oman ophiolite (Sumail Massif)  

Microsoft Academic Search

An airborne hyperspectral survey of the Oman ophiolite (Sumail Massif) has been conducted using the HyMap airborne imaging spectrometer with associated field measurements (GER 3700). An ASD FieldSpec3 spectrometer was also used in order to constrain the spectral signatures of the principal lithologies cropping out in the surveyed area. Our objective was to identify and map the various igneous lithologies

R. Roy; P. Launeau; V. Carrère; P. Pinet; G. Ceuleneer; H. Clénet; Y. Daydou; J. Girardeau; I. Amri

2009-01-01

433

Geological mapping strategy using visible near-infrared–shortwave infrared hyperspectral remote sensing: Application to the Oman ophiolite (Sumail Massif)  

Microsoft Academic Search

An airborne hyperspectral survey of the Oman ophiolite (Sumail Massif) has been conducted using the HyMap airborne imaging spectrometer with associated field measurements (GER 3700). An ASD FieldSpec3 spectrometer was also used in order to constrain the spectral signatures of the principal lithologies cropping out in the surveyed area. Our objective was to identify and map the various igneous lithologies

R. Roy; P. Launeau; V. Carrère; P. Pinet; G. Ceuleneer; H. Clénet; Y. Daydou; J. Girardeau; I. Amri

2009-01-01

434

Multi-isotopic (Li, B, Sr, Nd) approach for geothermal reservoir characterization in the Limagne Basin (Massif Central, France)  

Microsoft Academic Search

A multi-isotopic study of thermo-mineral waters from the Limagne Basin (French Massif Central) is reported. Lithium, B, Sr and Nd isotopic signatures in thermo-mineral waters and bedrocks were combined in order to determine the origin of these fluids from a reservoir point of view. Strontium and Nd isotopic systems showed that the thermo-mineral waters are mostly derived from a granitic

R. Millot; Ph. Négrel; E. Petelet-Giraud

2007-01-01

435

35 Ma old ultrahigh-pressure metamorphism and evidence for very rapid exhumation in the Dora Maira Massif, Western Alps  

Microsoft Academic Search

Ion microprobe (SHRIMP) data on zircons from various rock types of an ultrahigh-pressure (UHP) metamorphic whiteschist-type pyrope quartzite lens of the Dora Maira Massif (DMM) consistently show domains giving a Late Eocene age of 35.4 ± 1.0 Ma which is taken as the age of UHP metamorphism. These domains partially replace the older oscillatory zoning pattern of the zircons formed

D. Gebauer; H.-P. Schertl; M. Brix; W. Schreyer

1997-01-01

436

Unearthing deep-time biodiversity changes: The Palaeogene mammalian metacommunity of the Quercy and Limagne area (Massif Central, France)  

Microsoft Academic Search

The long-term changes of the mammalian diversity of the Quercy and Limagne area (Massif Central, France) is quantitatively investigated through a ?16-Myr time span running from the late Middle Eocene (?38Myr) to the Early Miocene (?22Myr). Within the specific context of ecosystem response to extreme climatic events, the goal of such a deep-time approach to local community and regional metacommunity

Gilles Escarguel; Serge Legendre; Bernard Sigé

2008-01-01

437

Phanerozoic polyorogenic deformation in southern Jiuling Massif, northern South China block: Constraints from structural analysis and geochronology  

NASA Astrophysics Data System (ADS)

The structure of the Jiuling Massif has been investigated in order to delineate the polyorogenic deformation and discuss its geodynamic evolution and orogenic mechanisms. Detailed structural analysis indicates that the D1 event is characterized by top-to-the NNW ductile shearing with pervasive foliation, and mineral and stretching lineation developed in the entire region. Compared with the D1 deformation, D2 structures are localized in ductile shear zones with subvertical foliation and subhorizontal E-W trending lineation, indicating a dextral ductile shearing. The D3 event, marked by folds and thrusts mainly in a brittle domain, modified the D1 structures by asymmetrical folds. The dominant D4 structures are gravitational folds and normal faults, corresponding to a later extension. Our new geochronological data suggest that the D1 event occurred between 465 and 380 Ma with D2 dextral shearing at the end of this Early Paleozoic orogen, and the D3 event has been constrained at 245-215 Ma. The final uplift of the Jiuling Massif by the D4 event can be correlated with the Late Mesozoic extension across the eastern South China block. Along with previous studies in the South China block, the structural pattern of the Jiuling Massif elucidates the influence of the Early Paleozoic and Early Mesozoic intracontinental belts triggered by repeated reactivation of the Jiangshan-Shaoxing Fault. Combined with deformation to the south, the Early Paleozoic belt shows a positive flower pattern, with opposing kinematics, rooted in the Jiangshan-Shaoxing Fault. During the Early Mesozoic, a general intracontinental belt was developed with uniform kinematics in both the Jiuling Massif and the Xuefengshan Belt, possibly resulted from the far-field effect of the Triassic NW-directed Paleo-Pacific subduction.

Chu, Yang; Lin, Wei

2014-06-01

438

A Paleomagnetic study on the tectonic evolution of the Nigde-Kirsehir massif and the Taurides since the Mesozoic-Cenozoic  

NASA Astrophysics Data System (ADS)

The main tectonic domains of Turkey consist of several different assemblages of microcontinents represented by the Istranca massif, Istanbul Zone, Sakarya Zone, Nigde-Kirsehir Massif, Anatolide-Tauride block, and the Arabian platform. It is widely reported that the borders between these fragments are represented by suture zones, which resulted from the closure of different branches of the Neotethian Ocean. The northern suture zone, the Izmir-Ankara-Erzincan suture zone, is well known, whereas the suture zone between the Nigde-Kirsehir massif and the Taurides has been a subject of debate. It has been proposed that the Nigde-Kirsehir massif rifted from the Taurides-Anatolides in the Mesozoic and that the Intra-Tauride Ocean lay between these blocks. Other researchers have alternatively proposed that the Intra-Tauride Ocean between the Taurides-Anatolides and the Nigde-Kirsehir massif never existed, and assume that the it is a promontory of the Taurides. Paleomagnetic rotations obtained from a previous study indicate oroclinal bending in the Late Cretaceous in the northern part of the Nigde-Kirsehir massif due to its northwards indentation onto the Sakarya zone. However the southern deformation history of the Nigde-Kirsehir massif during Mesozoic has not been investigated. We have carried out a paleomagnetic study on the southern part of the massif, using a total of 120 sites that are of Late Jurassic to Miocene in age, to constrain the paleotectonic evolution of the Nigde-Kirsehir massif and its surrounding area. A paleolatitude of 17°N is obtained for the Late Jurassic-Lower Cretaceous Tauride carbonate platform, whereas Late Cretaceous arc volcanics from the suture zone around the Nigde-Kirsehir massif (Mersin ophiolite, Pozanti ophiolite) indicate a ~20°N paleolatitude. Both the Late Jurassic to Middle Eocene paleomagnetic declinations from the southeastern part of the investigation area indicates counterclockwise rotation, whereas Late Cretaceous declinations from the southwestern part, show rotations that are consistent with the curvature of the Neotethian suture zones.

Cengiz Cinku, M.; Mumtaz Hisarli, Z.; Hirt, A. M.; Ulker, B.; Oksum, E.; Kaya, N.; Setzer, F.; Yilmaz, Y.-; Orbay, N.

2013-12-01

439

Estimating present-day displacement fields and tectonic deformation in active mountain belts: an example from the Chartreuse Massif and the southern Jura Mountains, western Alps  

NASA Astrophysics Data System (ADS)

Determination of relative movements between the alpine foreland and the External Crystalline Massif is a key-point for the understanding of the present-day tectonics of the western Alps. In this study we try to test the continuity of the present-day tectonics with the Mio-Pliocene deformation. In particular, we will test if the present-day displacements are localized along the thrusts of the Jura Mountains, or along a blind thrust in the Bas Dauphiné Molasse Basin. Definition of relative movements is achieved by several methods, including a comparison of two high precision leveling networks to estimate vertical displacements, horizontal deformation measurements performed by triangulation/triangulation and triangulation/GPS comparison, in situ stress measurements performed in the different tectonic units and geomorphologic observations that constrain the location and the magnitude of the Quaternary deformation. Comparison of leveling data demonstrates: (1) an uplift of the southern Bas Dauphiné Molasse Basin relative to its northern part (0.8 mm/year), also revealed by geomorphologic analysis, (2) a significant uplift of the most external jurassian anticlines (0.8 to 2 mm/year), also recorded by the deformation of a paleo-river bed, and (3) an important uplift (up to 2 mm/year) of the Subalpine Massifs. The horizontal strain estimated from comparison of horizontal geodetic data (triangulation, GPS) shows (1) a NW-SE directed shortening between the eastern Chartreuse Massif and the Bas Dauphiné Molasses Basin (approximately 3 mm/year), (2) an E-W-directed shortening in the Jura Mountains (approximately 4-3 mm/year) and (3) a dextral strike-slip motion consistent with focal mechanisms along a NNE-SSW direction between the eastern Chartreuse Massif and the eastern Belledonne Massif. These data reveal a present-day strain partitioning between the Belledonne External Crystalline Massif and the Bas Dauphiné Molasses Basin. The westward motion of the Subalpine Massifs is partitioned along two southern jurassian thrust-folds, and a dextral NNE-SSW strike-slip shear zone between the Chartreuse Massif and the Belledonne Massif. This strain partitioning is also accompanied by a stress partitioning between the alpine foreland and the External Crystalline Massifs.

Jouanne, François; Genaudeau, Nicolas; Ménard, Gilles; Darmendrail, Xavier

1998-11-01

440

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

441

Extensional deformation along the southern boundary of the Gyeonggi Massif, South Korea: structural characteristics, age constraints, and tectonic implications  

NASA Astrophysics Data System (ADS)

The Permo-Triassic collision of the North and South China blocks caused the development of the Dabie-Sulu Orogen in China and Songrim Orogen in the Korean Peninsula. Extension after this collision is known from the Dabie-Sulu Orogen, but post-orogenic extension is not well defined in the Korean Peninsula. Extensional deformation along the southern boundary of the Gyeonggi Massif in Korea is characterized by top-down-to-the-south ductile shearing and subsequent brittle normal faulting, and was predated by regional metamorphism and north-vergent contractional deformation. Extension occurred between ~220 and 185 Ma based on the ages of pre-extensional regional metamorphism and post-extensional pluton emplacement. 40Ar/39Ar dating of syn-extensional muscovite in quartz-mica mylonite yields an age of 187.8 ± 5.6 (2 ?) Ma, in agreement with constraints from structural relationships. Together with the extensional deformation identified along the northern boundary of the Gyeonggi Massif (~226 Ma), the extension along the southern boundary is probably related to the exhumation of the massif during late-orogenic or post-orogenic extension associated with the Songrim Orogeny of the Korean Peninsula and forms an important event in the Phanerozoic crustal evolution of East Asia.

Han, Raehee; Min, Kyoungwon; Ree, Jin-Han; Foster, David A.

2014-04-01

442

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

443

Extension in Mona Passage, Northeast Caribbean  

USGS Publications Warehouse

As shown by the recent Mw 7.0 Haiti earthquake, intra-arc deformation, which accompanies the subduction process, can present seismic and tsunami hazards to nearby islands. Spatially-limited diffuse tectonic deformation within the Northeast Caribbean Plate Boundary Zone likely led to the development of the submerged Mona Passage between Puerto Rico and the Dominican Republic. GPS geodetic data and a moderate to high level of seismicity indicate that extension within the region is ongoing. Newly-collected high-resolution multibeam bathymetry and multi-channel seismic reflection profiles and previously-collected samples are used here to determine the tectonic evolution of the Mona Passage intra-arc region. The passage is floored almost completely by Oligocene-Pliocene carbonate platform strata, which have undergone submarine and subaerial erosion. Structurally, the passage is characterized by W- to NNW-trending normal faults that offset the entire thickness of the Oligo-Pliocene carbonate platform rocks. The orientation of these faults is compatible with the NE-oriented extension vector observed in GPS data. Fault geometry best fits an oblique extension model rather than previously proposed single-phase, poly-phase, bending-moment, or rotation extension models. The intersection of these generally NW-trending faults in Mona Passage with the N-S oriented faults of Mona Canyon may reflect differing responses of the brittle upper-crust, along an arc-forearc rheological boundary, to oblique subduction along the Puerto Rico trench. Several faults within the passage, if ruptured completely, are long enough to generate earthquakes with magnitudes on the order of Mw 6.5-7. ?? 2010.

Chaytor, J.D.; ten Brink, U.S.

2010-01-01

444

Extension in Mona Passage, Northeast Caribbean  

NASA Astrophysics Data System (ADS)

As shown by the recent M w 7.0 Haiti earthquake, intra-arc deformation, which accompanies the subduction process, can present seismic and tsunami hazards to nearby islands. Spatially-limited diffuse tectonic deformation within the Northeast Caribbean Plate Boundary Zone likely led to the development of the submerged Mona Passage between Puerto Rico and the Dominican Republic. GPS geodetic data and a moderate to high level of seismicity indicate that extension within the region is ongoing. Newly-collected high-resolution multibeam bathymetry and multi-channel seismic reflection profiles and previously-collected samples are used here to determine the tectonic evolution of the Mona Passage intra-arc region. The passage is floored almost completely by Oligocene-Pliocene carbonate platform strata, which have undergone submarine and subaerial erosion. Structurally, the passage is characterized by W- to NNW-trending normal faults that offset the entire thickness of the Oligo-Pliocene carbonate platform rocks. The orientation of these faults is compatible with the NE-oriented extension vector observed in GPS data. Fault geometry best fits an oblique extension model rather than previously proposed single-phase, poly-phase, bending-moment, or rotation extension models. The intersection of these generally NW-trending faults in Mona Passage with the N-S oriented faults of Mona Canyon may reflect differing responses of the brittle upper-crust, along an arc-forearc rheological boundary, to oblique subduction along the Puerto Rico trench. Several faults within the passage, if ruptured completely, are long enough to generate earthquakes with magnitudes on the order of M w 6.5-7.

Chaytor, Jason D.; ten Brink, Uri S.

2010-10-01

445

Microbial methanol uptake in northeast Atlantic waters  

PubMed Central

Methanol is the predominant oxygenated volatile organic compound in the troposphere, where it can significantly influence the oxidising capacity of the atmosphere. However, we do not understand which processes control oceanic concentrations, and hence, whether the oceans are a source or a sink to the atmosphere. We report the first methanol loss rates in seawater by demonstrating that 14C-labelled methanol can be used to determine microbial uptake into particulate biomass, and oxidation to 14CO2. We have found that methanol is used predominantly as a microbial energy source, but also demonstrated its use as a carbon source. We report biological methanol oxidation rates between 2.1 and 8.4?nmol l?1 day?1 in surface seawater of the northeast Atlantic. Kinetic experiments predict a Vmax of up to 29?nmol l?1 day?1, with a high affinity Km constant of 9.3?n in more productive coastal waters. We report surface concentrations of methanol in the western English channel of 97±8?n (n=4) between May and June 2010, and for the wider temperate North Atlantic waters of 70±13?n (n=6). The biological turnover time of methanol has been estimated between 7 and 33 days, although kinetic experiments suggest a 7-day turnover in more productive shelf waters. Methanol uptake rates into microbial particles significantly correlated with bacterial and phytoplankton parameters, suggesting that it could be used as a carbon source by some bacteria and possibly some mixotrophic eukaryotes. Our results provide the first methanol loss rates from seawater, which will improve the understanding of the global methanol budget. PMID:21068775

Dixon, Joanna L; Beale, Rachael; Nightingale, Philip D

2011-01-01

446

Link between surface temperature and documented rockfalls in the Mont Blanc massif rockwalls  

NASA Astrophysics Data System (ADS)

Recent studies show that rockfall activity has increased along the three past decades in high mountain areas, and permafrost degradation is regarded as the main triggering factor. 433 rockfalls affecting the steep rockwalls of the Mont Blanc massif have been inventoried and documented (time and precise location, topographical and geological settings, volume, conditions, etc.) from 2007 to 2011. With the aim of better understanding geomorphic processes, we address questions about the thermal state of the unstable rockwalls within this study area. A statistical model of the Mean Annual Rock Surface Temperature (MARST) for the 1961-1990 period has been implemented on a 4-m-resolution DEM of the Mont Blanc massif. The model runs with Potential Incoming Solar radiation (PISR) calculated with GIS tools and air temperature parameters computed from Chamonix Météo France's records. 87 rockfalls are located at the geographical margins of the DEM, where the PISR calculation doesn't take account of the surrounding hillshading and biased MARST simulation. Thus, only 346 rockfalls were kept and linked to a MARST value after data sorting. Preliminary results show that rockfalls occurred over a modelled MARST range of -6°C to 5°C. MARSTs ranging from -2.5°C to 2.5°C encompass about 60% of the rockfalls. The mean MARST value for the 346 rockfalls is of -0.9°C. Simulated warm permafrost areas (> -2°C) are therefore appearing as the most affected by instabilities. These first observations reinforce the hypothesis that permafrost degradation is likely the dominant triggering factor of these rockfalls. The 1961-1990 period is supposed to be representative of the conditions at depth that are not affected by the recent climate warming. This means that the here presented results are mainly valuable for rockfalls related to pluri-decadal signal. But they also suggest that MARST model is an interesting tool to explore the link between rockwall instability and permafrost state. Simulations at various time scales would allow more precise reconstruction of the bedrock temperature during each year of rockfalls. Model possibilities and the related outcomings will be also presented.

Magnin, Florence; Deline, Philip; Ravanel, Ludovic

2014-05-01

447

Holocene collapse of a mountain summit in the Belledonne massif (France): evidence from geomorphological mapping  

NASA Astrophysics Data System (ADS)

Rock avalanching is a high magnitude / low frequency process in mountain environment. It is an extremely rapid flow of fragmenting rock particles, with a volume > 1 M m3, involving a large amount of energy and travelling farther than expected with a normal sliding friction law. Rock avalanches are not uncommon in the Alps, in particular because of debuttressing of rock slopes due to glacier retreat and downwasting since the last Glacial maximum. The upper Vorz catchment basin is one of the few still glaciarized basins in the Belledonne massif (French external crystalline massif, peaking at 2977 m a.s.l.). A deposit related to a rock avalanche lies at the Habert du Mousset (1680 m a.s.l.), covering an area of 95 000 m2, tens of meters-thick and with a volume exceeding 1 M of m3. A geomorphological study suggests that the deposit should result from the collapse of the palaeo-summit of Roche Rousse (2753 m a.s.l. at present). The main part of the collapsed volume fell on the east side of the mountain ridge, but a smaller part probably travelled along the west side to form the deposit of the Habert du Mousset. Vertical and horizontal travel distances would have been 1100 m and 2750 m, respectively. The apparent coefficient of friction (height-over-length H/L ratio) is 0.4, indicating a highly mobile rock avalanche (H/L ratio is 0.62 with a ‘normal' coefficient of friction). Two elements support the hypothesis of a Holocene collapse: (i) glacial striations, rat tails, chattermarks and grooves are present on roches moutonnées up to 20 m to the crest. Those inherited glacial forms required a glacier thick enough to erode the bedrock. Because the surface of the Last Glacial Maximum glacier was standing well below this site (> 1000 m), only a local glacier could have form, which would have been impossible with the present topography. Thus, the palaeo-summit of Roche Rousse collapsed not before the Lateglacial. As suggested by (ii) the very steep, sometimes overhanging rock wall which forms the present east side of Roche Rousse, not glacially eroded, the collapse could have occurred after the Lateglacial.

Ravanel, L.; Allignol, F.; Deline, P.

2009-04-01

448

Groundwater hydrodynamics of ancient fan deltas: The case of Sant Llorenç del Munt Massif (NE Spain)  

NASA Astrophysics Data System (ADS)

Hydrogeological models based on well-exposed mountain massifs permitt to constrain the geological factors affecting water circulation and water-rock interaction. Our study adresses the question of how sudden lateral rock changes (sedimentologic facies evolution) affect hydrodinamics in the case of ancient fan deltas. A robust model for the Sant Llorenç del Munt massif (Eocene, Barcelona province) has been defined after the integration of geology (stratigraphy, sedimentology, mapping and integration of subsurface data) and groundwater hydrology (pumping tests, major ions hydrochemistry and environmental isotopes). Ten lito-hidrostratigraphic units have been recognized, which correspond to different sedimentary environments and have a distinctive response to water circulation and water-rock interaction. A remarkable point of this case study is that the size of the whole sedimentary system is considered, i.e. the lateral expansion of flow (lateral permeability barriers) is fully contrained. In terms of hydrogeology, hydraulic conductivity due to fracturing provide poor aquifers in 4 rock types. 5 hydrochemical groups have been established which allow explaining the evolution of the flow throughout the fan delta. Together with isotopic and stratigraphic data the main recharge areas have been determined. Flow dynamics throughout the system combines both surface runoff and subsurface flow. In proximal alluvial conglomerates, groundwater runs both vertically (fractures) and horizontally (fractured and karstified levels). Some features that are generally overlooked in hydrogeological studies (such as conglomerate petrology) are crucial for fracturation and karstic development. Laterally, conglomerates evolve to impermeable mudstones with sandstones (alluvial fan fringe). However, some conglomerates prograding locally reach distal (marine) sediments and recharge the fractured delta front sandstones aquifers that are also refilled by runoff waters. The end sediments (prodelta marls) provide an ultimate permeability barrier of the system. In general, lithologies arrangement due to past fluctuating distribution of sediments (sedimentary architecture) are crucial in the vertical and horizontal location of the aquifers levels. Interestingly, our study based on ancient rocks can also be applied to present day systems. Original sediments with important primary porosity are later better cemented (lithified) into indurated rocks and then more fracturated. So that, it indicates that in current and ancient fan deltas, better aquifers levels develop in the same strata independently of the transmisivity origin (primary porosity or fracturation).

Anglés, Marc; Folch, Albet; Oms, Oriol; Maestro, Eudald; Mas-Pla, Josep

2014-05-01

449

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

450

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

451

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

452

A Snowfall Impact Scale Derived from Northeast Storm Snowfall Distributions.  

NASA Astrophysics Data System (ADS)

A Northeast snowfall impact scale (NESIS) is presented to convey a measure of the impact of heavy snowfall in the Northeast urban corridor, a region that extends from southern Virginia to New England. The scale is derived from a synoptic climatology of 30 major snowstorms in the Northeast urban corridor and applied to the snowfall distribution of 70 snowstorms east of the Rocky Mountains. NESIS is similar in concept to other meteorological scales that are designed to simplify complex phenomena into an easily understood range of values. The Fujita scale for tornadoes and the Saffir Simpson scale for hurricanes measure the potential for destruction to property and loss of life by wind-related damage (and storm surge for Saffir Simpson) through use of a categorical ranking (0 or 1 5).

Kocin, Paul J.; Uccellini, Louis W.

2004-02-01

453

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

454

Natural annealing of dynamically recrystallised quartzite fabrics: Example from the Cévennes, SE French Massif Central  

NASA Astrophysics Data System (ADS)

Quartzite samples from the SW-Cévennes (French Massif Central) have been investigated in order to reveal the effects of annealing on a previously dynamically recrystallised quartz fabric. The studied quartzite is interlayered with turbiditic micaschist series, and after regional deformation the whole sequence was intruded by the St-Guiral granodiorite at 1-3 kbar and up to 650-700 °C. Recorded crystallographic preferred orientation (CPO) patterns of the dynamically recrystallised quartzite are classified as type I with a monoclinic symmetry and type II with an orthorhombic symmetry. Type I is related to simple shear-dominated deformation and type II to apparent constriction. These two fabric types are consistent with structural observation that a constrictive and coaxial deformation regime controlled the formation of non-cylindrical and refolded folds. In the metamorphic aureole, which produced essentially static annealing, CPO patterns intensify slightly and grain size increases towards the granodiorite until the temperature at which inversion from low- to high quartz is triggered. This inversion caused a volume increase and subsequent intergranular stresses activated slip systems fitting the temperature and water content. This study shows that annealing of dynamically recrystallised quartz crystals can activate previously inactive slip systems, reactivate slip systems and amplify older CPO fabrics. This conclusion identifies limits for the use of annealed quartz fabrics in reconstructing structural histories when earlier dynamic recrystallisation has occured.

Augenstein, Clemens; Burg, Jean-Pierre

2011-03-01

455

Metamorphic diamonds in a garnet megacryst from the Edough Massif (northeastern Algeria). Recognition and geodynamic consequences  

NASA Astrophysics Data System (ADS)

We report for the first time the discovery of diamond inclusions (5-30 ?m in size), identified by Raman spectroscopy and the characteristic sharp band at 1332 cm- 1 for crystalline diamond, in a garnet megacryst (? 5 cm) from the Edough Massif (NE Algeria). The garnet is adjacent to actinolite and ultramafic boudins and slices of marbles that are inserted within a major mylonite-ultramylonite band. This tectonic contact sharply delineates the Kef Lakhal oceanic unit from the granite-gneiss core below. The host garnet is almandine-dominant and is rich in exsolution of acicular rutile needles. Major and trace elements show a gradual but significant zonation from core to rim, and a sharp increase in grossular component in the rim. Trace element analyses of prismatic rutile inclusions up to 300 ?m in size indicate that the host metamorphic rock was a mafic protolith of MORB affinity. The Zr-in-rutile thermometry indicates a temperature range of 724-778 °C that we relate to rutile growth, either during prograde metamorphism or under peak UHP metamorphic conditions of ? 3.6 GPa that were reached during subduction of the UHP-rock precursors. We suggest that the mafic protolith originates from the subducted retreating Calabrian branch of the Tethyan slab, that broke or tore, and which fragments were dragged upward and thrust onto the North African margin along with the Kef Lakhal unit, shortly followed by formation of the Edough dome and opening of the Algerian basin.

Caby, Renaud; Bruguier, Olivier; Fernandez, Laure; Hammor, Dalila; Bosch, Delphine; Mechati, Mehdi; Laouar, Rabah; Ouabadi, Aziouz; Abdallah, Nachida; Douchet, Chantal

2014-12-01

456

Stratigraphy and radiolarians of upper cretaceous sedimentary cover of the Arakapas ophiolite massif (Cyprus)  

NASA Astrophysics Data System (ADS)

In the basal interval, sedimentary cover of the Arakapas ophiolite massif (southern Cyprus) is composed of metalliferous sediments of the Perapedhi Formation that is divided into three sequences based on diverse radiolarian assemblages. These are basal umbers of the Cenomanian age presumably (2-20 m), interlayering cherts and umbers of the Turonian-Coniacian (6-10 m), and opoka-like cherts of the Coniacian-Santonian. Higher in the succession, there are olistostrome deposits of the Moni Formation, which unconformably rest on the eroded underlying strata. In this formation also divisible into three sequences, the lower one 200 to 300 m thick is composed of variegated, presumably Campanian silty clays containing olistoliths of basic, presumably Upper Triassic volcanics, Lower Cretaceous sandstones, and opoka-like cherts and cherty limestones of the Albian-lower Cenomanian. Next sequence (100-200 m) is represented by alternation of variegated silty and green bentonitic clays of the Campaian, which enclose frequent olistoliths and horizons of fine-clastic olistostrome breccias. The upper sequence of upper Campanian-lower Maastrichtian bentonitic clays (50-100 m) contains interlayers of ash tuffs and clayey cherty sediments. Carbonate deposits of the upper Maastrichtian-Paleogene, conformably overlie the Moni Formation.

Bragina, L. G.; Bragin, N. Yu.

2006-10-01

457

Saldanha Massif, Mid-Atlantic Ridge: A Controlled Source EM Study  

NASA Astrophysics Data System (ADS)

In November-December 2004 a controlled source electromagnetic (CSEM) survey was carried out on the axis of the Mid-Atlantic Ridge during cruise Charles Darwin 167. The work is centred on a non-transform offset between the FAMOUS and AMAR segments, at 36 34' North. Here, a prominent feature is the Saldanha massif: a dome of unroofed mantle rocks, consisting largely of serpentised peridotites, and at whose summit significant low-temperature hydrothermal venting has been documented. Our objective is to determine the distribution of electrical resistivity and hence porosity over a volume of ~ 10 km x 10 km x 3 km vertically, in order to constrain the degree of penetration of seawater into the crust and uppermost mantle; to contrast the porosity structure here with volcanically hosted systems away from segment boundaries elsewhere on the MAR; and to constrain models of non-volcanic heat sources and hydrothermal circulation in ultramafic settings at slow spreading ridges. In addition to the CSEM survey we obtained swath bathymetry, gravity and magnetic data; water column physical properties and seafloor current data; and a number of dredge and gravity core samples. We shall present details of the data and samples, together with our preliminary analysis of the results.

Sinha, M. C.; Santos, F.; Dzhatieva, Z.; Dias, A.; Marques, A. F.; Silva, N.; de Nijs, I.

2005-12-01

458

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

459

Raman imaging of fluid inclusions in garnet from UHPM rocks (Kokchetav massif, Northern Kazakhstan).  

PubMed

Confocal Raman imaging of fluid inclusions in garnet porphyroblasts from diamond-grade metamorphic calc-silicate rocks from the Kumdy-Kol microdiamond deposit (Kokchetav Massif, Northern Kazakhstan) reveals that these fluid inclusions consist of almost pure water with different step-daughter phases (e.g., calcite, mica and rare quartz). These fluid inclusions are characterized by negative crystal shape of the host-garnet and they exclusively occur within the core of garnet porphyroblasts. These observations are consistent with their primary origin, most likely at ultrahigh-pressure (UHP) metamorphic conditions. The euhedral newly formed garnet, different in color and composition, was found to be associated with these fluid inclusions. It is proposed that newly formed garnet and water fluid inclusions appear by reaction between the hydrous fluid and the garnet-host. These fluid inclusions provide an unequivocal record of almost pure H(2)O fluids, indicating water-saturated conditions within subducted continental crust during prograde stage and/or ultrahigh-P metamorphism. PMID:21377920

Korsakov, Andrey V; Dieing, Thomas; Golovin, Aleksandr V; Toporski, Jan

2011-10-01

460

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

461

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

462

Boiling fluids in a region of rapid uplift, Nanga Parbat Massif, Pakistan  

NASA Astrophysics Data System (ADS)

The Nanga Parbat massif of northern Pakistan is currently undergoing rapid uplift (approx. 5-10 mm/a), resulting in near-surface elevated temperatures. Numerous quartz veins cut geologically young structures (less than 2 Ma), attesting to widespread young fluid flow. Fluid inclusions in quartz veins are predominantly low density water vapor (down to 0.05 mg/cu m), with some low density carbon dioxide vapor, and the fluid is predominantly meteoric in origin. Fluid inclusions provide evidence for boiling near to the critical points for water and for 5 wt% NaCl solution (up to 410 C). Head-driven meteoric water was convecting in fracture permeability under hydrostatic pressures which followed the boiling point-depth curve and near-boiling springs emanate from the surface. Hydrostatic pressures persisted to depths of about 6 km below the topographic surface, or near to sea level, where the brittle-ductile transition is inferred to lie. Numerical modeling of conductive heat flow in an area of high relief during rapid uplift indicates that the shape of the near-surface conductive geotherm is significantly influenced by topographic relief. Reasonable approximations for topgraphy at Nanga Parbat produce a conductive geotherm which implies high, near-surface geothermal gradients (greater than 100 C/km, and the isotherms describe a giant pillar of heat. Above about 4 km, fluid temperature is greater than conductive rock temperature in permeable zones which carry convecting boiling meteoric fluid.

Craw, D.; Koons, P. O.; Winslow, D.; Chamberlain, C. P.; Zeitler, P.

1994-12-01

463

A large and complete Jurassic geothermal field at Claudia, Deseado Massif, Santa Cruz, Argentina  

NASA Astrophysics Data System (ADS)

Late Jurassic geothermal deposits at Claudia, Argentinean Patagonia, are among the largest (40 km2) and most varied in the Deseado Massif, a 60,000 km2 volcanic province hosting precious metals (Au, Ag) mineralization generated during diffuse back arc spreading and opening of the South Atlantic Ocean. Both siliceous sinter and travertine occur in the same stratigraphic sequence. Deposits range from those interpreted as fluvially reworked hydrothermal silica gels, to extensive apron terraces, to a clustering of high-temperature subaerial vent mounds. Paleoenvironmentally diagnostic textures of sinters include wavy laminated, bubble mat and nodular fabrics, and for travertines comprise fossil terracette rims, wavy laminated, bubble mat, spherulitic, oncoidal, and peloidal fabrics. Of special note is the presence of relatively large (to 25 cm high), inferred subaqueous "Conophyton" structures in travertines, which serve as analogs for some Precambrian stromatolites and imply the presence of relatively deep pools maintained by voluminous spring discharges. The Claudia geothermal field is geographically and geologically linked to the Cerro Vanguardia epithermal project (total resource of ~ 7.8 million ounces Au equivalent) via proximity, similar veins, and structural linkages, making it an especially large and relevant prospect for the region. The combined Claudia-Cerro Vanguardia hydrothermal system likely represents a fortuitous alignment of focused fluid flow and structure conducive to forming a giant epithermal ore deposit, with respect to size, ore concentration and potentially duration, in the Late Jurassic of Patagonia.

Guido, Diego M.; Campbell, Kathleen A.

2014-04-01

464

40 CFR 81.62 - Northeast Mississippi Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2011 CFR

...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...

2011-07-01

465

40 CFR 81.62 - Northeast Mississippi Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2010 CFR

...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...

2010-07-01

466

78 FR 10136 - Magnuson-Stevens Act Provisions; Fisheries of the Northeastern United States; Northeast...  

Federal Register 2010, 2011, 2012, 2013

...Northeast Multispecies Fishery; Approved Monitoring Service Providers AGENCY: National...Commerce. ACTION: Notice, approved monitoring service providers...to provide dockside and/or at-sea monitoring services to Northeast (NE)...

2013-02-13

467

75 FR 3434 - Fisheries of the Northeastern United States; Northeast Skate Complex Fishery; Amendment 3  

Federal Register 2010, 2011, 2012, 2013

...Northeast Skate Complex Fishery; Amendment 3 AGENCY: National Marine Fisheries Service...regulations to implement measures in Amendment 3 to the Northeast Skate Complex Fishery Management Plan (Skate FMP). Amendment 3 was developed by the New England...

2010-01-21

468

40 CFR 81.62 - Northeast Mississippi Intrastate Air Quality Control Region.  

...2014-07-01 false Northeast Mississippi Intrastate Air Quality Control Region...Control Regions § 81.62 Northeast Mississippi Intrastate Air Quality Control Region. The Alabama-Mississippi-Tennessee Interstate Air...

2014-07-01

469

40 CFR 81.62 - Northeast Mississippi Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Northeast Mississippi Intrastate Air Quality Control Region...Control Regions § 81.62 Northeast Mississippi Intrastate Air Quality Control Region. The Alabama-Mississippi-Tennessee Interstate Air...

2013-07-01

470

40 CFR 81.62 - Northeast Mississippi Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Northeast Mississippi Intrastate Air Quality Control Region...Control Regions § 81.62 Northeast Mississippi Intrastate Air Quality Control Region. The Alabama-Mississippi-Tennessee Interstate Air...

2012-07-01

471

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

472

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

473

1. Northeast face of missile site control building, commonly known ...  

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

1. Northeast face of missile site control building, commonly known as the missile site radar building, showing open blast door #BD2. This emergency escape, at stair no. 12, is NEMP/RFI-shielded and 16" thick. The large circle in the center is the radar face, also known as the antennae array aperture. The small circle to the right of the radar face is the "Q" channel. The antennae atop the turret provided lightning protection for the building - Stanley R. Mickelsen Safeguard Complex, Missile Site Control Building, Northeast of Tactical Road; southeast of Tactical Road South, Nekoma, Cavalier County, ND

474

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

475

Integrated modelling of water availability and water use in the semi-arid Northeast of Brazil  

E-print Network

Integrated modelling of water availability and water use in the semi-arid Northeast of Brazil A: Bronstert 1 Integrated modelling of water availability and water use in the semi-arid Northeast of Brazil A con- straint for development in the semi-arid Northeast of Brazil. Quanti cation of natural water

Bronstert, Axel

476

A common garden experiment with larval Northeast Arctic and Norwegian coastal cod cohorts in replicated mesocosms  

E-print Network

A common garden experiment with larval Northeast Arctic and Norwegian coastal cod cohorts differential effects of feeding conditions for larval Northeast Arctic (NA) cod and Norwegian coastal (NC) cod (Laurence et al., 1981). Norwegian coastal (NC) cod and Northeast Arctic (NA) cod are among the two most

Heino, Mikko

477

Datation U Pb à la microsonde ionique des zircons de l'unité supérieure de gneiss dans le Sud Limousin, Massif centralIonic microprobe dating of zircons from the Upper Gneiss Unit (South Limousin, Massif Central, France)  

NASA Astrophysics Data System (ADS)

The Vergonzac leptynites in the Tulle anticline (South Limousin, West Massif Central) belong to the Upper Gneiss unit. The emplacement age of their protolith was obtained by U-Pb ion-probe dating on selected zircons with CAMECA IMS 1270. This age is 525±12 Ma, and is the same as the Mulatet orthogneiss and the Tulle Augen-gneiss, which belong to the Lower Gneiss unit. This might imply that the protoliths of these two units were emplaced in the same geotectonic domain.

Alexandrov, Pavel; Floc'h, Jean-Pierre; Cuney, Michel; Cheilletz, Alain

2001-05-01

478

Mineral-deposit models for northeast Asia, Chapter 3 in Metallogenesis and tectonics of northeast Asia  

USGS Publications Warehouse

The major purposes of this chapter are to provide (1) an overview of the regional geology, tectonics, and metallogenesis of Northeast Asia for readers who are unfamiliar with the region, (2) a general scientific introduction to the succeeding chapters of this volume, and (3) an overview of the methodology of metallogenic and tectonic analysis used in this study. We also describe how a high-quality metallogenic and tectonic analysis, including construction of an associated metallogenic-tectonic model will greatly benefit other mineral resource studies, including synthesis of mineral-deposit models; improve prediction of undiscovered mineral deposit as part of a quantitative mineral-resource-assessment studies; assist land-use and mineral-exploration planning; improve interpretations of the origins of host rocks, mineral deposits, and metallogenic belts, and suggest new research. Research on the metallogenesis and tectonics of such major regions as Northeast Asia (eastern Russia, Mongolia, northern China, South Korea, and Japan) and the Circum-North Pacific (the Russian Far East, Alaska, and the Canadian Cordillera) requires a complex methodology including (1) definitions of key terms, (2) compilation of a regional geologic base map that can be interpreted according to modern tectonic concepts and definitions, (3) compilation of a mineral-deposit database that enables a determination of mineral-deposit models and clarification of the relations of deposits to host rocks and tectonic origins, (4) synthesis of a series of mineral-deposit models that characterize the known mineral deposits and inferred undiscovered deposits in the region, (5) compilation of a series of metallogenic-belt belts constructed on the regional geologic base map, and (6) construction of a unified metallogenic and tectonic model. The summary of regional geology and metallogenesis presented here is based on publications of the major international collaborative studies of the metallogenesis and tectonics of Northeast Asia that have been led by the U.S. Geological Survey (USGS). These studies have produced two broad types of publications (1) a series of regional geologic, mineral-deposit, and metallogenic-belt maps, with companion descriptions of the region, and (2) a suite of metallogenic and tectonic analyses of the same region. The study area consists of eastern Russia (most of eastern Siberia and the Russian Far East), Mongolia, northern China, South Korea, Japan, and adjacent offshore areas. The major cooperative agencies are the Russian Academy of Sciences; the Academy of Sciences of the Sakha Republic (Yakutia); VNIIOkeangeologia and Ministry of Natural Resources of the Russian Federation; the Mongolian Academy of Sciences; the Mongolian University of Science and Technology; the Mongolian National University; Jilin University, Changchun, People?s Republic of China, the China Geological Survey; the Korea Institute of Geosciences and Mineral Resources; the Geological Survey of Japan/AIST; the University of Texas, Arlington, and the U.S. Geological Survey (USGS). This study builds on and extends the data and interpretations from a previous project on the Major Mineral Deposits, Metallogenesis, and Tectonics of the Russian Far East, Alaska, and the Canadian Cordillera conducted by the USGS, the Russian Academy of Sciences, the Alaska Division of Geological and Geophysical Surveys, and the Geological Survey of Canada. The major products of this project were summarized by Naumova and others (2006) and are described in appendix A.

Obolenskiy, Alexander A.; Rodionov, Sergei M.; Ariunbileg, Sodov; Dejidmaa, Gunchin; Distanov, Elimir G.; Dorjgotov, Dangindorjiin; Gerel, Ochir; Hwang, Duk-Hwan; Sun, Fengyue; Gotovsuren, Ayurzana; Letunov, Sergei N.; Li, Xujun; Nokleberg, Warren J.; Ogasawara, Masatsugu; Seminsky, Zhan V.; Smelov, Akexander P.; Sotnikov, Vitaly I.; Spiridonov, Alexander A.; Zorina, Lydia V.; Yan, Hongquan

2010-01-01

479

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

480

14. View of Park Avenue to northeast across the San ...  

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

14. View of Park Avenue to northeast across the San Francisco River. From left to right can be seen AZ-191 (Clifton Mineral Hot Springs Bath House), AZ-192 (Milk Depot) and AZ-193 (Presbyterian Church). - Clifton Townsite, Confluence of Chase Creek & San Francisco River, Clifton, Greenlee County, AZ

481

REGIONAL SUSCEPTIBILITY OF NORTHEAST LAKES TO ZEBRA MUSSEL INVASION  

EPA Science Inventory

The rapid spread of the exotic zebra mussel (Dreissena polymorpha) concerns aquatic resource managers in the United States and Canada. ince 1990 it has been spreading from the Great Lakes into the Northeast. he primary goal of this study is to provide lake resource managers in th...

482

Educational Research in North-East India: A Source Material.  

ERIC Educational Resources Information Center

The Northeast region of India has a distinct geophysical structure and concomitant socio-economic development. New educational development initiatives for Northeastern states include bridging gaps in basic minimum services, enhancing teachers training facilities, and preparing state specific holistic plans. This annotated bibliography represents…

Malhotra, Nirmal; Mittal, Pratibha

483

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

484

3. DETAIL OF NORTHEAST CORNER; OPENING AT TOP WAS INTAKE ...  

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

3. DETAIL OF NORTHEAST CORNER; OPENING AT TOP WAS INTAKE FOR CATTLE; CANTILEVERED HOG RUN (BUILDING 147) OBSCURES A PORTION OF THE BEEF KILL'S ORIGINAL GLASS BLOCK WALLS - Rath Packing Company, Beef Killing Building, Sycamore Street between Elm & Eighteenth Streets, Waterloo, Black Hawk County, IA

485

PASTURE ASSESSMENT IN THE NORTHEAST U.S.  

Technology Transfer Automated Retrieval System (TEKTRAN)

Many livestock producers have intensified management and use of pastures in the northeast. These producers need assessment and monitoring tools to determine how management has influenced pastures. The Pasture Condition Score (PCS) system, developed by the NRCS, was used to assess 108 pastures on 31 ...

486

Perspective view from northeast of former Surgeon's Quarters. This duplex ...  

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

Perspective view from northeast of former Surgeon's Quarters. This duplex structure also housed the Secretary and was built in 1887. It is attributed to architect Henry C. Koch, due to the similarity between this Shingle Style house and his contemporary design for the Soldiers' Home Chapel. - National Home for Disabled Volunteer Soldiers, Northwestern Branch, Surgeon's Quarters, 5000 West National Avenue, Milwaukee, Milwaukee County, WI

487

24. VIEW TO NORTHEAST FROM BRIDGE HOUSE. SOUTH SWING SPAN ...  

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

24. VIEW TO NORTHEAST FROM BRIDGE HOUSE. SOUTH SWING SPAN (SEEN AS THE ROADWAY IN FOREGROUND) HAS CLOSED, NORTH SWING SPAN IS APPROACHING CLOSURE. - George P. Coleman Memorial Bridge, Spanning York River at U.S. Route 17, Yorktown, York County, VA

488

11. View of Tombigbee River Bridge facing northeast along center ...  

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

11. View of Tombigbee River Bridge facing northeast along center of roadway. North pony span is in background center and new bridge is partially shown in background left. Barrels shown are remnants of traffic control devices used for one lane traffic due to reduced weight capacity of bridge before closure. - Tombigbee River Bridge, Spanning Tombigbee River at State Highway 182, Columbus, Lowndes County, MS

489

REAR VIEW OF THE HOUSE FROM THE NORTHEAST SIDE ...  

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

REAR VIEW OF THE HOUSE FROM THE NORTHEAST SIDE - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, U-Shaped Two-Bedroom Single-Family Type 6, Birch Circle, Elm Drive, Elm Circle, and Date Drive, Pearl City, Honolulu County, HI

490

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

491

12. A view taken from the southwest bank looking northeast. ...  

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

12. A view taken from the southwest bank looking northeast. This medium close-up image of the west facade of the bridge reveals a vertical fault which has developed through the abutment and the balustrade. - Vigo County Bridge No. 139, Spanning Sugar Creek at Seventy-fourth Place, Terre Haute, Vigo County, IN

492

20. AERIAL VIEW TO NORTHEAST OF NORTH PART OF COAST ...  

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

20. AERIAL VIEW TO NORTHEAST OF NORTH PART OF COAST GUARD AIR STATION SAN FRANCISCO. 30X20 inch black and white silver gelatin print. Photographers unknown. Date unknown. - U.S. Coast Guard Air Station San Francisco, Warehouse, 1020 North Access Road, San Francisco, San Francisco County, CA

493

15. NORTHEAST CORNER, SOLDIER FIELD, LOOKING SOUTHEAST TOWARD THE GYMNASIUM, ...  

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

15. NORTHEAST CORNER, SOLDIER FIELD, LOOKING SOUTHEAST TOWARD THE GYMNASIUM, SHOWING EAST DITCH AND A SECTION OF LOW WALL. No date, probably ca. 1935. Photographer unknown. Original silver gelatin print measures 13.1 cm by 7.3 cm, flush mounted on mat board. - Presidio of Monterey, Soldier Field, Monterey, Monterey County, CA

494

5. AERIAL VIEW TO NORTHEAST OF ENTIRE COAST GUARD AIR ...  

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

5. AERIAL VIEW TO NORTHEAST OF ENTIRE COAST GUARD AIR STATION SAN FRANCISCO. 8X10 black and white silver gelatin print. United States Coast Guard Official Photograph, 12th Coast Guard District, San Francisco. 1960. - U.S. Coast Guard Air Station San Francisco, 1020 North Access Road, San Francisco, San Francisco County, CA

495

49. VIEW LOOKING NORTHEAST AT EXCITER GENERATOR "c" LOCATED UNDER ...  

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

49. VIEW LOOKING NORTHEAST AT EXCITER GENERATOR "c" LOCATED UNDER CONTROL ROOM ON SOUTH SIDE OF TURBINE HALL. THE EXCITER GENERATORS PROVIDED DIRECT CURRENT TO THE FIELD COILS OF THE MAIN GENERATORS. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

496

GENERAL VIEW LOOKING NORTHEAST FROM ATOP A STORAGE TANK, LOOKING ...  

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

GENERAL VIEW LOOKING NORTHEAST FROM ATOP A STORAGE TANK, LOOKING AT THE CATALYZER BUILDINGS. NOTE CIRCULAR FOUNDATION FOR AMMONIA STORAGE TANK AND THE LIQUID AIR BUILDING IN THE UPPPER RIGHT CORNER OF PHOTO. - United States Nitrate Plant No. 2, Reservation Road, Muscle Shoals, Muscle Shoals, Colbert County, AL

497

VIEW LOOKING NORTHEAST SHOWING THE TRASH GRATE THAT REPLACED THE ...  

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

VIEW LOOKING NORTHEAST SHOWING THE TRASH GRATE THAT REPLACED THE LOCK GATES TO LOCK 71 WHEN THE FLIGHT OF FIVE WAS CONVERTED TO A SPILLWAY AFTER THE LARGER LOCKS, 34 AND 35, WERE PUT INTO OPERATION. THE SHOVEL TRUCK IN THE VIEW IS USED TO CLEAR DEBRIS. - New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport, Niagara County, NY

498

VIEW LOOKING NORTHEAST INTO LOCK 71. NOTE THE SEDIMENT BUILD ...  

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

VIEW LOOKING NORTHEAST INTO LOCK 71. NOTE THE SEDIMENT BUILD UP. THIS IS BY DESIGN, NOT ONLY ARE THE OLDER LOCKS USED AS AN OVERFLOW SPILLWAY FOR THE CURRENT LOCKS, THEY ARE ALSO USED FOR SEDIMENT AND DEBRIS CONTROL. - New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport, Niagara County, NY

499

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

500

82. VIEW OF AIRCONDITIONING CONTROLS LOCATED IN NORTHEAST CORNER OF ...  

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

82. VIEW OF AIR-CONDITIONING CONTROLS LOCATED IN NORTHEAST CORNER OF SLC-3E CONTROL ROOM. DIAL ON RIGHT (EAST) PERPENDICULAR WALL IS DIMMER FOR ROOM LIGHTING. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA