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Page 3625, results 90601 - 90625

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Not all publications have extents, not all extents are completely accurate
Extensional reactivation of the Chocolate Mountains subduction thrust in the Gavilan Hills of southeastern California
F.R. Oyarzabal, C.E. Jacobson, Gordon B. Haxel
1997, Tectonics (16) 650-661
The NE vergent Chocolate Mountains fault of south-eastern California has been interpreted as either a subduction thrust responsible for burial and prograde metamorphism of the ensimatic Orocopia Schist or as a normal fault involved in the exhumation of the schist. Our detailed structural analysis in the Gavilan Hills area provides...
Multiscale sampling of plant diversity: Effects of minimum mapping unit size
Thomas J. Stohlgren, Geneva W. Chong, M. A. Kalkhan, L. D. Schell
1997, Ecological Applications (7) 1064-1074
Only a small portion of any landscape can be sampled for vascular plant diversity because of constraints of cost (salaries, travel time between sites, etc.). Often, the investigator decides to reduce the cost of creating a vegetation map by increasing the minimum mapping unit (MMU), and/or by reducing the number...
World Wide Web home page for the South Platte NAWQA
Sharon L. Qi, Kevin F. Dennehy
1997, Fact Sheet 242-96
A World Wide Web home page for the U.S. Geological Survey's (USGS) National Water-Quality Assessment (NAWQA) Program, South Platte River Basin study is now online. The home page includes information about the basinwide investigation and provides viewing and downloading access to physical, chemical, and biological data collected by the study...
Hydrogeology and potential for ground-water development, carbonate-rock aquifers, southern Nevada and southeastern California
T. J. Burbey
1997, Water-Resources Investigations Report 95-4168
Seventeen hydrographic areas in southern Nevada were assessed for the ground-water development potential of the underlying carbonate-rock aquifers on the basis of geologic and hydrologic information developed as part of the Nevada Carbonate Aquifers Study and information compiled from previous investigations. All selected areas lie within a miogeoclinal belt where...
Paleomagnetic and 40Ar/39Ar geochronologic data from late Proterozoic mafic dikes and sills, Montana and Wyoming
Stephen S. Harlan, John William Geissman, Lawrence W. Snee
1997, Professional Paper 1580
Paleomagnetic and 40Ar/39Ar results from mafic dikes and sills in northwestern Wyoming and western Montana yield similar virtual geomagnetic poles and isotopic dates. In combination with paleomagnetic and geochronologic data from elsewhere in the western Cordillera, these data provide evidence for a regional mafic magnetic event at 780 to 770...
619 ecosystem management projects
Thomas R. Stanley, Joel T. Heinen, James R. Strittholt, Philip M. Fearnside, Gillian Cooper-Driver
1997, Conservation Biology (11) 1037-1041
No abstract available....
Metamorphic and structural evidence for significant vertical displacement along the Ross Lake fault zone, a major orogen-parallel shear zone in the Cordillera of western North America
J. A. Baldwin, D.L. Whitney, H. A. Hurlow
1997, Tectonics (16) 662-681
Results of an investigation of the petrology and structure of the Skymo complex and adjacent terranes constrain the amount, timing, and sense of motion on a segment of the > 600-km-long Late Cretaceous - early Tertiary Ross Lake fault zone (RLFZ), a major orogen-parallel shear zone in the Cordillera of...
Delineation of ground-water basins and recharge areas for municipal water-supply springs in a karst aquifer system in the Elizabethtown area, northern Kentucky
C.J. Taylor
1997, Water-Resources Investigations Report 96-4254
Ground-water basins and recharge areas for municipal water-supply springs for the Elizabethtown area, northern Kentucky, were delineated using a hydrogeologic-mapping approach, potentiometric map interpretation, anddye-tracing tests. Five distinct ground-water basins drained by major karst springs are present in the Elizabethtown area. These basins are composed of...
Concentrations of platinum group elements in 122 U.S. coal samples
C.L. Oman, R. B. Finkelman, S.J. Tewalt
1997, Open-File Report 97-53
Analysis of more than 13,000 coal samples by semi-quantitative optical emission spectroscopy (OES) indicates that concentrations of the platinum group elements (iridium, palladium, platinum, osmium, rhodium, and ruthenium) are less than 1 ppm in the ash, the limit of detection for this method of analysis. In order to accurately determine...
Determining concentrations of 2-bromoallyl alcohol and dibromopropene in ground water using quantitative methods
Sandra Y. Panshin
1997, Open-File Report 97-43
A method for determining levels of 2-bromoallyl alcohol and 2,3-dibromopropene from ground-water samples using liquid/liquid extraction followed by gas chromatography/mass spectrometry is described. Analytes were extracted from the water using three aliquots of dichloromethane. The aliquots were combined and reduced in volume by rotary evaporation followed by evaporation using a...