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The Mound Spring quadrangle, the southwestern-most 7.5'quadrangle of the area of the Las Vegas 1:100,000-scalequadrangle, is entirely within the Pahrump Valley, spanning theNevada/California State line. New geologic mapping of thepredominantly Quaternary materials is combined with new studiesof gravity and geochronology in this quadrangle. Elevenpredominantly fine-grained units are delineated, including playasediment, dune sand, and deposits associated with several cyclesof past groundwater discharge and distal fan sedimentation.These units are intercalated with 5 predominantly coarse-grainedalluvial-fan and wash gravel units mainly derived from the SpringMountains. The gravel units are distinguished on the basis...
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The drilling project at Owens Lake commenced in April,1991. This Open-File Report represents an effort to makeavailable to other researchers our preliminary datacollected during the first year of study followingcompletion of the core-drilling phase. Nineteen datacollections and preliminary interpretations are presentedin the following sections. They are the work of fifteenfirst-authors and their numerous co-authors. Broadly,their topics include a field log of the core(1 contribution), sedimentological analyses (1), clay-mineral identification (1), geochemical analyses (5),dating and age estimates of the cored sediments (4), andidentifications of fossil materials (7).
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An isostatic gravity map of the Death Valley groundwater model area was prepared from over 40,0000 gravity stations as part of an interagency effort by the U.S. Geological Survey and the U.S. Department of Energy to help characterize the geology and hydrology of southwest Nevada and parts of California.
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A depth to basement map of the Death Valley groundwater model area was prepared using over 40,0000 gravity stations as part of an interagency effort by the U.S. Geological Survey and the U.S. Department of Energy to help characterize the geology and hydrology of southwest Nevada and parts of California.
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Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. This dataset presents latitude, longitude, altitude, and magnetic-field values.
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An aeromagnetic map of the Death Valley groundwater model area was prepared from published aeromagnetic surveys as part of an interagency effort by the U.S. Geological Survey and the U.S. Department of Energy to help characterize the geology and hydrology of southwest Nevada and parts of California.
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This geologic map database is a bedrock compilation of the Beatty30'x 60' quadrangle in southern Nevada and adjoining parts ofCalifornia. The database represents a new compilation at1:100,000-scale of the southern part of the southwestern Nevadavolcanic field and Paleozoic and late Precambrian sedimentary rocksin Bare Mountain and the Funeral Mountains. The map area includesthe entire region around Yucca Mountain, the proposed nationalhigh-level nuclear waste repository, and the eastern part of DeathValley National Park. A major epithermal disseminated gold depositis being mined at Ladd Mountain, in the southeastern BullfrogHills, and the geology of numerous other areas of mineralization inthe Bullfrog Hills and...
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This digital geologic and tectonic database of the Death Valley ground-water model area, as well as its accompanying geophysical maps, are compiled at 1:250,000 scale. The map compilation presents new polygon, line, and point vector data for the Death Valley region. The map area is enclosed within a 3 degree X 3 degree area along the border of southern Nevada and southeastern California. In addition to the Death Valley National Park and Death Valley-Furnace Creek fault systems, the map area includes the Nevada Test Site, the southwest Nevada volcanic field, the southern end of the Walker Lane (from southern Esmeralda County, Nevada, to the Las Vegas Valley shear zone and Stateline fault system in Clark County, Nevada),...
Tags: 06027 = Inyo, 06071 = San Bernardino, 32003 = Clark, 32009 = Esmeralda, 32017 = Lincoln, All tags...
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Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. This dataset presents latitude, longitude, altitude, and magnetic-field values.
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This digital geologic map of the Nevada Test Site (NTS) and vicinity, as well as its accompanying digital geophysical maps, are compiled at 1:100,000 scale. The map compilation presents new polygon (geologic map unit contacts), line (fault, fold axis, metamorphic isograd, dike, and caldera wall) and point (structural attitude) vector data for the NTS and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California. The map area covers two 30 x 60-minute quadrangles-the Pahute Mesa quadrangle to the north and the Beatty quadrangle to the south-plus a strip of 7.5-minute quadrangles on the east side-72 quadrangles in all. In addition to the NTS, the map area includes the rest of the southwest Nevada...
Tags: 06027 = Inyo, 32003 = Clark, 32017 = Lincoln, 32023 = Nye, Amargosa Desert, All tags...
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The locations of principal faults and structural zones that may influence ground-water flow were compiled in support of a three-dimensional ground-water model for the Death Valley regional flow system (DVRFS), which covers 80,000 square km in southwestern Nevada and southeastern California. Faults include Neogene extensional and strike-slip faults and pre-Tertiary thrust faults. Emphasis was given to characteristics of faults and deformed zones that may have a high potential for influencing hydraulic conductivity. These include: (1) faulting that results in the juxtaposition of stratigraphic units with contrasting hydrologic properties, which may cause ground-water discharge and other perturbations in the flow system;...
Tags: 06027 = Inyo, 06029 = Kern, 06071 = San Bernardino, 32003 = Clark, 32009 = Esmeralda, All tags...
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Dust samples taken annually for five years from 55 sites insouthern Nevada and California provide an unparalleled sourceof information on modern rates of dust deposition, grain size,and mineralogical and chemical composition. The relations ofmodern dust to climatic factors, type and lithology of dustsource, and regional wind patterns shed new light on theprocesses of dust entrainment and deposition.A project to study modern dust deposition relative to soils insouthern Nevada and California was initiated in 1984 under theauspices of the Yucca Mountain Site Characterization Project(Interagency Agreement DE-AI08-78ET44802). The primary purposeof the dust-deposition project was to provide data on moderndust composition...
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This digital geologic and tectonic database of the Death Valley ground-water model area, as well as its accompanying geophysical maps, are compiled at 1:250,000 scale. The map compilation presents new polygon, line, and point vector data for the Death Valley region. The map area is enclosed within a 3 degree X 3 degree area along the border of southern Nevada and southeastern California. In addition to the Death Valley National Park and Death Valley-Furnace Creek fault systems, the map area includes the Nevada Test Site, the southwest Nevada volcanic field, the southern end of the Walker Lane (from southern Esmeralda County, Nevada, to the Las Vegas Valley shear zone and Stateline fault system in Clark County, Nevada),...
Tags: 06027 = Inyo, 06071 = San Bernardino, 32003 = Clark, 32009 = Esmeralda, 32017 = Lincoln, All tags...
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Eolian dust constitutes most of the pedogenic material in latePleistocene and Holocene soils of many arid regions. Comparison ofthe compositions and influx rates of modern dust with the eoliancomponent of dated soils at 24 sites in southern Nevada andCalifornia yields information on: (1) the composition and influxrate of dust in late Pleistocene and Holocene soils, (2) paleoclimateand its effects on the genesis of aridic soils, especially withregard to "dust events", (3) the timing and relative contribution ofdust from playa sources versus alluvial sources, and (4) the effectsof accumulation of fines in soil horizons. The A and B horizons ofsoils formed on gravelly alluvial-fan deposits in the study area aresimilar...


    map background search result map search result map Aeromagnetic data for Lathrop Wells, Nevada Survey Part 2 of 3 Aeromagnetic data for Inyo Extension, California Geologic Map of the Mound Spring Quadrangle, Nye and ClarkCounties, Nevada, and Inyo County, California Hydrostructural Maps of the Death Valley Regional Flow System, Nevada and California--Map A: Structural Framework, Neogene Basins, and Potentiometric Surface; Map B: Structural Framework, Earthquake Epicenters, and Potential Zones of Enhanced Hydraulic Conductivity Geologic Map of the Death Valley Ground-Water Model Area, Nevada and California Tectonic Map of the Death Valley Ground-Water Model Area, Nevada and California Isostatic Gravity Map of the Death Valley Ground-Water Model Area, Nevada and California Aeromagnetic Map of the Death Valley Ground-Water Model Area, Nevada and California Map Showing Depth to Pre-Cenozoic Basement in the Death Valley Ground-Water Model Area, Nevada and California Core OL-92 from Owens Lake, southeast California Digital Bedrock Geologic Map Database of the Beatty 30 X 60-Minute Quadrangle, Nevada and California Digital Geologic Map of the Nevada Test Site and Vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California Dust Deposition in Southern Nevada and California, 1984-1989: Relations to climate, source area, and lithology Quaternary Soils and Dust Deposition in Southern Nevada and California Geologic Map of the Mound Spring Quadrangle, Nye and ClarkCounties, Nevada, and Inyo County, California Aeromagnetic data for Lathrop Wells, Nevada Survey Part 2 of 3 Aeromagnetic data for Inyo Extension, California Digital Bedrock Geologic Map Database of the Beatty 30 X 60-Minute Quadrangle, Nevada and California Digital Geologic Map of the Nevada Test Site and Vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California Hydrostructural Maps of the Death Valley Regional Flow System, Nevada and California--Map A: Structural Framework, Neogene Basins, and Potentiometric Surface; Map B: Structural Framework, Earthquake Epicenters, and Potential Zones of Enhanced Hydraulic Conductivity Geologic Map of the Death Valley Ground-Water Model Area, Nevada and California Tectonic Map of the Death Valley Ground-Water Model Area, Nevada and California Isostatic Gravity Map of the Death Valley Ground-Water Model Area, Nevada and California Aeromagnetic Map of the Death Valley Ground-Water Model Area, Nevada and California Map Showing Depth to Pre-Cenozoic Basement in the Death Valley Ground-Water Model Area, Nevada and California Quaternary Soils and Dust Deposition in Southern Nevada and California Dust Deposition in Southern Nevada and California, 1984-1989: Relations to climate, source area, and lithology