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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.
Environmental assessment overview: Yucca Mountain Site, Nevada Research and Development Area, Nevada
In February 1983, the U.S. Department of Energy (DOE) identified the Yucca Mountain site in Nevada as one of nine potentially acceptable sites for a mined geologic repository for spent nuclear fuel and high-level radioactive waste. The site is in the Great Basin, which is one of five distinct geohydrologic settings considered for the first repository. To determine their suitability, the Yucca Mountain site and the eight other potentially acceptable sites have been evaluated in accordance with the DOE'S General Guidelines for the Recommendation of Sites for the Nuclear Waste Repositories. These evaluations were reported in draft environmental assessments (EAs), which were issued for public review and comment. After...
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...
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;...
This data release consists of four directories: GroundwaterWithdrawals, Precipitation, WaterLevelDatabase, and WLMs. The GroundwaterWithdrawals directory contains a Microsoft Excel workbook with groundwater withdrawal data from 1996-2015 for water-supply wells in Beatty and Bullfrog Hills, Nye County, Nevada. The Precipitation directory contains four Microsoft Excel workbooks with data from precipitation stations and analyses used to construct long-term precipitation index records. The WaterLevelDatabase directory contains a Microsoft Excel workbook with hydrographs and well information for the 79 wells analyzed in the larger work. The WLMs directory contains 11 water-level models that were used to determine hydrologic...
Yucca Mountain, Nye County, Nevada, has been identified as apotential site for underground storage of high-levelradioactive waste. This geologic map compilation, includingall of Yucca Mountain and Crater Flat, most of the CalicoHills, western Jackass Flats, Little Skull Mountain, theStriped Hills, the Skeleton Hills, and the northeasternAmargosa Desert, portrays the geologic framework for asaturated-zone hydrologic flow model of the Yucca Mountainsite. Key geologic features shown on the geologic map andaccompanying cross sections include: (1) exposures ofProterozoic through Devonian strata inferred to have beendeformed by regional thrust faulting and folding, in theSkeleton Hills, Striped Hills, and Amargosa Desert...
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...
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