Three-Dimensional Hydrogeologic Framework Model for Use With a Steady-State Numerical Ground-Water Flow Model of the Death Valley Regional Flow System, Nevada and CaliforniaDIANE Publishing |
عبارات ومصطلحات مألوفة
30 degrees 40 80 KILOMETERS 80 MILES Figure aquifer Area model grid boundary Nevada Test Cactus Range clastic confining unit clastic rocks construct gridded surface D'Agnese data Death Valley Data sources Death Valley Regional degrees above horizon Department of Energy Digital Elevation Model faults Flow System model geologic model Grose and Smith Ground-Water Flow Model horizon 0 40 Hydrogeologic Framework Model illumination from northwest KILOMETERS 0 40 LCCU lower carbonate aquifer lower clastic confining model boundary Nevada model grid data NEVADA CALIFORNIA 35 Nevada Test Site northwest at 30 Numerical Ground-Water Flow Pahranagat Range Pahute Mesa Panamint Range pCgm Phase I geologic Regional Flow System Shaded-relief base Steady-State Numerical Ground-Water sun illumination System model boundary Test Area model Test Site boundary Three-Dimensional Hydrogeologic Framework Transverse Mercator projection U.S. Geological Survey UGTA Phase Underground Test Area Universal Transverse Mercator Valley Regional Flow volcanic rocks Yucca Mountain Zone 11
مقاطع مشهورة
الصفحة ii - The use of firm, trade, and brand names in this report is for identification purposes only and does not constitute endorsement by the US Geological Survey For additional information write to: District Chief US Geological Survey 333 W.
الصفحة 2 - Defense activities through its bureaus, including the US Fish and Wildlife Service, the Bureau of Land Management, and the National Park Service.
الصفحة 4 - The study area has a semi-arid to arid climate and is located within the southern Great Basin, a subprovince of the Basin and Range physiographic province.
الصفحة 7 - In contrast to earlier compressional tectonism, regional uplift, erosion, volcanism, and extension occurred in the Tertiary. As a result, the Death Valley region now includes numerous north-south-trending valleys containing continental alluvial, paludal, and colluvial materials that are interstratified with lava flows, tuffs, and tuffaceous sediments. The study area underwent intense volcanism during the middle to late Tertiary period and was heavily scarred by massive volcano-tectonic and caldera...
الصفحة 31 - Universal Transverse Mercator projection, Zone 11. Shaded-relief base from 1:250,000-scale Digital Elevation Model; sun illumination from northwest at 30 degrees above horizon 40 80 KILOMETERS Figure 11-Continued.
الصفحة 5 - Knowledge of the geologic diversity beneath the alluvial basins is indirect in most of the region. The...
الصفحة 7 - Mesozoic metasedimentary and metavolcanic rocks. The Sevier orogeny (Middle Jurassic and Late Cretaceous time) affected the entire area by contraction with regional detachments and was highlighted by north-south-trending thrust faulting (including the Pahranagat Range, Gass Peak, Lee Canyon, and Keystone thrusts within this study area) and simultaneous intrusions of granites of Mesozoic age throughout the Death Valley region (Grose and Smith, 1989) (fig.
الصفحة 25 - The structural framework of Pahute Mesa, Nevada is dominated by the Silent Canyon caldera complex, a buried, multiple collapse caldera complex. Using the boundary surface between low density Tertiary volcanogenic rocks and denser granitic and weakly metamorphosed sedimentary rocks (basement) as the outer fault surfaces for the modeled collapse caldera complex, it is postulated that the caldera complex collapsed on steeply dipping arcuate faults two, possibly three times following eruption of at least...
الصفحة 25 - ... arcuate faults two, possibly three times following eruption of at least two major ash-flow tuffs. The caldera and most of its eruptive products are now deeply buried below the surface of Pahute Mesa. Relatively lowdensity rocks in the caldera complex produce one of the largest gravity lows in the western conterminous United States. Gravity modeling defines a steep-sided, cup-shaped depression as much as 6,000 meters (19,800 feet) deep that is surrounded and floored by denser rocks.
الصفحة 5 - Antler orogeny also caused eastward thrusting of a more than 100,000-m-wide allochthon of deep-ocean shales, chert, and volcanic rocks. The leading edge of the Roberts Mountain thrust, formed during the Antler orogeny, is in the northwestern part of the Death Valley region (Grose and Smith, 1989). During Pennsylvanian time, the basin was filled, and shallow marine carbonates were deposited on the Mississippian-aged clastic rocks (Grose and Smith, 1989). As a 118...