Open-File Report 00-189
This report summarizes geophysical investigations in the Amargosa Desert and surrounding areas conducted between 1997 and 2000 in support of the Death Valley Regional Water-Flow Modeling Project of the U.S. Geological Survey. These investigations used both gravity and aeromagnetic data to develop a regional-scale tectonic and lithologic model for the near-surface. Gravity data were inverted in order to estimate the depth to pre-Cenozoic basement throughout the study area. This basement surface is interpreted to be the contact between pre-Cenozoic carbonate rocks and overlying alluvium, an important component of water-flow models. Gravity data also were used to identify locations where basement rocks are anomalously dense, possibly indicating areas resistant to water flow. A new aeromagnetic survey of the central part of the study area was used to map concealed faults and areas underlain by volcanic rocks.
First posted November 13, 2001
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Blakely, Richard J., Langenheim, Victoria E., and Ponce, David A., 2000, Summary of Geophysical Investigations of the Death Valley Regional Water-Flow Modeling Project, Nevada and California: U.S. Geological Survey Open-File Report 00-189, 31 pp., https://pubs.usgs.gov/of/2000/0189/.