U.S. Geological Survey Open-File Report 01–393
Gravity and seismic-reflection data provide insights into the subsurface stratigraphy and structure of the California Wash area of southern Nevada. This area is part of the Lower Colorado flow system and stratigraphic and structural data are important inputs into developing the hydrogeologic framework. These data indicate that the basin beneath California Wash reaches depths of 2–3 km. The eastern margin of the basin coincides with a system of young (Quaternary and late Tertiary) faults, although both seismic and gravity data indicate that the major basin-bounding fault is 2–3 km west of the mapped young faults. Dry Lake Valley, the adjacent valley to the west, is characterized by thinner basin fill. The basin configuration beneath both California Wash and Dry Lake Valleys based on the inversion of gravity data is unconstrained because of the lack of gravity stations north of 36°30’. Broad aeromagnetic anomalies beneath pre-Cenozoic basement in the Muddy Mountains and Arrow Canyon Range reflect Precambrian basement at depths of ~5 km. These rocks are probably barriers to ground-water flow, except where fractured.
Last modified March 16, 2012
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Langenheim, V.E., Miller, J.J., Page, W.R., and Grow, J.A., 2001, Thickness and geometry ofCenozoic deposits inCalifornia Wash area,Nevada, based on gravityand seismic-reflection data: U.S. Geological Survey ?Open-File Report 01–393, 27 p., available at https://pubs.usgs.gov/of/2001/of01-393/.
Acknowledgments3 Geologic Setting
Drill Hole Data and Physical Properties
Gravity and Aeromagnetic Data
Depth to Basement
Discussion and Recommendations