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Scientific Investigations Map 2814
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Geologic and Geophysical maps of the Las Vegas 30' X 60' Quadrangle, Clark and Nye Counties, Nevada, and Inyo County, California

By William R. Page,1 Scott C. Lundstrom,1 Anita G. Harris,1 Victoria E. Langenheim,2 Jeremiah B. Workman,1 Shannon A. Mahan,1 James B. Paces,1 Gary L. Dixon,3 Peter D. Rowley,4 B.C. Burchfiel,5 John W. Bell,6 and Eugene I. Smith7

Prepared in cooperation with the Southern Nevada Water Authority

Landsat TM (Thematic Mapper) false-color image of Las Vegas Valley and adjacent areas. (From U.S. Geological Survey Flagstaff Image Processing Facility, 1984)


As one of the fastest growing cities in the country, Las Vegas, Nevada, is challenged by major issues such as water supply and contamination, land subsidence due to ground-water withdrawal, and seismic and flood hazards. This report was designed to provide earth-science information that can be used to investigate these major issues. Also included in the report is information for Las Vegas visitors about how the rocks and landscape of the area’s scenic parks and lands formed.

The report also provides an integrated geologic and geophysical framework for ground-water investigations in the Las Vegas region. Geologic and geophysical mapping conducted for this report helped to identify faults, fractures, and other permeable zones that are pathways for ground-water flow and to determine the distribution of potential aquifers and ground-water barriers.

The publication contains two parts: the first, part A, includes the geologic map of the Las Vegas quadrangle, cross sections, and text with description of map units and discussion of the stratigraphic and structural framework of the map area; the second part, part B, includes isostatic gravity, aeromagnetic, and gravity inversion maps, geophysical cross sections of Las Vegas and Pahrump Valleys, and text describing the geophysical framework of the map area. The integration of geologic and geophysical information contained in the report offers a unique opportunity to apply basic geoscience techniques to help solve urban growth issues in this arid population center.

Version 1.0

Posted June 2005

Part or all of this report is presented in Portable Document Format. The latest version of Adobe Acrobat Reader or similar software is required to view it. If you wish to download the latest version of Acrobat Reader free of charge, click here.

1U.S. Geological Survey, Denver, CO
2U.S. Geological Survey, Menlo Park, CA
3Southwest Geology, Inc., Blackfoot, ID
4Geologic Mapping, Inc., New Harmony, UT
5Massachussetts Institute of Technology, Cambridge, MA
6Nevada Bureau of Mines and Geology, Reno, NV
7University of Nevada, Las Vegas, NV

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