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USGS1984

Maps showing geomorphic and geologic evidence for Late Quaternary displacement along the Surprise Valley and associated faults, Modoc County, California

The maps in this report are designed to show the location, nature, and age of fault traces and lineaments that are interpreted to be the result of late Quaternary movement along the Surprise Valley and associated faults. These characteristics are important to scientists and engineers who study the surface faulting and earthquakes and should also be helpful to those concerned with land use and development on or near faults in swetern Surprose Valley. In addition, faults apparently control the location of modern geothermal activity in Surprise Valley (Hedel, 1981) and are thus important to geothermal exploration.

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