Please Note: This is an archived website. It is recommended to search on-line for revised or newer information.
Link to USGS Home Page CGS home USGS home


Find Geologic Maps


Southern California Geology

Links and Resources

Site Contents

Contact Us

Oblique aerial photograph of the trace of a fault on the desert floor

Oblique aerial photograph of the trace of a fault on the desert floor of southern California; view looking east at the Coachella Valley trace of the Banning Fault in the northern Coachella Valley. The linear trace on the desert floor occurs where a fault plane that is vertical in the subsurface intersects the land surface. Thus, a cross-sectional view of a fault in a road cut expresses translates into a trace on the ground surface when viewed from above in this photograph. The linear is formed by scarps (topographic expression of fault movement), by vegetation concentrated along the fault trace where ground-water ponds up-slope from the fault, and by sand dunes that form where wind-blown sand is trapped by the vegetation. Photo by J.C. Matti, USGS, December, 1979.

Return to Previous Page

blue line
Southern California Areal Mapping Project logo
SCAMP Home Page
USGS Geology, Minerals, Energy, and Geophysics
California Geological Survey
USGS Home || Search USGS

blue line

  U.S. Department of the Interior, U.S. Geological Survey
Maintainer: WESP team webmaster contact
Privacy Statement || Disclaimer || Accessibility
This site last updated September 3, 2004 (ps)

First Gov