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Banning fault in Coachella Valley

Oblique aerial photograph looking east at the Coachella Valley trace of the Banning Fault in the northern Coachella Valley, southern California. Prominent wash in centerground is Mission Creek; road on left is Dillon Road, on right is 20th Avenue. Geologic features include: (1) scarp of Mission Creek Strand, San Andreas Fault barely visible in left corner of photo; (2) linear marking trace of Banning Fault (arrow). 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. Where the Banning Fault trace exits the field of view to the right, the desert floor is bulged up on the south (right) side of the fault: this is the leading edge of Edom Hill (out of site to the southeast), an uplifted segment of the desert floor that has been warped up on the west side of the Banning Fault and possibly displaced right-laterally from similar landscape on the east side of the fault (barely visible in the extreme right-hand corner of the photograph). Photo by J.C. Matti, U.S. Geological Survey, December, 1979.

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This site last updated September 3, 2004 (ps)

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