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Coachella Valley

Oblique aerial photograph looking east at geologic and landscape features in the northern Coachella Valley, southern California. Geographic features include: LSBM, the Little San Bernardino Mountains on the distant skyline; IH, the Indio Hills; EH, Edom Hill; GH, Garnet Hill; WW, Whitewater River; DH, Desert Hot Springs. Geologic features include BF, Coachella Valley segment of the Banning Fault; SAF, Coachella Valley segment of the San Andreas Fault (referred to as the Mission Creek Fault by some authors); GHF, Garnet Hill Fault. All of these faults are strands of the San Andreas Fault system that have complex movement histories and complex interactions with each other (Matti and others, 1992). Features like the Indio Hills, Edom Hill, and Garnet Hill are warped-up parts of the Desert floor that reflect squeezing (compressional or contractional strain). These features and other evidence suggest that strain within the San Andreas system in the Coachella Valley is stepping progressively west (rightward in this view). Photo by J.C. Matti, USGS, December, 1979.

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