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Hollister Valley

Creeping Segment of the San Andreas Fault


View east-northeast across the downdrop east of the San Andreas fault. (more below)
City nestled in faults
Photo (c) 2007 Andrew Alden, licensed to About.com (fair use policy)
We are standing on the Hollister Hills, at the eastern edge of the Gabilan Range. Beyond the bare field runs the San Benito River, nearly dry in August. We are looking east across what was once, in Pleistocene times, San Benito Lake (more background here). The Calaveras fault runs along the near side of the hill on the right; farther south it is succeeded by the Paicines fault. At the foot of the distant Diablo Range is the Quien Sabe fault. Movements in this region are complex and not fully understood.
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