San Gorgonio quadrangle showing San Andreas Rift, Mission Creek Fault.

California, San Gorgonio quadrangle of the U.S. Geological Survey showing the San Andreas Rift and the Mission Creek Fault. Earthquake Investigation Commission. Andrew B. Graham Co., Lithographers, Washington, D.C. (Carnegie Institution of Washington. 1908)

U.S. Geological Survey

1908

1908

Carnegie Institution

1:125 000

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