Land of Sunshine by William Deverell

Author:William Deverell
Language: eng
Format: epub
ISBN: 9780822973119
Publisher: University of Pittsburgh Press

“The ultimate origin of the debris flows,” [geologist Leon Silver] said, “is the continuous tectonic front that has made this one of the steepest mountain fronts in North America and produced a wilderness situation not a hundred metres from people's houses.”

The continuous tectonic front is where the North American and Pacific Plates are sliding past each other—where Bakersfield moves toward Mexico City while Burbank heads for Alaska. Between Bakersfield and Burbank lie the San Gabriel Mountains. With the San Bernardino Mountains east of them, they trend east-west, forming a kink in the coastal ranges that come down from San Francisco and go on to Baja California. The kink conforms to a bend in the San Andreas Fault, which runs along the inland base of the mountains. The kink looks like this:

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