Farallon Trench

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The pre-existing Farallon Trench from 10 to 30 Ma.
The pre-existing Farallon Trench from 10 to 30 Ma.

The Farallon Trench was an ancient oceanic trench on the west coast of North America during the late Cretaceous period. When the trench disappeared, it turned into the San Andreas Fault. Since then, it has spread out to the north and south.

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