Large right-lateral displacements along the Death Valley-Furnace Creek fault zone have probably taken place since Middle Jurassic time. Matching of Middle Jurassic granitic rocks (160 m.y. old by K-Ar dating) on either side of the fault zone suggests displacement on the order of 30 miles. The distribution of Pliocene sedimentary rocks (3.5 m.y. old by K-Ar dating) in the same region suggests the possibility of approximately 3000 feet of right-lateral movement since Pliocene time. The calculated rate of displacement since the Middle Jurassic is similar to the tentative rate since the late Pliocene:

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