Late Cenozoic Underthrusting of the Continental Margin off Northernmost California

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Science  05 Dec 1969:
Vol. 166, Issue 3910, pp. 1265-1266
DOI: 10.1126/science.166.3910.1265


The presence of magnetic anomaly 3, age 5 million years, beneath the continental slope off northernmost California, is evidence for underthrusting of the continental margin during the late Cenozoic. Folded and faulted strata near the base of the slope attest to deformation of the eastern edge of the turbidite sedimzents in the Gorda Basin; the deformation observed is exactly that expected from underthrusting. The relative motions of three crustal plates also suggest underthrusting, possibly with a major component of right-lateral slip.

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