Spreading of the Ocean Floor: Undeformed Sediments in the Peru-Chile Trench

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Science  23 Feb 1968:
Vol. 159, Issue 3817, pp. 869-871
DOI: 10.1126/science.159.3817.869


None of the expected stratigraphic and structural effects of a spreading sea floor have been imposed on the sedimentary fill of the Peru-Chile Trench. During at least the last several million years, and perhaps during much of the Cenozoic, the trench has not been affected by an oceanic crust thrusting under the continent.