Uplift of the Continental Margin and Possible Continental Accretion off Oregon

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Science  30 Dec 1966:
Vol. 154, Issue 3757, pp. 1654-1656
DOI: 10.1126/science.154.3757.1654


Sedimentary rocks collected from the continental shelf and slope off the central coast of Orgeon contain fossil benthic foraminifers of Pliocene and Miocene age. These fossils indicate water depths much greater than those from which the rocks were collected, implying that the rocks have been uplifted as much as 1000 meters since their deposition. Uplift of this magnitude near the edge of the continent is interpreted as representing an early stage of continental accretion, possibly as a result of compression normal to the continental margin. The average maximum horizontal component of this accretion would be about 16 kilometers.