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Science 30 December 1966:
Vol. 154. no. 3757, pp. 1644 - 1647
DOI: 10.1126/science.154.3757.1644
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Articles

Lower Cretaceous Rocks (Neocomian-Albian) Dredged from Blake Escarpment

Bruce C. Heezen 1 and Robert E. Sheridan 1

1 Department of Geology and Lamont Geological Observatory, Columbia University, Palisades, New York 10964

Algal calcarenites, Neocomian to Aptian in age, dredged from 3000 to 5000-meter depth on Blake Escarpment, are the oldest rocks yet obtained from deep-sea outcrops. Five thousand meters of post-Aptian subsidence of the Blake Plateau is thus established. Aptian-Albian calcilutites obtained from depths of less than 3000 meters mark the establishment of an offshore environment.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)