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Science 2 March 1984:
Vol. 223. no. 4639, pp. 926 - 928
DOI: 10.1126/science.223.4639.926
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Articles

Antiquity of the Continental Slope Along the Middle-Atlantic Margin of the United States

D. B. PRIOR 1, J. M. COLEMAN 1, and E. H. DOYLE 2

1 Coastal Studies Institute, Louisiana State University, Baton Rouge 70803
2 Shell Development Company, Houston, Texas 77001

A detailed high-resolution geophysical study of part of the continental slope along the mid-Atlantic margin of the United States indicates that it is an ancient, relict landscape largely unmodified by modern slope processes. The slope morphology is heavily influenced by bedrock outcrops, including joints and bedding planes, rather than by any single degradational process. A pelagic drape averaging 3 to 5 meters in thickness blankets the slope. Carbon-14 dates from eight drop cores show that the drape was deposited in late Pleistocene and Holocene times. The Holocene part of the drape, comprising the uppermost 1 meter, was deposited at a continuous rate of 10 centimeters per 1000 years. Most features on the slope predate the drape cover.

Submitted on January 5, 1983
Accepted on December 14, 1983


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Mesozoic-Cenozoic clastic depositional environments revealed by DSDP Leg 93 drilling on the continental rise off the eastern United States.
S. W. Wise Jr., J. E. Van Hinte, G. S. Mountain, B. N. M. Biart, J. Mitchener Covington, W. S. Drugg, D. A. Dunn, J. Farre, D. Habib, J. A. Haggerty, et al. (1986)
Geological Society, London, Special Publications 21, 35-66
   Abstract »    PDF »
Recent Sedimentation on the New Jersey Slope and Rise.
D. J. Stanley, D. J. Stanley, T. A. Nelsen, and R. Stuckenrath (1984)
Science 226, 125-133
   Abstract »    PDF »


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