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Science 23 November 1984:
Vol. 226. no. 4677, pp. 965 - 967
DOI: 10.1126/science.226.4677.965
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Articles

Biological Communities at the Florida Escarpment Resemble Hydrothermal Vent Taxa

C. K. PAULL 1, B. HECKER 2, R. COMMEAU 3, R. P. FREEMAN-LYNDE 4, C. NEUMANN 5, W. P. CORSO 6, S. GOLUBIC 7, J. E. HOOK 7, E. SIKES 8, and J. CURRAY 9

1 Scripps Institution of Oceanography, La Jolla, California 92093
2 Lamont-Doherty Geological Observatory, Palisades, New York
3 U.S. Geological Survey, Woods Hole, Massachusetts 02543
4 Naval Ocean Research and Development Activity, Bay Saint Louis, Mississippi, 39529
5 University of North Carolina, Chapel Hill, 27514
6 University of Texas, Austin 78751
7 Boston University, Boston, Massachusetts 02215
8 University of North Carolina
9 Scripps Institution of Oceanography

Dense biological communities of large epifaunal taxa similar to those found along ridge crest vents at the East Pacific Rise were discovered in the abyssal Gulf of Mexico. These assemblages occur on a passive continental margin at the base of the Florida Escarpment, the interface between the relatively impermeable hemipelagic clays of the distal Mississippi Fan and the jointed Cretaceous limestone of the Florida Platform. The fauna apparently is nourished by sulfide rich hypersaline waters seeping out at near ambient temperatures onto the sea floor.

Submitted on June 4, 1984
Accepted on September 28, 1984


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