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The AAPG/Datapages Combined Publications Database

GCAGS Transactions

Abstract


Gulf Coast Association of Geological Societies Transactions
Vol. 33 (1983), Pages 389-394

Characteristics of a Deep-Sea Channel on the Middle Mississippi Fan as Revealed by a High-Resolution Survey

David B. Prior, Charles E. Adams, James M. Coleman (1)

ABSTRACT

A high-resolution, deep-tow side-scan sonar and subbottom profiler survey has been completed across a section of the middle Mississippi Fan in water depths of 2470-2600 meters. A traverse across the fan axis channel revealed a variety of sediment types: a buried acoustically opaque unit, an extensive mantle of stratified, conformable sediments, and two channel infills. Sea floor morphology displayed ridge systems, both marginal to the channel and elsewhere on the fan surface, and various channel bedforms, including mottling and ripple systems. Rills and bed truncations are indicative of erosion on the fan surface.


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