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Progressive Shoaling of Plio-Pleistocene Margins Little Bahama Bank

By
Stuart Charles Williams
Stuart Charles Williams
University of Miami, Rosenstiel School of Marine and Atmospheric Science, Comparative Sedimentology Laboratory, Fisher Island Station, Miami Beach, Florida 33139
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Published:
January 01, 1983

Abstract

Study of four cores taken across Little Bahama Bank has revealed a facies evolution characterized by general shoaling of the bank margins. Following flooding of an early Pliocene(?) shallow bank margin, a 40 to 60 m (130 to 195 ft) deep fore-reef slope, was buried by a marginal reef and capped by bedded, non-skeletal grainstones. This shoaling sequence represents a change in bank character from a flooded, flat-topped bank with sloping margins, through an atoll-like stage of raised reef rims and deeper interior, to a shallow, flat-topped configuration similar to the present.

Three additional findings include: (I) identification of a major bankwide change from predominantly skeletal to non-skeletal deposition; (2) addition of a third, deeper style of deposition to the previously known “awash” and atoll-like stages of the Bahamas; and (3) discovery of a bankwide body of young, well-developed dolomite in the shallow subsurface of western Little Bahama Bank.

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Contents

SEPM Core Workshop Notes

Carbonate Buildups-A Core Workshop

Paul M. Harris
Paul M. Harris
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SEPM Society for Sedimentary Geology
Volume
4
ISBN electronic:
9781565762596
Publication date:
January 01, 1983

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