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Manuscript received, December 1, 1960.
Rice University. The writer is indebted to Norman D. Newell, of the American Museum of Natural History, for the photographs of Fig. 7, which had been previously published by Newell and Rigby (1957). Appreciation is also expressed to William Kanes, of umble Oil and Refining Company, who kindly provided information on the relief of the limestone surface beneath the South Cat Cay-Browns Cay oölite shoal.


In the Bahamas the post-Wisconsin rise in sea level flooded an irregular limestone surface which superimposed local increases and decreases in current velocity on the regional tidal regimen. The calcium carbonate supersaturated bank waters of the shoaler unsheltered rock areas were characterized by considerable current agitation and consequent oolite formation. The rate of oolite accumulation kept pace with or exceeded the rate of sea level rise, thereby resulting in the formation of extensive oolite shoals. The distribution of these shoals reflects the distribution of the limestone prominences which underlie them. The form variation exhibited by the shoals is apparently a product of the continuous or discontinuous nature of the underlying rock ridges.

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