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The AAPG/Datapages Combined Publications Database

GCAGS Transactions

Abstract


Gulf Coast Association of Geological Societies Transactions
Vol. 12 (1962), Pages 223-229

New Orleans Barrier Island

R. L. Corbeille (1)

ABSTRACT

The New Orleans Barrier Island has been sampled in surface exposures and by coring throughout 10 miles of its length. The island trends approximately east-west. and is 3 miles wide Maximum thickness is 35 feet.

Radiocarbon dates demonstrate that this island was a contemporary of the Maringouin and Teche phases of the Mississippi River, and was buried by the younger sediments of the Metairie subdelta. Features indicative of a barrier island depositional environment are the associated open-Gulf fauna, grain-size increase from bottom to top, and sedimentary structures, mainly shallow-dip cross-bedding and horizontal bedding. Heavy mineral content is related to an Eastern Gulf source, and the median grain size is too large to ascribe solely to the Mississippi River.


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