Depositional history of the Lagniappe Delta,northern Gulf of Mexico |
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| Authors: | Jack L Kindinger |
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| Institution: | (1) U.S. Geological Survey, 227 Second Ave. N., 33701 St. Petersburg, FL, USA |
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| Abstract: | The northern Gulf of Mexico continental shelf is characterized by superimposing deltas. One such delta, informally named Lagniappe,
extends east of the Mississippi Delta from mid-shelf to the continental slope. This late Wisconsinan delta is adjacent to,
but not associated with the Mississippi Delta complex: the fluvial source was probably the ancient Pearl and/or Mobile Rivers.
The fluvially dominated Lagniappe Delta is characterized by complex sigmoid-oblique seismic-reflection patterns, indicating
delta switching of high-energy sand-prone facies to low-energy facies. The areal distribution and sediment thickness of the
delta were partially controlled by two diapirs. |
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