Influence of relative sea level changes on the construction of the Mississippi Fan |
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| Authors: | Arnold H Bouma James M Coleman Charles E Stelting Barry Kohl |
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| Institution: | (1) School of Geoscience and Department of Geology and Geophysics, Louisiana State University, 70803 Baton Rouge, Louisiana, USA;(2) Chevron Oil Field Research Co., P.O. Box 446, 90633 La Habra, California, USA;(3) Chevron USA Inc., 935 Gravier Street, 70112 New Orleans, Louisiana, USA |
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| Abstract: | A conceptual sea-level-driven depositional model for individual fanlobes (channel-overbank systems) of the Mississippi Fan
does not permit direct application of the sequence stratigraphic principles of Vail and colleagues. Deep Sea Drilling Project
Leg 96 results suggest that, during initial relative lowering of sea level, the canyon and upper fan channel were formed;
excavated fine-grained slope sediments may have formed a debris flow deposit base for the fanlobe. Continued lowering produced
constructional channel-levee-overbank deposits. Rising relative sea level inhibited input of coarse clastics, and channel
depressions filled with muds. A blanket of (hemi)pelagics represents relative high sea level stand. |
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