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Sedimentary Structures: Mississippi River Deltaic Plain

James M. Coleman
James M. Coleman
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Sherwood M. Gagliano
Sherwood M. Gagliano
The writers wish to acknowledge the guidance of Drs. R. J. Russell, James P. Morgan, and W. G. MeIntire in their work in Coastal Louisiana. Funds were obtained in part through Geography Branch, Office of Naval Research, Contract N onr 1575 (03) Task Order NR 388 002.
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January 01, 1965


Minor sedimentary structures were studied in cores and exposures in the deltaic and marginal deltaic plains of the Mississippi River. Selected active environments were sampled and the occurrence of sedimentary structures from each was recorded. Twenty-five individual structure types are illustrated and described with notations on processes responsible for their formation. Individual structures were found to occur in more than one environment, however, suites of structures were characteristic. Within the study area the following 12 depositional environments have been investigated: shelf, prodelta, delta front (distal bar, distributary mouth bar, distributary channel, and subaqueous Jevee), subaerial levee, marsh, swamp, interdistributary bay, mudflat, and fresh water lake. Within each environment, individual structures tell of one or several events, while the total assemblage of structures approximates many of the conditions active during deposition.

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SEPM Special Publication

Primary Sedimentary Structures and Their Hydrodynamic Interpretation

Gerard V. Middleton
Gerard V. Middleton
McMaster Ulliversity
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SEPM Society for Sedimentary Geology
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Publication date:
January 01, 1965




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