--> Abstract: Controls on Variability of Depositional Style in Carboniferous Submarine Fan Complexes of the Ouachita Basin of Oklahoma and Arkansas, by J. L. Coleman, Jr.; #90987 (1993).

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COLEMAN, JAMES L., Jr., Amoco Production Company, Houston, TX

ABSTRACT: Controls on Variability of Depositional Style in Carboniferous Submarine Fan Complexes of the Ouachita Basin of Oklahoma and Arkansas

The Paleozoic stratigraphic succession of the Ouachita Basin is dominated by deep water siliclastics, carbonates, and chert. Volumetrically, siliciclastics of the Carboniferous Stanley, Jackfork, Johns Valley, and Atoka Formations make up the preponderance of this interval. Well-documented, shelf biostratigraphy and paleoenvironmental indicators help constrain age and depositional environment interpretations of the basinal sedimentary rocks. This study illustrates the influence of eustacy, climate, and tectonics on the basinal sedimentation of four sequential stratigraphic units.

The Stanley fan complex was deposited during an overall sea level highstand, and is a thick shale interval with upper and lower sandstone sections. The overlying Jackfork is predominantly a sandstone section, with no shelf equivalent, and was deposited following a major eustatic fall. The Johns Valley represents highstand basinal sedimentation at the initiation of Ouachita Basin shelf collapse. The Atoka Formation is a complex of basinal, slope, and shelf margin siliclastics deposited during a rising sea level as a result of overwhelming tectonic influence, abundant sediment supply, and increasing accommodation space.

AAPG Search and Discovery Article #90987©1993 AAPG Annual Convention, New Orleans, Louisiana, April 25-28, 1993.