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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 69 (1985)

Issue: 2. (February)

First Page: 237

Last Page: 237

Title: Woodbine Palynofacies--Their Relationship to Tuscaloosa of Gulf Coast: ABSTRACT

Author(s): Terry L. Beach

Article Type: Meeting abstract


A recent palynologic study of the Texas Woodbine and comparison with the Gulf Coast Tuscaloosa have produced some interesting depositional models and increased our basic understanding of the relationship between these 2 petroliferous formations. Although age considerations and environments of deposition for the Woodbine were already determined from previous work, the distribution of palynomorphs is documented in this study. Inasmuch as the Woodbine is exposed in outcrop, several localities were available for detailed collecting. The Woodbine delta is interpreted to be a complex depositional system, and the palynomorph occurrences were sensitive to the ever-changing environments (interpreted from the many facies). Although widely separated geographically, the presence of s ch diagnostic palynomorphs as the dinoflagellate species Kiokansium unituberculatum and the spore Klukisporites crassiterminatus in both the Woodbine and the Tuscaloosa established at least a partial Cenomanian stratigraphic equivalence for these formations. While the Woodbine and the Tuscaloosa deposition began in the earliest middle Cenomanian, the Woodbine culminated in the early late Cenomanian, and Tuscaloosa sedimentation continued through late Cenomanian. Strata older than middle Cenomanian are recognized by the occurrence of the dinoflagellate species Ovoidinium verrucosum in both formations, suggesting the stratigraphic equivalence of the Texas Grayson Formation and the Louisiana Washita facies. The species associations (palynofacies) seen in the Woodbine and in some places in t e Tuscaloosa could aid in the reconstruction of the environments of deposition for the Tuscaloosa Formation.

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