--> ABSTRACT: Planktonic Zonation of the Paleogene of Texas and Louisiana Gulf Coast and Their Relationship to Relative Changes of Coastal Onlap, by Rashel N. Rosen, Bruce E. Bowen; #91020 (1995).

Datapages, Inc.Print this page

Planktonic Zonation of the Paleogene of Texas and Louisiana Gulf Coast and Their Relationship to Relative Changes of Coastal Onlap

Rashel N. Rosen, Bruce E. Bowen

Recent exploration activity in east and central Texas and southwest Louisiana has focused on Wilcox, Yegua, Vicksburg and downdip Hackberry respectively. Results have been highly variable because of the erratic distribution of reservoir quality sands, and the inability of correlating the sands to their updip age equivalents.

Paleogene Gulf Coast benthic zonation based on outcrop and subsurface studies has served as a means of correlation to industry since the late 1920's. We propose a planktonic zonation for the downdip Paleogene and discuss its relationship to the updip benthic assemblages, formations, and eustatic sea level variations.

Twenty-nine (29) planktonic datums are recognized, their highest occurrences and relationship to the condensed sections related to maximum flooding surfaces and systems tracts are discussed. This zonation is based on analyses of over 400 biostrat wells and logs and over 1500 miles of high-resolution seismic data in the Wilcox-Yegua-Frio trends.

AAPG Search and Discovery Article #91020©1995 AAPG Annual Convention, Houston, Texas, May 5-8, 1995