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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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As used in this paper the Oligocene of the Upper Gulf Coast of Texas includes the Anahuac and Frio Formations, and the Vicksburg Group. The productive trend of these units in Railroad Commission District 3 extends in a band 40-50 miles wide paralleling the coast line from Jackson County on the west to the Sabine River on the east.
The Frio accounts for the major part of the production in this trend, with minor amounts of production derived from the Anahuac and Vicksburg.
It is the opinion of the writers that the downdip limits of sand development in the Oligocene have been fairly well defined. These limits in general follow the present-day coastline.
Future exploration will undoubtedly find exceptional sand developments within the downdip limits of the Frio.
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