Wilcox group (Paleocene to Eocene) coals of the Sabine Uplift area, Texas and Louisiana

AAPG Studies in Geology -5
By: , and 
Edited by: Peter D. WarwickAlexander K. KarlsenMatthew D. Merrill, and Brett J. Valentine



The Wilcox Group (Paleocene to Eocene) of the Sabine uplift, a structural arch in northeastern Texas and northwestern Louisiana (Figure 1), has lignite zones that approach subbituminous rank (see Chapter 4, this publication). These coals are among the highest quality resources known within the Gulf Coastal Plain because of their low ash yield and sulfur content. The surface expression of the Sabine uplift is defined by the contact between coal-bearing rocks of the Wilcox Group and overlying fluvial rocks of the Carrizo Sand, which is the basal unit of the Claiborne Group (Figures 2, 3). The Sabine uplift study area includes parts of Harrison, Marion, Nacogdoches, Panola, Rusk, Sabine, San Augustine, and Shelby Counties in Texas and Bossier, Caddo, De Soto, Natchitoches, Red River, and Sabine Parishes in Louisiana (Figure 1). Adjacent counties and parishes that include the subsurface Wilcox Group extend the regional Sabine uplift area. The Wilcox in the subsurface is underlain by the Midway Group (Figure 3), a mudstone-dominated marine sequence of Paleocene age. Quaternary alluvium and terrace deposits overlying the Wilcox Group at the surface are limited to areas of modern drainage.

The total thickness of the Wilcox Group within the Sabine uplift area ranges from approximately 400 ft on outcrop to 2500 ft in subsurface (Kaiser, 1990). In a few places, the contact between the overlying Carrizo Sand and Wilcox Group is erosional, but in other places, the contact is gradational.

Study Area

Publication type Book chapter
Publication Subtype Book Chapter
Title Wilcox group (Paleocene to Eocene) coals of the Sabine Uplift area, Texas and Louisiana
Series title AAPG Studies in Geology
Chapter 5
Volume 62
Year Published 2011
Language English
Publisher American Association of Petroleum Geologists
Contributing office(s) Eastern Energy Resources Science Center
Description 14 p.
Larger Work Type Book
Larger Work Subtype Monograph
Larger Work Title Geologic assessment of coal in the Gulf of Mexico coastal plain
First page 95
Last page 108
Country United States
State Louisiana, Texas
Other Geospatial Sabine Uplift area
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