Paleocene Coal Deposits of the Wilcox Group, Northeast Texas
Published:January 01, 2011
Robert W. Hook, Peter D. Warwick, John R. SanFilipo, Douglas J. Nichols, Sharon M. Swanson, 2011. "Paleocene Coal Deposits of the Wilcox Group, Northeast Texas", Geologic Assessment of Coal in the Gulf of Mexico Coastal Plain, Peter D. Warwick, Alexander K. Karlsen, Matthew Merrill, Brett J. Valentine
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The surface exposure of the Paleocene Wilcox Group in northeast Texas varies in width from 9 to 27 mi along an arcuate outcrop that extends southwest approximately 156 mi from the Texas-Arkansas State line to 32° latitude. Parts of Bowie, Camp, Cass, Franklin, Henderson, Hopkins, Morris, Navarro, Rains, Titus, Van Zandt, and Wood Counties are included in this outcrop belt (Figure 1). This area forms the northwestern flank of the East Texas Basin (Figure 2), the axis of which separates northeast Texas from the Sabine uplift structural area. The Wilcox Group dips south and southeast at 2° or less toward the axis of the East Texas Basin, with the exception of local salt-dome structures and a transcurrent structural high that extends from Monticello to Martin Lake (Figure 1).
The Wilcox Group conformably overlies the mudstone-dominated Midway Group, a marine unit of lower Paleocene age (Figure 3). In most of northeast Texas, the Wilcox is overlain and locally scoured by the Carrizo Sand of the Claiborne Group. Where the Car-rizo Sand is absent in extreme northeast Texas (Morris and Cass Counties, Figure 1), marine sandstone and mudstone deposits of the Reklaw Formation overlie the Wilcox Group (Figure 3). Holocene deposits overlie the Wilcox Group in areas of modern-day drainages. The thickness of the Wilcox Group in northeast Texas increases downdip from about 500 ft near the outcrop to approximately 2000 ft near the axis of the East Texas Basin
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Geologic Assessment of Coal in the Gulf of Mexico Coastal Plain
This publication is the fifth in a searies of reports by the U.S. Geological Survey on the assessment of the quantity and quality of the nation's coal deposits that potentially can be mined during the next few decades. For eight years (1995-2003), geologic, geochemical, and resource information was collected and compiled for the five major coal-producing regions of the United States. This volume contains the assessment results for the Gulf of Mexico Coastal Plain region. The contents of this volume were compiled mainly during the 8-year period mentioned above. However, every effort has been made to update the references and text to incorporate new work that has been completed since the original compilation period.