Upper Cretaceous bituminous coal deposits of the Olmos Formation, Maverick County, Texas

AAPG Studies in Geology 62- 13
By: , and 
Edited by: Peter D. WarwickAlexander K. KarlsenMatthew D. Merrill, and Brett J. Valentine



This report describes the bituminous coal deposits of the Olmos Formation (Navarro Group, Upper Cretaceous; Figures 1, 2) of Maverick County in south Texas. Although these were not evaluated quantitatively as part of the current Gulf Coastal Plain coal-resource assessment, a detailed review is presented in this chapter.

Prior to the late 1920s, these coal beds were mined underground on a large scale in the vicinity of Eagle Pass, Texas (Figure 1). Since the 1970s, Olmos Formation coals have been mined extensively in both underground and surface mines in nearby Coahuila, Mexico, to supply mine-mouth fuel for power generation at a plant nearby. A tract northeast of Eagle Pass was permitted in the late 1990s for surface mining. In east-central Maverick County, a coalbed methane field is being developed in coal beds of the lower part of the Olmos Formation (Barker et al., 2002; Scott, 2003).

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Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title Upper Cretaceous bituminous coal deposits of the Olmos Formation, Maverick County, Texas
Series title AAPG Studies in Geology
Series number 62
Chapter 13
ISBN 9781629810256
DOI 10.1306/13281371St621291
Volume 62
Year Published 2011
Language English
Publisher American Association of Petroleum Geologists
Contributing office(s) Eastern Energy Resources Science Center
Description 9 p.
Larger Work Type Book
Larger Work Subtype Monograph
Larger Work Title Geologic assessment of coal in the Gulf of Mexico coastal plain: AAPG Studies in Geology vol. 62
First page 277
Last page 285
Country United States
State Texas
County Maverick County