Subsurface Pennsylvanian Coal and Coaly Shale Samples, Archer County, North Central Texas



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Studies at the Bureau of Economic Geology (BEG) during the 2004 Fiscal Year (FY) for the National Coal Resources Data System (NCRDS) State Cooperative Program (NCRDS project) comprised sampling of subsurface coal and coaly shale beds occurring at depths of less than 2,000 ft in Archer County, Texas, and determination of their stratigraphic position. These studies are the initial part of a pilot program of identification, sampling, and characterization of North-Central Texas coals and are a continuation of BEG's NCRDS project investigations on the potential of these bituminous coals as a coalbed methane resource.

Fifty-seven coal, coaly, and organic-rich shale samples were collected from drilling cuttings from five wells for which cuttings are available at BEG's Austin Core Research Center facility. The collected samples represent relatively thin, coal-rich beds in the Strawn (Pennsylvanian), Canyon (Pennsylvanian), and Cisco (Pennsylvanian-Permian) Groups and will be used for coal-rank determinations by means of vitrinite reflectance measurements coordinated by the U.S. Geological Survey (USGS).

The information produced in the project was entered into a geographic information system (GIS) ArcView project. Digital files of this report and the collected samples are being submitted to the USGS, along with this report.


Data for this report is available at the Texas Data Repository:

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