AN ASSESSMENT OF COAL RESOURCES AVAILABLE FOR DEVELOPMENT
CENTRAL APPALACHIAN REGION
by
M. Devereux Carter and Nancy K. Gardner
U.S. Geological Survey Open-File Report 89-362
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| Figure 14. Estimated portion of each of the technologic restriction categories in each of the Matewan, Noble, Sylvester, and Vansant 7.5-minute quadrangle areas, Kentucky, West Virginia, and Virginia. Technologic factors restrict only deep coal beds in the Matewan and Vansant quadrangles. In the Noble and Sylvester quadrangles, technologic restrictions affect both surface and deep-minable coal beds, and are shown separately on the diagrams. (lt = less than, gt = greater than) |
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