Map showing generalized thickness contours of the Pittsburgh coal bed in Pennsylvania, Ohio, West Virginia, and Maryland (Q78188)
From geokb
Map showing generalized thickness contours of the Pittsburgh coal bed in Pennsylvania, Ohio, West Virginia, and Maryland; 1997; OFR; 97-748; compiled by Tewalt, S. J.; Ruppert, L. F.; Bragg, L. J.; Carlton, Richard; Brezinski, David; Wallack, R. N...
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English | Map showing generalized thickness contours of the Pittsburgh coal bed in Pennsylvania, Ohio, West Virginia, and Maryland |
Map showing generalized thickness contours of the Pittsburgh coal bed in Pennsylvania, Ohio, West Virginia, and Maryland; 1997; OFR; 97-748; compiled by Tewalt, S. J.; Ruppert, L. F.; Bragg, L. J.; Carlton, Richard; Brezinski, David; Wallack, R. N... |