Map showing depths to the Pittsburgh coal bed, mining activity, and related surface subsidence, Allegheny, Washington, and Westmoreland counties, Pennsylvania [map] / By Kent O. Bushnell.
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| Main Author: | |
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| Corporate Authors: | , |
| Format: | Government Document Map |
| Language: | English |
| Published: |
[Washington, D.C.] :
U.S. Geological Survey,
1975.
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| Series: | Miscellaneous field studies ;
map MF-693-A. |
| Subjects: |
| Item Description: | Relief indicated by spot heights and contours. Includes text, tables, and bibliography. "In cooperation with the Appalachian Regional Commission." |
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| Physical Description: | 1 map ; 60 x 108 cm. |