Map Showing Structure Contours and Overburden Thickness Isopleths of the Pittsburgh Coal Bed in Pennsylvania, Ohio, West Virginia, and Maryland
U.S. Geological Survey Open-File Report 97-864 (Sheet 1)
 |
[ Legend
| Index Map | Extent
]
[ Select Different Area]
Created by the EERT WWW Staff.
[an error occurred while processing this directive]