Map showing areal extent of the Pittsburgh Coal Bed and horizon and mined areas of the Pittsburgh Coal Bed in Pennsylvania, Ohio, West Virginia, and Maryland
No abstract available.
Kentucky, Ohio, Pennsylvania, Virginia, West Virgi↗
Geology topics
John Tully
Publications and source records attributed to John Tully.
Coal fields of the conterminous United States
Explore the source record for details and available documents.
Open-File Report↗