Harrell Shale
The Devonian Harrell Formation is a mapped bedrock unit in Pennsylvania, Maryland, West Virginia, and Virginia.
| Harrell Shale Group | |
|---|---|
| Stratigraphic range: Frasnian | |
| Type | Group |
| Sub-units | Burket Shale |
| Underlies | Brallier Formation, Sonyea Formation, Trimmers Rock Formation |
| Overlies | Mahantango Formation, Millboro Shale, and Tully Limestone |
| Lithology | |
| Primary | shale, sandstone |
| Location | |
| Region | Appalachian Mountains |
| Country | United States |
| Type section | |
| Named by | Charles Butts, 1918 |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.