Cussewago Formation
| Cussewago Formation | |
|---|---|
| Stratigraphic range: Devonian | |
| Type | Formation |
| Underlies | Bedford Shale |
| Overlies | Riceville Shale |
| Thickness | up to 100' |
| Lithology | |
| Primary | Sandstone |
| Other | Shale |
| Location | |
| Region | Pennsylvania |
| Country | United States |
| Type section | |
| Named for | Cusswago Valley |
| Named by | White (1881, p. 94-96) |
The Cussewago Formation is a geologic formation found Pennsylvania, Ohio and West Virginia. This formation represents a paleo-river delta containing sandstone as well as siltstone and shale.