Brallier Formation
The Devonian Brallier Formation is a mapped bedrock unit in Pennsylvania, Maryland, West Virginia, and Virginia.
| Brallier Formation | |
|---|---|
| Stratigraphic range: Frasnian - Famennian | |
Outcrop of Brallier Formation on north side of Pennsylvania Turnpike, central Bedford County, near Mile Marker 138 | |
| Type | sedimentary |
| Sub-units | Black Creek Siltstone Member, Minnehaha Springs Member |
| Underlies | Greenland Gap Group and Scherr Formation |
| Overlies | Harrell Formation |
| Thickness | 1350 to 1800 feet in central PA |
| Lithology | |
| Primary | shale, sandstone |
| Location | |
| Region | Appalachian Mountains |
| Country | United States |
| Extent | Maryland, Pennsylvania, Virginia, and West Virginia |
| Type section | |
| Named by | Charles Butts, 1918 |
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