Rockwell Formation
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| Rockwell Formation | |
|---|---|
| Stratigraphic range: Late Devonian to Early Mississippian | |
 Rockwell Formation at Sideling Hill, I-68 roadcut | |
| Type | Sedimentary |
| Sub-units | Finzel Tongue,[1] Patton Shale, Riddlesburg Shale[2] |
| Underlies | Pocono Formation and Purselane Sandstone |
| Overlies | Hampshire Formation |
| Thickness | 500 to 540 feet in WV,[3] 540 to 550 feet at Sideling Hill[4] |
| Lithology | |
| Primary | Sandstone, shale, conglomerate |
| Location | |
| Region | Appalachian Mountains |
| Extent | West Virginia, Maryland, Pennsylvania |
| Type section | |
| Named for | Rockwell Run, West Virginia |
| Named by | Stose and Swartz, 1912[3] |
The Rockwell Formation is a late Devonian and early Mississippian mapped bedrock unit in West Virginia, Maryland, and Pennsylvania, in the United States.
The Rockwell Formation was described at its type section at Rockwell Run in West Virginia as soft arkosic sandstone, fine hard conglomerate, and buff hackly shale.[3]
The formation was originally described in West Virginia by Stose and Swartz (1912).[3] It was first described in Maryland by H. E. Vokes (1957),[4] and later described in central Pennsylvania by C. R. Wood (1980).[5]
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