Keyser Formation
The Late Silurian to Early Devonian Keyser Formation is a mapped limestone bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia.
| Keyser Formation | |
|---|---|
| Stratigraphic range: Pridoli-Lochkovian | |
Outcrop of the Keyser Formation on U.S. Route 522 in Fulton County, Pennsylvania, north of Warfordsburg | |
| Type | Sedimentary |
| Unit of | Helderberg Group |
| Sub-units | Byers Island, Jersey Shore & La Vale Members |
| Underlies | New Creek Limestone and Old Port Formation |
| Overlies | Tonoloway Formation |
| Thickness | 33 m (108 ft) at Allegheny Furnace |
| Lithology | |
| Primary | Limestone |
| Location | |
| Coordinates | 38.3°N 79.6°W |
| Approximate paleocoordinates | 36.3°S 41.5°W |
| Region | Pennsylvania, Maryland, Virginia, West Virginia |
| Country | United States |
| Extent | Appalachian Mountains |
| Type section | |
| Named for | Keyser, West Virginia |
| Named by | E. O. Ulrich |
| Year defined | 1911 |
Keyser Formation (the United States) Keyser Formation (Virginia) | |
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