| Conococheague Formation | |
|---|---|
| Stratigraphic range: Cambrian | |
 Etched section of rock from the Conococheague Formation from Washington County, Maryland (dolomite is lighter than the limestone) | |
| Type | sedimentary |
| Sub-units | Big Spring Station Member |
| Underlies | Beekmantown Dolomite |
| Overlies | Elbrook Formation[1] |
| Lithology | |
| Primary | Limestone |
| Other | dolomite, sandstone |
| Location | |
| Region | Appalachian Basin of eastern North America |
| Extent | Maryland, Pennsylvania, Virginia, West Virginia |
| Type section | |
| Named for | Conococheague Creek[2] |
| Named by | G. W. Stose, 1908 |
The Conococheague Formation is a mapped Appalachian bedrock unit of Cambrian age, consisting primarily of limestone and dolomite. It occurs in central Maryland, southern and central Pennsylvania, the Valley and Ridge of Virginia and easternmost West Virginia.[3]
- ^ Generalized Stratigraphic Column for West Virginia
- ^ Stose, G.W., 1908, The Cambro-Ordovician limestones of the Appalachian Valley in southern Pennsylvania: Journal of Geology, v. 16, p. 698-714.
- ^ Conococheague Formation on the United States Geological Survey website