Dunkard Group
The Permian Dunkard Group (Pd) is an area of rock, Early Permian in age, in the south of Ohio, southwestern Pennsylvania, West Virginia and the hilltops of the Georges Creek Basin of Maryland. In Ohio, it is found primarily in Washington County. It is notable for being one of the few areas of Permian sediment east of the Mississippi River. In addition, it is the youngest surface rock in the state of Ohio.
| Dunkard Group | |
|---|---|
| Stratigraphic range: Pennsylvanian-Permian | |
Sandstone (Greene Formation, Dunkard Group, Lower Permian; Monroe County, Ohio) | |
| Type | Group |
| Sub-units | Greene Formation, Washington Formation, Waynesburg Formation |
| Underlies | Igneous intrusives |
| Overlies | Monongahela Formation |
| Lithology | |
| Primary | Shale, sandstone, siltstone, coal |
| Other | Limestone |
| Location | |
| Region | Ohio, Pennsylvania, West Virginia, and Maryland |
| Country | United States |
| Type section | |
| Named for | Dunkard Creek |
| Named by | I.C. White in 1891 |
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