Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Dunkard Group  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Dunkard Group | |
| RT | Permian |
| Pennsylvanian | |
| Ohio | |
| Pennsylvania | |
| Maryland | |
| West Virginia | |
| SN | Pennsylvanian and Permian. Includes Washington and Greene formations. W Maryland, E Ohio, SW Pennsylvania, and N West Virginia. Indexed with ages as applicable. |