Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Wissahickon Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Wissahickon Formation | |
| RT | Virginia |
| Pennsylvania | |
| Maryland | |
| Delaware | |
| lower Paleozoic | |
| Glenarm Series | |
| SN | Lower Paleozoic (?). Prevalent structure is schistose. Delaware, N Maryland, SE Pennsylvania, and Virginia. |