Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Keefer Sandstone  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Silurian | |
| ....Middle Silurian | |
| .....Keefer Sandstone | |
| RT | Pennsylvania |
| Maryland | |
| West Virginia | |
| Clinton Group | |
| Rochester Formation | |
| SN | In Clinton Group. W Maryland, and from central Pennsylvania to NE West Virginia. |