SEDIS - Thesaurus
Keyser Limestone  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Keyser Limestone | |
| RT | Lower Devonian |
| Virginia | |
| Pennsylvania | |
| Maryland | |
| West Virginia | |
| Upper Silurian | |
| Cayugan | |
| Helderberg Group | |
| SN | Upper Silurian to Lower Devonian? Pennsylvania, N West Virginia, W Maryland and W Virginia. Indexed with ages as applicable. Added to Thesaurus in 1985. |
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