Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Deadwood Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Deadwood Formation | |
| RT | Lower Ordovician |
| Wyoming | |
| Montana | |
| Upper Cambrian | |
| South Dakota | |
| SN | Upper Cambrian and Lower Ordovician. In N Black Hills, conformably underlies Aladdin Sandstone. SE Montana, W South Dakota (Black Hills), and E Wyoming. Indexed with ages as applicable. |