Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Bird Spring Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Bird Spring Formation | |
| RT | Pennsylvanian |
| Lower Permian | |
| Utah | |
| California | |
| Nevada | |
| Upper Mississippian | |
| SN | Upper Mississippian, Pennsylvanian and Lower Permian. In Spring Mountain area, Nevada. Underlies Spring Mountain Formation and overlies Illipah Formation. Indexed with ages as applicable. |