Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Brule Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Paleogene | |
| ....Oligocene | |
| .....Brule Formation | |
| RT | Wyoming |
| Colorado | |
| Nebraska | |
| South Dakota | |
| White River Group | |
| lower Oligocene | |
| middle Oligocene | |
| SN | In White River Group. Lower and middle Oligocene. Previously considered lower Oligocene. In NE Colorado, W Nebraska, W South Dakota, and E Wyoming. Indexed with lower Oligocene and/or middle Oligocene as applicable. |