Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Arikaree Group  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Tertiary | |
| ....Arikaree Group | |
| RT | Wyoming |
| Montana | |
| Colorado | |
| lower Miocene | |
| upper Oligocene | |
| South Dakota | |
| White River Group | |
| SN | Upper Oligocene to lower Miocene. Previously considered Miocene. The Arikaree Formation has been considered Miocene. Comprises Sharps, Monroe Creek, and Harrison Formations. Colorado, S South Dakota, SE Montana, and SE Wyoming. Indexed with upper Oligocen |