| Thin Elk Formation | |
|---|---|
| Stratigraphic range: Neogene | |
| Type | Formation |
| Location | |
| Region | South Dakota |
| Country | United States |
The Thin Elk Formation is a geologic formation in South Dakota. It preserves fossils dating back to the Neogene period.
| Ungulates reported from the Thin Elk Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Cormohipparion | C. occidentale | Ed Ross Ranch Quarry, Bennett County, South Dakota. [1] | Skull (F:AM 71872). [1] | An equid. | |