White River Formation
| White River Formation | |
|---|---|
| Stratigraphic range: Late Eocene-Early Oligocene (Chadronian-Whitneyan) ~ | |
White River Badlands in South Dakota | |
| Type | Formation |
| Sub-units | Brule Formation, Chadron Formation |
| Overlies | Pierre Shale |
| Thickness | 230–300 m (750–980 ft) |
| Lithology | |
| Primary | Tuffaceous claystone, conglomerate |
| Location | |
| Coordinates | 43°12′N 107°06′W / 43.2°N 107.1°W |
| Approximate paleocoordinates | 44°48′N 98°24′W / 44.8°N 98.4°W |
| Region | Colorado, Nebraska, South Dakota, Wyoming |
| Country | United States |
| Extent | northern Great Plains and central Rocky Mountains |
| Type section | |
| Named for | White River (Missouri River tributary) |
The White River Formation is a geologic formation of the Paleogene Period, in the northern Great Plains and central Rocky Mountains, within the United States.
It has been found in northeastern Colorado, Dawes County in western Nebraska, Badlands of western South Dakota, and Douglas area of southeastern Wyoming.