White River Formation
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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.
Quick Facts Type, Sub-units ...
White River Formation | |
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Stratigraphic range: Late Eocene-Early Oligocene (Chadronian-Whitneyan) ~37.2–30.8 Ma | |
Type | Formation |
Sub-units | Brule Formation, Chadron Formation[1] |
Overlies | Pierre Shale |
Thickness | 230–300 m (750–980 ft)[2] |
Lithology | |
Primary | Tuffaceous claystone, conglomerate[3] |
Location | |
Coordinates | 43.2°N 107.1°W / 43.2; -107.1 |
Approximate paleocoordinates | 44.8°N 98.4°W / 44.8; -98.4 |
Region | Colorado, Nebraska, South Dakota, Wyoming |
Country | United States |
Extent | northern Great Plains & central Rocky Mountains |
Type section | |
Named for | White River (Missouri River tributary) |
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It has been found in northeastern Colorado, Dawes County in western Nebraska, Badlands of western South Dakota, and Douglas area of southeastern Wyoming.[1]