Chadron Formation
Rock formation in North Dakota, South Dakota, Nebraska, and Wyoming
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Chadron Formation is a rock formation in North Dakota, South Dakota, northwestern Nebraska, and eastern Wyoming. It is named after the town of Chadron, Nebraska. It was mapped out by Carl Vondra in the 1950s.[1]
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Unit ofWhite River Formation
UnderliesBrule Formation
OverliesFox Hills Formation, Yellow Mounds Paleosol, Pierre Shale
| Chadron Formation | |
|---|---|
| Stratigraphic range: Late Eocene ~ | |
| Type | Geological formation |
| Unit of | White River Formation |
| Underlies | Brule Formation |
| Overlies | Fox Hills Formation, Yellow Mounds Paleosol, Pierre Shale |
| Lithology | |
| Primary | Fine grained clastic rocks |
| Other | Tuff, Sandstone |
| Location | |
| Region | Nebraska, Wyoming, North Dakota, South Dakota |
| Country | United States |
| Type section | |
| Named for | Chadron, Nebraska |
