| Age | Late Eocene ~ |
|---|---|
| Period | Eocene |
| Prilithology | Fine grained clastic rocks |
| Otherlithology | Tuff, Sandstone |
| Namedfor | Chadron, Nebraska |
| Region | Nebraska, Wyoming, North Dakota, South Dakota |
| Country | United States |
| Unitof | White River Formation |
| Underlies | Brule Formation |
| Overlies | Fox Hills Formation, Yellow Mounds Paleosol, Pierre Shale |
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]
References
- ^ Nebraska Academy of Sciences (1985). Transactions of the Nebraska Academy of Sciences and Affiliated Societies. The Academy. p. 128. Retrieved 14 December 2012.