Chadron Formation is a geological 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]
| 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 |
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See also
editReferences
edit- ↑ Nebraska Academy of Sciences (1985). Transactions of the Nebraska Academy of Sciences and Affiliated Societies. The Academy. p. 128. Retrieved 14 December 2012.
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