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Chadron Formation

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Chadron Formation is a rock formation in North Dakota ,South Dakota and Nebraska. It is named after the town of Chadron, Nebraska. It was mapped out by Carl Vondra in the 1950s.[1]

References

  1. ^ Nebraska Academy of Sciences (1985). Transactions of the Nebraska Academy of Sciences and Affiliated Societies. The Academy. p. 128. Retrieved 14 December 2012.