Chadron Formation

Last updated
Chadron Formation
Stratigraphic range: Late Eocene
~37–34  Ma
O
S
D
C
P
T
J
K
Pg
N
Type Geological formation
Unit of White River Formation
Underlies Brule Formation
Overlies Fox Hills Formation, Yellow Mounds Paleosol, Pierre Shale
Lithology
PrimaryFine grained clastic rocks
OtherTuff, Sandstone
Location
Region Nebraska, Wyoming, North Dakota, South Dakota
CountryUnited States
Type section
Named forChadron, Nebraska

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

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