Arikaree Formation

Arikaree Formation
Arikaree Formation
Stratigraphic range: ; late Oligocene to earlyMiocene PreꞒ Ꞓ O S D C P T J K Pg N
	Formation / Group
Underlies	unconsolidated sediment
Overlies	Chadron Formation or Brule Formation
Thickness	up to 426.5 feet (130 m)
Lithology
Primary	Siltstone, Sandstone
Other	Carbonate rock
Location
Region	central High Plains
Country	United States
Type section
Named for	Arikara Indians
Named by	N. H. Darton

The Arikaree Formation, also Arikaree Group or Arikaree Sandstone is a

fossils dating to the late Oligocene to early Miocene.^[1]

References

^ ^a ^b ^c ^d ^e "Geologic Unit: Arikaree". National Geologic Database. Geolex — Unit Summary. United States Geological Survey. Retrieved 2024-02-24.

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