Arikaree Formation

Arikaree Formation
Stratigraphic range:
late Oligocene to early[1]
Arikaree Formation over Brule Formation (Pawnee Buttes, Colorado)
TypeFormation / Group
Underliesunconsolidated sediment
OverliesChadron Formation or Brule Formation
Thicknessup to 426.5 feet (130 m)
Lithology
PrimarySiltstone, Sandstone
OtherCarbonate rock
Location
Regioncentral High Plains[1]
CountryUnited States
Type section
Named forArikara Indians[1]
Named byN. H. Darton[1]

The Arikaree Formation, also Arikaree Group or Arikaree Sandstone is a geological unit in the central High Plains of the western United States. It preserves fossils dating to the late Oligocene to early Miocene.[1]

See also

References

  1. ^ 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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