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White River Formation

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White River Formation
Stratigraphic range: Late Eocene-Early Oligocene (Chadronian-Whitneyan)
~37.2–30.8 Ma PreꞒ Ꞓ O S D C P T J K Pg N
White River Badlands in South Dakota
TypeFormation
Sub-unitsBrule Formation,
Chadron Formation
OverliesPierre Shale
Thickness230–300 m (750–980 ft)
Lithology
PrimaryTuffaceous claystone, conglomerate
Location
Coordinates43°12′N 107°06′W / 43.2°N 107.1°W / 43.2; -107.1
Approximate paleocoordinates44°48′N 98°24′W / 44.8°N 98.4°W / 44.8; -98.4
RegionColorado,
Nebraska,
South Dakota,
Wyoming
Country United States
Extentnorthern Great Plains & central Rocky Mountains
Type section
Named forWhite River
(Missouri River tributary)
White River Formation is located in the United StatesWhite River FormationWhite River Formation (the United States)Show map of the United StatesWhite River Formation is located in WyomingWhite River FormationWhite River Formation (Wyoming)Show map of Wyoming

The White River Formation is a geologic formation of the Paleogene Period, in the northern Great Plains and central Rocky Mountains, within the United States.

It has been found in northeastern Colorado, Dawes County in western Nebraska, Badlands of western South Dakota, and Douglas area of southeastern Wyoming.

Fossil record

For the formation's prehistoric animals, see White River Fauna.

The geologic formation preserves fossils dating back to the Eocene and Oligocene Epochs of the Paleogene Period, during the Cenozoic Era. It contains the most complete Late Eocene−Priabonian and Early Oligocene−Rupelian vertebrate record in North America.

See also

References

  1. ^ DonaldProthero.com: "Eocene-Oligocene climatic change in North America: the White River Formation"
  2. DouglasFossils.com: Paleontology and Geology of The White River Formation
  3. USGS: White River Formation
  4. Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
  5. DigitalCommons@University of Nebraska - Lincoln: "Preliminary Biostratigraphy of the White River Group (Chadron and Brule Formations) in the Vicinity of Chadron, Nebraska", by Eric Paul Gustafson, January 1986.
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