The Ash Hollow Formation of the
Ogallala Group is a
geological formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...
found in
Nebraska
Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the sout ...
and
South Dakota
South Dakota (; Sioux: , ) is a U.S. state in the North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Lakota and Dakota Sioux Native American tribes, who comprise a large porti ...
. It preserves
fossils dating back to the
Neogene period
Period may refer to:
Common uses
* Era, a length or span of time
* Full stop (or period), a punctuation mark
Arts, entertainment, and media
* Period (music), a concept in musical composition
* Periodic sentence (or rhetorical period), a concept ...
. It was named after
Ash Hollow, Nebraska and can be seen in
Ash Hollow State Historical Park.
is within this formation.
Fossil content
Mammals
Bats
Carnivorans
Eulipotyphlans
Lagomorphs
Rodents
Ungulates
Proboscideans
Reptiles
Birds
Crocodilians
Squamates
Testudines
Amphibians
Plants
See also
*
List of fossiliferous stratigraphic units in South Dakota
*
Paleontology in South Dakota
Paleontology in South Dakota refers to paleontological research occurring within or conducted by people from the U.S. state of South Dakota. South Dakota is an excellent source of fossils as finds have been widespread throughout the state. Durin ...
*
List of fossiliferous stratigraphic units in Nebraska
*
Paleontology in Nebraska
References
*
Neogene United States
Neogene geology of Nebraska
Neogene geology of South Dakota
Neogene geology of Wyoming
Lagerstätten
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