The Chalk Butte Formation is a
geologic 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 ...
in
Oregon
Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...
. It preserves
fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
dating back to the
Neogene
The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya) to the beginning of the present Quaternary Period Mya. ...
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 ...
.
[Chalk Butte Formation]
at Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...
.org[Chalk Butte Formation]
at USGS
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, a ...
[Chalk Butte Formation publications]
at USGS
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, a ...
Fossil content
The following fossils have been reported from the formation:
[Shotwell, 1970]
* '' Antecalomys valensis''
* '' Basirepomys pliocenicus''
* '' Copemys cf. esmeraldensis''
* '' Cupidinimus magnus''
* '' Diprionomys parvus''
* '' Dipoides vallicula''
* ''Eucyon davisi
''Eucyon'' (Greek: : good, true; : dog) is an extinct genus of medium omnivorous coyote-like canid that first appeared in the Western United States during the late Middle Miocene 10 million years ago. It was the size of a jackal and weighed ar ...
''
* '' Goniodontomys disjunctus''
* '' Hypolagus vetus''
* '' Peromyscus antiquus''
* '' Pliohippus spectans''
* '' Plionictis oregonensis''
* '' Scapanus proceridens''
* '' Dipoides sp.''
* '' Spermophilus sp.''
* Camelidae indet.
* Perognathinae indet.
* Soricidae indet.
* ?Vespertilionidae indet.
See also
* List of fossiliferous stratigraphic units in Oregon
This article contains a list of fossil-bearing stratigraphic units in the state of Oregon, Oregon, U.S.
Lists of fossiliferous stratigraphic units Cenozoic
Mesozoic
Paleozoic
See also
* Paleontology in Oregon
* Lists of Oregon- ...
* Paleontology in Oregon The location of the state of Oregon
Paleontology in Oregon refers to paleontological research occurring within or conducted by people from the U.S. state of Oregon. Oregon's geologic record extends back approximately 400 million years ago to the ...
References
Bibliography
* {{cite LSA , last=Shotwell , first=J. A , year=1970 , title=Pliocene mammals of southeast Oregon and adjacent Idaho , journal= Bulletin of the Museum of Natural History, University of Oregon , volume=17 , pages=1–103
Neogene geology of Oregon
Miocene Series of North America
Messinian
Tortonian
Pliocene Series of North America
Hemphillian
Zanclean
Paleontology in Oregon
Formations