Chalk Butte Formation
# Chalk Butte Formation

The Chalk Butte Formation is a geologic formation in Oregon. It preserves fossils dating back to the Neogene period.

## Fossil content

The following fossils have been reported from the formation:

* Antecalomys valensis
* Basirepomys pliocenicus
* Copemys cf. esmeraldensis
* Cupidinimus magnus
* Diprionomys parvus
* Dipoides vallicula
* Eucyon davisi
* Goniodontomys disjunctus
* Hypolagus vetus
* Peromyscus antiquus
* Pliohippus spectans
* Plionictis oregonensis
* Scapanus proceridens
* Dipoides sp.
* Spermophilus sp.
* Camelidae indet.
* Perognathinae indet.
* Soricidae indet.
* ?Vespertilionidae indet.
