No current usage.
(†Timpas Limestone (CO) replaced with Fort Hays Limestone Member of Niobrara Formation. See Fort Hays.)
Late Cretaceous
Not designated. Origin of name not stated by author, but probably named from Timpas Creek, which enters Arkansas River below Rocky Ford, Otero Co., CO (Gilbert, 1896).
Denver basin
Las Animas arch
Las Vegas-Raton basin
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).