Usage:
No current usage.
(†Apishapa Shale (CO) replaced with Smoky Hill Shale Member of Niobrara Formation. See Smoky Hill.)
Geologic age:
Late Cretaceous
Type section, locality, area and/or origin of name:
Named from Apishapa River, Las Animas and Otero Cos., CO (Gilbert, 1896).
AAPG geologic province:
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 ([ ]).