No current usage.
(Rocks of †Arickaree Shale (KS) reallocated to Pierre Shale. See Pierre.)
Late Cretaceous
Named from Arikaree River in Cheyenne Co., northwestern KS (Cragin, 1896).
Las Animas arch
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 ([ ]).