Usage:
Crow Creek Member of Pierre Shale (NE,SD*)
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Type locality: at and south of mouth of Crow Creek, [between Missouri River and Bedashosha Lake], in secs. 23 and [24], T. 106 N., R. 71 W., [Bedashosha Lake 7.5-min quadrangle], southwestern Buffalo Co., [Crow Creek Indian Reservation], central SD (Gries and Rothrock, 1941; Crandell, 1950).
AAPG geologic province:
Salina basin*
Sioux uplift*
Williston 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 ([ ]).