Usage:
Sharon Springs Member of Pierre Shale (CO*,KS*,MT*,NE*, NM*,SD*,WY*)
Sharon Springs Shale Member of Pierre Shale of Montana Group (KS)
Subunits:
Ardmore Bentonite Beds (CO*,ND*,WY*).
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Notable exposures at and around town of Sharon Springs, Wallace Co., northwestern KS (Elias, 1931).
AAPG geologic province:
Anadarko basin
Chadron arch
Denver basin*
Las Vegas-Raton basin*
North Park basin*
Powder River basin*
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 ([ ]).