Usage:
Redwater Shale Member of Sundance Formation (CO*,SD*,WY*)
Redwater Member of Stump Formation (CO*,ID*,UT*,WY*)
Geologic age:
Late Jurassic (Oxfordian)*
Type section, locality, area and/or origin of name:
Type section: bluff 0.5 mi north of Redwater Creek, near mouth of Crow Creek, 9 mi northwest of Spearfish, SD, in S/2 sec. 2, T. 7 N., R. 1 E., Butte Co., SD. Origin of name not stated by author, but probably named from Redwater Creek (Imlay, 1947).
AAPG geologic province:
Bighorn basin*
Central Montana uplift*
Chadron arch*
Denver basin*
Green River basin*
Powder River basin*
Uinta uplift*
Williston basin*
Yellowstone province*
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 ([ ]).