Usage:
Hulett Sandstone Member of Sundance Formation (MT?,SD*,WY*)
Hulett Sandstone Member of Rierdon Formation of Sundance Group (WY)
Geologic age:
Jurassic, Middle*
Callovian*
Type section, locality, area and/or origin of name:
Type section: north side of Bush Canyon, about 2.5 mi north of Hulett, WY, in secs. 25 and 36, T. 55 N., R. 65 W., Crook Co., WY (Imlay, 1947).
AAPG geologic province:
Powder River basin*
Williston basin*
Chadron 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 ([ ]).