Usage:
Gypsum Spring Formation (MT*,SD*,WY*)
Gypsum Spring Member of Twin Creek Limestone (ID*,UT*,WY*)
Subunits:
Kendall Sandstone Member (WY).
Geologic age:
Jurassic, Middle*
Bajocian, early*
Bajocian, middle*
Type section, locality, area and/or origin of name:
Not designated. Named from exposures near a gypsum spring on Red Creek, Fremont Co., WY (Love, 1939).
AAPG geologic province:
Uinta uplift*
Uinta basin*
Wasatch uplift*
Green River basin*
Snake River basin*
Yellowstone province*
Wind River basin*
Powder River 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 ([ ]).