Usage:
Sun Valley Group (ID*)
Subunits:
(alphabetical) --all in ID*: Dollarhide Formation, Grand Prize Formation, Wood River Formation.
Geologic age:
Pennsylvanian, Middle*
Desmoinesian*
Pennsylvanian, Late*
Missourian*
Virgilian*
Permian, Early*
Wolfcampian*
Leonardian*
Type section, locality, area and/or origin of name:
Type area: in area where the 3 constituent formations are exposed; between Bellevue, Blaine Co., ID, north to White Cloud Peaks, Custer Co., ID (Mahoney and others, 1991).
AAPG geologic province:
Idaho Mountains province*
Snake 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 ([ ]).