Usage:
Basin Gulch Quartzite Member of Phi Kappa Formation (ID*)
Geologic age:
Early Ordovician*
Type section, locality, area and/or origin of name:
Type locality: exposures northwest of junction of Basin Gulch and Trail Creek, near east edge of Rock Roll Canyon quadrangle, Blaine Co., ID. Named from Basin Gulch, in northern Pioneer Mountains (Dover and others, 1980).
AAPG geologic province:
Snake River basin*
Idaho Mountains 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 ([ ]).