Usage:
Horseshoe Basin Group (WA)
Subunits:
(alphabetical) --all in WA: Bowers Quartz Diorite, Cathedral Quartz Monzonite, Horseshoe Mountain Porphyritic Leuco Quartz Monzonite, Similkameen Subporphyritic Granodiorite, Edwards Slough Diorite, Goat Gabbro, and informal Anderson Creek granodiorite
Geologic age:
Early Cretaceous
Type section, locality, area and/or origin of name:
In T. 38 through 40 N., and R. 23 through 25 E., Okanogan Co., WA (Hibbard, 1971).
AAPG geologic province:
Northern Cascade Range-Okanagan 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 ([ ]).