Usage:
Apple Creek Formation of Lemhi Group (ID*)
Geologic age:
Mesoproterozoic*
Type section, locality, area and/or origin of name:
[Type area:] in vicinity of Apple Creek and along Hayden Creek, [in R. 23 E., T. 17 N., approx. Lat. 44 deg. 46 min. N., Long. 113 deg. 42 min., in southwestern part of Lemhi quadrangle, Salmon National Forest, Custer Co., east-central ID]. Named from Apple Creek, a tributary of Hayden Creek (Anderson, 1961).
Principal reference section: along crest of ridge between Golden Trout Lake and head of Middle Fork of Little Timber Creek, in T. 14 N., R. 24 E., Patterson quadrangle, Challis and Salmon National Forests, Lemhi Co., east-central ID (Ruppel, 1975).
AAPG geologic province:
Northern Rocky Mountain region*
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 ([ ]).