Usage:
Appekunny Formation of Ravalli Group of Belt Supergroup (MT*-local)
Appekunny Formation of Belt Supergroup (MT-local)
Exposures in the U.S. confined to Glacier National Park and adjacent areas, Glacier Co., MT.
Subunits:
(alphabetical) --all in MT: Appistoki Member, Rising Wolf Member, Scenic Point Member, Singleshot Member.
Geologic age:
Mesoproterozoic*
Type section, locality, area and/or origin of name:
Notable exposures on northeast spur of Appekunny Mountain, north of Swift Current Valley, Glacier National Park, Glacier Co., northwestern MT, but also well exposed in cliffs throughout Lewis and Livingston Ranges (Willis, 1902).
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 ([ ]).