Usage:
Appistoki Member of Appekunny Formation of Ravalli Group of Belt Supergroup (MT-local)
Appistoki Member of Appekunny Argillite (MT-local)
Exposures in the U.S. confined to Glacier National Park and adjacent areas, Glacier Co., MT.
(†Appistoki Member abandoned by the Canada Geol. Survey and USGS. Shown to be equivalent to Appekuny Argillite of Willis (1902). See Appekuny.)
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name:
Type locality: Appistoki Peak, near Two Medicine Lake, Glacier National Park, northwestern MT (Fenton and Fenton, 1937).
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 ([ ]).