Usage:
Creston Quartzite of Belt Supergroup (ID,MT,Canada)
Creston Formation of Belt Supergroup (ID,MT,Canada)
(Belt Supergroup of U.S. = Purcell Supergroup of Canada).
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Named from station on the Canadian Pacific RR, in Kootenay Province, southeast part of British Columbia, Canada. Occurs at International boundary, 49th Parallel, in section from Port Hill, ID, to Gateway, MT (Daly, 1905, 1913).
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 ([ ]).