Usage:
Mount Nelson Formation of Purcell Supergroup (Canada)
Uncertain if this unit extends into the U.S. (Purcell Supergroup of Canada = Belt Supergroup of U.S.).
Geologic age:
late Precambrian
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Not designated. Named from Mount Nelson, Lat. 50 deg. 27 min. N., Long. 116 deg. 23 min. W., British Columbia, Canada (Walker, 1926).
AAPG geologic province:
not stated
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 ([ ]).