Usage:
Aldridge Formation of Purcell Supergroup (Canada)
(†Aldridge Formation not used by U.S. geologists. Rocks included in Altyn Limestone, Chamberlain Formation, Newland Limestone, Prichard Formation, or Waterton Formation; all of Belt Supergroup. See Altyn, Chamberlain, Newland, Prichard, and Waterton.)
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Notable exposures near Kingsgate, southeastern British Columbia (Schofield, 1914a, p. 221; CSPG Western Canada Lexicon).
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 ([ ]).