Usage:
No current usage.
(†Bouchard Formation (MT) replaced with Garnet Range Formation of Missoula Group of Belt Supergroup. See Garnet Range.)
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name:
Type section: in secs. 24 and 25, T. 16 N., R. 26 W., [Superior 15-min quadrangle], Mineral Co., northwestern MT. Named from exposures near Bouchard Lake, in sec. 23, T. 17 N., R. 27 W., St. Regis-Superior area, [Superior 15-min quadrangle], Mineral Co., northwestern MT (Campbell, 1960).
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 ([ ]).