No current usage.
(†Lupine Quartzite (MT) abandoned in favor of Bonner Quartzite of Missoula Group of Belt Supergroup. See Bonner.)
Mesoproterozoic
Type section: west side Blacktail Mountain, in sec. 34, T. 17 N., R. 27 W., and sec. 4, T. 16 N., R. 27 W. for lower 2,750 ft; and in sec. 18, T. 16 N., R. 26 W., for upper 300 ft, Mineral Co., MT (Campbell, 1960).
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 ([ ]).