Usage:
Missouri Ridge Formation of Windermere Group (ID*)
Missouri Ridge Formation of Windermere Supergroup (ID*)
Windermere Group is preferred usage of the USGS.
Geologic age:
Neoproterozoic*
Type section, locality, area and/or origin of name:
Type section: exposures on Missouri Ridge in northern Stibnite roof pendant, northwest corner Stibnite 7.5-min quadrangle, [Payette National Forest], west-central ID (Lund, 2004, fig. A6, loc. 5).
Named from Missouri Ridge, [in S/2 sec. 9, T. 19 N., R. 9E., approx. Lat. 44 deg. 59 min. 45 sec. N., Long. 115 deg. 21 min. 56 sec. W.], northwest corner Stibnite 7.5-min quadrangle, [Payette National Forest], west-central ID (Lund, 2004).
AAPG geologic province:
Idaho Mountains province*
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 ([ ]).