Morton Gneiss (MN*)
Morton Gneiss of Minnesota Valley Group (MN)
Precambrian
Archean, Early
Archean, Middle
Archean, Late
Type locality not stated. Named from occurrence in vicinity of Morton, Renville Co., southwestern MN. Extends from near New Ulm, Brown Co., to a point south of Sacred Heart, Renville Co., a distance of about 50 mi (Thiel and Dutton, 1935).
Lake Superior 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 ([ ]).