Usage:
McGrath Gneiss (MN)
Geologic age:
Precambrian
Archean, Middle(?)
Archean, Late
Type section, locality, area and/or origin of name:
Exposures 3 km southwest of village of McGrath, in sec. 17, T. 43 N., R. 24 W., Aitkin Co., east-central MN (Morey, 1978).
AAPG geologic province:
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 ([ ]).