Usage:
Dickinson Group (MI*)
Subunits:
(alphabetical) --all in MI*: East Branch Arkose, Six-Mile Lake Amphibolite, Solberg Schist.
Geologic age:
Late Archean*
Type section, locality, area and/or origin of name:
Named from Dickinson Co., where group occurs in an easterly trending belt about 4 mi wide in central part of T. 42 N., R. 28, 29, and 30 W., Northern Peninsula, northwestern MI (James, 1958).
AAPG geologic province:
Lake Superior region*
Wisconsin arch*
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 ([ ]).