Usage:
Siamo Slate of Menominee Group of Marquette Range Supergroup (MI*-local)
Notable exposures in Marquette Range, Northern Peninsula.
Subunits:
Goose Lake Member (MI*).
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Exposures on Siamo Hills [not shown on modern topographic map], south of the west end of Teal Lake in area southwest of Marquette, in sec. 35, T. 48 N., R. 27 W., Northern Peninsula, northwestern MI (Van Hise and Bayley, 1895; Gair and Thaden, 1968).
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 ([ ]).