Usage:
Hiawatha Graywacke of Paint River Group of Marquette Range Supergroup (recognized locally in MI*,WI)
Notable exposures in Iron River-Crystal Falls district, Northern Peninsula.
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Named from Hiawatha iron mine at Iron River, Iron Co., Northern Peninsula, northwestern MI (Lake Superior region). Rocks are exposed in scattered outcrops and formation is crossed by extensive mine workings. Locally well exposed along course of Paint River at north edge of town of Crystal Falls (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 ([ ]).