Usage:
Biwabik Iron-Formation of Animikie Group (MN*)
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Named from Biwabik Mine, one of earliest and largest mines located on formation, Mesabi district, northeastern MN. Biwabik is Chippewa word for piece or fragment of iron (Van Hise and Leith, 1901).
AAPG geologic province:
Lake Superior region*
Sioux uplift*
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 ([ ]).