Usage:
Virginia Formation of the Animikie Group (MN*)
Subunits:
South Range Member (MN-local).
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Named because in its typical form it has been found in numerous test pits and drill holes west of town of Virginia, St. Louis Co., Mesabi mining district, northeastern MN (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 ([ ]).