No current usage?
(†Agate Bay Group (MN) considered abandoned? Uncertain if used by the MN Geol. Survey. Abandoned by the USGS.)
Precambrian
Notable exposures on Agate Bay, northeast of Duluth, St. Louis Co., northeastern MN (Irving, 1883).
Lake Superior region
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 ([ ]).