Usage:
Cummingsville Formation of Galena Group (MN)
Cummingsville Member of Galena Dolomite (IA)
Geologic age:
Late Ordovician (Mohawkian; Chatfieldian)
Type section, locality, area and/or origin of name:
Type section: 0.5 mi north of Cummingsville, on east edge of SE/4 sec. 21, T. 105 N., R. 12 W. Named from hamlet of Cummingsville, Olmsted Co., MN, on State Highway 30, 3.5 mi west of Chatfield, MN (Weiss, 1955).
AAPG geologic province:
Iowa shelf
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 ([ ]).