Usage:
Lodi Member of St. Lawrence Formation (MN*)
Lodi Member of Trempealeau Formation (MI*,WI*,IA*)
Lodi Shale Member of St. Lawrence Formation (IA*,WI*)
Geologic age:
Late Cambrian*
Type section, locality, area and/or origin of name:
Presumably named from exposures at or near Lodi, Columbia Co., WI. [According to Junemann (1951) Loddes Mill Bluff, southeastern Sauk Co., is appropriate type section, as it was previously labeled Lodi Mill Bluff on USGS topographic map and unit is well exposed there.]
AAPG geologic province:
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 ([ ]).