Usage:
Black Earth Dolomite Member of St. Lawrence Formation (WI*)
Black Earth Member of St. Lawrence Formation (IA,MN*,WI*)
Geologic age:
Late Cambrian*
Type section, locality, area and/or origin of name:
Notable exposures west of Madison in hills bordering valley of Black Earth Creek, between Black Earth and Mazomanie, Dane Co., WI (Ulrich, 1916).
AAPG geologic province:
Iowa shelf*
Michigan basin*
Sioux uplift*
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 ([ ]).