Usage:
Neda Formation (MI*,WI*)
Neda Formation of Maquoketa Group (IL)
Neda Member of Maquoketa Shale (IA*,WI*)
Geologic age:
Late Ordovician*
Type section, locality, area and/or origin of name:
Named from exposures in ore pit near Neda, Dodge Co., southeastern WI (Savage and Ross, 1916).
AAPG geologic province:
Wisconsin arch*
Iowa shelf*
Illinois basin
Michigan basin
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 ([ ]).