Usage:
Oneota Dolomite of Prairie du Chien Group (IL*,IN,IA*,MI*,MN*,WI*)
Oneota Dolomite of Knox Group (KY*, and IL*-notably in southern part)
Oneota Formation (WI)
Subunits:
(alphabetical): Arsenal Member (IL), Blodgett Member (IL), Blue Earth Beds (MN), Coon Valley Member (IA,MN,WI), Genoa Member (WI), Gunter Sandstone Membe (IL*), Hager City Member (IA,MN,WI), Hickory Ridge Member (WI), Kasota Beds (MN), Mound Ridge Member (WI), Stockton Hill Member (MN,WI), Stoddard Member (WI).
Geologic age:
Early Ordovician (Canadian; Ibexian; Tremadocian; Skullrockian)*
Type section, locality, area and/or origin of name:
Named from exposures on Oneota River [now Upper Iowa River], Allamakee Co., IA (McGee, 1891).
AAPG geologic province:
Illinois basin*
Iowa shelf*
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 ([ ]).