Usage:
Coon Valley Member of Jordan Formation (IA,MN,WI)
Coon Valley Member of Jordan Sandstone (MN)
Coon Valley Member of Oneota Formation (IA,MN,WI)
Geologic age:
Early Ordovician
Type section, locality, area and/or origin of name:
Type section: south side of U.S. Highway 14, 3.2 km west of town of Coon Valley, NW/4 NE/4 sec. 11, T. 14 N., R. 6 W., Vernon Co., WI (Odom and Ostrom, 1978).
AAPG geologic province:
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 ([ ]).