Usage:
Readstown Member of St. Peter Sandstone (WI,IA)
Readstown Member of St. Peter Formation (WI)
Geologic age:
Middle to Late Ordovician (Whiterockian)
Type section, locality, area and/or origin of name:
Named from exposures in vicinity of Readstown, notably the one on east side of Highway 14 and west of the village in center NE/4 sec. 27, T. 12 N., R. 4 W., Vernon Co., southwestern WI (Ostrom, 1967).
AAPG geologic province:
Iowa shelf
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 ([ ]).