Usage:
Wisconsinan Stage of Pleistocene Series of Quaternary System*
Wisconsinan Age of Pleistocene Epoch of Quaternary Period*
Applied to time during which glacial-related sediments were deposited.
Subunits:
(ascending): Altonian*, Farmdalian*, Woodfordian*, Twocreekan*, and Valderan* Substages (Subages).
Geologic age:
Quaternary (Pleistocene)*
Type section, locality, area and/or origin of name:
Type area: central IL to Door Peninsula, WI (Frye and others, 1968).
AAPG geologic province:
North America*
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 ([ ]).