- Usage in publication:
-
- Kewaunee Formation
- Modifications:
-
- Named
- Dominant lithology:
-
- Till
- AAPG geologic province:
-
- Wisconsin arch
Summary:
The Kewaunee Formation is here named in the Lake Michigan and Green Bay Lobes in WI. In the Lake Michigan Lobe it is divided into the Ozaukee Member, overlain by the Haven, Valders, and Two Rivers Members. Members in the Green Bay Lobe east of the arbitrary vertical cut-off at the Fox River are the Branch River, Chilton, and Glenmore Members. West of the Fox River the Kewaunee is divided into the Silver Cliff, Kirby Lake, and Middle Inlet Members. Till of the Kewaunee is brown or reddish-brown, calcareous, sandy, silty, clay till. Overlies various members of the New Berlin and Oak Creek Formations in the Lake Michigan Lobe, and the Horicon Formation in the Green Bay Lobe. Lies at the surface over much of northeast WI. Equivalent to parts of the Wedron and Lake Michigan Formations in IL and younger parts of the Copper Falls Formation in northern WI. Thickness varies from less than 1 m to more than 18 m. Age is Pleistocene (late Wisconsinan).
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Kewaunee Formation
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Wisconsin arch
Summary:
Florence Member here named and assigned to Kewaunee Formation at its base. The Florence is a reddish-brown clayey till below the Silver Cliff Member in the Langlade Lobe. It is laterally gradational with informal member E.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 ([ ]).