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National Geologic Map Database

Geologic Unit: Wise Lake

Usage:

Wise Lake Formation of Galena Group (IL,IA)
Wise Lake Member of Galena Dolomite of Sinnipee Group (WI)


Subunits:

FORMATION STATUS: Rifle Hill Member.


Geologic age:

Late Ordovician (Cincinnatian; Edenian)


Type section, locality, area and/or origin of name:

Type section: north end of prominent bluff, 6 mi south of Galena, in center NE/4 sec. 21, T. 27 N., R. 1 E., [approx. Lat. 42 deg. 19 min. 24 sec. N., Long. 90 deg. 24 min. 00 sec. W., Galena 15-min quadrangle, 1939 ed.], Jo Daviess Co., northwestern IL (Templeton and Willman, 1963, Illinois Geol. Survey Bull., no. 89, p. 125; Willman and Buschbach, 1975, Illinois Geol. Survey Bull., no. 95, p. 47-87).
Named from Wise Lake, a lake on Mississippi River floodplain [now submerged], near type section (Templeton and Willman, 1963, p. 125; Willman and Buschbach, 1975).
Notable exposures in Dixon-Oregon area, northern IL (Templeton and Willman, 1952).


AAPG geologic province:

Iowa shelf
Wisconsin arch


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).