Usage:
Dickeyville Bentonite Bed of Glenhaven Member of Guttenberg Formation of Galena Group (IL,WI)
Geologic age:
Late Ordovician (Mohawkian; Chatfieldian)
Type section, locality, area and/or origin of name:
Type section: Dickeyville northwest section, quarry and roadcuts along U.S. Highway 61, in NE/4 NE/4 SW/4 and S/2 NW/4 sec. 7, T. 2 N., R. 2 W., [approx. Lat. 42 deg. 39 min. 36 sec. N., Long. 90 deg. 39 min. 18 sec. W., Potosi 7.5-min quadrangle], Grant Co., south-central WI (Willman and Kolata, 1978).
Named from Dickeyville, [Dickeyville 7.5-min quadrangle], Grant Co., south-central WI, 6.5 km southeast of type section (Willman and Kolata, 1978).
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 ([ ]).