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National Geologic Map Database

Geologic Unit: McCormick

Usage:

No current usage.
(Rocks of †McCormick Group (IL*) reallocated to Raccoon Creek Group. See Raccoon Creek.)


Subunits:

(alphabetical; of Kosanke and others, 1960) --all in IL: Abbott Formation, Caseyville Formation, Tradewater Formation.


Geologic age:

Pennsylvanian, Middle*


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

Vicinity of McCormick, northwestern part of Pope Co., IL (Kosanke and others, 1960).


AAPG geologic province:

Illinois basin*


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 ([ ]).