Usage:
Cooperton Formation of /Wichita Granite Group (OK-recognized locally in western Wichita igneous province, Wichita Mountains area)
[Wichita Granite Group preempted by Wichita [Group] by Cummins (1890) in TX; a group name combines a geographic name with the term "group," and no lithic designation is included (ACSN, 1961, 1970; NACSN, 1983, 2005, 2021).]
Geologic age:
Middle Cambrian
Type section, locality, area and/or origin of name:
Named from town of Cooperton, Kiowa Co., OK (Myers and others, 1981, who credit Hull, 1951, unpub. thesis).
AAPG geologic province:
South Oklahoma folded belt
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 ([ ]).