Usage:
No current usage.
(†Abingdon cyclothem (informal) (IL,IA) considered obsolete.)
Geologic age:
Middle Pennsylvanian (Desmoinesian)
Type section, locality, area and/or origin of name:
Notable exposures in tributaries of Brush Creek, especially 4 mi east of Abingdon, near center sec. 6, T. 9 N., R. 2 E., Knox Co., western IL (Weller and others, 1942).
AAPG geologic province:
Illinois basin
Iowa shelf
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 ([ ]).