Usage:
No current usage.
(Rocks of †Spoon Formation (IL*,IN*,KY*) reallocated to Carbondale and Tradewater Formations (IL*,KY*) and Linton and Staunton Formations (IN*). See Carbondale, Linton, Staunton, and Tradewater.)
Geologic age:
Middle Pennsylvanian (Atokan to Desmoinesian)
Type section, locality, area and/or origin of name:
Type locality: Toledo, Peoria, and Western RR cut about 0.25 mi west of Spoon River, in [E/2] sec. 22, T. 6 N., R. 1 E., [western edge Smithfield 7.5-min quadrangle], Fulton Co., west-central 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 ([ ]).