Usage:
No current usage.
(†Effingham cyclothem (informal) (IL) considered obsolete.)
Geologic age:
Pennsylvanian
Type section, locality, area and/or origin of name:
Type locality and origin of name not given. However, type locality of Effingham beds is in sec. 33, T. 8 N., R. 6 E., on tributary to Salt Creek 0.5 mi south of Effingham, Effingham Co., southeastern IL (US geologic names lexicon, USGS Bull. 1200).
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 ([ ]).