Sugar Creek sandstone lentil (informal) of Tradewater Formation of Raccoon Creek Group (IL)
Informal. The rank or lithologic term should not be capitalized.
Pennsylvanian, Early
Morrowan
Not designated. Occurs along Ozark Creek, in SW/4 sec. 27, T. 11 S., R. 4 E., Creal Springs quadrangle, southeastern IL (Nelson and others, 1991).
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 ([ ]).