Usage:
Drury Member of Caseyville Formation (IL)
Drury Shale Member of Caseyville Formation (IL)
Subunits:
Informal Dutchman Creek sandstone lentil (IL)
Geologic age:
Early to Middle Pennsylvanian (Morrowan)
Type section, locality, area and/or origin of name:
Along Drury Creek, in secs. 33 and 34, T. 10 S., R. 1 W., Carbondale quadrangle, Jackson Co., southwestern IL. Named from excellent exposures along Drury Creek, particularly in bluffs south of Makanda (Lamar, 1925).
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 ([ ]).