Usage:
[?] Lake Creek Coal Member of Shelburn Formation of McLeansboro Group (IL-recognized locally in subsurface)
Geologic age:
Pennsylvanian
Type section, locality, area and/or origin of name:
Type section (subsurface): depth 86.5 feet, Consolidated Coal Company No. 91 drillhole, in SW/4 NE/4 NE/4 sec. 21, T. 8 S., R. 3 E., Williamson Co., southeastern IL. Named from Lake Creek Twp. in which drillhole is located (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 ([ ]).