U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Farmington

Usage:

[?] Farmington Shale Member of Shelburn Formation of McLeansboro Group (IL-local)


Geologic age:

Pennsylvanian


Type section, locality, area and/or origin of name:

Type locality: in Farmington Twp., in T. 8 N., R. 4 E., Fulton Co., IL (Wanless, 1957).


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 ([ ]).