- Usage in publication:
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- Loudon Coal Member
- Modifications:
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- Named
- Dominant lithology:
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- Coal
- AAPG geologic province:
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- Illinois basin
Summary:
The Loudon Coal Member of the Mattoon Formation of the McLeansboro Group is here named in Fayette County, IL. It is a coal bed lying 30 to 40 ft above the Millersville Limestone Member of the Bond Formation and 25 to 40 ft below the Oconee Coal Member of the Mattoon Formation. It is tentatively correlated with the Belle Rive Coal Member of the Mattoon to the south in Jefferson County. Thickness at type section is 15 in. Age is Late Pennsylvanian (Missourian).
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 ([ ]).