- Usage in publication:
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- Hermon coal member
- Modifications:
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- Original reference
- AAPG geologic province:
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- Illinois basin
Summary:
Pg. 33, 45 (table 1), 63, pl. 1. Hermon coal member of Spoon formation (new) of Kewanee group (new). Name applied to thin unit formerly termed Lower DeLong coal in western Illinois. Stratigraphically above Seville limestone member and below Brush coal member which name replaces unit formerly termed Middle DeLong coal. Age is Pennsylvanian. Presentation of new rock-stratigraphic classification of Pennsylvanian in Illinois. Cyclical classification is retained but is entirely independent of rock-stratigraphic classification.
Type locality: along Brush Creek, in secs. 6 and 8, T. 9 N., R. 2 E., Knox Co., western IL. Named from village of Hermon about 2.5 mi south of type outcrop.
Source: US geologic names lexicon (USGS Bull. 1200, p. 1741).
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 ([ ]).