- Usage in publication:
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- Hermon cyclothem
- Modifications:
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- Original reference
- AAPG geologic province:
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- Illinois basin
Summary:
Pg. 42, 52 (table 1), pl. 1. Hermon cyclothem in Spoon Formation (new) of Kewanee Group (new). Name applied to cyclothem formerly called Lower DeLong. In sequence, occurs above Seville cyclothem and below Seahorne cyclothem. Age is Pennsylvanian. Presentation of new rock-stratigraphic classification of Pennsylvanian in Illinois. Cyclical classification is 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. 1742).
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 ([ ]).