- Usage in publication:
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- DeLong coal member
- Modifications:
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- Original reference
- Dominant lithology:
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- Coal
- AAPG geologic province:
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- Illinois basin
Summary:
Pg. 33, 45 (table 1), 63, pl. 1. DeLong coal member of Spoon formation (new) of Kewanee group (new). Name applied to thin unit formerly designated as Upper DeLong coal. Stratigraphically above Brush coal member (new), formerly designated as Middle DeLong coal, and below Seahorne limestone member. Age is Pennsylvanian. Presentation of new rock-stratigraphic classification of Pennsylvanian of 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 DeLong about 1.5 mi northeast of type outcrop.
[Name spelled De Long in GNU records (USGS DDS-6).]
Source: US geologic names lexicon (USGS Bull. 1200, p. 1083).
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 ([ ]).