- Usage in publication:
-
- Kewanee group*
- Modifications:
-
- Original reference
- Dominant lithology:
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- Sandstone
- Shale
- Limestone
- Coal
- AAPG geologic province:
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- Illinois basin
Summary:
Pg. 8 (fig. 1), 26 (fig. 4), 31-36, 45-46 (table 1), pl. 1, geol. Sections. Kewanee group. Middle group of Pennsylvanian formations. Comprises Spoon (new) and Carbondale formations. Overlies McCormick group (new); underlies McLeansboro group. Characterized by widespread development of minable coals. Sandstones compose about 25 percent of group. Limestones commonly 1 to 5 feet thick. Age is Middle Pennsylvanian. Presentation of new rock-stratigraphic classification of Pennsylvanian in Illinois. Cyclical classification is retained but is independent of rock-stratigraphic classification.
Type locality: vicinity of Kewanee, Henry Co., IL.
Source: US geologic names lexicon (USGS Bull. 1200, p. 2000).
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 ([ ]).