- Usage in publication:
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- Piasa limestone
- Modifications:
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- Original reference
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Illinois basin
Culver, H.E., 1925, Coal resources of district III (western Illinois): Illinois Geological Survey Cooperative Mining Series Bulletin, no. 29, 128 p.
Summary:
Pg. 20. Piasa limestone. In southern part of district III are one or more limestones in McLeansboro formation which can be traced considerable distances. The most important of these are Piasa limestone, named for Piasa Creek, on which it is most excellently exposed, and Golden Eagle limestone, well known in Calhoun County, southwestern Illinois. These beds are of considerable value in stratigraphic work, since they constitute horizon markers which can be positively identified over relatively large areas. [Position within McLeansboro formation not defined.] Age is Pennsylvanian.
[Piasa Creek runs through southeast corner of Jersey Co., southwest corner of Macoupin Co., and northwest corner of Madison Co., southwestern IL.]
Source: US geologic names lexicon (USGS Bull. 896, p. 1651).
- Usage in publication:
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- Piasa limestone
- Modifications:
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- Areal extent
- AAPG geologic province:
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- Illinois basin
Summary:
Pg. 129-138. Piasa limestone. Overlies coal No. 7 and is 5 to 6 feet thick in places in Jersey County, southwestern Illinois. Is older than Lonsdale limestone. Age is Pennsylvanian.
Source: US geologic names lexicon (USGS Bull. 896, p. 1651).
- Usage in publication:
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- Piasa limestone
- Modifications:
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- Areal extent
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Illinois basin
Summary:
Pg. 21 (table), 30-31. Piasa limestone. Included in Sparland cyclothem, McLeansboro group. Overlies Danville (No. 7) coal; underlies unnamed shales. [Age is Pennsylvanian.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 3005).
- Usage in publication:
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- Piasa limestone member
- Modifications:
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- Principal reference
- Revised
- AAPG geologic province:
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- Illinois basin
Summary:
Pg. 37, 48 (table 1), pl. 1. Piasa limestone member of Modesto formation. Rank reduced to member status in Modesto formation (new). In southeastern area, occurs below DeGraff coal member (new); in southwestern area occurs below Rock Branch coal member (new). Piasa limestone, DeGraff coal, Pond Creek coal, and Lake Creek coal members may be included in complex West Franklin limestone member in eastern part of area. Age is Pennsylvanian. Presentation of new rock-stratigraphic classification of Pennsylvanian strata in Illinois. Cyclical classification is retained but is entirely independent of rock-stratigraphic classification.
Type locality: along Piasa Creek, west of village of Piasa, in E/2 sec. 25, T. 8 N., R. 10 W., Brighton 15-min quadrangle, Jersey Co., southwestern IL (Wanless, 1956, Illinois Geol. Survey Circ., no. 217, p. 11, table of type localities).
Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 3005).
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 ([ ]).