Pg. 262. Herrin limestone in McLeansboro formation. The limestone cap rock of Herrin No. 6 coal, which I shall call the Herrin limestone, since it is so commonly associated with Herrin coal, is an impure, earthy dark-gray, dirty-looking limestone that breaks with splintery fracture. Where exposed along streams it spalls off in angular fragments showing little structure. Contains fossils. Age is Pennsylvanian.
Present in Saline Co., southern IL.
Source: US geologic names lexicon (USGS Bull. 896, p. 946).
Herrin limestone member of McLeansboro formation. Authors show 2.5 feet of shale between Herrin limestone member and Herrin coal in parts of Perry County, southwestern Illinois, and give thickness of Herrin limestone as 4.5 to 6 feet. Age is Pennsylvanian.
Source: US geologic names lexicon (USGS Bull. 896, p. 946).
Pg. 27, 44. Herrin limestone of Carbondale group. Included in Brereton cyclothem, Carbondale group. Overlies Herrin No. 6 coal. Age is Pennsylvanian. Present in southern Illinois.
Source: US geologic names lexicon (USGS Bull. 1200, p. 1745-1746).
Pg. 35. †Herrin limestone in Carbondale formation. The name Brereton limestone member of Carbondale formation of Kewanee group (new) is extended to the caprock limestone of No. 6 coal in southern Illinois to replace the name Herrin, now restricted to the Herrin (No. 6) coal member.
Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 1745-1746).
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 ([ ]).