Usage:
Carbondale Formation (IL*,IN*,KY*)
Carbondale Group (IN*)
Subunits:
GROUP STATUS (alphabetical) --all in IN*: Dugger Formation, Linton Formation, Petersburg Formation.
FORMATION STATUS (alphabetical) all in KY*: Bankston Fork Limestone Member, Briar Hill Coal Member, Dekoven Coal Member, Sebree Sandstone Member.
FORMATION STATUS (alphabetical) all in IL*: Allenby Coal Member, Anna Shale Member, Anvil Rocks Sandstone Member, Bankston Fork Limestone Member, Big Creek Shale Member, Breezy Hill Limestone Member, Brereton Limestone Member, Briar Hill Coal Member, Canton Shale Member, Cardiff Coal Member, Colchester Coal Member, Conant Limestone Member, Copperas Creek Sandstone Member, Covel Conglomerate Member, /Davis Coal Member, Dekoven Coal Member, Dykersburg Shale Member, Energy Shale Member, Excello Shale Member, Francis Creek Shale Member, Galum Limestone Member, Gilchrist Shale [Member], Hanover Limestone Member, Herrin Coal Member, Houchin Creek Coal Member, Jake Creek Sandstone Member, Jamestown Coal Member, Kerton Creek Coal Member, Lawson Shale Member, Lowell Coal Member, Mecca Quarry Shale Member, Oak Grove Limestone Member, Palzo Sandstone Member, Pleasantview Sandstone Member, Pokeberry Limestone Member, Purington Shale Member, Roodhouse Coal Member, Seelyville Coal Member, Shawneetown Coal Member, Spring Lake Coal Member, /Springfield Coal Member, St. David Limestone Member, Summum Coal Member, Survant Coal Member, Turner Mine Shale Member, Vermilionville Sandstone Lentil* or Vermilionville Sandstone Member.
Geologic age:
Middle Pennsylvanian (Moscovian; Westphalian; Desmoinesian)*
Type section, locality, area and/or origin of name:
Named from Carbondale, Jackson Co., southern IL (Lines, 1912).
Type section [composite]: exposures in SE/4 NE/4 sec. 1, T. 7 N., R. 4 E., Glasford quadrangle, and in NW/4 NE/4 NW/4 sec. 20 and SW corner sec. 21, T. 8 N., R. 3 E., Canton quadrangle, Fulton Co., northwestern IL (Kosanke and others, 1960).
AAPG geologic province:
Illinois basin*
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 ([ ]).