Usage:
Dugger Formation of Carbondale Group (IN*)
Subunits:
(alphabetical) --all in IN*: Alum Cave Limestone Member, Antioch Limestone Member, Anvil Rock Sandstone Member, Bridge Junction Sandstone Member, Bucktown Coal Member, Danville Coal Member, Herrin Coal Member, Hymera Coal Member, Providence Limestone Member, Universal Limestone Member.
Geologic age:
Middle Pennsylvanian (Moscovian; Westphalian; Desmoinesian)*
Type section, locality, area and/or origin of name:
Named from exposures in secs. 31 and 32, T. 8 N., R. 7 W., and in secs. 5 and 6, T. 7 N., R. 7 W., 2 mi northeast of Dugger, Sullivan Co., southeastern IN (Wier, 1950).
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 ([ ]).