Usage:
Excello Shale Member of Fort Scott Limestone of Marmaton Group (KS,OK)
Excello Shale Member of Mouse Creek Formation of Marmaton Group (IA)
Excello Shale Member of Cabaniss Formation of Cherokee Group (KS)
Excello Shale Member of Senora Formation of Cabaniss Group (OK)
Excello Shale Member of Carbondale Formation (IL)
Excello Shale of /Fort Scott subgroup [informal] of Marmaton Group (MO)
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Fort Scott subgroup considered informal and should not be capitalized.]
Geologic age:
Middle Pennsylvanian (Desmoinesian)
Type section, locality, area and/or origin of name:
Type section: in NW/4 sec. 30, T. 56 N., R. 14 W., 2.6 mi west of U.S. Highway 63, west of Excello, Macon Co., MO, in highwall of coal strip pit (Searight, 1953).
AAPG geologic province:
Iowa shelf
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 ([ ]).