Usage:
Avant Limestone Member of Iola Limestone of Ochelata Group (OK*)
Geologic age:
Late Pennsylvanian (Missourian)*
Type section, locality, area and/or origin of name:
Type locality: in T. 23 N. [R. 12 and 13 E.], Osage Co., northeastern OK (Oakes, 1952).
Named from the town of Avant, Osage Indian Reservation, Osage Co., northeastern OK (Ohern, 1910).
AAPG geologic province:
Chautauqua platform*
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 ([ ]).