Usage:
Oakley Shale Member of Swede Hollow Formation of Cherokee Group (IA)
Oakley Shale Member of Verdigris Formation of /Cabaniss subgroup [informal] of Cherokee Group (MO)
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Sacfox 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 secs. 33 and 34, T. 73 N., R. 22 W., Lucas Co., IA (Ravn and others, 1984).
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 ([ ]).