Usage:
Perry Farm Shale Member of Lenapah Limestone of Marmaton Group (KS*,MO*,OK*)
Perry Farm Shale Member of Memorial Shale of Marmaton Group (KS)
Perry Farm Member of Lenapah Shale of /Appanoose subgroup [informal] of Marmaton Group (MO)
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Appanoose subgroup considered informal and should not be capitalized.]
Geologic age:
Middle Pennsylvanian (Desmoinesian)*
Type section, locality, area and/or origin of name:
Type exposure: in NW/4 NE/4 sec. 7, T. 34 S., R. 18 E., Labette Co., KS (Jewett, 1941).
AAPG geologic province:
Cherokee 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 ([ ]).