Usage:
Holdenville Shale of Marmaton Group (KS*,MO*,OK*)
Holdenville Formation of Marmaton Group (MO*,OK*)
/Holdenville subgroup [informal] of Marmaton Group (MO)
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Subgroup considered informal and should not be capitalized.]
Subunits:
FORMATION STATUS (alphabetical) --all in OK: Eleventh Street Limestone Member, Homer Limestone Member, Lost Branch Member, Memorial Shale Member, Sasakwa Limestone Member.
/SUBGROUP STATUS (alphabetical) --all in MO: Lenapah Formation, Lost Branch Formation, Memorial Shale, Nowata Shale.
Geologic age:
Middle Pennsylvanian (Desmoinesian)*
Type section, locality, area and/or origin of name:
Named from Holdenville, which is located on the shale, in Hughes Co., central OK (Taff, 1901).
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 ([ ]).