Usage:
Marmaton Group (IA*,KS*,MO*,NE,OK*,TX, and CO*-subsurface)
Marmaton Formation (CO-subsurface)
Subunits:
GROUP STATUS (alphabetical): Altamont Formation (MO) or Altamont Limestone (IA,KS*,MO*,OK*), Bandera Formation (MO) or Bandera Shale (IA,KS*,MO*,OK), Blackjack Creek Formation (MO), Calvin Sandstone (OK*), Cooper Creek (IA,MO), Fort Scott Limestone (KS*,MO*,OK*), Higginsville Formation (MO), Holdenville Formation (MO,OK) or Holdenville Shale (KS*,MO*,OK*), Labette Formation (MO,OK) or Labette Shale (IA,KS*,MO*,OK*), Lenapah Formation (MO) or Lenapah Limestone (IA,KS*,MO*,OK*), Little Osage Formation (MO), Lost Branch Formation (IA,KS,MO,NE,OK), Memorial Shale (IA,KS,MO,NE,OK), Morgan School Shale (IA), Mouse Creek Formation (IA), Nowata Formation (MO,OK) or Nowata Shale (IA,KS*,MO*,NE,OK*), Oologah Formation (OK) or Oologah Limestone (OK*), Pawnee Formation (MO) or Pawnee Limestone (IA,KS*,MO*,OK), Stephens Forest Formation (IA), Wetumka Shale (OK*), Wewoka Formation (OK*).
Geologic age:
Middle Pennsylvanian (Desmoinesian)*
Type section, locality, area and/or origin of name:
Not synopsized to date.
AAPG geologic province:
Anadarko basin*
Cherokee basin*
Forest City basin
Chautauqua platform*
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 ([ ]).