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Usage:
Lost Branch Formation of Marmaton Group (IA,KS,MO,NE,OK)
Lost Branch Member of Holdenville Shale of Marmaton Group (OK)
Subunits:
FORMATION STATUS (alphabetical): Cooper Creek Limestone Member (IA,MO,NE), Sni Mills Limestone Member (IA,KS,MO,NE).
Geologic age:
Middle Pennsylvanian (Desmoinesian)
Type section, locality, area and/or origin of name:
Type locality and stratotype: excellent exposure in cutbank on west side of Lost Branch, near center NE/4 NE/4 NE/4 sec. 10, T. 33 S., R. 18 E., just southwest of Mound Valley, Mound Valley 7.5-min quadrangle, Labette Co., southeastern KS; composite stratotype with sections of higher strata from west highbank of Pumpkin Creek (as well as selected ravine and gullies) along east line of SW/4 SW/4 NE/4 sec. 10, T. 33 S.,R. 18 E., which are 1 mi (1.6 km) southwest of Mound Valley, Mound Valley 7.5-min quadrangle, Labette Co., southeastern KS. Origin of name not stated by author, but probably named from Lost Branch, a tributary of Pumpkin Creek (Heckel, 1991).
AAPG geologic province:
Cherokee basin
Chautauqua platform
Forest City basin
Iowa shelf
Nemaha anticline
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 ([ ]).