Usage:
Mulky Coal Member of Swede Hollow Formation of Cherokee Group (IA)
Mulky coal bed (informal) of Cabaniss Formation of Cherokee Group (KS)
Mulky coal bed (informal) of Senora Formation of Cabaniss Group (OK)
Mulky coal bed (informal) of /Mulky Formation of /Cabaniss subgroup [informal] of Cherokee Group (MO)
For informal usage, the rank or lithologic term should not be capitalized. [Mulky Formation preempted by Mulky coal bed; an identical geographic name may not be applied to a stratigraphic unit [Mulky Formation] and its parts [Mulky coal bed] (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). "Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Cabaniss subgroup considered informal and should not be capitalized.]
Geologic age:
Middle Pennsylvanian (Desmoinesian)
Type section, locality, area and/or origin of name:
Named by Broadhead (1873, Preliminary report on the iron ores and coal fields from field work of 1872: Missouri Geol. Survey) from Mulky Creek, Johnson Co., MO [see US geologic names lexicon, USGS Bull. 1200, p. 2655].
AAPG geologic province:
Chautauqua platform
Cherokee basin
Forest City basin
Iowa shelf
Lincoln anticline
Ozark uplift
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 ([ ]).