Usage:
Mound City Shale Member of Hertha Formation of /Bronson subgroup [informal] of Kansas City Group (KS,MO)
Mound City Shale Member of Hertha Limestone of Bronson Group (IA)
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Bronson subgroup considered informal and should not be capitalized.]
Geologic age:
Late Pennsylvanian (Missourian)
Type section, locality, area and/or origin of name:
Not designated (Jewett, 1932).
AAPG geologic province:
Forest City 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 ([ ]).