No current usage.
(Rocks of †Henrietta Formation (IA,KS,MO,NE) or †Henrietta Group (IA,KS,MO,NE) replaced with Marmaton Group. See Marmaton.)
Middle Pennsylvanian (Desmoinesian)
Named from Henrietta escarpment, near Henrietta, Johnson Co., western MO (Keyes, 1897).
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 ([ ]).