No current usage.
(Rocks of †Hardesty Shale (KS,MO,NE) reallocated to Stranger Formation of Douglas Group. See Stranger.)
Pennsylvanian, Late
Not designated. Origin of name not stated by author (Moore, 1932).
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 ([ ]).