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National Geologic Map Database

Geologic Unit: Iowa Point

Usage:

Iowa Point Shale Member of Topeka Limestone of Shawnee Group (KS*)
Iowa Point Shale Member of Topeka Formation of Shawnee Group (IA*,MO*,NE*)


Geologic age:

Late Pennsylvanian (Virgilian)*


Type section, locality, area and/or origin of name:

Type exposure: in Missouri River bluff just east of Iowa Point, Doniphan Co., KS (Condra, 1927).


AAPG geologic province:

Forest City basin*
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 ([ ]).