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National Geologic Map Database

Geologic Unit: Osage Springs

Usage:

Osage Springs Member of Lithograph City Formation of Cedar Valley Group (IA,MN)


Geologic age:

late Middle to early Late Devonian (Givetian to Frasnian)


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

Roadcut along County Road T38, in SE/4 SE/4 SE/4 sec. 35, T. 98 N., R. 17 W., 3.9 km downstream from Osage Springs County Park, Mitchell Co., IA (Bunker and others, 1986; Witzke and others, 1988).


AAPG geologic province:

Iowa shelf


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 ([ ]).