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National Geologic Map Database

Geologic Unit: Friedrich

Usage:

Friedrich Shale Member of Root Shale of Wabaunsee Group (KS*,NE*)
Friedrich Shale Member of Root Formation of Wabaunsee Group (IA)
Friedrich Shale Member of Root Shale of Vanoss Group (OK)
Friedrich Shale Member of Root Shale of /Richardson subgroup [informal] of Wabaunsee Group (KS)

["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). Richardson subgroup considered informal and should not be capitalized.]


Subunits:

FORMATION STATUS (alphabetical) --all in KS,NE: Minersville Member, Otoe Member, Palmyra Limestone Member.


Geologic age:

Late Pennsylvanian (Virgilian)*


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

Friedrich Creek, in sec. 6, T. 22 S., R. 11 E., Greenwood Co., eastern KS (Moore, 1936).


AAPG geologic province:

Cherokee basin*
Forest City basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).