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National Geologic Map Database

Geologic Unit: Seminole

Usage:

Seminole Formation of Skiatook Group (OK*)
Seminole Sandstone Member of Coffeyville Formation of Skiatook Group (OK)
Seminole Formation of Pleasanton Group (KS,MO)


Subunits:

Hepler Sandstone Member, South Mound Shale Member (Jewett and others, 1965, in KS).


Geologic age:

Late Pennsylvanian (Missourian)*


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

Named from the Seminole [Indian] Nation, OK, the typical area being in the northwest corner of Coalgate quadrangle, near edge of Seminole [Indian] Nation, Hughes Co., OK (US geologic names lexicon, USGS Bull. 896).
Type locality: southeast part of Seminole [Indian] Nation, now Seminole Co. (probably T. 6 N., R. 7 and 8 E.) (Oakes, 1940).


AAPG geologic province:

Chautauqua platform*
Forest City basin*
Arkoma 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 ([ ]).