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National Geologic Map Database

Geologic Unit: Atoka

Usage:

Atoka Formation (AR*,OK*)
(See also Atokan Series.)


Subunits:

(alphabetical): [?] Barnett Hill Member (OK), Blackjack School Sandstone Member (OK*), Coody Sandstone Member (OK*), Dirty Creek Sandstone Member (OK*), Georges Fork Sandstone Member (OK*), Greenland Sandstone Member (AR*), Pope Chapel Sandstone Member (OK*), Trace Creek Member or Trace Creek Shale Member (AR), Webber Falls Sandstone Member (OK*).


Geologic age:

Middle Pennsylvanian (Atokan)*


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

Named from Atoka, Atoka Co., eastern OK, which is situated on outcrop of formation (Taff and Adams, 1900).


AAPG geologic province:

Arkoma basin*
Ouachita folded belt*
Chautauqua platform*


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 ([ ]).