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National Geologic Map Database

Geologic Unit: Nacatoch

Usage:

Nacatoch Sand of Navarro Group (LA*,TX*)
Nacatoch Sand (AR*,LA*)


Geologic age:

Late Cretaceous (Campanian and/or Maastrichtian; Gulfian Provincial Epoch)*


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

Named from typical exposures at Nacatoch Bluff [local name] on Little Missouri River, [possibly located in sec. 1, T. 10 S., R. 22 W., Okolono South 7.5-min quadrangle], Clark Co., southwestern AR (Veatch, 1905).


AAPG geologic province:

Arkla basin*
East Texas basin*
Ouachita folded belt*


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 ([ ]).