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 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 ([ ]).