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National Geologic Map Database

Geologic Unit: Navarro

Usage:

Navarro Group (LA*,TX*)
Navarro Formation (AL?,TX*)


Subunits:

GROUP STATUS (alphabetical): Arkadelphia Marl (LA,TX), Corsicana Formation (TX*) or Corsicana Marl (TX*), Escondido Formation (TX), Kemp Clay (TX*) or Kemp Formation (TX*), Nacatoch Sand (LA,TX*), Neylandville Marl (TX*), Olmos Formation (TX*), Saratoga Formation (LA).


Geologic age:

Late Cretaceous (Campanian to Maastrichtian; Gulfian Provincial Epoch)*


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

Named from development in Navarro Co., eastern TX (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

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 ([ ]).