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National Geologic Map Database

Geologic Unit: Brazos River

Usage:

Brazos River Formation of Strawn Group (TX)
Originally called Brazos Sandstone.


Geologic age:

Middle Pennsylvanian (Desmoinesian)*


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

Named from widely distributed exposures along Brazos River, especially the high cliff at Inspiration Point, 8 mi due south of Mineral Wells, [Brazos River Valley area, Palo Pinto Co., central northern TX] (Plummer and Moore, 1922).


AAPG geologic province:

Bend arch*
Fort Worth syncline*


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 ([ ]).