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National Geologic Map Database

Geologic Unit: Barnett

Usage:

Barnett Shale (TX*)
Barnett Formation (TX*)


Geologic age:

Mississippian*


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

Named from Barnett Springs, about 5 mi east of San Saba [San Saba Co.], mineral region, central TX, near which is a "typical exposure" (Plummer and Moore, 1922).


AAPG geologic province:

Llano uplift*


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).