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National Geologic Map Database

Geologic Unit: Pedernales

Usage:

No current usage.
(Rocks of †Pedernales Dolomite Member of Wilberns Formation (TX*) reallocated to San Saba Member of Wilberns Formation of Moore Hollow Group. See San Saba.)


Geologic age:

Early Cambrian*


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

Type section: along Pedernales River from 1.5 to 3 mi up stream from bridge on Johnson City-Marble Falls Highway, 1 mi north of Johnson City, Blanco Co., central TX (Bridge and others, 1947).


AAPG geologic province:

Llano uplift*


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 ([ ]).