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National Geologic Map Database

Geologic Unit: Clear Creek

Usage:

No current usage.
(†Clear Creek Limestone Member of Graford Formation of Canyon Group (TX) replaced with Placid Shale Member of Brad Formation of Canyon Group. See Placid.)


Geologic age:

Pennsylvanian


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

Named from Clear Creek, Brown Co., Colorado River region, central TX (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

Bend arch
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 ([ ]).