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.)
Pennsylvanian
Named from Clear Creek, Brown Co., Colorado River region, central TX (US geologic names lexicons, USGS Bull. 896, 1200).
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).