No current usage.
(†Milburn Shale (TX) replaced with Canyon Group. See Canyon.)
Pennsylvanian
Named from town of Milburn, McCulloch Co., central TX, where well exposed (Tarr, 1890).
Llano uplift
Bend arch
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 ([ ]).