No current usage.
(Rocks of †Hog Creek Shale Member of Caddo Creek Formation of Canyon Group (TX) reallocated to Colony Creek Shale of Canyon Group. See Colony Creek.)
Late Pennsylvanian (Virgilian)
Named from Hog Creek, Brown Co., Colorado River region, central TX (US geologic names lexicons, USGS Bull. 896, 1200).
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 ([ ]).