Usage:
Colony Creek Shale of Canyon Group (TX)
Colony Creek Shale Member of Caddo Creek Formation of Canyon Group (TX*)
Subunits:
Cundiff Limestone [unranked] (TX).
Geologic age:
Late Pennsylvanian (Virgilian)*
Type section, locality, area and/or origin of name:
Type area: branching headwaters of Colony Creek in vicinity of Colony School, 4 mi west of Ranger, northeastern Eastland Co., TX (Cheney, 1948).
AAPG geologic province:
Bend arch*
Fort Worth syncline*
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 ([ ]).