Finis Shale [unranked] in Cisco Group (TX)
Finis Shale Member of Graham Formation of Cisco Group (TX*)
Late Pennsylvanian (Virgilian)*
Named from Finis, Jack Co., Brazos River region, central northern TX (US geologic names lexicons, USGS Bull. 896, 1200).
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 ([ ]).