Usage:
/Big Branch Gneiss (TX)
[?] /Big Branch Diorite (TX)
[Preoccupied. Name previously applied to Big Branch Formation by Floyd and Nufer (1935) in OK.]
Geologic age:
Precambrian
Type section, locality, area and/or origin of name:
Type locality not stated. Occurs in northeastern Gillespie and northwestern Blanco Cos., central TX. Named from Big Branch of Coal Creek (Barnes, [1946]).
AAPG geologic province:
Midcontinent region
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 ([ ]).