Usage:
Bexar Shale Member of Travis Peak Formation of Trinity Group (TX-outcrop)
Bexar Shale Member of Pearsall Formation of Trinity Group (LA,TX-subsurface)
Geologic age:
Early Cretaceous (Comanchean Provincial Epoch)
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 3,320 to 3,340 ft, Ralph E. Fair, Jack Woodward, Inc., and F.B. Lafevre's Pauline Lyro Well No. 1 in the J.M. Bustillo Survey 29, Bexar Co., south-central TX (Forgotson, 1956).
AAPG geologic province:
Ouachita folded belt
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 ([ ]).