Usage:
Grand Bayou Member of Hall Summit Formation (LA,TX)
Geologic age:
Paleocene
Type section, locality, area and/or origin of name:
Type locality: exposures in secs. 19, 20, 29, and 30, T. 14 N., R. 9 W., Red River Parish, northwestern LA. Outcrop extends into Shelby Co., TX (Murray and Thomas, 1945).
AAPG geologic province:
Arkla basin
East Texas basin
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 ([ ]).