Usage:
Bentley Alloformation (LA*)
Bentley Formation (TX*)
Geologic age:
Pleistocene*
Type section, locality, area and/or origin of name:
Notable exposures along LA Highway 19 between Bentley and Colfax, Grant Parish, and between Trout and White Sulphur Springs, La Salle Parish, and on U.S. Highway 71 between Grant-Rapides Parish line and Bayou Rigolette, central LA (Fisk, 1938).
AAPG geologic province:
Arkla 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 ([ ]).