Usage:
Louark Group (subsurface of AR,LA,MS?,TX)
Subunits:
(alphabetical) -all in subsurface: Buckner Formation (AR), Gilmer Limestone (LA,TX), Haynesville Formation (LA,TX), Louann Formation (AR), Norphlet Formation (AR,LA,TX), Smackover Formation (AR,LA,TX), Werner Formation (AR).
Geologic age:
Jurassic, Late
Type section, locality, area and/or origin of name:
Not stated by author. Origin of name not stated by author. Occurs in subsurface of Gulf Coast Province (Philpott, 1952). [A poorly defined unit.]
AAPG geologic province:
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 ([ ]).