Usage:
Smackover Formation (AL*,AR*,FL*,LA*,MS*,TX*)
Smackover Formation of Louark Group (subsurface of AR,LA,TX)
Smackover Limestone (AL,LA,TX)
Geologic age:
Jurassic, Late*
Oxfordian
Type section, locality, area and/or origin of name:
Not designated. First known from Lion Oil Refining Company Hayes No. 9-A well, in sec. 9, T. 16 S., R. 15 W., Union Co., AR. Named from Smackover field (Bingham, 1937).
Reference section (subsurface): depth-interval 11,075 to 12,007 ft, Pan-American Petroleum Corp. Giraud Gas Unit No. 1, East Texas basin, Cass Co., TX (Dickinson, 1968).
AAPG geologic province:
Arkla basin*
Mid-Gulf Coast basin*
Gulf Coast 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 ([ ]).