(Selma group), Chalk and marly chalk containing fewer impurities than underlying and overlying formations.
(Selma group), Light-gray cross-bedded to massive glauconitic sand and sandy clay and calcareous sandstone.
(Selma group), Marly chalk and calcareous clay.
Massive fine glauconitic sand.
(Selma group), Gray to greenish-gray fine glauconitic sand, clay, and sandy limestone; south of Oktibbeha County is very sandy micaceous chalk.