Eocene and Oligocene Residuum, undifferentiated
Providence Sand, includes Perote Member
Ripley Formation
Nanafalia Formation
Up-dip equivalent of Lisbon and Tallahatta Formations
Nanafalia, Porters Creek, and Clayton Formations, undifferentiated
Clayton Formation
As mapped includes lower Eocene Bashi Marl Member of the Hatchetigbee Formation
Cusseta Sand