Geologic units in Marion county, Georgia

Tuscahoma Sand (Paleocene) at surface, covers 0.2 % of this area: Tuscahoma Sand, as mapped includes lower Eocene Bashi Marl Member of the Hatchetigbee Formation
Lithology: sand
Blufftown Formation (Cretaceous) at surface, covers 11 % of this area: Blufftown Formation
Lithology: clay or mud; sand
Cusseta Sand (Cretaceous) at surface, covers 24 % of this area: Cusseta Sand
Lithology: sand; clay or mud; siltstone
Eocene and Oligocene Residuum, undifferentiated (Eocene-Oligocene) at surface, covers 11 % of this area: Eocene and Oligocene Residuum, undifferentiated
Lithology: sand; clay or mud
Tuscaloosa Formation (Cretaceous) at surface, covers 1 % of this area: Tuscaloosa Formation
Lithology: sand; clay or mud; gravel
Eutaw Formation (Cretaceous) at surface, covers 5 % of this area: Eutaw Formation
Lithology: clay or mud; sand
Nanafalia, Porters Creek, and Clayton Formations, undifferentiated (Paleocene) at surface, covers < 0.1 % of this area: Nanafalia, Porters Creek, and Clayton Formations, undifferentiated
Lithology: clay or mud; sand
Stream alluvium (Quaternary) at surface, covers < 0.1 % of this area: Stream alluvium and undifferentiated terrace deposits
Lithology: alluvium; alluvial terrace
Ripley Formation (Cretaceous) at surface, covers 29 % of this area: Ripley Formation
Lithology: clay or mud; sand; limestone
Providence Sand (Cretaceous) at surface, covers 19 % of this area: Providence Sand, includes Perote Member
Lithology: sand