Geologic units in Crisp county, Georgia

Neogene undifferentiated (Neogene) at surface, covers 43 % of this area

Includes Altamaha Grit (Dall, 1892); Citronelle Formation (Matson & Berry, 1916); and "Hawthorn Formation" (Cooke, 1939). (*) - outcrops of indurated sandstone and claystone

Ocala Limestone (Eocene) at surface, covers 28 % of this area

Generally covered with Oligocene and Eocene residuum (Flint River Formation of Cooke, 1939); includes up-dip area, Tivola Limestone of Connell (1955). (*)- outcrops of Ocala Limestone on Dougherty Plain.

Suwannee Limestone and its residuum (Oligocene) at surface, covers 25 % of this area

As mapped, includes Chattahoochee Limestone in Seminole and Decatur Cos.; Flint River Formation, in part, (Cooke, 1939); Jacksonboro Limestone in Screven Co.; and Glendon and Marianna Limestones in Pulaski Co.

Stream alluvium (Quaternary) at surface, covers 5 % of this area

Stream alluvium and undifferentiated terrace deposits