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Geologic units in Berrien county, Georgia

Miccosukee Formation (Neogene) at surface, covers 42 % of this area

Miccosukee Formation

Neogene undifferentiated (Neogene) at surface, covers 29 % of this area

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

Pleistocene-Pliocene sands and gravels (Pleistocene-Pliocene) at surface, covers 26 % of this area

Includes, in part, Sunderland, Coharie, and Brandywine "Formations" of Cooke, 1939

Hawthorn Formation (Miocene) at surface, covers 4 % of this area

Includes Marks Head Formation; Parachucia Beds (Sloan, 1905); and Alum Bluff Formation (Veatch and Stephenson, 1911).