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Mineral Resources > Online Spatial Data > Geology > by state > Georgia Geology

Geologic units in Dooly county, Georgia

Nanafalia Formation (Paleocene) at surface, covers 0.3 % of this area

Nanafalia Formation

Lithology: sand; clay or mud

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

Ocala Limestone, 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.

Lithology: limestone

Eocene undifferentiated (Eocene) at surface, covers 0.5 % of this area

Eocene undifferentiated, highly weathered sands and sandy clays of lower Tertiary age

Lithology: sand; clay or mud

Suwannee Limestone and its residuum (Oligocene) at surface, covers 58 % of this area

Suwannee Limestone and its residuum, 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.

Lithology: limestone

Neogene undifferentiated (Neogene) at surface, covers 3 % of this area

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

Lithology: sandstone; claystone

Cooper Marl (Eocene) at surface, covers 0.3 % of this area

"Cooper Marl" (Ecm). It is now recognized that this unit is not the precise lithologic or biostratigraphic equivalent of type Cooper Marl (Huddlestun, Marsalis & Pickering, 1974).

Lithology: clay or mud

Claiborne undifferentiated (Eocene) at surface, covers 6 % of this area

Claiborne undifferentiated, up-dip equivalent of Lisbon and Tallahatta Formations

Lithology: sandstone; clay or mud; carbonate

Twiggs Clay (Eocene) at surface, covers 1 % of this area

Twiggs Clay

Lithology: clay or mud

Stream alluvium (Quaternary) at surface, covers 3 % of this area

Stream alluvium and undifferentiated terrace deposits

Lithology: alluvium; alluvial terrace