Geologic units in Telfair county, Georgia

Neogene undifferentiated (Neogene) at surface, covers 81 % 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
Stream alluvium (Quaternary) at surface, covers 19 % of this area: Stream alluvium and undifferentiated terrace deposits
Lithology: alluvium; alluvial terrace
Aeolian sand deposits - parabolic dunes (Quaternary) at surface, covers 0.1 % of this area: Aeolian sand deposits - parabolic dunes
Lithology: dune sand
Floyd Shale; Hartselle Sandstone member (Mississippian) at surface, covers < 0.1 % of this area: Hartselle Sandstone member (Mh) in Floyd County
Lithology: sandstone