Geologic units in Warren county, Georgia

Granite undifferentiated (Precambrian-Paleozoic) at surface, covers 38 % of this area

Granite undifferentiated

Irwinton Sand (Eocene) at surface, covers 14 % of this area

Up-dip equivalent of Twiggs Clay, Sandersville Limestone, and Cooper Marl. As mapped, also includes younger clastics of indefinite Late Tertiary age.

Sericite Schist (Precambrian-Paleozoic) at surface, covers 9 % of this area

Sericite Schist

Granitic Gneiss undifferentiated (Precambrian-Paleozoic) at surface, covers 9 % of this area

Granitic Gneiss undifferentiated

Felsic Metavolcanics (Precambrian-Paleozoic) at surface, covers 8 % of this area

Felsic Metavolcanics

Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist (Precambrian-Paleozoic) at surface, covers 6 % of this area

Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist

Quartz Sericite Schist/ Biotitic Gneiss (Precambrian-Paleozoic) at surface, covers 4 % of this area

Quartz Sericite Schist/ Biotitic Gneiss

Mica Schist/ Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 3 % of this area

Mica Schist/ Gneiss/ Amphibolite

Undifferentiated Metavolcanics/ Sericite phyllite/ Meta-argillite/ Quartz mica schist (Precambrian-Paleozoic) at surface, covers 2 % of this area

Undifferentiated Metavolcanics/ Sericite phyllite/ Meta-argillite/ Quartz mica schist

Lower Tertiary-Cretaceous undifferentiated (Lower Tertiary-Cretaceous) at surface, covers 2 % of this area

As mapped includes Middendorf Formation (Sloan, 1904); "Channel Sands" (LaMoreaux, 1946); Tuscaloosa Formation (Cooke, 1939); and "Huber beds" (Buie, informal terminology)

Quartzite/ Mica Schist (Precambrian-Paleozoic) at surface, covers 2 % of this area

Quartzite/ Mica Schist

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

Twiggs Clay

Quartz Mica Schist/ Hornblende Schist/ Biotitic Gneiss (Precambrian-Paleozoic) at surface, covers 1 % of this area

Quartz Mica Schist/ Hornblende Schist/ Biotitic Gneiss

Meta-argillite/ Phyllite (Precambrian-Paleozoic) at surface, covers 0.8 % of this area

Meta-argillite/ Phyllite

Meta-argillite/ Sericite phyllite/ Metavolcanics (Precambrian-Paleozoic) at surface, covers 0.4 % of this area

Meta-argillite/ Sericite phyllite/ Metavolcanics

Biotite Gneiss/ Feldspathic Biotite Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Biotite Gneiss/ Feldspathic Biotite Gneiss

Sericite Schist/ Amphibolite/ Granite gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Sericite Schist/ Amphibolite/ Granite gneiss

Granite Gneiss/ Granite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Granite Gneiss/ Granite