Geologic units in Upson county, Georgia

Granitic Gneiss undifferentiated (Precambrian-Paleozoic) at surface, covers 36 % of this area

Granitic Gneiss undifferentiated

Mica Schist/ Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 23 % of this area

Mica Schist/ Gneiss/ Amphibolite

Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 21 % of this area

Biotite gneiss

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

Mica Schist

Quartzite (Precambrian-Paleozoic) at surface, covers 5 % of this area

Quartzite

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

Hornblende Gneiss/ Amphibolite/ Granite Gneiss

Charnockite (Precambrian-Paleozoic) at surface, covers 2 % of this area

Charnockite

Mylonite and ultramylonite (Age uncertain) at surface, covers 0.6 % of this area

Mylonite and ultramylonite