Geologic units in Clayton county, Georgia

Granite Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 74 % of this area

Granite Gneiss/ Amphibolite

Hornblende-Biotite Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 9 % of this area

Hornblende-Biotite Gneiss/ Amphibolite

Biotitic Gneiss / Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers 7 % of this area

Biotitic Gneiss / Mica Schist/ Amphibolite

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

Hornblende Gneiss

Mica Schist/ Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 4 % of this area

Mica Schist/ Gneiss/ Amphibolite

Ultramafic rocks undifferentiated (Precambrian-Paleozoic) at surface, covers 0.3 % of this area

Ultramafic rocks undifferentiated

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

Hornblende Gneiss/ Amphibolite