Geologic units in DeKalb county, Georgia

Mica Schist/ Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 31 % of this area

Mica Schist/ Gneiss/ Amphibolite

Biotitic Gneiss / Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers 21 % of this area

Biotitic Gneiss / Mica Schist/ Amphibolite

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

Granitic Gneiss undifferentiated

Biotitic Gneiss Undifferentiated (Precambrian-Paleozoic) at surface, covers 9 % of this area

Biotitic Gneiss Undifferentiated

Mica Schist/ Gneiss (Precambrian-Paleozoic) at surface, covers 6 % of this area

Mica Schist/ Gneiss

Button Mica Schist (Precambrian-Paleozoic) at surface, covers 5 % of this area

Button Mica Schist

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

Granite Gneiss/ Amphibolite

Non-porphyritic granite (Precambrian-Paleozoic) at surface, covers 4 % of this area

Non-porphyritic granite

Ultramafic rocks undifferentiated (Precambrian-Paleozoic) at surface, covers 3 % of this area

Ultramafic rocks undifferentiated

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

Quartzite/ Mica Schist/ Amphibolite

Biotite Gneiss/ Feldspathic Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 2 % of this area

Biotite Gneiss/ Feldspathic Biotite Gneiss

Calc-silicate Granite Gneiss (Precambrian-Paleozoic) at surface, covers 1 % of this area

Calc-silicate Granite Gneiss

Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 1 % of this area

Biotite gneiss

Aluminous Schist (Precambrian-Paleozoic) at surface, covers 0.6 % of this area

Aluminous Schist

Quartzite/ Mica Schist (Precambrian-Paleozoic) at surface, covers 0.5 % of this area

Quartzite/ Mica Schist

Porphyritic granite (Precambrian-Paleozoic) at surface, covers 0.4 % of this area

Porphyritic granite

Quartzite (Precambrian-Paleozoic) at surface, covers 0.3 % of this area

Quartzite

Sillimanite Schist/ Gneiss (Precambrian-Paleozoic) at surface, covers 0.2 % of this area

Sillimanite Schist/ Gneiss

Hornblende Gneiss (Precambrian-Paleozoic) at surface, covers 0.2 % of this area

Hornblende Gneiss

Metagraywacke/ Mica Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Metagraywacke/ Mica Schist