Geologic units in Madison county, Georgia

Sillimanite Schist/ Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 6 % of this area: Sillimanite Schist/ Gneiss/ Amphibolite
Lithology: schist; gneiss; amphibolite
Biotite Gneiss/ Amphibolite (Age not given) at surface, covers 6 % of this area: Biotite Gneiss/ Amphibolite
Lithology: biotite gneiss; amphibolite
Granite/ gneissic biotite granite (Precambrian-Paleozoic) at surface, covers 0.2 % of this area: Granite/ gneissic biotite granite
Lithology: granite
Sillimanite Schist/ Gneiss (Precambrian-Paleozoic) at surface, covers 2 % of this area: Sillimanite Schist/ Gneiss
Lithology: schist; gneiss
Granite undifferentiated (Precambrian-Paleozoic) at surface, covers 0.4 % of this area: Granite undifferentiated
Lithology: granite
Biotitic Gneiss / Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers 55 % of this area: Biotitic Gneiss / Mica Schist/ Amphibolite
Lithology: biotite gneiss; mica schist; amphibolite
Sillimanite Schist (Precambrian-Paleozoic) at surface, covers 23 % of this area: Sillimanite Schist
Lithology: schist
Biotite Gneiss/ Feldspathic Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 7 % of this area: Biotite Gneiss/ Feldspathic Biotite Gneiss
Lithology: biotite gneiss; felsic gneiss
Mica Schist (Precambrian-Paleozoic) at surface, covers 0.5 % of this area: Mica Schist
Lithology: mica schist