Geologic units in Putnam county, Georgia

Biotite Granite Gneiss/ Feldspathic Biotite Gneiss/ Amphibolite Hornblende Gneiss (Precambrian-Paleozoic) at surface, covers 45 % of this area

Biotite Granite Gneiss/ Feldspathic Biotite Gneiss/ Amphibolite Hornblende Gneiss

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

Granite Gneiss/ Amphibolite

Granitic Gneiss undifferentiated (Precambrian-Paleozoic) at surface, covers 12 % of this area

Granitic Gneiss undifferentiated

Biotite Gneiss/ Feldspathic Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 5 % of this area

Biotite Gneiss/ Feldspathic Biotite Gneiss

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

Granite Gneiss/ Granite

Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 0.7 % of this area

Biotite gneiss

Mafic Hornfels (Precambrian-Paleozoic) at surface, covers 0.7 % of this area

Mafic Hornfels

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

Gabbro

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

Porphyritic granite

Ultramafic rocks undifferentiated (Precambrian-Paleozoic) at surface, covers 0.1 % of this area

Ultramafic rocks undifferentiated

Granite undifferentiated (Precambrian-Paleozoic) at surface, covers 0.1 % of this area

Granite undifferentiated

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

Hornblende Gneiss/ Granite Gneiss/ Biotite Gneiss

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

Hornblende Gneiss/ Amphibolite