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Mineral Resources > Online Spatial Data > Geology > by state > Georgia Geology

Geologic units in Cobb county, Georgia

[Additional scientific data in this geographic area]

Porphyritic granite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Porphyritic granite

Lithology: granite

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

Garnet Mica Schist/ Gneiss

Lithology: mica schist; gneiss

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

Quartzite/ Metagraywacke

Lithology: quartzite; metasedimentary rock

Hornblende Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 13 % of this area

Hornblende Gneiss/ Amphibolite

Lithology: gneiss; amphibolite

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

Biotite gneiss

Lithology: biotite gneiss

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

Amphibolite

Lithology: amphibolite

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

Phyllite undifferentiated

Lithology: phyllite

Biotite Gneiss/ Amphibolite (Age not given) at surface, covers 7 % of this area

Biotite Gneiss/ Amphibolite

Lithology: biotite gneiss; amphibolite

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

Garnet Mica Schist/ Amphibolite

Lithology: mica schist; amphibolite

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

Mica Schist

Lithology: mica schist

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

Quartzite/ Mica Schist

Lithology: quartzite; mica schist

Granitic Gneiss undifferentiated (Precambrian-Paleozoic) at surface, covers 0.5 % of this area

Granitic Gneiss undifferentiated

Lithology: granitic gneiss

Ultramafic rocks undifferentiated (Precambrian-Paleozoic) at surface, covers 0.2 % of this area

Ultramafic rocks undifferentiated

Lithology: ultramafic intrusive rock

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

Quartzite

Lithology: quartzite

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

Garnet Mica Schist

Lithology: mica schist

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

Mica Schist/ Gneiss/ Amphibolite

Lithology: mica schist; gneiss; amphibolite

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

Amphibolitic Schist

Lithology: amphibole schist

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

Aluminous Schist

Lithology: schist

Biotitic Gneiss / Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers 28 % of this area

Biotitic Gneiss / Mica Schist/ Amphibolite

Lithology: biotite gneiss; mica schist; amphibolite

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

Amphibolite/ Mica Schist/ Biotitic Gneiss

Lithology: amphibolite; mica schist; biotite gneiss

Button Mica Schist (Precambrian-Paleozoic) at surface, covers 0.7 % of this area

Button Mica Schist

Lithology: mica schist

Granitic Gneiss / Gneissic Granite (augen or porphyritic) (Precambrian-Paleozoic) at surface, covers 4 % of this area

Granitic Gneiss / Gneissic Granite (augen or porphyritic)

Lithology: granitic gneiss; granite

Hornblende Gneiss (Precambrian-Paleozoic) at surface, covers 0.5 % of this area

Hornblende Gneiss

Lithology: gneiss