Skip to main content

Geologic units in Troup county, Georgia

Additional scientific data in this geographic area

Hornblende Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 66 % of this area

Hornblende Gneiss/ Amphibolite

Lithology: gneiss; amphibolite

Granite Gneiss/ Granite (Precambrian-Paleozoic) at surface, covers 18 % of this area

Granite Gneiss/ Granite

Granite undifferentiated (Precambrian-Paleozoic) at surface, covers 11 % of this area

Granite undifferentiated

Lithology: granite

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

Quartzite

Lithology: quartzite

Mica Schist (Precambrian-Paleozoic) at surface, covers 1 % of this area

Mica Schist

Lithology: mica schist

Aluminous Schist (Precambrian-Paleozoic) at surface, covers 0.8 % of this area

Aluminous Schist

Lithology: schist

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

Granitic Gneiss undifferentiated

Lithology: granitic gneiss

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

Quartzite/ Mica Schist

Lithology: quartzite; mica schist

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

Amphibolite

Lithology: amphibolite

Biotitic Gneiss / Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers 0.4 % of this area

Biotitic Gneiss / Mica Schist/ Amphibolite

Dadeville Complex; Ropes Creek Amphibolite (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area

Ropes Creek Amphibolite - layered and massive amphibolite; locally includes hornblende migmatite and ultramafic pods.

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

Biotite gneiss

Lithology: biotite gneiss

Dadeville Complex; Rock Mills Granite Gneiss (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area

Rock Mills Granite Gneiss - coarse to medium-grained biotite granite gneiss; locally includes thick bands of epidote and thin, small amphibolite bodies. Boundary between Rock Mills Granite Gneiss and Camp Hill Granite Gneiss arbitrarily defined.