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

Geologic units in Crawford county, Georgia

Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 41 % of this area

Biotite gneiss

Lithology: biotite gneiss

Ripley Formation (Cretaceous) at surface, covers 7 % of this area

Ripley Formation

Lithology: clay or mud; sand; limestone

Cusseta, Blufftown, and Eutaw Formations, undifferentiated (Cretaceous) at surface, covers 20 % of this area

Cusseta, Blufftown, and Eutaw Formations, undifferentiated

Lithology: sand; clay or mud

Stream alluvium (Quaternary) at surface, covers 6 % of this area

Stream alluvium and undifferentiated terrace deposits

Lithology: alluvium; alluvial terrace

Hornblende Gneiss (Precambrian-Paleozoic) at surface, covers 0.9 % of this area

Hornblende Gneiss

Lithology: gneiss

Eocene undifferentiated (Eocene) at surface, covers 7 % of this area

Eocene undifferentiated, highly weathered sands and sandy clays of lower Tertiary age

Lithology: sand; clay or mud

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

Ultramafic rocks undifferentiated

Lithology: ultramafic intrusive rock

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

Mica Schist/ Gneiss/ Amphibolite

Lithology: mica schist; gneiss; amphibolite

Tuscaloosa Formation (Cretaceous) at surface, covers 16 % of this area

Tuscaloosa Formation

Lithology: sand; clay or mud; gravel

Eocene and Oligocene Residuum, undifferentiated (Eocene-Oligocene) at surface, covers 0.7 % of this area

Eocene and Oligocene Residuum, undifferentiated

Lithology: sand; clay or mud