Eutaw Formation

Light-greenish-gray to yellowish-gray cross-bedded, well-sorted, micaceous, fine to medium quartz sand that is fossiliferous and glauconitic in part and contains beds of greenish-gray micaceous, silty clay and medium-dark-gray carbonaceous clay. Light-gray glauconitic fossiliferous sand, thin beds of sandstone, and massive accumulations of fossil oyster shells occur locally in the upper part of the formation in western AL (Tombigbee Sand Member). In eastern AL thin to thick-bedded accumulations of the fossil oyster Ostrea cretacea Morton occur throughout much of the formation.
State Alabama
Name Eutaw Formation
Geologic age Cretaceous
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > SandLight-greenish-gray to yellowish-gray cross-bedded, well-sorted, micaceous, fine to medium quartz sand that is fossiliferous and glauconitic in part; light-gray glauconitic fossiliferous sand
Unconsolidated > Fine-detrital > Clay (Bed)contains beds of greenish-gray micaceous, silty clay and medium-dark-gray carbonaceous clay.
Minor
Sedimentary > Carbonate > Limestone > Coquina (Calcareous)massive accumulations of fossil oyster shells occur locally in the upper part of the formation in western AL (Tombigbee Sand Member). In eastern AL thin to thick-bedded accumulations of the fossil oyster Ostrea cretacea Morton occur throughout much of the formation.
Incidental
Sedimentary > Clastic > Sandstonethin beds of sandstone
References

Szabo, M.W., Osborne, E.W., Copeland, C.W. Jr., and Neathery, T.L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.

NGMDB product
Counties Autauga - Bibb - Chilton - Colbert - Dallas - Elmore - Franklin - Greene - Hale - Lamar - Lauderdale - Lee - Lowndes - Macon - Marion - Montgomery - Perry - Pickens - Russell - Tuscaloosa