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

Geologic units in Prentiss county, Mississippi

Eutaw formation (Tombigbee sand member) (Late Cretaceous) at surface, covers 13 % of this area

Eutaw formation (Tombigbee sand member) - massive fine glauconitic sand.

Lithology: sand

Coffee sand (Upper Cretaceous) at surface, covers 43 % of this area

Coffee sand - (Selma group), Light-gray cross-bedded to massive glauconitic sand and sandy clay and calcareous sandstone.

Lithology: sand; clay or mud; calcarenite

Ripley formation (McNairy sand member) (Upper Cretaceous) at surface, covers < 0.1 % of this area

Ripley formation (McNairy sand member) - (Selma group), red and white cross-bedded micaceous sand and white sandy clay.

Lithology: sand; clay or mud

Ripley formation (Upper Cretaceous) at surface, covers 5 % of this area

Ripley formation - (Selma group), gray to greenish-gray fine glauconitic sand, clay, and sandy limestone; south of Oktibbeha County is very sandy micaceous chalk.

Lithology: sand; clay or mud; limestone; mixed clastic/carbonate

Demopolis chalk (Upper Cretaceous) at surface, covers 19 % of this area

Demopolis chalk - (Selma group), Chalk and marly chalk containing fewer impurities than underlying and overlying formations.

Lithology: carbonate

Eutaw formation (Upper Cretaceous) at surface, covers 18 % of this area

Eutaw formation - More or less cross-bedded and thinly laminated glauconitic sand and clay; basal part includes the McShan formation, greenish-gray, micaceous, locally very glauconitic, very fine-grained sand and thin-bedded light-gray clay, small chert gravels may be present in basal beds, not recognized in northern Tishomingo County.

Lithology: sand; clay or mud; gravels