Selma Group; Mooreville Chalk

Yellowish-gray to olive-gray compact fossiliferous clayey chalk and chalky marl. The unconformable contact at the base is characterized by a bed of glauconitic, chalky sand containing phosphate pellets and molds of fossils. The Arcola Limestone Member at the top consists of two to four beds of light-gray brittle, dense, fossiliferous limestone seperated by beds of light-gray to pale-olive calcareous clay.
State Alabama
Name Selma Group; Mooreville Chalk
Geologic age Cretaceous
Lithologic constituents
Major
Unconsolidated > Marlchalky marl.
Sedimentary > Carbonate > Limestone > ChalkYellowish-gray to olive-gray compact fossiliferous clayey chalk and chalky marl.
Minor
Unconsolidated > Fine-detrital > Clay (Bed)The Arcola Limestone Member at the top consists of two to four beds of light-gray brittle, dense, fossiliferous limestone seperated by beds of light-gray to pale-olive calcareous clay.
Unconsolidated > Coarse-detrital > Sand (Bed)The unconformable contact at the base is characterized by a bed of glauconitic, chalky sand containing phosphate pellets and molds of fossils.
Sedimentary > Carbonate > Limestone (Bed)The Arcola Limestone Member at the top consists of two to four beds of light-gray brittle, dense, fossiliferous limestone .
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.

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Counties Autauga - Bullock - Dallas - Elmore - Greene - Hale - Lowndes - Macon - Marengo - Montgomery - Perry - Pickens - Russell - Sumter