Geologic units in Lenoir county, North Carolina

Castle Hayne Formation; Comfort Member and New Hanover Member, undivided (Tertiary) at surface, covers 2 % of this area: Comfort Member and New Hanover Member, undivided - Comfort Member: bryozoan-echinoid skeletal limestone, locally dolomitized, solution cavities common. New Hanover Member: phosphate-pebble conglomerate, micritic, thin; restricted to basal part of Castle Hayne Formation in southeastern counties.
Lithology: limestone; dolostone (dolomite); conglomerate
Beaufort Formation, Undivided (Tertiary) at surface, covers 4 % of this area: Beaufort Formation, Undivided - Unnamed upper member: sand and silty clay, glauconitic, fossiliferous, and locally calcareous. Jericho Run Member: siliceous mudstone with sandstone lenses, thin bedded; basal phosphatic pebble conglomerate.
Lithology: sand; clay or mud; silt; mudstone; sandstone; conglomerate
Peedee Formation (Cretaceous) at surface, covers 65 % of this area: Peedee Formation - sand, clayey sand, and clay, greenish gray to olive black, massive, glauconitic, locally fossiliferous and calcareous. Patches of sandy molluscan-mold limestone in upper part.
Lithology: sand; clay or mud; limestone
Black Creek Formation (Cretaceous) at surface, covers 29 % of this area: Black Creek Formation - clay, gray to black, lignitic; contains thin beds and laminae of fine-grained micaceous sand and thick lenses of cross-bedded sand. Glauconitic, fossiliferous clayey sand lenses in upper part.
Lithology: clay or mud; sand