USGS Home
Contact USGS
Search USGS

Mineral Resources > Online Spatial Data > Geology > by state > North Carolina Geology

Geologic units in Wilson county, North Carolina

Yorktown Formation and Duplin Formation, Undivided (Tertiary) at surface, covers 69 % of this area

Yorktown Formation and Duplin Formation, Undivided - Yorktown Formation: fossiliferous clay with varying amounts of fine-grained sand, bluish gray, shell material commonly concentrated in lenses; mainly in area north of Neuse River. Duplin Formation: shelly, medium- to coarse-grained sand, sandy marl, and limestone, bluish gray; mainly in area south of Neuse River.

Lithology: clay or mud; sand; limestone

Metamudstone and Meta-Argillite (Cambrian/Late Proterozoic) at surface, covers 14 % of this area

Metamudstone and Meta-Argillite - bedding plane and axial-planar cleavage common; interbedded with metasandstone, meta-conglomerate, and metavolcanic rock.

Lithology: metasedimentary rock; meta-argillite; meta-conglomerate; metavolcanic rock

Cape Fear Formation (Cretaceous) at surface, covers 1 % of this area

Cape Fear Formation - sandstone and sandy mudstone, yellowish gray to bluish gray, mottled red to yellowish orange, indurated, graded and laterally continuos bedding, blocky clay, faint cross-bedding, feldspar and mica common.

Lithology: sandstone; mudstone; sand; clay or mud

Felsic Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 1 % of this area

Felsic Metavolcanic Rock - metamorphosed dacitic to rhyolitic flows and tuffs, light gray to greenish gray; interbedded with mafic and intermediate metavolcanic rock, meta-argillite, and metamudstone.

Lithology: felsic metavolcanic rock; mafic metavolcanic rock; intermediate metavolcanic rock; meta-argillite; metasedimentary rock

Granitic Rock (Permian/Pennsylvanian) at surface, covers 4 % of this area

Granitic Rock (265-325 my) - megacrystic to equigranular. Castalia, Lillington, Medoc Mountain, Sims, Contentnea Creek (?), and Elm City (?) intrusives.

Lithology: granite

Terrace Deposits and Upland Sediment (Tertiary) at surface, covers 11 % of this area

Terrace Deposits and Upland Sediment - gravel, clayey sand, and sand, minor iron-oxide cemented sandstone.

Lithology: terrace; gravel; sand; clay or mud; sandstone