Geologic units in Moore county, North Carolina

Middendorf Formation (Cretaceous) at surface, covers 38 % of this area

Sand, sandstone, and mudstone, gray to pale gray with an orange cast, mottled; clay balls and iron-cemented concretions common, beds laterally discontinuous, cross-bedding common.

Metavolcanic-Epiclastic Rock (Cambrian/Late Proterozoic) at surface, covers 17 % of this area

Metamorphosed argillite, mudstone, volcanic sandstone, conglomerate, and volcanic rock.

Newark Supergroup, Chatham Group; Pekin Formation (Triassic) at surface, covers 9 % of this area

Conglomerate, sandstone, and mudstone.

Cape Fear Formation (Cretaceous) at surface, covers 8 % of this area

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.

Pinehurst Formation (Tertiary) at surface, covers 8 % of this area

Sand, medium- to coarse-grained, cross-bedding and rhythmic bands of clayey sand common, unconsolidated.

Newark Supergroup, Chatham Group; Sanford Formation (Triassic) at surface, covers 6 % of this area

Conglomerate, fanglomerate, sandstone, and mudstone.

Metamudstone and Meta-Argillite (Cambrian/Late Proterozoic) at surface, covers 5 % of this area

Thin to thick bedded; bedding plane and axial-planar cleavage common; interbedded with metasandstone, metaconglomerate, and metavolcanic rock.

Felsic Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 3 % of this area

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

Newark Supergroup, Chatham Group; Cumnock Formation (Triassic) at surface, covers 2 % of this area

Sandstone and mudstone, gray to black; coal beds and carbonaceous shale. Grades into Pekin and Sanford formations.

Phyllite and Schist (Cambrian/Late Proterozoic) at surface, covers 2 % of this area

Minor biotite and pyrite; includes phyllonite, sheared fine-grained metasediment and metavolcanic rock.

Newark Supergroup, Chatham Group; Chatham Group, Undivided (Triassic) at surface, covers 2 % of this area

Conglomerate, fanglomerate, sandstone, and mudstone. Conglomerate and fanglomerate shown by pattern.

Intermediate Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 0.9 % of this area

Metamorphosed andesitic tuffs and flows, medium to dark grayish green; minor felsic and mafic metavolcanic rock.

Phyllite and Schist (Cambrian/Late Proterozoic) at surface, covers 0.5 % of this area

Locally laminated and pyritic; includes phyllonite, sheared fine-grained metasediment, and metavolcanic rock. In Lilesville granite aureole, includes hornfels.

Mafic Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 0.1 % of this area

Metamorphosed basaltic flows and tuffs, dark green to black; interbedded with felsic and intermediate metavolcanic rock and metamudstone.

Newark Supergroup, Chatham Group; Diabase (Jurassic) at surface, covers 0.1 % of this area

Diabase - dikes and sills, gray to black.

Terrace Deposits and Upland Sediment (Tertiary) at surface, covers < 0.1 % of this area

Gravel, clayey sand, and sand, minor iron-oxide cemented sandstone.

Castle Hayne Formation; Comfort Member and New Hanover Member, undivided (Tertiary) at surface, covers < 0.1 % of this area

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.

Uwharrie Formation; Felsic Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

(At Asheboro and to south) Metamorphosed dacitic to rhyolitic flows and tuffs, light gray to greenish gray; interbedded with mafic and intermediate metavolcanic rock, meta-argillite, and metamudstone.