Geologic units in Davidson county, North Carolina

Granitic Rock (Permian/Pennsylvanian) at surface, covers 28 % of this area

Megacrystic to equigranular. Churchland Plutonic Suite (Western group) - Churchland, Landis, and Mooresville intrusives.

Cid Formation; Metamudstone and Meta-Argillite (Cambrian/Late Proterozoic) at surface, covers 22 % of this area

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

Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 13 % of this area

Interbedded felsic to mafic tuffs and flowrock.

Metamorphosed Mafic Rock (Paleozoic/Late Proterozoic) at surface, covers 10 % of this area

Metagabbro, metadiorite, and mafic plutonic-volcanic complexes.

Metamorphosed Granitic Rock (Cambrian/Late Proterozoic) at surface, covers 9 % of this area

Megacrystic, well foliated; locally contains hornblende. Chapel Hill, Chatham, Farrington, Meadow Flats, Mt. Moriah, Parks Crossroads plutons, and Roxboro and Vance County suites.

Cid Formation; Felsic Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 5 % of this area

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

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

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

Metamorphosed Gabbro and Diorite (Paleozoic/Late Proterozoic) at surface, covers 2 % of this area

Foliated to massive.

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

Megacrystic, well foliated; locally contains hornblende.

Phyllite and Schist (Cambrian/Late Proterozoic) at surface, covers 1 % of this area

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

Cid Formation; Mafic Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 1.0 % of this area

(Southwest of Asheboro) Metamorphosed basaltic flows and tuffs, dark green to black; interbedded with felsic and intermediate metavolcanic rock and metamudstone.

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

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

Granite of Salisbury Plutonic Suite (Devonian/Silurian) at surface, covers 0.7 % of this area

Pink, massive to weakly foliated. Gold Hill, Kannapolis, Salisbury, Southmont, and Yadkin intrusives.

Felsic Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 0.5 % 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.

Metamorphosed Quartz Diorite (Paleozoic/Late Proterozoic) at surface, covers < 0.1 % of this area

Foliated to massive.