Geologic units in Lincoln county, North Carolina

Mica Schist (Cambrian/Late Proterozoic) at surface, covers 22 % of this area

Garnet, staurolite, kyanite, or sillimanite occur locally; lenses and layers of quartz schist, micaceous quartzite, calc-silicate rock, biotite gneiss, amphibolite, and phyllite.

Amphibolite and Biotite Gneiss (Cambrian/Late Proterozoic) at surface, covers 18 % of this area

Interlayered; minor layers and lenses of hornblende gneiss, metagabbro, mica schist, and granitic rock.

Foliated to Massive Granitic Rock (Permian/Pennsylvanian) at surface, covers 11 % of this area

Megacrystic to equigranular. High Shoals Granite.

Blacksburg Formation (Cambrian/Late Proterozoic) at surface, covers 10 % of this area

Sericite schist, locally with graphite, phyllite with sericite quartzite, banded marble, amphibolite, and minor calc-silicate rock.

Biotite Gneiss and Schist (Cambrian/Late Proterozoic) at surface, covers 9 % of this area

Inequigranular, locally abundant potassic feldspar and garnet; interlayered and gradational with calc-silicate rock, sillimanite-mica schist, mica schist, and amphibolite. Contains small masses of granitic rock.

Metamorphosed Quartz Diorite (Paleozoic/Late Proterozoic) at surface, covers 8 % of this area

Foliated to massive.

Battleground Formation (Late Proterozoic) at surface, covers 7 % of this area

Quartz-sericite schist with metavolcanic rock, quartz-pebble metaconglomerate, kyanite-sillimanite quartzite, and garnet-quartz rock.

Granitic Rock (Devonian/Ordovician) at surface, covers 6 % of this area

Locally pinkish gray, massive to weakly foliated; contains hornblende.

Cherryville Granite (Mississippian) at surface, covers 4 % of this area

Massive to weakly foliated; contains pegmatites, lithium-bearing on east side.

Fine-grained Biotite Gneiss (Cambrian/Late Proterozoic) at surface, covers 3 % of this area

Massive to strongly foliated; minor layers of amphibolite and muscovite schist.

Metamorphosed Granitic Rock (Ordovician/Cambrian) at surface, covers 2 % of this area

Equigranular to megacrystic, foliated to massive. Includes Toluca Granite.

Gabbro of Concord Plutonic Suite (Devonian/Ordovician) at surface, covers < 0.1 % of this area

Barber, Concord, Farmington, Mecklenburg, and Weddington intrusives.