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

Geologic units in Granville county, North Carolina

Felsic Volcanic Rocks (Proterozoic Z) at surface, covers < 0.1 % of this area

Felsic volcanic rocks.

Lithology: felsic volcanic rock

Hornblende-plagioclase Gabbro (Proterozoic) at surface, covers < 0.1 % of this area

Hornblende Gabbro in Carolina Slate Belt; Hornblende-Plagioclase Gabbro in Central Virginia Volcanic-Plutonic Belt; Gabbro, Hornblendite and Norite in Central Piedmont

Lithology: gabbro; norite

Diabase (Jurassic) at surface, covers 2 % of this area

Diabase - dikes, gray to black.

Lithology: diabase

Meta-ultramafic Rock (Paleozoic/Late Proterozoic) at surface, covers 0.3 % of this area

Meta-ultramafic Rock - metamorphosed dunite and peridotite; serpentine, soapstone, and other altered ultramafic rock. Only larger bodies shown.

Lithology: metamorphic rock; serpentinite

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

Metamorphosed Quartz Diorite - foliated to massive.

Lithology: metamorphic rock

Felsic Mica Gneiss (Cambrian/Late Proterozoic) at surface, covers 0.6 % of this area

Felsic Mica Gneiss - interlayered with biotite and hornblende gneiss and schist.

Lithology: felsic gneiss; mafic gneiss; biotite gneiss; mica schist

Biotite Gneiss and Schist (Cambrian/Late Proterozoic) at surface, covers 3 % of this area

Biotite Gneiss and Schist - 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.

Lithology: biotite gneiss; mica schist; amphibolite; calc-silicate rock; granite

Metavolcanic-Epiclastic Rock (Cambrian/Late Proterozoic) at surface, covers 7 % of this area

Metavolcanic-Epiclastic Rock - metamorphosed argillite, mudstone, volcanic sandstone, and conglomerate, and volcanic rock.

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

Aaron Slate (Proterozoic Z) at surface, covers < 0.1 % of this area

Aaron Slate - Phyllite and slate.

Lithology: phyllite; slate; metasedimentary rock

Virgilina Greenstone (Proterozoic Z) at surface, covers < 0.1 % of this area

Virgilina Greenstone - Greenstone metabasalt.

Lithology: greenstone

Phyllite and Metatuff (Proterozoic Z) at surface, covers 0.1 % of this area

Phyllite and metatuff.

Lithology: phyllite; felsic metavolcanic rock

Granitic Rock (Permian/Pennsylvanian) at surface, covers 0.3 % of this area

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

Lithology: granite

Newark Supergroup, Chatham Group; Chatham Group, Undivided (Triassic) at surface, covers 16 % of this area

Chatham Group, Undivided - conglomerate, fanglomerate, sandstone, and mudstone. Conglomerate and fanglomerate shown by pattern.

Lithology: conglomerate; sandstone; mudstone

Metamorphosed Granitic Rock (Cambrian/Late Proterozoic) at surface, covers 21 % of this area

Metamorphosed Granitic Rock (520-650 my) - megacrystic, well foliated, locally contains hornblende; Fountain intrusive.

Lithology: metamorphic rock

Amphibolite (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Amphibolite - equigranular, massive to well foliated, dioritic to basaltic dikes and sills; variably metamorphosed.

Lithology: amphibolite; basalt; diorite

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

Metamorphosed Gabbro and Diorite - foliated to massive.

Lithology: metamorphic rock

Felsic Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 23 % 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

Phyllite and Metasiltstone (Proterozoic Z) at surface, covers < 0.1 % of this area

Phyllite and metasiltstone.

Lithology: phyllite; meta-argillite

Metavolcanic Rock (Cambrian/Late Proterozoic) at surface, covers 16 % of this area

Metavolcanic Rock - interbedded felsic to mafic tuffs and flowrock.

Lithology: felsic metavolcanic rock; mafic metavolcanic rock

Metatonalite (Proterozoic) at surface, covers < 0.1 % of this area

Metatonalite

Lithology: tonalite; granodiorite; quartz diorite