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Mineral Resources > Online Spatial Data > Geology > by state > Virginia Geology

Geologic units in Amherst county, Virginia

[Additional scientific data in this geographic area]

Ultramafic Rocks (Proterozoic Z-Cambrian) at surface, covers 0.2 % of this area

Ultramafic rocks

Lithology: ultramafic rock; schist

Mafic Igneous Complex Undivided (Proterozoic Z-Cambrian) at surface, covers 0.5 % of this area

Mafic Igneous Complex Undivided - Mafic igneous complex.

Lithology: mafic metavolcanic rock

Leucocharnockite (Proterozoic Y) at surface, covers 0.6 % of this area

Leucocharnockite

Lithology: granite

Catoctin Formation - Metabasalt (Proterozoic Z-Cambrian) at surface, covers 0.6 % of this area

Catoctin Formation - Metabasalt.

Lithology: meta-basalt

Chilhowee Group (Cambrian) at surface, covers 7 % of this area

Chilhowee Group - Appalachian Plateaus and Valley and Ridge: Quartzite, conglomerate, feldspathic sandstone, phyllite, and minor ferruginous sandstone and volcanic rocks. Blue Ridge Anticlinorium: Conglomerate, quartzite, metasiltstone, and phyllite.

Lithology: quartzite; conglomerate; sandstone; phyllite; meta-argillite; volcanic rock (aphanitic)

Metagabbro (Proterozoic Z-Cambrian) at surface, covers < 0.1 % of this area

Metagabbro

Lithology: amphibolite; amphibolite

Alligator Back Formation - Banded marble (Proterozoic Z-Cambrian) at surface, covers 0.6 % of this area

Alligator Back Formation - Banded marble

Lithology: marble; gneiss; schist

Leucocratic Granulite and Gneiss (Proterozoic Y) at surface, covers 0.4 % of this area

Leucocratic granulite and gneiss.

Lithology: granulite; gneiss

Ashe Formation - Biotite gneiss (Proterozoic Z) at surface, covers 7 % of this area

Ashe Formation - Biotite gneiss.

Lithology: biotite gneiss

Mobley Mountain Granite (Proterozoic Z) at surface, covers 0.5 % of this area

Mobley Mountain granite - Granite

Lithology: granite

Biotite-Muscovite Leucogranite Gneiss (Proterozoic Y) at surface, covers 0.6 % of this area

Biotite-muscovite leucogranite gneiss

Lithology: granitic gneiss

Roseland Anorthosite (Proterozoic Y) at surface, covers 0.7 % of this area

Roseland anorthosite - Anorthosite

Lithology: anorthosite

Porphyritic Leucocharnockite (Proterozoic Y) at surface, covers 5 % of this area

Porphyritic Leucocharnockite - Leucocharnockite

Lithology: granite

Alligator Back Formation - Actinolite schist (Proterozoic Z-Cambrian) at surface, covers 2 % of this area

Alligator Back Formation - Actinolite schist

Lithology: schist

Layered Pyroxene Granulite (Proterozoic Y) at surface, covers 8 % of this area

Layered pyroxene granulite

Lithology: granulite

Candler Formation - Phyllite and schist (Cambrian) at surface, covers 2 % of this area

Candler Formation - Phyllite in central Blue Ridge Anticlinorium; Phyllite, metasiltstone and quartz-mica schist in southwest Blue Ridge Anticlinorium

Lithology: phyllite; schist; metasedimentary rock

Alkali Feldspar Leucogranite (Proterozoic Y) at surface, covers 0.2 % of this area

Alkali feldspar leucogranite

Lithology: granite

Biotite-Hornblende Granodiorite (Proterozoic Y) at surface, covers 0.2 % of this area

Biotite-hornblende granodiorite

Lithology: granodiorite

Lynchburg Group; Metagraywacke (Proterozoic Z) at surface, covers < 0.1 % of this area

Lynchburg Group - Metagraywacke

Lithology: meta-argillite; schist; conglomerate

Biotite Granodiorite and Biotite Granite (Proterozoic Z) at surface, covers < 0.1 % of this area

Biotite granodiorite, biotite granite

Lithology: granodiorite; granite

Border Gneiss (Proterozoic Y) at surface, covers 1 % of this area

border gneiss - Gneiss.

Lithology: gneiss

Layered Quartzofeldspathic Augen Gneiss and Flaser Gneiss (Proterozoic Y) at surface, covers 5 % of this area

Layered quartzofeldspathic augen gneiss and flaser gneiss.

Lithology: felsic gneiss; flaser gneiss

Layered Porphyrobliastic Pyroxene Granulite (Proterozoic Y) at surface, covers 0.5 % of this area

Layered porphyroblastic pyroxene granulite

Lithology: granulite

Alligator Back Formation - Feldspathic metagraywacke (Proterozoic Z-Cambrian) at surface, covers 11 % of this area

Alligator Back Formation - Meta-argillite is feldspathic metagraywacke; graphitic mica schist, and quartzite.

Lithology: meta-argillite; schist; quartzite; melange; marble; gneiss

Ashe Formation - Moneta Gneiss (Proterozoic Z) at surface, covers 3 % of this area

Ashe Formation - Moneta Gneiss - Hornblende and hornblende-biotite gneiss

Lithology: mafic gneiss

Mylonite, Mylonite Gneiss, and Cataclastic Rocks (Proterozoic - Paleozoic ?) at surface, covers 12 % of this area

Mylonite, mylonite gneiss, and cataclastic rocks.

Lithology: mylonite; gneiss; cataclastite

Porphyoblastic Biotite-Plagioclase Augen Gneiss (Proterozoic Y) at surface, covers 19 % of this area

Porphyoblastic biotite-plagioclase augen gneiss

Lithology: augen gneiss

Layered Biotite Granulite and Gneiss (Proterozoic Y) at surface, covers 3 % of this area

Layered biotite granulite and gneiss.

Lithology: gneiss; granulite

Charnockite Gneiss (Proterozoic Y) at surface, covers 2 % of this area

Charnockite gneiss

Lithology: gneiss

Charnockite (Proterozoic Y) at surface, covers 8 % of this area

Charnockite.

Lithology: granitic gneiss