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

Geologic units in Henry county, Virginia

[Additional scientific data in this geographic area]

Candler Formation - Phyllite and schist (Cambrian) at surface, covers 0.3 % 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

Alligator Back Formation - Actinolite schist (Proterozoic Z-Cambrian) at surface, covers < 0.1 % of this area

Alligator Back Formation - Actinolite schist

Lithology: schist

Newark Supergroup; Triassic Sandstone, Siltstone, and Shale (Upper Triassic) at surface, covers 0.1 % of this area

Interbedded sandstone, siltstone, and shale

Lithology: sandstone; siltstone; shale

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

Ashe Formation - Biotite gneiss and garnetiferous amphibolite.

Lithology: biotite gneiss; amphibolite; quartzite

Newark Supergroup, Dan River Group; Stoneville Formation (Triassic) at surface, covers < 0.1 % of this area

Stoneville Formation - conglomerate, sandstone, and mudstone, lenticular and laterally-gradational bedding.

Lithology: conglomerate; sandstone; mudstone

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 < 0.1 % of this area

Mafic Igneous Complex Undivided - Mafic igneous complex.

Lithology: mafic metavolcanic rock

Rich Acres Formation (Cambrian) at surface, covers 17 % of this area

Rich Acres Formation - Norite, metagabbro, and diorite.

Lithology: norite; gabbro; diorite

Newark Supergroup; Conglomerate, mixed clasts (Upper Triassic) at surface, covers 0.2 % of this area

Conglomerate, mixed clasts

Lithology: conglomerate

Bassett Formation - Biotite gneiss and granite gneiss. (Proterozoic Z) at surface, covers 17 % of this area

Bassett Formation - Quartzofeldspathic biotite gneiss and granite gneiss.

Lithology: biotite gneiss; granitic gneiss

Metagraywacke and Muscovite-Biotite Schist (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Metagraywacke and Muscovite-Biotite Schist - metagraywacke (biotite gneiss) interlayered and gradational with muscovite-biotite schist; minor marble and granitic rock.

Lithology: metasedimentary rock; mica schist; marble; granite

Mylonite, Mylonite Gneiss, and Cataclastic Rocks (Proterozoic - Paleozoic ?) at surface, covers 0.1 % of this area

Mylonite, mylonite gneiss, and cataclastic rocks.

Lithology: mylonite; gneiss; cataclastite

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

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

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

Fork Mountain Formation (Proterozoic Z-Cambrian) at surface, covers 33 % of this area

Fork Mountain Formation - Quartzose mica schist, garnet-biotite gneiss, calc-silicate quartzite, and melange.

Lithology: mica schist; gneiss; quartzite; melange

Alligator Back Formation - Feldspathic metagraywacke (Proterozoic Z-Cambrian) at surface, covers 0.8 % of this area

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

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

Alligator Back Formation (Proterozoic Z-Cambrian) at surface, covers 4 % of this area

Alligator Back Formation - Garnet-mica schist, garnet amphibolite, hornblende granite gneiss

Lithology: mica schist; amphibolite; gneiss; quartzite

Leatherwood Granite (Cambrian) at surface, covers 9 % of this area

Leatherwood Granite - Granite

Lithology: granite

Alaskite (Proterozoic) at surface, covers 0.7 % of this area

Alaskite

Lithology: alkali-granite (alaskite)

Bassett Formation - Amphibolite. (Proterozoic Z-Cambrian) at surface, covers 5 % of this area

Bassett Formation - Amphibolite.

Lithology: amphibolite; gneiss; schist

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

Felsic volcanic and volcaniclastic rocks.

Lithology: felsic volcanic rock; mixed clastic/volcanic

Stuart Creek Gneiss (Proterozoic Y) at surface, covers 4 % of this area

Stuart Creek Gneiss - Biotite augen and flaser gneiss

Lithology: augen gneiss; flaser gneiss