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

Geologic units in Halifax county, Virginia

Aaron Slate (Proterozoic Z) at surface, covers 0.2 % of this area

Aaron Slate - Metaconglomerate.

Lithology: meta-conglomerate

Interlayered Mafic and Felsic Metavolcanic Rocks - Quartz-muscovite schist and gneiss. (Cambrian) at surface, covers 8 % of this area

Interlayered Mafic and Felsic Metavolcanic Rocks - Quartz-muscovite schist and gneiss.

Lithology: pelitic schist; gneiss

Diorite and Quartz Diorite (Proterozoic) at surface, covers 0.4 % of this area

Diorite and quartz diorite.

Lithology: diorite; quartz diorite

Shelton Formation (Ordovician) at surface, covers 3 % of this area

Shelton Formation - Granite and quartz monzonite gneiss

Lithology: granite; gneiss

Buffalo Granite (Proterozoic) at surface, covers 0.2 % of this area

Buffalo granite - Granite

Lithology: granite

Red Oak Pluton (Proterozoic) at surface, covers < 0.1 % of this area

Red Oak pluton - Granite

Lithology: granite

Biotite Granite (Proterozoic) at surface, covers 3 % of this area

Biotite granite

Lithology: granite

Melrose Granite (Cambrian) at surface, covers 1 % of this area

Melrose Granite - Granite

Lithology: granite; quartz monzonite; quartz diorite

Lineated Biotite Granite Gneiss (Proterozoic) at surface, covers 1 % of this area

Lineated biotite granite gneiss

Lithology: granitic gneiss

Arvonia Formation - Kyanite quartzite and schist. (Ordovician) at surface, covers < 0.1 % of this area

Arvonia Formation - Kyanite quartzite and schist.

Lithology: quartzite; schist

Newark Supergroup; Triassic shale and siltstone (Triassic) at surface, covers < 0.1 % of this area

Interbedded shale and siltstone

Lithology: shale; siltstone

Newark Supergroup; Conglomerate, mixed clasts (Upper Triassic) at surface, covers 0.8 % of this area

Conglomerate, mixed clasts

Lithology: conglomerate

Virgilina Greenstone (Proterozoic Z) at surface, covers 4 % of this area

Virgilina Greenstone - Greenstone metabasalt.

Lithology: greenstone

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

Abbeyville gabbro

Lithology: gabbro

Mylonite, Mylonite Gneiss, and Cataclastic Rocks (Proterozoic - Paleozoic ?) at surface, covers 2 % of this area

Mylonite, mylonite gneiss, and cataclastic rocks.

Lithology: mylonite; gneiss; cataclastite

Interlayered Mafic and Felsic Metavolcanic Rocks - Foliated felsite (Cambrian) at surface, covers 13 % of this area

Interlayered Mafic and Felsic Metavolcanic Rocks - Foliated felsite

Lithology: felsic volcanic rock; schist; gneiss; breccia

Aaron Slate (Proterozoic Z) at surface, covers 6 % of this area

Aaron Slate - Phyllite and slate.

Lithology: phyllite; slate; metasedimentary rock

Arvonia Formation - Porphyroblastic garnet-biotite schist (Ordovician) at surface, covers 0.2 % of this area

Arvonia Formation - Porphyroblastic garnet-biotite schist

Lithology: mica schist

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

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

Diorite gneiss

Lithology: gneiss

Newark Supergroup; Sandstone, undifferentiated (Upper Triassic) at surface, covers < 0.1 % of this area

Sandstone, undifferentiated

Lithology: sandstone

Interlayered Mafic and Felsic Metavolcanic Rocks - Quartzofeldspathic biotite gneiss (Cambrian) at surface, covers 42 % of this area

Interlayered Mafic and Felsic Metavolcanic Rocks - Quartzofeldspathic biotite gneiss

Lithology: biotite gneiss; schist; intermediate volcanic rock

Newark Supergroup; Triassic Sandstone, Siltstone, and Shale (Upper Triassic) at surface, covers 0.9 % of this area

Interbedded sandstone, siltstone, and shale

Lithology: sandstone; siltstone; shale

Hyco Formation (Proterozoic Z) at surface, covers 6 % of this area

Hyco Formation - Lithic and crystal metatuff

Lithology: metavolcanic rock; schist

Interlayered Mafic and Felsic Metavolcanic Rocks - Amphibolite, hornblende-biotite gneiss, and schist. (Cambrian) at surface, covers 4 % of this area

Interlayered Mafic and Felsic Metavolcanic Rocks - Amphibolite, hornblende-biotite gneiss, and schist.

Lithology: amphibolite; biotite gneiss; schist