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

Geologic units in Louisa county, Virginia

[Additional scientific data in this geographic area]

Porphyroblastic Garnet-Biotite Gneiss (Proterozoic Y) at surface, covers 17 % of this area

Porphyroblastic garnet-biotite gneiss.

Lithology: biotite gneiss

Candler Formation - Metasiltstone (Cambrian) at surface, covers < 0.1 % of this area

Candler Formation - Meta-argillite is laminated metasiltstone

Lithology: meta-argillite

Ta River Metamorphic Suite (Cambrian) at surface, covers 10 % of this area

Ta River Metamorphic Suite - Amphibolite gneiss

Lithology: amphibolite; gneiss; schist; quartzite; biotite gneiss; felsic volcanic rock; gabbro; granite

Mine Run Complex - Melange Zone II (Proterozoic Z-Ordovician) at surface, covers 3 % of this area

Mine Run Complex - Melange Zone II

Lithology: melange

Actinolite Schist Metabasalt (Proterozoic) at surface, covers 0.1 % of this area

Actinolite schist metabasalt

Lithology: meta-basalt

Metagraywacke, Quartzose Schist, and Melange (Proterozoic Z-Cambrian) at surface, covers 19 % of this area

Metagraywacke, Quartzose Schist, and Melange - Meta-argillite is metagraywacke; quartzose schist

Lithology: meta-argillite; schist; melange

Falmouth Intrusive Suite (Mississippian - Pennsylvanian) at surface, covers 3 % of this area

Falmouth Intrusive Suite - Granite, quartz monzonite, granodiorite, and tonalite

Lithology: granite; quartz monzonite; granodiorite; tonalite

Green Springs Pluton - Diorite and hornblendite. (Proterozoic Y-Pennsylvanian) at surface, covers 3 % of this area

Green Springs Pluton - Diorite and hornblendite.

Lithology: diorite; hornblendite

Everona Limestone (Cambrian) at surface, covers < 0.1 % of this area

Everona Limestone - Limestone.

Lithology: limestone; phyllite; slate

Interlayered Mafic and Felsic Metavolcanic Rocks - Quartzofeldspathic biotite gneiss (Cambrian) at surface, covers 5 % of this area

Interlayered Mafic and Felsic Metavolcanic Rocks - Quartzofeldspathic biotite gneiss

Lithology: biotite gneiss; schist; intermediate volcanic rock

Candler Formation - Phyllite and schist (Cambrian) at surface, covers 0.2 % 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

Ellisville Biotite Granodiorite (Ordovician-Silurian) at surface, covers 11 % of this area

Ellisville Biotite Granodiorite - Biotite granodiorite

Lithology: granodiorite

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

Felsic/mafic volcanic rocks as exotic blocks within melange units

Lithology: metavolcanic rock

Green Springs Pluton - Quartz diorite and granite. (Proterozoic Z-Pennsylvanian) at surface, covers 0.6 % of this area

Green Springs Pluton - Quartz diorite and granite.

Lithology: quartz diorite; granite

Falls Run Granite Gneiss (Silurian) at surface, covers 0.4 % of this area

Falls Run Granite Gneiss - Granite

Lithology: granite

Amphibolite, Amphibole Gneiss, and Schist (Proterozoic Y) at surface, covers < 0.1 % of this area

Amphibolite, amphibole gneiss, and schist.

Lithology: schist; gneiss; amphibolite

Quantico Formation - Slate and porphyroblastic schist (Ordovician) at surface, covers 4 % of this area

Quantico Formation - Slate and porphyroblastic schist

Lithology: slate; schist

Mine Run Complex - Melange Zone III (Proterozoic Z-Ordovician) at surface, covers 6 % of this area

Mine Run Complex - Melange Zone III

Lithology: melange

Granite Gneiss (Proterozoic Y-Pennsylvanian) at surface, covers 3 % of this area

Granite gneiss.

Lithology: granitic gneiss

Quantico Formation - Micaceous quartzite (Ordovician) at surface, covers < 0.1 % of this area

Quantico Formation - Micaceous quartzite

Lithology: quartzite; schist

Chopawamsic Formation - Interlayered felsic and mafic metavolcanic rocks (Cambrian) at surface, covers 10 % of this area

Chopawamsic Formation- Interlayered felsic and mafic metavolcanic rocks

Lithology: metavolcanic rock