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

Geologic units in Madison county, Virginia

[Additional scientific data in this geographic area]

Charnockite (Proterozoic Y) at surface, covers 4 % of this area

Charnockite.

Lithology: granitic gneiss

Newark Supergroup; Triassic shale and siltstone (Triassic) at surface, covers 0.3 % of this area

Interbedded shale and siltstone

Lithology: shale; siltstone

Lynchburg Group - Conglomerate and metagraywacke (Proterozoic Z) at surface, covers 2 % of this area

Lynchburg Group - Conglomerate and metagraywacke.

Lithology: conglomerate; metasedimentary rock

Lynchburg Group; Charlottesville Formation (Proterozoic Z) at surface, covers 5 % of this area

Lynchburg Group; Charlottesville Formation - Graphitic metasiltstone, feldspathic metasandstone, and quartzite.

Lithology: meta-argillite; sandstone; quartzite; phyllite; slate

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

Charnockite gneiss

Lithology: gneiss

Layered Biotite Granulite and Gneiss (Proterozoic Y) at surface, covers 4 % of this area

Layered biotite granulite and gneiss.

Lithology: gneiss; granulite

Newark Supergroup; Conglomerate, greenstone clasts (Upper Triassic) at surface, covers 0.6 % of this area

Conglomerate, greenstone clasts

Lithology: conglomerate

Newark Supergroup; Conglomerate, mixed clasts (Upper Triassic) at surface, covers 1 % of this area

Conglomerate, mixed clasts

Lithology: conglomerate

Old Rag Granite (Proterozoic Y) at surface, covers 4 % of this area

Old Rag granite - Granite

Lithology: granite

Porphyoblastic Biotite-Plagioclase Augen Gneiss (Proterozoic Y) at surface, covers 12 % of this area

Porphyoblastic biotite-plagioclase augen gneiss

Lithology: augen gneiss

Mylonite, Mylonite Gneiss, and Cataclastic Rocks (Proterozoic - Paleozoic ?) at surface, covers 4 % of this area

Mylonite, mylonite gneiss, and cataclastic rocks.

Lithology: mylonite; gneiss; cataclastite

Fauquier Formation -Meta-arkose and metasiltstone (Proterozoic Z) at surface, covers 0.2 % of this area

Fauquier Formation - Crossbedded metasandstone

Lithology: metasedimentary rock

Fauquier Formation - Arkosic metasandstone (Proterozoic Z) at surface, covers 1 % of this area

Fauquier Formation - Arkosic metasandstone

Lithology: metasedimentary rock

Robertson River Igneous Suite - Arrington Mountain alkali feldspar granite (Proterozoic Z) at surface, covers 0.9 % of this area

Robertson River Igneous Suite - Arrington Mountain alkali feldspar granite

Lithology: granite

Robertson River Igneous Suite - Rivanna granite (Proterozoic Z) at surface, covers 0.2 % of this area

Robertson River Igneous Suite - Rivanna granite

Lithology: granite

Lynchburg Group; Monumental Mills Formation (Proterozoic Z) at surface, covers 0.2 % of this area

Lynchburg Group; Monumental Mills Formation - Metasandstone, laminated metasiltstone, and mudstone.

Lithology: metasedimentary rock; meta-argillite; mudstone

Diabase (Jurassic) at surface, covers 0.1 % of this area

Diabase

Lithology: diabase

Lynchburg Group; Metagraywacke (Proterozoic Z) at surface, covers 16 % of this area

Lynchburg Group - Metagraywacke

Lithology: meta-argillite; schist; conglomerate

Fauquier Formation - Metasiltstone and phyllite (Proterozoic Z) at surface, covers 1 % of this area

Fauquier Formation - Meta-argillite is laminated metasiltstone; and phyllite.

Lithology: meta-argillite; phyllite

Alkali Feldspar Leucogranite (Proterozoic Y) at surface, covers 3 % of this area

Alkali feldspar leucogranite

Lithology: granite

Robertson River Igneous Suite - Hitt Mountain alkali feldspar syenite (Proterozoic Z) at surface, covers 7 % of this area

Robertson River Igneous Suite - Hitt Mountain alkali feldspar syenite

Lithology: alkali syenite

Layered Pyroxene Granulite (Proterozoic Y) at surface, covers 10 % of this area

Layered pyroxene granulite

Lithology: granulite

Robertson River Igneous Suite (Proterozoic Z) at surface, covers 1 % of this area

Robertson River Igneous Suite - White Oak alkali feldspar granite

Lithology: granite

Two-Mica Granite (Proterozoic Y) at surface, covers 0.4 % of this area

Two-mica granite.

Lithology: orthogneiss

Marble (Proterozoic Z) at surface, covers 0.3 % of this area

Marble.

Lithology: marble

Lynchburg Group; Graphitic phyllite and metasiltstone (Proterozoic Z) at surface, covers 0.4 % of this area

Lynchburg Group - Graphitic phyllite and metasiltstone

Lithology: phyllite; meta-argillite; slate; metasedimentary rock; quartzite

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

Biotite granite

Lithology: granite

Metagabbro (Proterozoic Z-Cambrian) at surface, covers 3 % of this area

Metagabbro

Lithology: amphibolite; amphibolite

Catoctin Formation - Metabasalt (Proterozoic Z-Cambrian) at surface, covers 9 % of this area

Catoctin Formation - Metabasalt.

Lithology: meta-basalt

Flint Hill Gneiss (Proterozoic Y) at surface, covers 7 % of this area

Flint Hill Gneiss - Gneiss.

Lithology: gneiss