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

Geologic units in Roanoke City, Virginia

[Additional scientific data in this geographic area]

Charnockite (Proterozoic Y) at surface, covers 0.5 % of this area

Charnockite.

Lithology: granitic gneiss

Moccasin or Bays Formation through Blackford Formation (Ordovician) at surface, covers 3 % of this area

Moccasin or Bays Formation through Blackford Formation - Dusky-red shale and mudstone; sandstone; limestone, in part cherty; and calcareous shale.

Lithology: shale; mudstone; sandstone; limestone; chert

Millboro Shale and Needmore Formation (Devonian) at surface, covers < 0.1 % of this area

Millboro Shale and Needmore Formation - Black, fissile shale; gray calcareous shale; Tioga metabentonite at top of Needmore.

Lithology: black shale; shale; bentonite; limestone

Beekmantown Group (Ordovician) at surface, covers 0.7 % of this area

Beekmantown Group - Dolomite, limestone, and chert. Includes Pinesburg Station Dolomite, Rockdale Run Formation, Beekmantown Formation, Stonehenge Limestone, and Chepultepec Formation.

Lithology: dolostone (dolomite); limestone; chert

Layered Porphyrobliastic Pyroxene Granulite (Proterozoic Y) at surface, covers 1 % of this area

Layered porphyroblastic pyroxene granulite

Lithology: granulite

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

Elbrook Formation - Dolomite, shale, and minor limestone.

Lithology: dolostone (dolomite); limestone; shale; siltstone

Juniata, Reedsville, Trenton, and Eggleston Formations (Ordovician) at surface, covers 0.5 % of this area

Juniata, Reedsville, Trenton, and Eggleston Formations - Dusky-red shale and mudstone and sandstone; shale and limestone. Note: one area in southeastern Bland County has landslides with intact stratigraphic units.

Lithology: shale; mudstone; sandstone; limestone

Conococheague Formation (Cambrian) at surface, covers 3 % of this area

Conococheague Formation - Limestone, dolomite, and calcareous sandstone.

Lithology: limestone; dolostone (dolomite); sandstone

Chilhowee Group (Cambrian) at surface, covers 2 % 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)

Rome Formation (Cambrian) at surface, covers 68 % of this area

Rome Formation - Dusky-red and green shale and siltstone, dolomite, and limestone.

Lithology: shale; siltstone; sandstone; dolostone (dolomite); limestone

Shady Dolomite (Cambrian) at surface, covers 5 % of this area

Shady Dolomite - Dolomite.

Lithology: dolostone (dolomite); limestone; shale