USGS Home
Contact USGS
Search USGS

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

Geologic units in Scott county, Virginia

[Additional scientific data in this geographic area]

Keefer, Rose Hill, and Tuscarora Formations (Silurian) at surface, covers < 0.1 % of this area

Keefer, Rose Hill, and Tuscarora Formations - Quartzarenite, dusky-red shale, and sandstone, Some landslides with intact stratigraphic units in Craig County area..

Lithology: arenite; shale; sandstone

Nolichucky Shale, and Maryville, Rogersville, and Rutledge Formations, and Pumpkin Valley Shale (Cambrian) at surface, covers < 0.1 % of this area

(Cn) Nolichucky Shale - Pastel-colored (pink, greenish, olive), flaky clay shale; gray, commonly oolitic, shaly limestone lenses; locally stromatolitic limestone layers; thin, blocky siltstone near middle. Thickness 500 feet in the east to 900 feet in the west.; (Cmr) Maryville, Rogersville, and Rutledge Formations - Maryvile and Rutledge are gray limestone, in part oolitic, with gray dolomite locally. Rogersville is green clay shale. Thickness 400 to 1,000 feet. Pumpkin Valley Shale - Dull-brown to maroon shale with numerous interbeds of thin, blocky, sandy siltstone. Thickness 100 to 600 feet.

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

Lower Devonian and Silurian Formations Undivided (Silurian-Devonian) at surface, covers 0.3 % of this area

Lower Devonian and Silurian Formations Undivided - Some landslides with intact stratigraphic units in Craig County area. Includes: Dsu, Skrt, Sm. (Shrc?)

Lithology: sandstone; limestone; shale

Moccasin or Bays Formation through Blackford Formation (Ordovician) at surface, covers 7 % 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

Brallier Formation (Devonian) at surface, covers 2 % of this area

Brallier Formation - Micaceous shale, siltstone, and sandstone.

Lithology: shale; siltstone; sandstone

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

Maynardville Limestone - Thick-bedded, bluish-gray, ribboned (silt and dolomite), nodular limestone; light-gray, fine- grained, laminated to thin-bedded, noncherty dolomite in upper part. Thickness 150 to 400 feet.

Lithology: limestone; dolostone (dolomite)

Upper and Middle Ordovician Formations Undivided (Ordovician) at surface, covers 0.6 % of this area

Upper and Middle Ordovician Formations Undivided - Includes: Oun, Ous, Ou, Om, Okpl, Oeln, Oml, Ols.

Lithology: shale; sandstone; mudstone; limestone; siltstone; graywacke; chert

Chepultepec and Copper Ridge Formations (Cambrian-Ordovician) at surface, covers 3 % of this area

Chepultepec and Copper Ridge Formations - Dolomite, minor limestone, chert, and calcareous sandstone.

Lithology: dolostone (dolomite); limestone; chert; sandstone

Hardy Creek Limestone through Dot Limestone (Ordovician) at surface, covers 2 % of this area

Hardy Creek Limestone through Dot Limestone - Limestone, in part cherty; and calcareous shale. Includes Hardy Creek, Ben Hur, Woodway, Hurricane Bridge, Martin Creek, Rob Camp, Poteet, and Dot Limestones.

Lithology: limestone; shale; chert

Maccrady Shale and Price Formation (Mississippian) at surface, covers 1 % of this area

Maccrady Shale and Price Formation - Includes: Maccrady Shale: Dusky-red and green shale and mudstone; and evaporite deposits. Price Formation: Sandstone, conglomeratic sandstone, and shale with carbonaceous partings and impure coal beds.

Lithology: sandstone; shale; mudstone; coal; evaporite

Greenbrier Limestone (Mississippian) at surface, covers 4 % of this area

Greenbrier Limestone - Limestone, in part cherty, fossiliferous; shale.

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

Lee Formation (Pennsylvanian) at surface, covers 9 % of this area

Lee Formation - Quartzarenite, sandstone, conglomerate, shale, siltstone, and coal.

Lithology: arenite; sandstone; conglomerate; shale; siltstone; coal

Sequatchie Formation, Reedsville Shale, Trenton Limestone, Eggleston Formation (Ordovician) at surface, covers 0.4 % of this area

Sequatchie Formation, Reedsville Shale, Trenton Limestone, Eggleston Formation - Shale, siltstone, limestone, and sandstone.

Lithology: shale; siltstone; limestone; sandstone

Norton Formation (Pennsylvanian) at surface, covers 0.4 % of this area

Norton Formation - Shale, siltstone, sandstone, and coal.

Lithology: shale; siltstone; sandstone; coal

Mascot and Kingsport Dolomites (Ordovician) at surface, covers 2 % of this area

Mascot and Kingsport Dolomites - Dolomite, chert, and minor limestone.

Lithology: dolostone (dolomite); chert; limestone

Cove Creek Limestone and Fido Sandstone (Mississippian) at surface, covers 3 % of this area

Cove Creek Limestone and Fido Sandstone - Limestone and calcareous sandstone.

Lithology: limestone; sandstone

Rome Formation (Cambrian) at surface, covers 11 % of this area

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

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

Mississippian Formations Undivided (Mississippian) at surface, covers 5 % of this area

Mississippian Formations Undivided - Includes Pennington Group, Bluefield Formation, Greenbrier Limestone, Maccrady Shale and Price Formation; Includes Newman Limestone, Fort Payne Chert, and Grainger Formation in western Lee County

Lithology: shale; limestone; sandstone; siltstone; dolostone (dolomite); conglomerate; mudstone; arenite; coal; evaporite; chert

Silurian Formations Undivided (Silurian) at surface, covers 3 % of this area

Silurian Formations Undivided - Some landslides with intact stratigraphic units in Giles County area. Includes: Dsu, Skrt, Sm. (Shrc?)

Lithology: sandstone; shale; limestone; arenite; conglomerate

Knox Group (Cambrian-Ordovician) at surface, covers 19 % of this area

Knox Group - dolostone, limestone, sandstone. Includes the Mascot Dolomite, Kingsport Dolomite, Chepultepec Dolomite, Copper Ridge Dolomite. (Includes: Ob, Omk, Occo, Cco, Occc.)

Lithology: dolostone (dolomite); limestone; chert; sandstone

Hancock, Rose Hill, and Clinch Formations (Silurian) at surface, covers 2 % of this area

Hancock, Rose Hill, and Clinch Formations - Limestone and dolomite; dusky-red and green shale and sandstone; and sandstone, shale and conglomerate.

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

Pennington Group (Mississippian) at surface, covers 4 % of this area

Pennington Group - Shale, sandstone, dusky-red mudstone, conglomerate, siltstone, and limestone.

Lithology: shale; sandstone; mudstone; conglomerate; siltstone; limestone

Silurian and Upper Ordovician Formations Undivided (Ordovician-Silurian) at surface, covers 0.1 % of this area

Silurian and Upper Ordovician Formations Undivided - Includes: Skrt, Sm, Oun, Ous, Ou, Om. (Shrc and Okpl?)

Lithology: sandstone; shale; siltstone; limestone; mudstone; quartzite; arenite

Copper Ridge Dolomite (Cambrian) at surface, covers < 0.1 % of this area

Copper Ridge Dolomite - Coarse, dark-gray, knotty dolomite, asphaltic in places, with much gray, medium-grained, well- bedded dolomite; abundant chert; cryptozoans typical. Thickness about 1,000 feet.

Lithology: dolostone (dolomite); chert

Nolichucky and Maryville Formations, Rogersville Shale, and Rutledge Formation (Cambrian) at surface, covers 7 % of this area

Nolichucky and Maryville Formations, Rogersville Shale, and Rutledge Formation - Calcareous shale, limestone, and dolomite.

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

Nolichucky and Honaker Formations (Cambrian) at surface, covers 9 % of this area

Nolichucky and Honaker Formations - Dolomitic shale; dolomite and minor chert.

Lithology: shale; dolostone (dolomite); chert

Chattanooga Shale and Wildcat Valley Sandstone (Devonian-Mississippian) at surface, covers 2 % of this area

Chattanooga Shale and Wildcat Valley Sandstone - Black, fissile shale and siltstone; calcareous sandstone

Lithology: black shale; siltstone; sandstone

Chepultepec Dolomite (Ordovician) at surface, covers < 0.1 % of this area

Chepultepec Dolomite - Light-gray, fine-grained, well-bedded dolomite, moderately cherty; fine-grained limestone locally in upper part; quartz sandstone beds at base. Average thickness about 800 feet.

Lithology: dolostone (dolomite); limestone; sandstone

Juniata, Reedsville, Trenton, and Eggleston Formations (Ordovician) at surface, covers 2 % 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

Millboro Shale, Huntersville Chert, and Rocky Gap Sandstone (Devonian) at surface, covers 0.6 % of this area

Millboro Shale, Huntersville Chert, and Rocky Gap Sandstone - Black, fissile shale; chert; and calcareous sandstone

Lithology: black shale; chert; sandstone