Structural Measurement Atlas
Atlas / States / Virginia

Virginia strike and dip data

42,037 structural measurements in Virginia, digitized from 296 published geologic maps across 6 sources. Every row carries its azimuth, inclination, measurement type, location confidence and the citation of the map it came from.

Open Virginia on the map

What kinds of measurement

The Atlas separates planar structures, recorded as a strike and dip, from linear ones, recorded as a trend and plunge. This is what Virginia holds:

Measurement typeGeometryMeasurementsShare
Bedding Planar — strike and dip 25,77261%
Foliation Planar — strike and dip 6,91216%
Joint Planar — strike and dip 3,4898%
Other Planar — strike and dip 2,0985%
Cleavage Planar — strike and dip 1,5094%
Lineation (mineral, stretching) Linear — trend and plunge 1,0533%
Vein / dike Planar — strike and dip 6251%
Fold hinge / axis Linear — trend and plunge 286<1%
Fault plane Planar — strike and dip 206<1%
Slickenline Linear — trend and plunge 87<1%

Where the data comes from

Each source is a survey, agency or program whose published mapping was harvested and reconciled into one schema. Rows are published only where the source's terms permit redistribution.

SourceMeasurementsShare
Virginia DGMR 18,63244%
USGS NGMDB GeMS 13,46132%
NGMDB legacy quads 6,11815%
NPS GRI parks 3,5969%
USGS data releases · MRDS 226<1%
Maryland Geol. Survey 4<1%

Most-measured published maps

The individual quadrangles and data releases contributing the most measurements in Virginia. The full citation for every map behind a selection ships in the sources.csv of any export.

Published mapYearScaleMeasurements
Merschat, A.J., Carter, M.W., Lynn, A.S., Weinmann, B.R., Odom, W.E., McAleer, R.J., Mahan, S.A., Stewart, K.G., Holm-Denoma, C.S., and Crider, E.A., Jr., 2026, Preliminary geologic map of the Sparta East, Sparta West, and parts of the Glade Valley and Whitehead 7.5-minute quadrangles, North Carolina and Virginia, and the epicentral area of the August 9, 2020, Mw 5.1 earthquake near Sparta, North Carolina: U.S. Geological Survey Open-File Report 2026–1010, 1 sheet, scale 1:24,000.2026 1:24,0004,295
Schultz, A.P. and Bartholomew, M.J., 2009, Geologic map of the Radford North quadrangle, Virginia: Virginia Division of Geology and Mineral Resources, Open-file report 09-01, 1:24,000-scale geologic map.2009 1:24,0002,395
Geologic map database of the Washington DC area featuring data from three 30 X 60 minute quadrangles: Frederick, Washington West, Fredericksburg2001 1:100,0001,957
adapted from: Southworth, S., Aleinikoff, J.N., Bailey, C.M., Burton, W.C., Crider, E.A., Hackley, P.C., Smoot, J.P., and Tollo, R.P., 2009, Geologic Map of the Shenandoah National Park Region, Virginia: U.S. Geological Survey, OFR 2009-1153, 1:100,000 scale2009 1000001,836
Bartholomew, M.J., Lowry, W.D., and Henika, W.S., 2012, Interstate 81 Corridor Digital Geologic Compilation: Blacksburg quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-file report 12-01, 1:24,000-scale geologic map.2012 1:24,0001,391
Gathright, T.M., II and Frischmann, P.S., 1986, Geology of the Harrisonburg and Bridgewater quadrangles, Virginia: Virginia Division of Mineral Resources Publication 60, 21 p.1986 1:24,0001,386
Henika, W.S. and Bartholomew, M.J., 2012, Geologic map of the Ironto 7.5-minute quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-file report 12-03, 1:24,000-scale geologic map.2012 1:24,0001,130
Schultz, A.P. and Bartholomew, M.J., 2010, Geologic map of the Radford South quadrangle, Virginia: Virginia Department of Mines, Minerals and Energy, Division of Geology and Mineral Resources, Open-file Report 10-08, 1:24,000-scale geologic map.2010 1:24,0001,041
Henika, W.S., 1981, Geology of the Villamont and Montvale quadrangles, Virginia: Virginia Division of Mineral Resources Publication 35, 18 p.1981 1:24,000998
Geologic map of the Washington West 30’ × 60’ quadrangle, Maryland, Virginia, and Washington D.C.2017 1:100,000953
Orndorff, R.C., Epstein, J.B., and McDowell, R.C., 1999, Geologic map of the Middletown quadrangle, Frederick, Shenandoah, and Warren Counties, Virginia: U.S. Geological Survey, 1:24,000-scale geologic map.1999 1:24,000949
Bartholomew, M.J., 1981, Geology of the Roanoke and Stewartsville quadrangles: Virginia Division of Mineral Resources Publication 34, 23 p.1981 1:24,000918
Gathright, T.M., II, Henika, W.S., and Sullivan, J.L., III, 1978, Geology of the Mount Sidney quadrangle, Virginia: Virginia Division of Mineral Resources Publication 11, map with text.1978 1:24,000898
This report2019 1:24,000871
DAS194|DAS993— 1:24,000859

Most-measured map units

Where a source recorded the geologic unit a measurement was taken on, the Atlas keeps it. These are the units carrying the most measurements in Virginia.

Map unitAgeLithologyMeasurements
Beekmantown Formation Ob OrdovicianMostly carbonate rock4,748
Elbrook Formation Ce CambrianMostly carbonate rock4,512
Conococheague Formation OCco Ordovician to CambrianLimestone3,178
Edinburg Formation Oe OrdovicianMostly carbonate rock2,080
Rome Formation Cr CambrianMostly mudstone1,612
Elbrook Formation Ce CambrianCarbonate rock1,453
Metagraywacke and graphitic schist of the Lynchburg Group Zl NeoproterozoicSchist and gneiss, of sedimentary-rock origin1,096
Stonehenge Limestone of Beekmantown Group Ost OrdovicianLimestone747
Biotite granitic gneiss Ybgg MesoproterozoicMeta-felsic and intermediate rock635
Metagraywacke and schist of the Ashe Metamorphic Suite CZa Cambrian to NeoproterozoicMedium and high-grade regional metamorphic rock, of unspecified origin558
New Market Limestone On OrdovicianMostly carbonate rock531
Augen gneiss Yag MesoproterozoicMeta-felsic and intermediate rock460

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