Structural Measurement Atlas
Atlas / States / South Dakota

South Dakota strike and dip data

37,339 structural measurements in South Dakota, digitized from 259 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 South Dakota 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 South Dakota holds:

Measurement typeGeometryMeasurementsShare
Bedding Planar — strike and dip 20,54155%
Foliation Planar — strike and dip 5,41615%
Other Planar — strike and dip 4,65412%
Joint Planar — strike and dip 4,33312%
Lineation (mineral, stretching) Linear — trend and plunge 9082%
Vein / dike Planar — strike and dip 7122%
Fold hinge / axis Linear — trend and plunge 5702%
Cleavage Planar — strike and dip 140<1%
Fault plane Planar — strike and dip 65<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
South Dakota SDGS 34,89793%
NPS GRI parks 2,0195%
USGS data releases · MRDS 253<1%
NGMDB legacy quads 153<1%
Montana MBMG 10<1%
Wyoming WSGS 7<1%

Most-measured published maps

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

Published mapYearScaleMeasurements
Geologic Quadrangle map series GIS data (GQ24K 1:24,000 and GQ250K 1:250,000)— GQ24K = 1:24,000 (Black Hills bedrock quads + eastern glacial quads); GQ250K = 1:250,000 sheets34,897
adapted from: Fagnan, B.A., Lincoln, B.Z., and Lincoln, T.N., 2013, Geologic Map of Wind Cave National Park: South Dakota Geological Survey, Geologic Quadrangle Map GQ24K-16, scale 1:24,0002024 240001,031
adapted from: Fagnan, Brian A., 2009, Geologic Map of the Jewel Cave Quadrangle, South Dakota: South Dakota Geological Survey, Geologic Quadrangle Map GQ24k-9, scale 1:24,0002020 24000705
Quaternary geologic map of the Platte River 4 degrees x 6 degrees quadrangle, United States1994 1:1,000,000150
adapted from: DeWitt, Ed, 2003, Unpublished Black Hills Geology Mylars: U.S. Geological Survey, unpublished mylars, scale 1:100,0002024 100000131
adapted from: Wilmarth, V.R., and Smith, R.D., 1957, Preliminary Geologic Map of the Southwest part of the Minnekahta Quadrangle, Fall River County, South Dakota: U.S. Geological Survey, Mineral Investigations Field Studies Map MF-70, scale 1:7,2002025 720097
adapted from: Raymond, W.H., and King, R.U., 1976, Geologic Map of the Badlands National Monument and Vicinity, West-Central South Dakota: U.S. Geological Survey, Miscellaneous Investigations Series Map, I-934, scale 1:62,5002023 6250040
adapted from: DeWitt, Ed, 2003, Unpublished Black Hills Geology Mylars: U.S. Geological Survey, unpublished mylars, scale 1:100,0002020 10000015
Seamless 1:100,000 geologic map, OrientationDataPoints— 1:100,00010
DAS01— 1:24,000–1:100,0007
Geologic map of the Ekalaka 30' x 60' quadrangle, eastern Montana and adjacent North and South Dakota2001 1:100,0002
Eureka — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10055773— —2
Homestake — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=102022802022 —2
King of the West — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10055589— —2
Midas Mine — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10012459— —2

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 South Dakota.

Map unitAgeLithologyMeasurements
Kcs ——3
TRPs ——3
Kb ——1

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