Structural Measurement Atlas
Atlas / States / District of Columbia

District of Columbia strike and dip data

19 structural measurements in District of Columbia, digitized from 2 published geologic maps across 1 source. Every row carries its azimuth, inclination, measurement type, location confidence and the citation of the map it came from.

Open District of Columbia 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 District of Columbia holds:

Measurement typeGeometryMeasurementsShare
Foliation Planar — strike and dip 1474%
Other Planar — strike and dip 316%
Lineation (mineral, stretching) Linear — trend and plunge 211%

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
NGMDB legacy quads 19100%

Most-measured published maps

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

Published mapYearScaleMeasurements
Geologic map of the Washington West 30’ × 60’ quadrangle, Maryland, Virginia, and Washington D.C.2017 1:100,00016
Geologic map database of the Washington DC area featuring data from three 30 X 60 minute quadrangles: Frederick, Washington West, Fredericksburg2001 1:100,0003

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 District of Columbia.

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