Structural Measurement Atlas
Atlas / States / Iowa

Iowa strike and dip data

34 structural measurements in Iowa, digitized from 3 published geologic maps across 2 sources. Every row carries its azimuth, inclination, measurement type, location confidence and the citation of the map it came from.

Open Iowa 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 Iowa holds:

Measurement typeGeometryMeasurementsShare
Lineation (mineral, stretching) Linear — trend and plunge 1956%
Bedding Planar — strike and dip 618%
Joint Planar — strike and dip 515%
Other Planar — strike and dip 412%

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 2985%
Wisconsin WGNHS 515%

Most-measured published maps

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

Published mapYearScaleMeasurements
Quaternary geologic map of the Des Moines 4 degrees x 6 degrees quadrangle, United States1991 1:1,000,00028
This_study— 7.5-minute quads at 1:24,000; county maps 1:100,000; state sheets 1:250,000-1:1,000,0005
Quaternary geologic map of the Platte River 4 degrees x 6 degrees quadrangle, United States1994 1:1,000,0001

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 Iowa.

Map unitAgeLithologyMeasurements
Og ——3
Od ——2

Other states