Structural Measurement Atlas
Atlas / States / Arizona

Arizona strike and dip data

30,240 structural measurements in Arizona, digitized from 1,349 published geologic maps across 4 sources. Every row carries its azimuth, inclination, measurement type, location confidence and the citation of the map it came from.

Open Arizona 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 Arizona holds:

Measurement typeGeometryMeasurementsShare
Other Planar — strike and dip 12,88143%
Bedding Planar — strike and dip 9,34231%
Foliation Planar — strike and dip 2,7219%
Joint Planar — strike and dip 2,5048%
Vein / dike Planar — strike and dip 1,3995%
Fault plane Planar — strike and dip 7733%
Lineation (mineral, stretching) Linear — trend and plunge 4582%
Slickenline Linear — trend and plunge 94<1%
Fold hinge / axis Linear — trend and plunge 35<1%
Cleavage Planar — strike and dip 33<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
NGMDB legacy quads 23,80279%
NPS GRI parks 3,73312%
USGS data releases · MRDS 1,5385%
USGS NGMDB GeMS 1,1674%

Most-measured published maps

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

Published mapYearScaleMeasurements
Tectonic map of southeast Arizona2002 1:125,0002,930
Geologic map of the Valle 30' x 60' quadrangle, Coconino County, northern Arizona2006 1:100,0002,199
Geologic map of the Glen Canyon Dam 30' x 60' quadrangle, Coconino County, northern Arizona2013 1:50,0001,945
Geologic map of the Cameron 30' x 60' quadrangle, Coconino County, northern Arizona2007 1:100,0001,672
Geologic map of the Tuba City 30' x 60' quadrangle, Coconino County, Arizona2012 1:50,0001,451
Geologic map of the Peach Springs 30' x 60' quadrangle, Mohave and Coconino Counties, northwestern Arizona2006 1:100,0001,414
Geologic map of the Fredonia 30' x 60' quadrangle, Mohave and Coconino Counties, northern Arizona2008 1:100,0001,383
Spatial digital database for the geology of the San Pedro River Basin in Cochise, Gila, Graham, Pima, and Pinal Counties, Arizona2002 1:24,0001,251
Spatial digital database of the geologic map of Catalina Core Complex and San Pedro Trough, Pima, Pinal, Gila, Graham, and Cochise Counties, Arizona2002 1:125,000884
MohaveMtnsArea48k_USGS_I-23082025 1:48,000811
Digital geologic map of Arizona: a digital database derived from the 1983 printing of the Wilson, Moore, and Cooper, 1:500,000-scale map2000 1:500,000776
Geologic map of the Littlefield 30' X 60' quadrangle, Mohave County, northwestern Arizona2000 1:100,000702
adapted from: Spencer, J.E., and Richard, S.M., 1999, Geologic Map and Report for the Theodore Roosevelt Dam Area, Gila and Maricopa Counties, Arizona, Arizona Geological Survey, Open-File Report OFR 99-06, 1:24,000 scale2013 24000683
Preliminary geologic map of Black Canyon and surrounding region, Nevada and Arizona2014 1:48,000565
adapted from: Skinner, L.A., Haxel, G., and Umhoefer, P.J., 2008, Geological Reconnaissance at Organ Pipe Cactus National Monument, Arizona: Northern Arizona University, unpublished digital data, scale 1:24,0002021 24000537

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 Arizona.

Map unitAgeLithologyMeasurements
Gneiss, Spotted leucogranite gneiss Xgl Early ProterozoicMeta-felsic and intermediate rock213
Metaplutonic rocks, Granodiorite Pgd ProterozoicMetaigneous rock114
Gneiss, undivided Xg Early ProterozoicMetamorphic rock83
Older fanglomerate Tof MioceneAlluvial sediment73
Gneiss, Biotite gneiss Xgb Early ProterozoicSchist and gneiss, of sedimentary-rock origin71
Xg ——66
Flows, tuff, and sedimentary rocks, Lava flows, sills, tuffs, and sedimentary rocks Tfl early MioceneSedimentary and extrusive igneous material62
Sedimentary and volcanic rocks of Fox Wash, Sandstone Tfs Miocene and lower Tertiary?Sandstone47
Younger conglomerate basalt, and tuff, Sedimentary and interbedded pyroclastic rocks Tys middle and early MioceneSedimentary and extrusive igneous material46
Augen gneiss, Granodiorite augen gneiss unit Xagd Early ProterozoicMeta-felsic and intermediate rock40
Augen gneiss, Granite augen gneiss unit Xag Early ProterozoicMeta-felsic and intermediate rock36
Gneiss, Pegmatite and monzogranite Xgp Early ProterozoicMeta-felsic and intermediate rock36

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