Structural Measurement Atlas
Atlas / States / Michigan

Michigan strike and dip data

1,093 structural measurements in Michigan, digitized from 40 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 Michigan 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 Michigan holds:

Measurement typeGeometryMeasurementsShare
Other Planar — strike and dip 59454%
Bedding Planar — strike and dip 32129%
Foliation Planar — strike and dip 12211%
Vein / dike Planar — strike and dip 303%
Cleavage Planar — strike and dip 131%
Lineation (mineral, stretching) Linear — trend and plunge 131%

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 78972%
NPS GRI parks 27325%
USGS data releases · MRDS 303%
Wisconsin WGNHS 1<1%

Most-measured published maps

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

Published mapYearScaleMeasurements
Quaternary geologic map of the Lake Superior 4 degrees x 6 degrees quadrangle, United States and Canada1984 1:1,000,000358
adapted from: Huber, N. King , 1973, Geologic Map of Isle Royale National Park, Keweenaw County, Michigan: U.S. Geological Survey, Miscellaneous Geologic Investigations Map I-796, scale 1:62,5002021 62500269
Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30' X 60' quadrangles, Wisconsin, and Michigan1999 1:100,000188
Geology and mineral deposits of the Keweenaw Peninsula and vicinity, Michigan1999 1:100,000181
Quaternary geologic map of the Chicago 4 degrees x 6 degrees quadrangle, United States1983 1:1,000,00040
Quaternary geologic map of the Lake Nipigon 4 degrees x 6 degrees quadrangle, United States and Canada1994 1:1,000,00010
Quaternary geologic map of the Lake Erie 4 degrees x 6 degrees quadrangle, United States and Canada1991 1:1,000,0009
adapted from: Cannon, W.F., McRae, M.E., and Nicholson, S.W., 1999, Geology and Mineral Deposits of the Keweenaw Peninsula and Vicinity, Michigan: U.S. Geological Survey, Open-File Report OF-99-149, scale 1:100,0002024 1000004
Quaternary geologic map of the Minneapolis 4 degrees x 6 degrees quadrangle, United States1983 1:1,000,0003
NE_WI_Region_Bedrock_Greenberg_19841984 7.5-minute quads at 1:24,000; county maps 1:100,000; state sheets 1:250,000-1:1,000,0001
Allouez — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10122378— —1
Baltic Amygdaloid — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10121577— —1
Baltic — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10243049— —1
Calumet No 2 — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10267537— —1
Carp Lake Mine — https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10080401— —1

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 Michigan.

Map unitAgeLithologyMeasurements
Pms ——1

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