Structural Measurement Atlas
Atlas / States / Vermont

Vermont strike and dip data

36,132 structural measurements in Vermont, digitized from 327 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 Vermont 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 Vermont holds:

Measurement typeGeometryMeasurementsShare
Foliation Planar — strike and dip 14,00339%
Other Planar — strike and dip 9,36026%
Lineation (mineral, stretching) Linear — trend and plunge 3,70410%
Cleavage Planar — strike and dip 3,65710%
Joint Planar — strike and dip 2,9238%
Fold hinge / axis Linear — trend and plunge 7672%
Fault plane Planar — strike and dip 7502%
Bedding Planar — strike and dip 5251%
Vein / dike Planar — strike and dip 3941%
Slickenline Linear — trend and plunge 49<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
Vermont Geol. Survey 19,60254%
USGS SIM quads (NE) 11,97633%
NGMDB legacy quads 2,3657%
USGS NGMDB GeMS 1,4314%
NPS GRI parks 5632%
USGS data releases · MRDS 195<1%

Most-measured published maps

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

Published mapYearScaleMeasurements
Bedrock geologic map Open-File Report GIS packages (quadrangle/town), 43 products, 1994-2017— 1:24,0003,673
USGS— 1:24,0002,729
VGS— 1:24,0002,046
SIM bedrock quadrangle databases, New England— 1:24,0001,682
BF24KNHVTDAS01— 1:24,0001,670
Bedrock geologic map of the Miles Pond and Concord quadrangles, Essex and Caledonia Counties, Vermont, and Grafton County, New Hampshire2018 1:24,0001,276
DASMAVTNH065— 1:24,0001,193
folpt— 240001,118
SIM bedrock quadrangle databases, New England— 1:24,0001,079
schistpt— 240001,015
schistpt— 24000901
all_ductile— 24000889
folpt— 24000843
Wright, S.F., 2015, Late Wisconsin ice sheet flow across northern and central Vermont, USA; Quaternary Science Reviews, Vol 129: 216–228.2024 1:100,000707
britpt— 24000589

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 Vermont.

Map unitAgeLithologyMeasurements
Till Pt PleistoceneGlacial till1,329
Dgqs ——329
Ks Early CretaceousCoarse-grained, intermediate-composition intrusive igneous rock316
Dl ——303
Limestone and schist member of the Waits River Formation DSwl Lower Devonian and Silurian Lower Devonian and SilurianMetasedimentary rock299
Gray phyllite and schist member of the Waits River Formation DSws Lower Devonian and Silurian Lower Devonian and SilurianMetasedimentary rock291
DSws ——287
Gray phyllite and schist member of the Waits River Formation DSws Lower Devonian and upper SilurianMetasedimentary rock224
DSwv ——204
Gray quartzite and metapelite member of the Gile Mountain Formation Dgqs Lower DevonianMetasedimentary rock164
Kch CretaceousContact-metamorphic rock123
Laminated schist and granofels member of the Waits River Formation DSwv Lower Devonian and SilurianHigher-grade regional metamorphic rock of unspecified origin122

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