Structural Measurement Atlas
Atlas / States / New Hampshire

New Hampshire strike and dip data

26,863 structural measurements in New Hampshire, digitized from 44 published geologic maps across 7 sources. Every row carries its azimuth, inclination, measurement type, location confidence and the citation of the map it came from.

Open New Hampshire 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 New Hampshire holds:

Measurement typeGeometryMeasurementsShare
Foliation Planar — strike and dip 8,92033%
Other Planar — strike and dip 7,04026%
Joint Planar — strike and dip 5,45920%
Lineation (mineral, stretching) Linear — trend and plunge 2,3939%
Fold hinge / axis Linear — trend and plunge 9724%
Cleavage Planar — strike and dip 7353%
Bedding Planar — strike and dip 5222%
Vein / dike Planar — strike and dip 4252%
Fault plane Planar — strike and dip 217<1%
Slickenline Linear — trend and plunge 180<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
USGS SIM quads (NE) 16,37061%
NGMDB legacy quads 9,40835%
NPS GRI parks 9073%
Vermont Geol. Survey 89<1%
Maine Geol. Survey 86<1%
USGS data releases · MRDS 2<1%
USGS NGMDB GeMS 1<1%

Most-measured published maps

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

Published mapYearScaleMeasurements
BF24KNHVTDAS01— 1:24,0004,376
DASWSTNH24K01— 1:24,0003,226
SIM bedrock quadrangle databases, New England— 1:24,0003,058
Bedrock geologic map of the Windham quadrangle, Rockingham and Hillsborough Counties, New Hampshire1999 1:24,0002,790
DASMAVTNH004— 1:24,0002,008
Bedrock geologic map of the Hubbard Brook Experimental Forest, Grafton County, New Hampshire2000 1:10,0001,595
Bedrock geologic map of the Littleton and Lower Waterford quadrangles, Essex and Caledonia Counties, Vermont, and Grafton County, New Hampshire2018 1:24,0001,549
DASSPRVTNH004— 1:24,0001,537
Bedrock geologic and joint trend map of the Pinardville quadrangle, Hillsborough County, New Hampshire2013 1:24,0001,512
DASSPRVTNH005— 1:24,0001,131
Bedrock geologic map of the Lisbon quadrangle, and parts of the Sugar Hill and East Haverhill quadrangles, Grafton County, New Hampshire2018 1:24,000858
adapted from: Walsh, G.J., 2016, Bedrock geologic map of the Hartland and North Hartland Quadrangles, Windsor County, Vermont, and Sullivan and Grafton Counties, New Hampshire: U.S. Geological Survey, Scientific Investigations Map SIM-3361, scale 1:240002020 24000567
Bedrock geologic map of the Nashua South quadrangle, Hillsborough County, New Hampshire, and Middlesex County, Massachusetts2013 1:24,000480
DASSPRVTNH009— 1:24,000402
adapted from: Walsh, G.J., et.al., 2020, Bedrock geologic map of the Mount Ascutney 7.5- x 15-Minute Quadrangle, Windsor County, Vermont and Sullivan County, New Hampshire: U.S. Geological Survey, Scientific Investigations Map SIM-3440, scale 1:240002020 24000340

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 New Hampshire.

Map unitAgeLithologyMeasurements
Op ——1,042
Schist member of the Littleton Formation Dl Lower DevonianMetasedimentary rock921
Dl ——858
Sru ——738
Dbg ——717
Scq ——555
Sulfidic schist member of the Partridge Formation Op OrdovicianMetasedimentary rock550
Dkg ——522
Srr ——447
Undifferentiated conglomerate and quartzite member of the Clough Quartzite Scq SilurianMetasedimentary rock424
Sr ——408
Feldspathic quartzite, granofels, and metapelite member of the Gile Mountain Formation Dgq Lower DevonianQuartzite378

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