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Wilton, Hillsborough Co., New Hampshire, USA

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Latitude & Longitude (WGS84): 42° 50' 36'' North , 71° 44' 6'' West
Latitude & Longitude (decimal): 42.8433333333, -71.735

The town of Wilton was officially incorporated in 1762.

Mineral List

Mineral list contains entries from the region specified including sub-localities

22 valid minerals.

Regional Geology

This information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This data will improve over time as more accurate maps and data sets are added.

Silurian-Devonian358.9 - 443.8 MaSilurian-Devonian sedimentary rocks

Sedimentary rocks

Early Devonian393.3 - 419.2 MaSpaulding Tonalite

Major:: {quartz diorite},Minor:: {tonalite},Incidental:: {granodiorite, granite}

Spaulding Tonalite (Spaulding Quartz Diorite of Fowler-Billings, 1949) - Weakly foliated to nonfoliated, spotted biotite quartz diorite, tonalite, granodiorite, and granite; garnet and muscovite may or may not be present.

Part of the New Hampshire Plutonic Suite (Late to Early Devonian) - Includes synkinematic and postkinematic granitoids related to the Acadian orogeny. Ages range from 410 to 365 Ma. New Hampshire Plutonic Suite: Kearsarge pluton = 393+/-5 Rb/Sr per NH028. Blackwater pluton = 398+/-? U/Pb, monazite per NH030. Pratt Pond pluton = 280+/-6 U/Pb, zircon, 272+/-2 U/Pb, monazite (J.N. Aleinikoff, oral commun., Dec. 1994). 365+/-? U/Pb, zircon, 365+/-? U/Pb, monazite (J.N. Aleinikoff, oral commun., May 1995). Quartz syenite dike (point within formation) = 159 K/Ar per NH037.

Silurian419.2 - 443.8 MaSilurian sedimentary


References for regional geology:

Data provided by

Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .

USGS compilers. State geologic map data. State Maps.

Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.

Localities in this Region

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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