|Latitude & Longitude (WGS84):||43° 51' 15'' North , 71° 9' 15'' West|
|Latitude & Longitude (decimal):||43.85417,-71.15417|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
Hydrothermal fault breccia deposit mined for lead, silver, zinc and iron. The mine opened in 1826 when the area was a part of the town of Eaton, and so older references call it the Eaton lead mine. Madison became a separate town in 1852.
In 1870 the mine was operated by the Carroll County Lead and Zinc Mining Company. Twenty-two men were employed at that time, eleven above ground and eleven below ground. (Fogg, 1874)
The mine operated intermittently until 1918.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
29 valid minerals.
This geological map and associated 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 does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Devonian - Silurian|
358.9 - 443.8 Ma
|Paleozoic intrusive rocks|
Age: Paleozoic (358.9 - 443.8 Ma)
Lithology: Intrusive igneous rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
407.6 - 410.8 Ma
|Littleton Formation, undivided|
Age: Early Devonian (407.6 - 410.8 Ma)
Stratigraphic Name: Littleton Formation
Description: Gray metapelite and metawacke and subordinate metavolcanic rocks; generally, but not everywhere, conformable with underlying Fitch or Madrid Formations. Fossiliferous in western New Hampshire.
Comments: Part of the Central Maine Composite Terrane (Central Maine Trough) - Variably metamorphosed sedimentary and volcanic rocks of greenschist to granulite facies, locally migmatized. Area includes structural belts between the Monroe fault on the west and the Campbell Hill fault on the east; that is, the Bronson Hill anticlinorium, Piedmont allochthon, Kearsarge-central Maine synclinorium, central New Hampshire anticlinorium, and Rochester-Lebanon (Maine) antiformal synclinorium.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.