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Lewis Mine (Cabot Corporation Mine; Lewis NYCO Mine), Willsboro, Essex Co., New York, USAi
Regional Level Types
Lewis Mine (Cabot Corporation Mine; Lewis NYCO Mine)Mine
Willsboro- not defined -
Essex Co.County
New YorkState

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Lock Map
Latitude & Longitude (WGS84):
44° 17' 52'' North , 74° 3' 57'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
Saranac Lake5,274 (2017)6.3km
Lake Placid2,465 (2017)7.0km
North Elba8,474 (2017)10.7km
Paul Smiths671 (2017)21.6km
Wilmington937 (2017)22.3km

A wollastonite occurrence/mine in the town of Lewis in Adirondack Park, near the town of Willsboro.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

3 valid minerals.

Detailed Mineral List:

'Andradite-Grossular Series'
Reference: George Robinson & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals, 82, #6, 472-483.; Rocks & Minerals 82:472-483
Formula: CaMgSi2O6
Reference: P. Cristofono collection; Rocks & Minerals 82:472-483
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: P. Cristofono collection
Formula: CaSiO3
Reference: P. Cristofono collection; Rocks & Minerals 82:472-483
Formula: Zr(SiO4)
Reference: George Robinson & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals, 82, #6, 472-483.; Rocks & Minerals 82:472-483

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
Unclassified Minerals, Rocks, etc.
'Andradite-Grossular Series'-
'Garnet Group'-X3Z2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Single-Width Unbranched Chains, W=1 with chains P=3
Unclassified Minerals, Mixtures, etc.
'Andradite-Grossular Series'-
'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

O WollastoniteCaSiO3
O DiopsideCaMgSi2O6
O Garnet GroupX3Z2(SiO4)3
O ZirconZr(SiO4)
Mg DiopsideCaMgSi2O6
Si WollastoniteCaSiO3
Si DiopsideCaMgSi2O6
Si Garnet GroupX3Z2(SiO4)3
Si ZirconZr(SiO4)
Ca WollastoniteCaSiO3
Ca DiopsideCaMgSi2O6
Zr ZirconZr(SiO4)

Regional Geology

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

1000 - 1600 Ma

ID: 2957575
Metanorthosite and anorthositic gneiss

Age: Mesoproterozoic (1000 - 1600 Ma)

Description: Mafic mineral percentage contoured in northwestern Marcy massif (St. Regis Quadrangle); contour value shown on high side of countoue line. See also Yach, Yack, Yamu.

Comments: Original map source: NYS Museum, NYS Geological Survey, NYS Museum Technology Center, 1999, bedrock geology of NYS data is distributed in ARC/INFOr EXPORT format (with '.e00' extension) in 5 seperate files based on 1970 printed map sheets, scale 1:250,000.

Lithology: Major:{gneiss,metaanorthosite}

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. [133]

1000 - 1200 Ma

ID: 3185442
Mesoproterozoic intrusive rocks

Age: Stenian (1000 - 1200 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. [154]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License


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Robinson, George & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals: 82(6): 472-483.

This page 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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