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Calvin Mitchell farm, De Kalb, De Kalb Township, St. Lawrence Co., New York, USAi
Regional Level Types
Calvin Mitchell farmFarm
De Kalb- not defined -
De Kalb TownshipTownship
St. Lawrence Co.County
New YorkState

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Latitude & Longitude (WGS84): 44° 27' 1'' North , 75° 19' 36'' West
Latitude & Longitude (decimal): 44.45028,-75.32667
GeoHash:G#: drfkvguv9
Locality type:Farm
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
Richville320 (2017)6.3km
De Kalb Junction519 (2017)7.4km
Hermon406 (2017)7.9km
Edwards439 (2017)15.2km
Rensselaer Falls322 (2017)15.8km

Talc filled pockets in a calcareous meta sediment.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

5 valid minerals.

Detailed Mineral List:

Formula: Na(AlSi3O8)
Reference: Steven C. Chamberlain & George W. Robinson (2013) Collector's Guide to the Minerals of New York State. Schiffer Books.
Formula: CaMgSi2O6
Reference: Rocks & Minerals 82:472-483
Formula: SiO2
Reference: Rocks & Minerals 82:472-483
Formula: Mg3Si4O10(OH)2
Reference: Rocks & Minerals 82:472-483
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Rocks & Minerals 82:472-483

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Group 9 - Silicates

List of minerals arranged by Dana 8th Edition classification

Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks

List of minerals for each chemical element

H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H TalcMg3Si4O10(OH)2
O DiopsideCaMgSi2O6
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O QuartzSiO2
O TalcMg3Si4O10(OH)2
O AlbiteNa(AlSi3O8)
Na AlbiteNa(AlSi3O8)
Mg DiopsideCaMgSi2O6
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg TalcMg3Si4O10(OH)2
Al AlbiteNa(AlSi3O8)
Si DiopsideCaMgSi2O6
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si QuartzSiO2
Si TalcMg3Si4O10(OH)2
Si AlbiteNa(AlSi3O8)
Ca DiopsideCaMgSi2O6
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2

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: 2759070
Biotite-quartz-plagioclase paragneiss

Age: Mesoproterozoic (1000 - 1600 Ma)

Description: Commonly very low in biotite content, with interbedded feldspathic and biotitic quartzite and amphibolite; sillimanite and garnet common, graphite sporadic.

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:{paragneiss}, Minor:{quartzite,amphibolite}

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]

1200 - 1400 Ma

ID: 3184499
Mesoproterozoic sedimentary rocks

Age: Ectasian (1200 - 1400 Ma)

Lithology: Marble

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


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Robinson G. W.(1990): Famous Mineral Localities: De Kalb, New York; Mineralogical Record: 21(6): 535-544.
Rocks & Minerals (2007): 82: 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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