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McLear pegmatite quarry (Green Hill), De Kalb Township, St. Lawrence Co., New York, USAi
Regional Level Types
McLear pegmatite quarry (Green Hill)Quarry
De Kalb TownshipTownship
St. Lawrence Co.County
New YorkState
USACountry

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Key
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Latitude & Longitude (WGS84): 44° 27' 34'' North , 75° 18' 41'' West
Latitude & Longitude (decimal): 44.45972,-75.31139
GeoHash:G#: drfkyjxut
Locality type:Quarry
Age:1217 ± 17 Ma
Geologic Time:Ectasian
Reference for age:Lupulescu, M. V., Chiarenzelli, J. R., Pullen, A., & Price, J. D. (2010, March). Pegmatites from the Adirondack Mountains, NY: Systematic mineralogy and geochronology. In Geological Society of America Abstracts with Programs (Vol. 42, No. 1, p. 158).
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
De Kalb Junction519 (2017)5.9km
Hermon406 (2017)6.5km
Richville320 (2017)7.9km
Rensselaer Falls322 (2017)14.7km
Edwards439 (2017)15.8km


Operated for feldspar from 1907 till the late 1930s. Shipped more than 120,000 tons feldspar in one decade.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


16 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.; Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
'Apatite'
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
Calcite
Formula: CaCO3
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.; Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
Chalcopyrite
Formula: CuFeS2
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
Danburite
Formula: CaB2Si2O8
Reference: Marian Lupulescu (2010) The Pegmatites of New York. The 37th Rochester Mineralogical Symposium, April 15-18, 2010; Lupulescu, M. V., Chiarenzelli, J. R., Pullen, A., & Price, J. D. (2010, March). Pegmatites from the Adirondack Mountains, NY: Systematic mineralogy and geochronology. In Geological Society of America Abstracts with Programs (Vol. 42, No. 1, p. 158).
Diopside
Formula: CaMgSi2O6
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.; Lupulescu, M. V., Chiarenzelli, J. R., Pullen, A., & Price, J. D. (2010, March). Pegmatites from the Adirondack Mountains, NY: Systematic mineralogy and geochronology. In Geological Society of America Abstracts with Programs (Vol. 42, No. 1, p. 158).; Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
Fluoro-edenite ?
Formula: {Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.; Lupulescu, M. V., Chiarenzelli, J. R., Pullen, A., & Price, J. D. (2010, March). Pegmatites from the Adirondack Mountains, NY: Systematic mineralogy and geochronology. In Geological Society of America Abstracts with Programs (Vol. 42, No. 1, p. 158).
Galena
Formula: PbS
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
Microcline
Formula: K(AlSi3O8)
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.; Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
Pyrite
Formula: FeS2
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
'Pyrochlore Supergroup'
Formula: A2-mD2X6-wZ1-n
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
'Pyrochlore Supergroup var: Betafite (of Hogarth 1977)'
Formula: A2-mD2X6-wZ1+w
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
Quartz
Formula: SiO2
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.; Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
Thorite
Formula: Th(SiO4)
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.
Titanite
Formula: CaTi(SiO4)O
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.; Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Description: Fluorine-rich
Reference: Marian Lupulescu (2010) The Pegmatites of New York. The 37th Rochester Mineralogical Symposium, April 15-18, 2010; Lupulescu, M. V., Chiarenzelli, J. R., Pullen, A., & Price, J. D. (2010, March). Pegmatites from the Adirondack Mountains, NY: Systematic mineralogy and geochronology. In Geological Society of America Abstracts with Programs (Vol. 42, No. 1, p. 158).; Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
Uraninite
Formula: UO2
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.; Lupulescu, M. V., Chiarenzelli, J. R., Pullen, A., & Price, J. D. (2010, March). Pegmatites from the Adirondack Mountains, NY: Systematic mineralogy and geochronology. In Geological Society of America Abstracts with Programs (Vol. 42, No. 1, p. 158).; Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
Zircon
Formula: Zr(SiO4)
Reference: R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Danburite9.FA.65CaB2Si2O8
Diopside9.DA.15CaMgSi2O6
Fluoro-edenite ?9.DE.15{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
Microcline9.FA.30K(AlSi3O8)
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Thorite9.AD.30Th(SiO4)
Titanite9.AG.15CaTi(SiO4)O
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
'var: Betafite (of Hogarth 1977)'-A2-mD2X6-wZ1+w
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
'Pyrochlore Supergroup
var: Betafite (of Hogarth 1977)'
8.2.3.1A2-mD2X6-wZ1+w
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with[Si2O7] with borate groups
Danburite56.3.1.1CaB2Si2O8
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Apatite'-
Fluoro-edenite ?-{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
BBoron
B DanburiteCaB2Si2O8
CCarbon
C CalciteCaCO3
OOxygen
O QuartzSiO2
O AlbiteNa(AlSi3O8)
O MicroclineK(AlSi3O8)
O DiopsideCaMgSi2O6
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O TitaniteCaTi(SiO4)O
O ZirconZr(SiO4)
O CalciteCaCO3
O UraniniteUO2
O ThoriteTh(SiO4)
O DanburiteCaB2Si2O8
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
FFluorine
F Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
NaSodium
Na AlbiteNa(AlSi3O8)
Na Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
MgMagnesium
Mg DiopsideCaMgSi2O6
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
AlAluminium
Al AlbiteNa(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Al Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
SiSilicon
Si QuartzSiO2
Si AlbiteNa(AlSi3O8)
Si MicroclineK(AlSi3O8)
Si DiopsideCaMgSi2O6
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si TitaniteCaTi(SiO4)O
Si ZirconZr(SiO4)
Si ThoriteTh(SiO4)
Si DanburiteCaB2Si2O8
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
SSulfur
S PyriteFeS2
S GalenaPbS
S ChalcopyriteCuFeS2
KPotassium
K MicroclineK(AlSi3O8)
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca DiopsideCaMgSi2O6
Ca TitaniteCaTi(SiO4)O
Ca CalciteCaCO3
Ca DanburiteCaB2Si2O8
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
TiTitanium
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
ZrZirconium
Zr ZirconZr(SiO4)
PbLead
Pb GalenaPbS
ThThorium
Th ThoriteTh(SiO4)
UUranium
U UraniniteUO2

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 Macrostrat.org

Mesoproterozoic
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]

Ectasian
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 Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Schaub, B.M. (1929) A unique feldspar deposit near Dekalb Junction, New York. Economic Geology, 24, 68-89.
Shaub, B. M. (1940). Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York. American Mineralogist: Journal of Earth and Planetary Materials, 25(7), 480-487.
R.W. Munschauer II and D.G. Bailey (2009) The 36th Rochester Mineralogical Symposium, April 23-26, programme abstracts, 27-28.


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