Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
McLear Pegmatite Quarry (Green Hill), De Kalb Township, St. Lawrence Co., New York, USA

Oldest recorded age at locality: 1202
Youngest recorded age at locality: 1188

mindat Locality ID: 205171
mindat URL: http://www.mindat.org/loc-205171.html

Tectonic Settings:

Total number of sublocalities beneath "McLear Pegmatite Quarry (Green Hill), De Kalb Township, St. Lawrence Co., New York, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 44°27'34"N
Longitude: 75°18'41"W
Decimal Degree (lat, lon): 44.459444444444,-75.311388888889

AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al B C Ca Cu Fe H K Mg Na O Pb S Si Th Ti U Zr 

Elements from minerals reported directly at this locality: Al B C Ca Cu Fe H K Mg Na O Pb S Si Th Ti U Zr 

Structural Groups for minerals in this locality: 
AmphiboleCalciteChalcopyriteClayDanburiteFeldsparFluoriteMicaNonePyrite
PyroxeneQuartzRocksaltTitaniteZircon

15 IMA Minerals at location:
Albite  (*)Calcite  (*)Chalcopyrite  (*)Danburite  (*)Diopside  (*)
Galena  (*)Microcline  (*)Phlogopite  (*)Pyrite  (*)Quartz  (*)
Thorite  (*)Titanite  (*)Tremolite  (*)Uraninite  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)1202118808803
Calcite  (*)CalciteCa(CO3)12021188027770
Chalcopyrite  (*)ChalcopyriteCuFeS212021188027198
Danburite  (*)DanburiteCaB2Si2O8120211880148
Diopside  (*)PyroxeneCaMgSi2O61202118804135
Galena  (*)RocksaltPbS12021188024243
Microcline  (*)FeldsparK(AlSi3O8)1202118804924
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)21202118802273
Pyrite  (*)PyriteFeS212021188039462
Quartz  (*)QuartzSiO212021188061156
Thorite  (*)ZirconTh(SiO4)1202118801006
Titanite  (*)TitaniteCaTi(SiO4)O1202118804899
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)21202118802562
Uraninite  (*)FluoriteUO21202118802718
Zircon  (*)ZirconZr(SiO4)1202118805251



1 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
Bradley_2012_052120211881195±7U/Pb zircon   Zircon  205171McLear Pegmatite Quarry (Green Hill), De Kalb Township, St. Lawrence Co., New York, USAMcLearMcCauley and Bradley (2014)10.3749/canmin.52.2.183CM52_183 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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