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

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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:
Litchfield Co., Connecticut, USA

Oldest recorded age at locality: 388
Youngest recorded age at locality: 319

mindat Locality ID: 5951
mindat URL: http://www.mindat.org/loc-5951.html

Tectonic Settings:

Total number of sublocalities beneath "Litchfield Co., Connecticut, USA": 119
Total number of bottom-level sublocalities: 83

Number of Child Localities: 24
Child Localities:
Barkhamsted
Bridgewater
Canaan
Colebrook
Cornwall
Goshen
Harwinton
Kent
Litchfield
Morris
New Hartford
New Milford
Norfolk
North Canaan
Plymouth
Roxbury
Salisbury
Sharon
Thomaston
Torrington (Wolcottville)
Washington
Watertown
Winchester
Woodbury

Latitude: 41°45'51"N
Longitude: 73°13'2"W
Decimal Degree (lat, lon): 41.764166666667,-73.217222222222
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 As Au B Ba Be Bi C Ca Cd Ce Cl Cu F Fe H K La Li Mg Mn Mo Na Nb Nd Ni O P Pb S Si Ti U Y Zn Zr 

Elements from minerals reported directly at this locality: Al Ca O Si 

Structural Groups for minerals in this locality: 
AllophaneAmorphousAmphiboleAnalcimeAndalusiteApatiteAragoniteArsenicArseniosideriteArsenopyrite
AutuniteAxiniteBaryteBerauniteBerylBismutiteBrookiteCalciteChabaziteChalcopyrite
ChloriteClayClinozoisiteColumbiteCopiapiteCopperCoronaditeCorundumDiasporeEpidote
FeldsparFluoriteGadoliniteGarnetGypsumHalotrichiteHarmotomeHeulanditeHumiteKaolinite
KieseriteLöllingiteLepidocrociteMalachiteMelanteriteMeta-autuniteMicaMonaziteNatroliteNickeline
NoneNot in a structural groupOlivinePentlanditePhosphuranylitePrehnitePyritePyroxeneQuartzRhabdophane
RhodoniteRockbridgeiteRocksaltRutileScapoliteScheeliteSphaleriteSpinelStauroliteStibnite
StilbiteSulphurTalcTitaniteTourmalineVesuvianiteVivianiteWollastoniteWurtziteZircon

118 IMA Minerals at location:
Actinolite  (*)Albite  (*)Almandine  (*)Analcime  (*)Anatase  (*)
Andalusite  (*)Anhydrite  (*)Annite  (*)Anorthite  (*)Anthophyllite  (*)
Aragonite  (*)Arsenopyrite  (*)Autunite  (*)Axinite-(Fe)  (*)Azurite  (*)
Babingtonite  (*)Baryte  (*)Beraunite  (*)Bertrandite  (*)Beryl  (*)
Bismuth  (*)Bismuthinite  (*)Bismutite  (*)Bornite  (*)Brookite  (*)
Calcite  (*)Cerussite  (*)Chabazite-Ca  (*)Chalcopyrite  (*)Chondrodite  (*)
Chrysocolla  (*)Clinochlore  (*)Clinozoisite  (*)Columbite-(Fe)  (*)Copiapite  (*)
Cordierite  (*)Corundum  (*)Cryptomelane  (*)Cummingtonite  (*)Datolite  (*)
Diopside  (*)Dolomite  (*)Epidote  (*)Fluorapatite  (*)Fluorite  (*)
Galena  (*)Gibbsite  (*)Goethite  (*)Gold  (*)Graphite  (*)
Greenockite  (*)Grossular  (*)Gypsum  (*)Harmotome  (*)Hematite  (*)
Hemimorphite  (*)Heterosite  (*)Heulandite-Ca  (*)Hydrozincite  (*)Ilmenite  (*)
Kaolinite  (*)Kyanite  (*)Laumontite  (*)Lepidocrocite  (*)Löllingite  (*)
Magnesio-hornblende  (*)Magnetite  (*)Malachite  (*)Marialite  (*)Melanterite  (*)
Meta-autunite  (*)Metatorbernite  (*)Microcline  (*)Mitridatite  (*)Monazite-(Ce)  (*)
Muscovite  (*)Natrolite  (*)Opal  (*)Orthoclase  (*)Pentlandite  (*)
Phlogopite  (*)Phosphuranylite  (*)Pickeringite  (*)Prehnite  (*)Pyrite  (*)
Pyrolusite  (*)Pyromorphite  (*)Pyrrhotite  (*)Quartz  (*)Rhabdophane-(La)  (*)
Rhabdophane-(Nd)  (*)Rockbridgeite  (*)Rutile  (*)Sarcolite  (*)Schorl  (*)
Scolecite  (*)Siderite  (*)Sillimanite  (*)Sphalerite  (*)Spinel  (*)
Staurolite  (*)Stilbite-Ca  (*)Sulphur  (*)Synchysite-(Y)  (*)Szomolnokite  (*)
Talc  (*)Titanite  (*)Tremolite  (*)Triphylite  (*)Uraninite  (*)
Uranophane-α  (*)Vesuvianite  (*)Violarite  (*)Vivianite  (*)Wollastonite  (*)
Wulfenite  (*)Zircon  (*)Zoisite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2368.14345.119198925,198952,198956,198975,198979,198984,199010,199015,1990213419
Albite  (*)FeldsparNa(AlSi3O8)38831926198931,198934,198943,198945,198950,198952,198956,198959,198961,198962,198970,198971,198977,198983,198984,198987,198990,199010,199014,199015,199021,199029,199031,199036,199037,1990408803
Almandine  (*)GarnetFe2+3Al2(SiO4)3368.14345.1116198924,198931,198934,198956,198959,198965,198970,198983,198988,198990,198991,198993,199007,199010,199015,1990372353
Analcime  (*)AnalcimeNa(AlSi2O6)·H2O2199037,1990391627
Anatase  (*)Not in a structural groupTiO2368.14345.115198952,198990,199010,199015,1990302162
Andalusite  (*)AndalusiteAl2SiO52198955,1990281310
Anhydrite  (*)Not in a structural groupCa(SO4)11990391588
Annite  (*)Mica ClayKFe2+3(AlSi3O10)(OH)26198931,198970,198971,198983,199014,199015356
Anorthite  (*)FeldsparCa(Al2Si2O8)38831901036
Anthophyllite  (*)Amphibole   Mg2Mg5Si8O22(OH)21198964718
Aragonite  (*)AragoniteCa(CO3)4198936,198956,198992,1990393250
Arsenopyrite  (*)ArsenopyriteFeAsS11989929052
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O2198961,1990311272
Axinite-(Fe)  (*)AxiniteCa4Fe2+2Al4[B2Si8O30](OH)21199015260
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)2368.14345.1111990105509
Babingtonite  (*)RhodoniteCa2Fe2+Fe3+Si5O14(OH)1199039161
Baryte  (*)BaryteBa(SO4)3198979,199015,19903911547
Beraunite  (*)BerauniteFe3+6(PO4)4O(OH)4·6H2O1198952136
Bertrandite  (*)Not in a structural groupBe4Si2O7(OH)24198938,198962,199011,199040606
Beryl  (*)BerylBe3Al2Si6O189198934,198949,198950,198951,198952,198955,198962,198970,1990404286
Bismuth  (*)ArsenicBi11989901966
Bismuthinite  (*)StibniteBi2S32198990,1990401935
Bismutite  (*)BismutiteBi2O2(CO3)2198990,199040716
Bornite  (*)NoneCu5FeS42198971,1989795516
Brookite  (*)BrookiteTiO22199015,199030700
Calcite  (*)CalciteCa(CO3)20198924,198935,198936,198942,198952,198956,198968,198977,198979,198981,198985,198990,198992,199012,199015,199018,199028,199030,199035,19903927770
Cerussite  (*)AragonitePb(CO3)2198992,1990154979
Chabazite-Ca  (*)ChabaziteCa2[Al4Si8O24]·13H2O5198952,198956,198983,199029,199030310
Chalcopyrite  (*)ChalcopyriteCuFeS217198935,198936,198952,198956,198957,198959,198977,198979,198981,198988,198990,198992,199015,199026,199037,199039,19904027198
Chondrodite  (*)HumiteMg5(SiO4)2F24198932,198968,198971,198977285
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O11990373531
Clinochlore  (*)Chlorite ClayMg5Al(AlSi3O10)(OH)87198922,198929,198977,198979,198981,198988,1990281756
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)368.14345.112199010,1990151025
Columbite-(Fe)  (*)ColumbiteFe2+Nb2O61198970518
Copiapite  (*)CopiapiteFe2+Fe3+4(SO4)6(OH)2·20H2O3198990,198992,199015382
Cordierite  (*)BerylMg2Al4Si5O1811989821008
Corundum  (*)CorundumAl2O35198924,198955,198956,198960,1989871797
Cryptomelane  (*)CoronaditeK(Mn4+7Mn3+)O161199001599
Cummingtonite  (*)Amphibole   Mg2Mg5Si8O22(OH)23873491198994327
Datolite  (*)GadoliniteCaB(SiO4)(OH)1199039498
Diopside  (*)PyroxeneCaMgSi2O6368.14345.1111198924,198935,198936,198939,198952,198968,198977,199010,199015,199018,1990214135
Dolomite  (*)NoneCaMg(CO3)26198935,198936,198939,198977,198979,1989819895
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)368.14345.1110198943,198952,198956,198959,198984,199010,199015,199018,199037,1990398173
Fluorapatite  (*)ApatiteCa5(PO4)3F15198934,198952,198956,198959,198962,198970,198979,198990,199015,199016,199017,199021,199026,199028,1990372740
Fluorite  (*)FluoriteCaF23198990,199015,1990399617
Galena  (*)RocksaltPbS7198977,198981,198990,198992,199015,199028,19903924243
Gibbsite  (*)NoneAl(OH)31199001504
Goethite  (*)DiasporeFeO(OH)38734919198935,198936,198939,198941,198952,198954,198956,198976,198992,198994,198996,198997,198998,198999,199000,199001,199002,199005,1990157437
Gold  (*)CopperAu119900830554
Graphite  (*)NoneC3873495198924,198943,198994,199003,1990152812
Greenockite  (*)WurtziteCdS1199028717
Grossular  (*)GarnetCa3Al2(SiO4)3368.14345.116198924,198936,198952,198956,199010,1990151544
Gypsum  (*)GypsumCa(SO4)·2H2O3198935,198988,1990166890
Harmotome  (*)HarmotomeBa2(Si12Al4)O32·12H2O1199015290
Hematite  (*)CorundumFe2O38198953,198956,198959,198988,198992,199006,199018,19903914640
Hemimorphite  (*)Not in a structural groupZn4(Si2O7)(OH)2·H2O11990151689
Heterosite  (*)OlivineFe3+(PO4)1198952204
Heulandite-Ca  (*)Heulandite(Ca,Na,K)5(Si27Al9)O72·26H2O1199015246
Hydrozincite  (*)NoneZn5(CO3)2(OH)62198992,1990151066
Ilmenite  (*)CorundumFe2+Ti4+O39198931,198956,198958,198959,198988,199015,199016,199027,1990285433
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)43198932,198939,1989905591
Kyanite  (*)Not in a structural groupAl2OSiO421198924,198926,198931,198943,198947,198949,198951,198956,198959,198960,198963,198983,198987,198988,199007,199015,199016,199024,199028,199029,1990371507
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O368.14345.115198955,199010,199015,199030,1990391271
Lepidocrocite  (*)LepidocrociteFe3+O(OH)3873491198994581
Löllingite  (*)LöllingiteFeAs22198988,198992762
Magnesio-hornblende  (*)Amphibole   Ca2(Mg4Al)(Si7Al)O22(OH)21198959238
Magnetite  (*)SpinelFe2+Fe3+2O417198924,198926,198931,198937,198945,198952,198956,198957,198972,198974,198975,198988,199006,199015,199023,199028,19903414899
Malachite  (*)MalachiteCu2(CO3)(OH)27198956,198959,198971,198977,198979,198992,19904012537
Marialite  (*)ScapoliteNa4Al3Si9O24Cl1198935139
Melanterite  (*)MelanteriteFe(SO4)·7H2O3198979,198992,199015915
Meta-autunite  (*)Meta-autuniteCa(UO2)2(PO4)2·6H2O4198952,198962,198970,199040388
Metatorbernite  (*)NoneCu(UO2)2(PO4)2·8H2O2198970,199040443
Microcline  (*)FeldsparK(AlSi3O8)38831915198934,198945,198950,198956,198962,198970,198971,198990,199010,199014,199015,199021,199036,199037,1990404924
Mitridatite  (*)ArseniosideriteCa2Fe3+3O2(PO4)3·3H2O1198952129
Monazite-(Ce)  (*)MonaziteCe(PO4)2199029,199040945
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)238831924198934,198945,198950,198952,198956,198962,198963,198970,198971,198987,198988,198990,199007,199010,199014,199015,199016,199021,199024,199028,199030,199036,199037,19904017380
Natrolite  (*)NatroliteNa2(Si3Al2)O10·2H2O11990391236
Opal  (*)AmorphousSiO2·nH2O9198939,198943,198949,198952,198970,198992,199015,199025,1990372994
Orthoclase  (*)FeldsparK(AlSi3O8)11989902349
Pentlandite  (*)Pentlandite(Ni,Fe)9S82198957,1990261512
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)26198935,198936,198968,198977,198979,1989812273
Phosphuranylite  (*)PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4·8H2O1198970182
Pickeringite  (*)HalotrichiteMgAl2(SO4)4·22H2O1199030265
Prehnite  (*)PrehniteCa2Al(Si3Al)O10(OH)211990391898
Pyrite  (*)PyriteFeS2368.14345.1123198935,198936,198952,198956,198957,198960,198968,198979,198981,198988,198990,198991,198992,199010,199012,199015,199016,199018,199021,199028,199030,199037,19903939462
Pyrolusite  (*)RutileMnO22199001,1990023106
Pyromorphite  (*)ApatitePb5(PO4)3Cl11990151725
Pyrrhotite  (*)NickelineFe7S87198952,198957,198979,198988,199015,199026,1990289056
Quartz  (*)QuartzSiO238831947198922,198924,198927,198929,198931,198934,198935,198936,198939,198945,198950,198951,198952,198954,198955,198956,198958,198959,198961,198962,198966,198970,198971,198973,198979,198985,198988,198990,198991,198992,198994,199010,199012,199014,199015,199018,199021,199025,199028,199029,199030,199031,199036,199037,199038,199039,19904061156
Rhabdophane-(La)  (*)RhabdophaneLa(PO4)·H2O119900213
Rhabdophane-(Nd)  (*)RhabdophaneNd(PO4)·H2O119900214
Rockbridgeite  (*)Rockbridgeite(Fe2+0.5Fe3+0.5)2Fe3+3(PO4)3(OH)51198952206
Rutile  (*)RutileTiO2387345.1112198931,198936,198956,198963,198979,198987,198990,198994,199010,199015,199029,1990305614
Sarcolite  (*)NoneNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)11989526
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)38734915198927,198929,198934,198947,198950,198955,198962,198970,198971,198990,198994,199015,199027,199029,1990372705
Scolecite  (*)NatroliteCa(Si3Al2)O10·3H2O368.14345.111199010390
Siderite  (*)CalciteFe(CO3)4198966,198990,198992,1990016417
Sillimanite  (*)Not in a structural groupAl2SiO55198924,198936,198973,199015,1990301516
Sphalerite  (*)SphaleriteZnS8198952,198977,198979,198990,198992,199015,199028,19903021482
Spinel  (*)SpinelMgAl2O42198957,1989711934
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)10198924,198947,198956,198958,198959,198987,198988,199015,199023,199028978
Stilbite-Ca  (*)StilbiteNaCa4(Si27Al9)O72·28H2O6198982,198983,199015,199029,199030,199039268
Sulphur  (*)SulphurS38734911989942045
Synchysite-(Y)  (*)NoneCaY(CO3)2F119895255
Szomolnokite  (*)KieseriteFe(SO4)·H2O1199026139
Talc  (*)Clay TalcMg3Si4O10(OH)27198925,198960,198964,198975,198979,199001,1990243337
Titanite  (*)TitaniteCaTi(SiO4)O368.14345.115198939,198952,199010,199015,1990214899
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)217198932,198935,198936,198942,198946,198952,198956,198968,198975,198977,198978,198979,198981,199018,199021,199024,1990292562
Triphylite  (*)OlivineLiFe2+(PO4)1198952313
Uraninite  (*)FluoriteUO23198970,199031,1990402718
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O3198970,199031,199040890
Vesuvianite  (*)Vesuvianite(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)1038734911989941395
Violarite  (*)SpinelFeNi2S41199026380
Vivianite  (*)VivianiteFe2+3(PO4)2·8H2O3873492198952,198994636
Wollastonite  (*)WollastoniteCaSiO311989361247
Wulfenite  (*)ScheelitePbMoO411990151655
Zircon  (*)ZirconZr(SiO4)8198934,198952,198970,198990,199003,199015,199029,1990315251
Zoisite  (*)EpidoteCa2Al3[Si2O7][SiO4]O(OH)38734911989941025


13 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
USGS-Rb-Sr-03251387349368±19Rb-Srinitial age disturbed by later metamorphismbiotite     254364Clarke Mine, Salisbury District, Salisbury, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04098368.14346.14357.14±11Rb-Srage of intrusionwhole rock     213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04099368.14346.14357.14±11Rb-Srage of intrusionk-feldspar     213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04100368.14346.14357.14±11Rb-Srage of intrusionmuscovite   Muscovite  213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04101367.11345.11356.11±11Rb-Srage of intrusionmuscovite   Muscovite  213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04102368.14346.14357.14±11Rb-Srage of intrusionwhole rock     213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04103367.11345.11356.11±11Rb-Srage of metamorphic crystallizationwhole rock     213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04104367.11345.11356.11±11Rb-Srage of metamorphic crystallizationbiotite     213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04105367.11345.11356.11±11Rb-Srage of metamorphic crystallizationbiotite     213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04106367.11345.11356.11±11Rb-Srage of metamorphic crystallizationwhole rock     213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-04107367.11345.11356.11±11Rb-Srage of metamorphic crystallizationwhole rock     213284Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-05200388378383±5Rb-Srage of intrusionwhole rock     252845Flanders Road (Brushy Hill), Woodbury, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-05201381319350±31Rb-Sr whole rock     252845Flanders Road (Brushy Hill), Woodbury, Litchfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 

SampleSource LocalityReference URL
R050349Litchfield Co., Connecticut, USAhttps://rruff.info/R050349
X050170Canaan, Litchfield Co., Connecticut, USAhttps://rruff.info/X050170

All locality data graciously provided by mindat.org

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