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:
Thomaston, Litchfield Co., Connecticut, USA

Oldest recorded age at locality: 368.14
Youngest recorded age at locality: 345.11

mindat Locality ID: 23089
mindat URL: http://www.mindat.org/loc-23089.html

Tectonic Settings:

Total number of sublocalities beneath "Thomaston, Litchfield Co., Connecticut, USA": 10
Total number of bottom-level sublocalities: 9

Number of Child Localities: 8
Child Localities:
Lead Mine Brook
Northfield Brook Dam
Reynolds Bridge
Route 109 Roadcut
State Route 8
Thomaston Dam
Waterbury Road Quarry
Whispering Pines Residential Construction Site

Latitude: 41°40'22"N
Longitude: 73°4'36"W
Decimal Degree (lat, lon): 41.672777777778,-73.076666666667
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 Au B Ba Be C Ca Cl Cu F Fe H K Mg Mo Na O P Pb S Si Ti Zn Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousAmphiboleApatiteAragoniteAxiniteBaryteBrookiteCalciteChalcopyriteClay
ClinozoisiteCopiapiteCopperCorundumDiasporeEpidoteFeldsparFluoriteGarnetGypsum
HarmotomeHeulanditeMelanteriteMicaNatroliteNickelineNoneNot in a structural groupPyritePyroxene
QuartzRocksaltRutileScheeliteSphaleriteSpinelStauroliteStilbiteTitaniteTourmaline
Zircon

51 IMA Minerals at location:
Actinolite  (*)Albite  (*)Almandine  (*)Anatase  (*)Annite  (*)
Axinite-(Fe)  (*)Azurite  (*)Baryte  (*)Bertrandite  (*)Brookite  (*)
Calcite  (*)Cerussite  (*)Chalcopyrite  (*)Clinozoisite  (*)Copiapite  (*)
Diopside  (*)Epidote  (*)Fluorapatite  (*)Fluorite  (*)Galena  (*)
Goethite  (*)Gold  (*)Graphite  (*)Grossular  (*)Gypsum  (*)
Harmotome  (*)Hemimorphite  (*)Heulandite-Ca  (*)Hydrozincite  (*)Ilmenite  (*)
Kyanite  (*)Laumontite  (*)Magnetite  (*)Melanterite  (*)Microcline  (*)
Muscovite  (*)Opal  (*)Pyrite  (*)Pyromorphite  (*)Pyrrhotite  (*)
Quartz  (*)Rutile  (*)Schorl  (*)Scolecite  (*)Sillimanite  (*)
Sphalerite  (*)Staurolite  (*)Stilbite-Ca  (*)Titanite  (*)Wulfenite  (*)
Zircon  (*)
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)2368.14345.112199010,1990153419
Albite  (*)FeldsparNa(AlSi3O8)368.14345.113199010,199014,1990158803
Almandine  (*)GarnetFe2+3Al2(SiO4)3368.14345.112199010,1990152353
Anatase  (*)Not in a structural groupTiO2368.14345.112199010,1990152162
Annite  (*)Mica ClayKFe2+3(AlSi3O10)(OH)22199014,199015356
Axinite-(Fe)  (*)AxiniteCa4Fe2+2Al4[B2Si8O30](OH)21199015260
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)2368.14345.1111990105509
Baryte  (*)BaryteBa(SO4)119901511547
Bertrandite  (*)Not in a structural groupBe4Si2O7(OH)21199011606
Brookite  (*)BrookiteTiO21199015700
Calcite  (*)CalciteCa(CO3)2199012,19901527770
Cerussite  (*)AragonitePb(CO3)11990154979
Chalcopyrite  (*)ChalcopyriteCuFeS2119901527198
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)368.14345.112199010,1990151025
Copiapite  (*)CopiapiteFe2+Fe3+4(SO4)6(OH)2·20H2O1199015382
Diopside  (*)PyroxeneCaMgSi2O6368.14345.112199010,1990154135
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)368.14345.112199010,1990158173
Fluorapatite  (*)ApatiteCa5(PO4)3F3199015,199016,1990172740
Fluorite  (*)FluoriteCaF211990159617
Galena  (*)RocksaltPbS119901524243
Goethite  (*)DiasporeFeO(OH)11990157437
Gold  (*)CopperAu119900830554
Graphite  (*)NoneC11990152812
Grossular  (*)GarnetCa3Al2(SiO4)3368.14345.112199010,1990151544
Gypsum  (*)GypsumCa(SO4)·2H2O11990166890
Harmotome  (*)HarmotomeBa2(Si12Al4)O32·12H2O1199015290
Hemimorphite  (*)Not in a structural groupZn4(Si2O7)(OH)2·H2O11990151689
Heulandite-Ca  (*)Heulandite(Ca,Na,K)5(Si27Al9)O72·26H2O1199015246
Hydrozincite  (*)NoneZn5(CO3)2(OH)611990151066
Ilmenite  (*)CorundumFe2+Ti4+O32199015,1990165433
Kyanite  (*)Not in a structural groupAl2OSiO42199015,1990161507
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O368.14345.112199010,1990151271
Magnetite  (*)SpinelFe2+Fe3+2O4119901514899
Melanterite  (*)MelanteriteFe(SO4)·7H2O1199015915
Microcline  (*)FeldsparK(AlSi3O8)368.14345.113199010,199014,1990154924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2368.14345.114199010,199014,199015,19901617380
Opal  (*)AmorphousSiO2·nH2O11990152994
Pyrite  (*)PyriteFeS2368.14345.114199010,199012,199015,19901639462
Pyromorphite  (*)ApatitePb5(PO4)3Cl11990151725
Pyrrhotite  (*)NickelineFe7S811990159056
Quartz  (*)QuartzSiO2368.14345.114199010,199012,199014,19901561156
Rutile  (*)RutileTiO2368.14345.112199010,1990155614
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)11990152705
Scolecite  (*)NatroliteCa(Si3Al2)O10·3H2O368.14345.111199010390
Sillimanite  (*)Not in a structural groupAl2SiO511990151516
Sphalerite  (*)SphaleriteZnS119901521482
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)1199015978
Stilbite-Ca  (*)StilbiteNaCa4(Si27Al9)O72·28H2O1199015268
Titanite  (*)TitaniteCaTi(SiO4)O368.14345.112199010,1990154899
Wulfenite  (*)ScheelitePbMoO411990151655
Zircon  (*)ZirconZr(SiO4)11990155251


10 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-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 

SampleSource LocalityReference URL

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