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:
Tollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex Co., Connecticut, USA

Oldest recorded age at locality: 277.9
Youngest recorded age at locality: 277.9

mindat Locality ID: 23478
mindat URL: http://www.mindat.org/loc-23478.html

Tectonic Settings:

Total number of sublocalities beneath "Tollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex Co., Connecticut, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 41°31'58"N
Longitude: 72°36'37"W
Decimal Degree (lat, lon): 41.532777777778,-72.610277777778
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 Be C Ca Cu F Fe H K Mg Na Nb O P S Si U W Zn Zr 

Elements from minerals reported directly at this locality: Al B Be C Ca Cu F Fe H K Mg Na Nb O P S Si U W Zn Zr 

Structural Groups for minerals in this locality: 
AmphiboleApatiteAutuniteBerylCalciteChalcopyriteClayColumbiteFeldsparFluorite
GarnetMicaNickelineNoneNot in a structural groupPyritePyroxeneQuartzScheeliteSphalerite
TourmalineZircon

25 IMA Minerals at location:
Actinolite  (*)Albite  (*)Almandine  (*)Annite  (*)Autunite  (*)
Bertrandite  (*)Beryl  (*)Calcite  (*)Chalcopyrite  (*)Columbite-(Fe)  (*)
Diopside  (*)Fluorapatite  (*)Fluorite  (*)Microcline  (*)Muscovite  (*)
Pyrite  (*)Pyrrhotite  (*)Quartz  (*)Scheelite  (*)Schorl  (*)
Sphalerite  (*)Torbernite  (*)Uraninite  (*)Uranophane-α  (*)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)2277.9277.903419
Albite  (*)FeldsparNa(AlSi3O8)277.9277.908803
Almandine  (*)GarnetFe2+3Al2(SiO4)3277.9277.902353
Annite  (*)Mica ClayKFe2+3(AlSi3O10)(OH)2277.9277.90356
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O277.9277.901272
Bertrandite  (*)Not in a structural groupBe4Si2O7(OH)2277.9277.90606
Beryl  (*)BerylBe3Al2Si6O18277.9277.904286
Calcite  (*)CalciteCa(CO3)277.9277.9027770
Chalcopyrite  (*)ChalcopyriteCuFeS2277.9277.9027198
Columbite-(Fe)  (*)ColumbiteFe2+Nb2O6277.9277.90518
Diopside  (*)PyroxeneCaMgSi2O6277.9277.904135
Fluorapatite  (*)ApatiteCa5(PO4)3F277.9277.902740
Fluorite  (*)FluoriteCaF2277.9277.909617
Microcline  (*)FeldsparK(AlSi3O8)277.9277.904924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2277.9277.9017380
Pyrite  (*)PyriteFeS2277.9277.9039462
Pyrrhotite  (*)NickelineFe7S8277.9277.909056
Quartz  (*)QuartzSiO2277.9277.9061156
Scheelite  (*)ScheeliteCa(WO4)277.9277.904894
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)277.9277.902705
Sphalerite  (*)SphaleriteZnS277.9277.9021482
Torbernite  (*)NoneCu(UO2)2(PO4)2·12H2O277.9277.901059
Uraninite  (*)FluoriteUO2277.9277.902718
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O277.9277.90890
Zircon  (*)ZirconZr(SiO4)277.9277.905251


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
Mo-00159277.9277.9277.9U-Pb monazite  YesMolybdeniteMo17878Middletown, Middlesex Co., Connecticut, USAMiddletownFenner (1932)10.2475/ajs.s5-23.136.327AJS5_327 

SampleSource LocalityReference URL

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