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:
Portland, Middlesex Co., Connecticut, USA

Oldest recorded age at locality: 235
Youngest recorded age at locality: 227

mindat Locality ID: 3710
mindat URL: http://www.mindat.org/loc-3710.html

Tectonic Settings:

Total number of sublocalities beneath "Portland, Middlesex Co., Connecticut, USA": 20
Total number of bottom-level sublocalities: 18

Number of Child Localities: 13
Child Localities:
Andrews Quarry (old Hale Quarry; Grandfather Andrews Quarry)
Appletree Lane
Bordonaro Quarry
Case Quarries
Collins Hill
Gotta-Walden Prospect
Gotta-Wannerstrom Quarry
Hale Quarry (Andrews Quarry; Glastonbury Quarry)
Nike Prospect
Pelton's Quarry
Penfield Quarry (Oak Leaf Quarry)
Synnott Quarry
Walden Gem Quarry

Latitude: 41°37'3"N
Longitude: 72°35'23"W
Decimal Degree (lat, lon): 41.6175,-72.589722222222
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: Ag Al As B Be Bi C Ca Ce Cs Cu F Fe H K Li Mg Mn Mo Na Nb O P Pb S Sc Si Sn Ta Ti U W Y Zn Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousAmphiboleAnalcimeApatiteAragoniteArrojaditeArseniosideriteArsenopyriteAutuniteBeryl
BismutiteCalciteChalcopyriteChildreniteChloriteClayClinozoisiteColumbiteCorundumDiaspore
EpidoteEpsomiteFairfielditeFeldsparFluoriteGadoliniteGarnetGismondineGypsumHalotrichite
HureauliteKaoliniteLöllingiteMalachiteMelanteriteMeliliteMeta-autuniteMicaMolybdeniteMonazite
NickelineNoneNot in a structural groupOlivinePhenakitePhosphuranylitePyritePyroxeneQuartzRocksalt
RutileScheeliteSmectite-vermiculiteSphaleriteSpinelSpurrite-AfwilliteStauroliteStibniteSulphurTitanite
TopazTourmalineTripliteWarditeWollastoniteZircon

119 IMA Minerals at location:
Actinolite  (*)Albite  (*)Almandine  (*)Analcime  (*)Anatase  (*)
Annite  (*)Anorthite  (*)Aragonite  (*)Arsenopyrite  (*)Augelite  (*)
Augite  (*)Autunite  (*)Bavenite  (*)Bazzite  (*)Bertrandite  (*)
Beryl  (*)Bismite  (*)Bismuthinite  (*)Bismutite  (*)Bismutoferrite  (*)
Bityite  (*)Brazilianite  (*)Calcite  (*)Cassiterite  (*)Chalcopyrite  (*)
Clinozoisite  (*)Columbite-(Fe)  (*)Cookeite  (*)Cordierite  (*)Cuprobismutite  (*)
Dickinsonite-(KMnNa)  (*)Diopside  (*)Elbaite  (*)Eosphorite  (*)Epidote  (*)
Epsomite  (*)Fairfieldite  (*)Ferrimolybdite  (*)Fluorapatite  (*)Fluorite  (*)
Foitite  (*)Gahnite  (*)Galena  (*)Gehlenite  (*)Gobbinsite  (*)
Goethite  (*)Graphite  (*)Grossular  (*)Groutite  (*)Gypsum  (*)
Hematite  (*)Heterosite  (*)Hureaulite  (*)Hydroxylapatite  (*)Hydroxylherderite  (*)
Ilmenite  (*)Ishikawaite  (*)Kaolinite  (*)Kyanite  (*)Lacroixite  (*)
Larnite  (*)Liandratite  (*)Lithiophilite  (*)Löllingite  (*)Magnesio-hornblende  (*)
Magnetite  (*)Malachite  (*)Masutomilite  (*)Melanterite  (*)Meta-autunite  (*)
Metatorbernite  (*)Microcline  (*)Mitridatite  (*)Molybdenite  (*)Monazite-(Ce)  (*)
Montebrasite  (*)Montmorillonite  (*)Moraesite  (*)Muscovite  (*)Natrophilite  (*)
Opal  (*)Parsonsite  (*)Petalite  (*)Phenakite  (*)Phosphuranylite  (*)
Pickeringite  (*)Pollucite  (*)Purpurite  (*)Pyrite  (*)Pyrrhotite  (*)
Quartz  (*)Rhodochrosite  (*)Rutile  (*)Samarskite-(Y)  (*)Scheelite  (*)
Schorl  (*)Sicklerite  (*)Siderite  (*)Sillimanite  (*)Spessartine  (*)
Sphalerite  (*)Spodumene  (*)Spurrite  (*)Staurolite  (*)Sulphur  (*)
Tantalite-(Mn)  (*)Titanite  (*)Topaz  (*)Torbernite  (*)Tremolite  (*)
Triphylite  (*)Triplite  (*)Uraninite  (*)Uranophane-α  (*)Wardite  (*)
Wodginite  (*)Wollastonite  (*)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)22352272199162,1991653419
Albite  (*)FeldsparNa(AlSi3O8)23522714199157,199159,199160,199163,199165,199166,199168,199169,199170,199171,199172,199173,199175,1991768803
Almandine  (*)GarnetFe2+3Al2(SiO4)323522710199159,199160,199163,199165,199166,199168,199171,199172,199173,1991762353
Analcime  (*)AnalcimeNa(AlSi2O6)·H2O23522711991661627
Anatase  (*)Not in a structural groupTiO223522711991662162
Annite  (*)Mica ClayKFe2+3(AlSi3O10)(OH)223522710199157,199160,199163,199165,199166,199169,199171,199173,199174,199176356
Anorthite  (*)FeldsparCa(Al2Si2O8)23522711991661036
Aragonite  (*)AragoniteCa(CO3)2352272199165,1991663250
Arsenopyrite  (*)ArsenopyriteFeAsS2352273199157,199166,1991719052
Augelite  (*)NoneAl2(PO4)(OH)3235227119916679
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O623522711991662060
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O2352277199157,199160,199166,199169,199171,199173,1991761272
Bavenite  (*)NoneCa4Be2+xAl2-xSi9O26-x(OH)2+x (x = 0 to 1)2352271199166255
Bazzite  (*)BerylBe3(Sc,Fe3+,Mg)2Si6O18·Na0.32·nH2O235227119916651
Bertrandite  (*)Not in a structural groupBe4Si2O7(OH)22352273199165,199166,199173606
Beryl  (*)BerylBe3Al2Si6O1823522714199157,199159,199160,199163,199165,199166,199168,199169,199171,199172,199173,199174,199175,1991764286
Bismite  (*)NoneBi2O31199160214
Bismuthinite  (*)StibniteBi2S32199160,1991731935
Bismutite  (*)BismutiteBi2O2(CO3)3199160,199172,199173716
Bismutoferrite  (*)KaoliniteFe3+2Bi(SiO4)2(OH)119916051
Bityite  (*)Mica ClayCaLiAl2(Si2BeAl)O10(OH)2235227119916631
Brazilianite  (*)Not in a structural groupNaAl3(PO4)2(OH)4235227119916659
Calcite  (*)CalciteCa(CO3)2352273199162,199165,19916627770
Cassiterite  (*)RutileSnO22352272199166,1991765171
Chalcopyrite  (*)ChalcopyriteCuFeS22352273199160,199166,19917127198
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)23522711991661025
Columbite-(Fe)  (*)ColumbiteFe2+Nb2O62352277199157,199159,199160,199166,199171,199174,199176518
Cookeite  (*)Chlorite Clay(Al,Li)3Al2(Si,Al)4O10(OH)82352271199166181
Cordierite  (*)BerylMg2Al4Si5O182352273199160,199165,1991661008
Cuprobismutite  (*)NoneCu8AgBi13S24119916043
Dickinsonite-(KMnNa)  (*)ArrojaditeK(NaMn)CaNa3AlMn13(PO4)12(OH)2235227119916626
Diopside  (*)PyroxeneCaMgSi2O62352273199162,199165,1991664135
Elbaite  (*)TourmalineNa(Al1.5Li1.5)Al6(Si6O18)(BO3)3(OH)3(OH)2352273199165,199166,199176520
Eosphorite  (*)ChildreniteMn2+Al(PO4)(OH)2·H2O2352271199166128
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)4199158,199160,199162,1991638173
Epsomite  (*)EpsomiteMg(SO4)·7H2O2352271199166484
Fairfieldite  (*)FairfielditeCa2Mn2+(PO4)2·2H2O235227119916672
Ferrimolybdite  (*)NoneFe3+2(Mo6+O4)3·7H2O2199157,199171345
Fluorapatite  (*)ApatiteCa5(PO4)3F23522711199157,199159,199160,199163,199165,199166,199168,199169,199171,199173,1991762740
Fluorite  (*)FluoriteCaF22352273199165,199166,1991699617
Foitite  (*)Tourmaline   (Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH)235227119916675
Gahnite  (*)SpinelZnAl2O42199172,199173445
Galena  (*)RocksaltPbS235227119916624243
Gehlenite  (*)MeliliteCa2Al(SiAl)O72352271199166114
Gobbinsite  (*)GismondineNa5(Si11Al5)O32·11H2O235227119916617
Goethite  (*)DiasporeFeO(OH)2352272199160,1991667437
Graphite  (*)NoneC23522711991662812
Grossular  (*)GarnetCa3Al2(SiO4)32352273199162,199165,1991661544
Groutite  (*)DiasporeMn3+O(OH)235227119916672
Gypsum  (*)GypsumCa(SO4)·2H2O2352272199166,1991766890
Hematite  (*)CorundumFe2O3235227119916614640
Heterosite  (*)OlivineFe3+(PO4)1199157204
Hureaulite  (*)HureauliteMn2+5(PO3OH)2(PO4)2·4H2O2352271199166125
Hydroxylapatite  (*)ApatiteCa5(PO4)3OH2352271199166367
Hydroxylherderite  (*)GadoliniteCaBe(PO4)(OH)2352271199166119
Ilmenite  (*)CorundumFe2+Ti4+O311991625433
Ishikawaite  (*)Columbite(U,Fe,Y)NbO4119917424
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)423522711991665591
Kyanite  (*)Not in a structural groupAl2OSiO42352272199166,1991671507
Lacroixite  (*)TitaniteNaAl(PO4)F235227119916622
Larnite  (*)Not in a structural groupCa2(SiO4)235227119916648
Liandratite  (*)NoneU6+Nb2O8119916021
Lithiophilite  (*)OlivineLiMn2+(PO4)2352272199165,199166155
Löllingite  (*)LöllingiteFeAs22352271199166762
Magnesio-hornblende  (*)Amphibole   Ca2(Mg4Al)(Si7Al)O22(OH)22352271199166238
Magnetite  (*)SpinelFe2+Fe3+2O42352274199163,199166,199173,19917414899
Malachite  (*)MalachiteCu2(CO3)(OH)2119915712537
Masutomilite  (*)MicaKLiAlMn2+(Si3Al)O10(F,OH)2235227119916612
Melanterite  (*)MelanteriteFe(SO4)·7H2O2352272199166,199171915
Meta-autunite  (*)Meta-autuniteCa(UO2)2(PO4)2·6H2O2352275199160,199163,199166,199171,199176388
Metatorbernite  (*)NoneCu(UO2)2(PO4)2·8H2O3199160,199163,199171443
Microcline  (*)FeldsparK(AlSi3O8)23522715199157,199159,199160,199163,199165,199166,199168,199169,199170,199171,199172,199173,199174,199175,1991764924
Mitridatite  (*)ArseniosideriteCa2Fe3+3O2(PO4)3·3H2O2352271199166129
Molybdenite  (*)MolybdeniteMoS22352274199157,199162,199166,1991715800
Monazite-(Ce)  (*)MonaziteCe(PO4)2352273199157,199160,199166945
Montebrasite  (*)NoneLiAl(PO4)(OH)2352273199165,199166,199176200
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O2352273199166,199171,1991761508
Moraesite  (*)NoneBe2(PO4)(OH)·4H2O235227119916635
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)223522714199157,199159,199160,199163,199165,199166,199168,199169,199170,199171,199173,199174,199175,19917617380
Natrophilite  (*)OlivineNaMn2+(PO4)23522711991665
Opal  (*)AmorphousSiO2·nH2O2352277199160,199163,199166,199169,199171,199173,1991762994
Parsonsite  (*)NonePb2(UO2)(PO4)2235227119916663
Petalite  (*)Not in a structural groupLiAlSi4O102352271199166124
Phenakite  (*)PhenakiteBe2(SiO4)2352271199166326
Phosphuranylite  (*)PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4·8H2O1199160182
Pickeringite  (*)HalotrichiteMgAl2(SO4)4·22H2O2352272199165,199166265
Pollucite  (*)AnalcimeCs(Si2Al)O6·nH2O2352272199166,199176140
Purpurite  (*)OlivineMn3+(PO4)235227119916680
Pyrite  (*)PyriteFeS22352277199160,199163,199165,199166,199168,199169,19917139462
Pyrrhotite  (*)NickelineFe7S82352272199166,1991719056
Quartz  (*)QuartzSiO223522717199157,199158,199159,199160,199162,199163,199165,199166,199168,199169,199170,199171,199172,199173,199174,199175,19917661156
Rhodochrosite  (*)CalciteMn(CO3)2352272199165,1991661711
Rutile  (*)RutileTiO223522711991665614
Samarskite-(Y)  (*)ColumbiteYFe3+Nb2O83199160,199163,199173353
Scheelite  (*)ScheeliteCa(WO4)23522711991664894
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)23522713199157,199159,199160,199163,199165,199166,199167,199169,199170,199171,199172,199173,1991762705
Sicklerite  (*)OlivineLiMn2+(PO4)235227119916666
Siderite  (*)CalciteFe(CO3)23522711991666417
Sillimanite  (*)Not in a structural groupAl2SiO511991671516
Spessartine  (*)GarnetMn2+3Al2(SiO4)32352273199166,199173,1991761214
Sphalerite  (*)SphaleriteZnS2352273199157,199165,19916621482
Spodumene  (*)PyroxeneLiAlSi2O62352273199165,199166,199176688
Spurrite  (*)Spurrite-AfwilliteCa5(SiO4)2(CO3)235227119916654
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)2352272199166,199167978
Sulphur  (*)SulphurS2352272199166,1991762045
Tantalite-(Mn)  (*)ColumbiteMn2+Ta2O62352272199166,199176211
Titanite  (*)TitaniteCaTi(SiO4)O2352273199158,199162,1991664899
Topaz  (*)TopazAl2SiO4F22352272199166,1991761476
Torbernite  (*)NoneCu(UO2)2(PO4)2·12H2O4199157,199160,199171,1991731059
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)223522711991662562
Triphylite  (*)OlivineLiFe2+(PO4)1199157313
Triplite  (*)TripliteMn2+2(PO4)F2352271199166233
Uraninite  (*)FluoriteUO22352278199157,199159,199160,199165,199166,199171,199173,1991762718
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O2352276199157,199160,199166,199171,199173,199176890
Wardite  (*)WarditeNaAl3(PO4)2(OH)4·2H2O235227119916658
Wodginite  (*)ColumbiteMn2+Sn4+Ta2O82352272199166,19917678
Wollastonite  (*)WollastoniteCaSiO323522711991661247
Zircon  (*)ZirconZr(SiO4)2352275199157,199160,199166,199173,1991765251
Zoisite  (*)EpidoteCa2Al3[Si2O7][SiO4]O(OH)2352272199165,1991661025


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
Alexandra-0276235227231±4Rb-SrAge of pegmatite      217860Strickland Pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USAStrickland pegmatiteBrookins et al. (1969)10.1007/BF00372402CMP22_157 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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