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:
Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA

Oldest recorded age at locality: 274
Youngest recorded age at locality: 272

mindat Locality ID: 253774
mindat URL: http://www.mindat.org/loc-253774.html

Tectonic Settings:

Total number of sublocalities beneath "Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
Great Hill Cobalt Mines
Great Hill Pond Brook Pegmatite
State Forest Quarry #2 (State Forest No. 2 Mica Mine)

Latitude: 41°34'27"N
Longitude: 72°33'13"W
Decimal Degree (lat, lon): 41.574166666667,-72.553611111111
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 Be C Ca Co Cu F Fe H K Li Mg Mn Na Nb Ni O P Pb S Si U Zn Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousAmphiboleApatiteArsenopyriteArthuriteAutuniteBerylCalciteChalcopyriteClay
ColumbiteCopperDiasporeFairfielditeFeldsparGadoliniteGarnetHalotrichiteKaoliniteLöllingite
LaueiteMalachiteMelanteriteMicaNickelineNoneNot in a structural groupOlivinePhosphophyllitePyrite
QuartzRocksaltSphaleriteSpinelStauroliteStrunziteTourmalineVivianiteZircon

51 IMA Minerals at location:
Actinolite  (*)Albite  (*)Almandine  (*)Annabergite  (*)Annite  (*)
Anorthite  (*)Arsenopyrite  (*)Autunite  (*)Bertrandite  (*)Beryl  (*)
Chalcopyrite  (*)Columbite-(Fe)  (*)Diadochite  (*)Erythrite  (*)Ferrisicklerite  (*)
Fluorapatite  (*)Gahnite  (*)Galena  (*)Goethite  (*)Gold  (*)
Grossular  (*)Heterosite  (*)Hydroxylapatite  (*)Hydroxylherderite  (*)Kaolinite  (*)
Laueite  (*)Löllingite  (*)Ludlamite  (*)Malachite  (*)Melanterite  (*)
Messelite  (*)Microcline  (*)Muscovite  (*)Nickeline  (*)Opal  (*)
Gersdorffite-Pa3  (*)Phosphophyllite  (*)Pickeringite  (*)Pyrite  (*)Pyrrhotite  (*)
Quartz  (*)Schorl  (*)Scorodite  (*)Siderite  (*)Sphalerite  (*)
Staurolite  (*)Strunzite  (*)Triphylite  (*)Vivianite  (*)Whitmoreite  (*)
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)227427211990673419
Albite  (*)FeldsparNa(AlSi3O8)2742723199067,199068,1990698803
Almandine  (*)GarnetFe2+3Al2(SiO4)32742722199067,1990692353
Annabergite  (*)VivianiteNi3(AsO4)2·8H2O2742721199067445
Annite  (*)Mica ClayKFe2+3(AlSi3O10)(OH)22742722199068,199069356
Anorthite  (*)FeldsparCa(Al2Si2O8)27427211990671036
Arsenopyrite  (*)ArsenopyriteFeAsS2742722199067,1990699052
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O27427211990691272
Bertrandite  (*)Not in a structural groupBe4Si2O7(OH)22742721199069606
Beryl  (*)BerylBe3Al2Si6O1827427211990694286
Chalcopyrite  (*)ChalcopyriteCuFeS22742722199067,19906927198
Columbite-(Fe)  (*)ColumbiteFe2+Nb2O62742721199069518
Diadochite  (*)AmorphousFe3+2(PO4)(SO4)(OH)·6H2O274272119906981
Erythrite  (*)VivianiteCo3(AsO4)2·8H2O2742721199067814
Ferrisicklerite  (*)OlivineLi1-x(Fe3+,Mn2+)(PO4)2742721199069108
Fluorapatite  (*)ApatiteCa5(PO4)3F27427211990692740
Gahnite  (*)SpinelZnAl2O42742721199067445
Galena  (*)RocksaltPbS2742722199067,19906924243
Goethite  (*)DiasporeFeO(OH)2742722199067,1990697437
Gold  (*)CopperAu274272119906730554
Grossular  (*)GarnetCa3Al2(SiO4)327427211990671544
Heterosite  (*)OlivineFe3+(PO4)2742721199069204
Hydroxylapatite  (*)ApatiteCa5(PO4)3OH2742721199069367
Hydroxylherderite  (*)GadoliniteCaBe(PO4)(OH)2742721199069119
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)427427211990675591
Laueite  (*)LaueiteMn2+Fe3+2(PO4)2(OH)2·8H2O274272119906970
Löllingite  (*)LöllingiteFeAs22742721199067762
Ludlamite  (*)NoneFe2+3(PO4)2·4H2O274272119906966
Malachite  (*)MalachiteCu2(CO3)(OH)2274272119906912537
Melanterite  (*)MelanteriteFe(SO4)·7H2O2742722199067,199069915
Messelite  (*)FairfielditeCa2Fe2+(PO4)2·2H2O274272119906943
Microcline  (*)FeldsparK(AlSi3O8)2742723199067,199068,1990694924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22742722199067,19906917380
Nickeline  (*)NickelineNiAs2742721199067633
Opal  (*)AmorphousSiO2·nH2O27427211990672994
Gersdorffite-Pa3  (*)PyriteNiAsS2742721199067767
Phosphophyllite  (*)PhosphophylliteZn2Fe2+(PO4)2·4H2O274272119906929
Pickeringite  (*)HalotrichiteMgAl2(SO4)4·22H2O2742722199067,199069265
Pyrite  (*)PyriteFeS22742722199067,19906939462
Pyrrhotite  (*)NickelineFe7S82742722199067,1990699056
Quartz  (*)QuartzSiO22742723199067,199068,19906961156
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)2742722199068,1990692705
Scorodite  (*)NoneFe3+(AsO4)·2H2O27427211990671153
Siderite  (*)CalciteFe(CO3)27427211990696417
Sphalerite  (*)SphaleriteZnS2742722199067,19906921482
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)2742721199067978
Strunzite  (*)StrunziteMn2+Fe3+2(PO4)2(OH)2·6H2O274272119906998
Triphylite  (*)OlivineLiFe2+(PO4)2742721199069313
Vivianite  (*)VivianiteFe2+3(PO4)2·8H2O2742721199069636
Whitmoreite  (*)ArthuriteFe2+Fe3+2(PO4)2(OH)2·4H2O274272119906936
Zircon  (*)ZirconZr(SiO4)27427211990695251


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_069274272273±1U/Pb zircon  YesZircon  6782Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USAAndersonMcCauley and Bradley (2014)10.3749/canmin.52.2.183CM52_183 

SampleSource LocalityReference URL

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