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

Oldest recorded age at locality: 274
Youngest recorded age at locality: 242.3

mindat Locality ID: 23094
mindat URL: http://www.mindat.org/loc-23094.html

Tectonic Settings:

Total number of sublocalities beneath "East Hampton (Chatham), Middlesex Co., Connecticut, USA": 32
Total number of bottom-level sublocalities: 28

Number of Child Localities: 21
Child Localities:
Airline Railroad
Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine)
Anderson No. 2 Mica Mine
Bailey Prospect
Becker Quarry
Bishop Hill Schorl Locality
Clark Hill Prospect
Cobalt
Enegren Mica Mine (Power Mica Mine)
Eureka Quarry
Halberg Pegmatite Quarries
Hog Hill
Hurd State Park Quarries
Middle Haddam
Nathan Hall Quarry (Clark Hill Quarry)
Pyrite Locality
Slocum Prospect
State Forest Quarry No. 1 (State Forest #1 Quarry; Clark Hill Quarry)
Valli Drive (Cranberry Bog)
Vespa Stone Quarry
Worth And Selden Quarries (Victoria Quarry)

Latitude: 41°33'2"N
Longitude: 72°31'8"W
Decimal Degree (lat, lon): 41.550555555556,-72.518888888889

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The 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.

Allanite	Amorphous	Amphibole	Apatite	Arseniosiderite	Arsenopyrite	Arthurite	Autunite	Bastnäsite	Beryl
Bismutite	Calcite	Chalcopyrite	Clay	Columbite	Copper	Corundum	Covellite	Diaspore	Epidote
Fairfieldite	Feldspar	Fluorite	Gadolinite	Garnet	Gypsum	Halotrichite	Kaolinite	Löllingite	Laueite
Malachite	Marcasite	Melanterite	Meta-autunite	Mica	Monazite	Nickeline	None	Not in a structural group	Olivine
Phosphophyllite	Pyrite	Pyroxene	Quartz	Rhabdophane	Rocksalt	Rutile	Scheelite	Sphalerite	Spinel
Staurolite	Stibnite	Strunzite	Sulphur	Tapiolite	Titanite	Tourmaline	Triplite	Vivianite	Zircon

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 Bi C Ca Ce Co Cu F Fe H K Li Mg Mn Na Nb Ni O P Pb S Si Sn Ta Th Ti U W Y Zn Zr

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

Structural Groups for minerals in this locality:
Allanite Amorphous Amphibole Apatite Arseniosiderite Arsenopyrite Arthurite Autunite Bastnäsite Beryl
Bismutite Calcite Chalcopyrite Clay Columbite Copper Corundum Covellite Diaspore Epidote
Fairfieldite Feldspar Fluorite Gadolinite Garnet Gypsum Halotrichite Kaolinite Löllingite Laueite
Malachite Marcasite Melanterite Meta-autunite Mica Monazite Nickeline None Not in a structural group Olivine
Phosphophyllite Pyrite Pyroxene Quartz Rhabdophane Rocksalt Rutile Scheelite Sphalerite Spinel
Staurolite Stibnite Strunzite Sulphur Tapiolite Titanite Tourmaline Triplite Vivianite Zircon

89 IMA Minerals at location:

Actinolite ()*	Albite ()*	Allanite-(Ce) ()*	Almandine ()*	Annabergite ()*
Annite ()*	Anorthite ()*	Arsenopyrite ()*	Augite ()*	Autunite ()*
Bastnäsite-(Ce) ()*	Bavenite ()*	Bertrandite ()*	Beryl ()*	Bismite ()*
Bismuthinite ()*	Bismutite ()*	Cassiterite ()*	Chalcopyrite ()*	Columbite-(Fe) ()*
Covellite ()*	Cummingtonite ()*	Diadochite ()*	Dravite ()*	Elbaite ()*
Erythrite ()*	Ferrisicklerite ()*	Fluorapatite ()*	Fluorite ()*	Gahnite ()*
Galena ()*	Goethite ()*	Gold ()*	Graphite ()*	Grayite ()*
Grossular ()*	Gypsum ()*	Hematite ()*	Heterosite ()*	Hydroxylapatite ()*
Hydroxylherderite ()*	Ixiolite ()*	Kaolinite ()*	Kyanite ()*	Laueite ()*
Löllingite ()*	Ludlamite ()*	Magnesio-hornblende ()*	Malachite ()*	Marcasite ()*
Melanterite ()*	Messelite ()*	Meta-autunite ()*	Metatorbernite ()*	Microcline ()*
Mitridatite ()*	Monazite-(Ce) ()*	Muscovite ()*	Nickeline ()*	Opal ()*
Gersdorffite-Pa3 ()*	Phosphophyllite ()*	Pickeringite ()*	Pyrite ()*	Pyrrhotite ()*
Quartz ()*	Rutile ()*	Scheelite ()*	Schorl ()*	Scorodite ()*
Siderite ()*	Sillimanite ()*	Spessartine ()*	Sphalerite ()*	Staurolite ()*
Strunzite ()*	Sulphur ()*	Tantalite-(Mn) ()*	Tanteuxenite-(Y) ()*	Tapiolite-(Fe) ()*
Titanite ()*	Torbernite ()*	Triphylite ()*	Triplite ()*	Uraninite ()*
Uranophane-α ()*	Vivianite ()*	Whitmoreite ()*	Zircon ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	274	272	2	199067,199087	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)	274	242.3	20	199058,199060,199061,199062,199063,199064,199065,199067,199068,199069,199070,199071,199074,199075,199078,199081,199083,199084,199086,199087	8803
Allanite-(Ce) ()*	Allanite Epidote	CaCe(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)	274	272	1	199058	706
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	274	242.3	18	199058,199059,199060,199061,199065,199067,199069,199070,199074,199075,199077,199078,199080,199081,199083,199084,199085,199087	2353
Annabergite ()*	Vivianite	Ni₃(AsO₄)₂·8H₂O	274	272	1	199067	445
Annite ()*	Mica Clay	KFe²⁺₃(AlSi₃O₁₀)(OH)₂	274	272	10	199061,199064,199068,199069,199071,199074,199078,199081,199083,199084	356
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	274	272	2	199058,199067	1036
Arsenopyrite ()*	Arsenopyrite	FeAsS	274	272	3	199067,199069,199086	9052
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	274	272	1	199058	2060
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	274	272	3	199069,199081,199083	1272
Bastnäsite-(Ce) ()*	Bastnäsite	Ce(CO₃)F	274	272	1	199058	304
Bavenite ()*	None	Ca₄Be_2+xAl_2-xSi₉O_26-x(OH)_2+x (x = 0 to 1)	274	272	1	199083	255
Bertrandite ()*	Not in a structural group	Be₄Si₂O₇(OH)₂	274	242.3	4	199060,199069,199083,199087	606
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	274	242.3	16	199058,199060,199063,199064,199065,199069,199070,199072,199075,199076,199078,199081,199083,199084,199086,199087	4286
Bismite ()*	None	Bi₂O₃	274	272	1	199083	214
Bismuthinite ()*	Stibnite	Bi₂S₃	274	272	1	199083	1935
Bismutite ()*	Bismutite	Bi₂O₂(CO₃)	274	272	2	199081,199083	716
Cassiterite ()*	Rutile	SnO₂	274	242.3	1	199060	5171
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	274	272	3	199058,199067,199069	27198
Columbite-(Fe) ()*	Columbite	Fe²⁺Nb₂O₆	274	272	4	199069,199081,199083,199084	518
Covellite ()*	Covellite	CuS	274	272	1	199086	4165
Cummingtonite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂	274	272	1	199080	327
Diadochite ()*	Amorphous	Fe³⁺₂(PO₄)(SO₄)(OH)·6H₂O	274	272	1	199069	81
Dravite ()*	Tourmaline	NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	274	272	1	199086	648
Elbaite ()*	Tourmaline	Na(Al_1.5Li_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	274	242.3	2	199060,199071	520
Erythrite ()*	Vivianite	Co₃(AsO₄)₂·8H₂O	274	272	1	199067	814
Ferrisicklerite ()*	Olivine	Li_1-x(Fe³⁺,Mn²⁺)(PO₄)	274	272	1	199069	108
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	274	242.3	10	199058,199060,199061,199064,199069,199070,199074,199078,199081,199083	2740
Fluorite ()*	Fluorite	CaF₂	274	272	2	199058,199083	9617
Gahnite ()*	Spinel	ZnAl₂O₄	274	272	1	199067	445
Galena ()*	Rocksalt	PbS	274	272	2	199067,199069	24243
Goethite ()*	Diaspore	FeO(OH)	274	272	5	199057,199067,199069,199081,199084	7437
Gold ()*	Copper	Au	274	272	1	199067	30554
Graphite ()*	None	C	274	272	2	199057,199064	2812
Grayite ()*	Rhabdophane	(Th,Pb,Ca)(PO₄)·H₂O	274	242.3	1	199060	17
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃	274	272	1	199067	1544
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	274	272	1	199058	6890
Hematite ()*	Corundum	Fe₂O₃	274	272	1	199084	14640
Heterosite ()*	Olivine	Fe³⁺(PO₄)	274	272	1	199069	204
Hydroxylapatite ()*	Apatite	Ca₅(PO₄)₃OH	274	272	1	199069	367
Hydroxylherderite ()*	Gadolinite	CaBe(PO₄)(OH)	274	272	1	199069	119
Ixiolite ()*	Columbite	(Ta_2/3Mn²⁺_1/3)O₂	274	242.3	2	199060,199083	148
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	274	272	5	199057,199058,199067,199076,199083	5591
Kyanite ()*	Not in a structural group	Al₂OSiO₄	274	272	2	199079,199087	1507
Laueite ()*	Laueite	Mn²⁺Fe³⁺₂(PO₄)₂(OH)₂·8H₂O	274	272	1	199069	70
Löllingite ()*	Löllingite	FeAs₂	274	272	2	199067,199081	762
Ludlamite ()*	None	Fe²⁺₃(PO₄)₂·4H₂O	274	272	1	199069	66
Magnesio-hornblende ()*	Amphibole	Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂	274	242.3	0		238
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	274	272	1	199069	12537
Marcasite ()*	Marcasite	FeS₂	274	272	1	199086	5674
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O	274	272	3	199058,199067,199069	915
Messelite ()*	Fairfieldite	Ca₂Fe²⁺(PO₄)₂·2H₂O	274	272	1	199069	43
Meta-autunite ()*	Meta-autunite	Ca(UO₂)₂(PO₄)₂·6H₂O	274	272	3	199078,199081,199087	388
Metatorbernite ()*	None	Cu(UO₂)₂(PO₄)₂·8H₂O	274	272	2	199081,199087	443
Microcline ()*	Feldspar	K(AlSi₃O₈)	274	242.3	20	199058,199060,199061,199062,199063,199064,199065,199067,199068,199069,199070,199071,199074,199075,199078,199081,199083,199084,199086,199087	4924
Mitridatite ()*	Arseniosiderite	Ca₂Fe³⁺₃O₂(PO₄)₃·3H₂O	274	242.3	1	199060	129
Monazite-(Ce) ()*	Monazite	Ce(PO₄)	274	242.3	3	199060,199078,199081	945
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	274	242.3	21	199058,199060,199061,199062,199064,199065,199067,199069,199070,199071,199072,199074,199075,199076,199077,199078,199081,199083,199084,199086,199087	17380
Nickeline ()*	Nickeline	NiAs	274	272	1	199067	633
Opal ()*	Amorphous	SiO₂·nH₂O	274	272	4	199067,199081,199083,199087	2994
Gersdorffite-Pa3 ()*	Pyrite	NiAsS	274	272	1	199067	767
Phosphophyllite ()*	Phosphophyllite	Zn₂Fe²⁺(PO₄)₂·4H₂O	274	272	1	199069	29
Pickeringite ()*	Halotrichite	MgAl₂(SO₄)₄·22H₂O	274	272	3	199058,199067,199069	265
Pyrite ()*	Pyrite	FeS₂	274	242.3	8	199057,199058,199060,199067,199069,199070,199083,199087	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	274	272	4	199058,199067,199069,199087	9056
Quartz ()*	Quartz	SiO₂	274	242.3	22	199057,199058,199060,199061,199062,199063,199064,199065,199067,199068,199069,199070,199071,199074,199075,199078,199079,199081,199083,199084,199086,199087	61156
Rutile ()*	Rutile	TiO₂	274	272	1	199083	5614
Scheelite ()*	Scheelite	Ca(WO₄)	274	272	4	199058,199077,199083,199087	4894
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	274	242.3	14	199060,199061,199064,199068,199069,199070,199071,199074,199075,199077,199078,199081,199083,199084	2705
Scorodite ()*	None	Fe³⁺(AsO₄)·2H₂O	274	272	1	199067	1153
Siderite ()*	Calcite	Fe(CO₃)	274	272	1	199069	6417
Sillimanite ()*	Not in a structural group	Al₂SiO₅	274	272	1	199058	1516
Spessartine ()*	Garnet	Mn²⁺₃Al₂(SiO₄)₃	274	242.3	2	199060,199081	1214
Sphalerite ()*	Sphalerite	ZnS	274	272	3	199058,199067,199069	21482
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)	274	272	3	199067,199080,199081	978
Strunzite ()*	Strunzite	Mn²⁺Fe³⁺₂(PO₄)₂(OH)₂·6H₂O	274	272	1	199069	98
Sulphur ()*	Sulphur	S	274	272	1	199082	2045
Tantalite-(Mn) ()*	Columbite	Mn²⁺Ta₂O₆	274	242.3	1	199060	211
Tanteuxenite-(Y) ()*	Columbite	Y(TaTi)O₆	274	272	1	199083	16
Tapiolite-(Fe) ()*	Tapiolite	Fe²⁺Ta₂O₆	274	272	1	199081	88
Titanite ()*	Titanite	CaTi(SiO₄)O	274	272	2	199058,199083	4899
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O	274	272	2	199081,199084	1059
Triphylite ()*	Olivine	LiFe²⁺(PO₄)	274	272	1	199069	313
Triplite ()*	Triplite	Mn²⁺₂(PO₄)F	274	242.3	1	199060	233
Uraninite ()*	Fluorite	UO₂	274	272	5	199081,199083,199084,199086,199087	2718
Uranophane-α ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O	274	272	2	199081,199087	890
Vivianite ()*	Vivianite	Fe²⁺₃(PO₄)₂·8H₂O	274	272	1	199069	636
Whitmoreite ()*	Arthurite	Fe²⁺Fe³⁺₂(PO₄)₂(OH)₂·4H₂O	274	272	1	199069	36
Zircon ()*	Zircon	Zr(SiO₄)	274	272	5	199060,199069,199081,199083,199086	5251

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Sample Num	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Alexandra-0185	273.63	273.03	273.23 ±.0.3	U-Pb	Age of pegmatite	zircon	10AMC3	Zircon	6782	Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA	Anderson	Bradley et al. (2016)	10.3749/canmin.1600035	CM54_945
Alexandra-0186	244.1	242.3	243.2 ± 0.9	Ar-Ar	Age of pegmatite	muscovite	10AMC3	Muscovite	6782	Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA	Anderson	Bradley et al. (2016)	10.3749/canmin.1600035	CM54_945
Bradley_2012_069	274	272	273±1	U/Pb		zircon		Zircon	6782	Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA	Anderson	McCauley and Bradley (2014)	10.3749/canmin.52.2.183	CM52_183

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...