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:
Fairfield Co., Connecticut, USA

Oldest recorded age at locality: 434.43
Youngest recorded age at locality: 333.5

mindat Locality ID: 3697
mindat URL: http://www.mindat.org/loc-3697.html

Tectonic Settings:

Total number of sublocalities beneath "Fairfield Co., Connecticut, USA": 101
Total number of bottom-level sublocalities: 75

Number of Child Localities: 21
Child Localities:
Bethel
Bridgeport
Brookfield
Danbury
Darien
Easton
Fairfield
Greenwich
Monroe
New Canaan
Newtown
Norwalk
Redding (Reading)
Ridgefield
Shelton
Stamford
Stratford
Trumbull
Weston
Westport
Wilton

Latitude: 41°14'7"N
Longitude: 73°22'51"W
Decimal Degree (lat, lon): 41.235277777778,-73.380833333333

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.

Acanthite	Alunite	Amorphous	Amphibole	Apatite	Aragonite	Arrojadite	Arsenic	Arseniosiderite	Arsenopyrite
Atacamite	Autunite	Axinite	Baryte	Beryl	Bismutite	Brookite	Calcite	Cancrinite-sodalite	Chabazite
Chalcopyrite	Childrenite	Chlorite	Clay	Clinozoisite	Cobaltite	Columbite	Copper	Corundum	Danburite
Devilline	Diaspore	Epidote	Fairfieldite	Feldspar	Fillowite	Fluorite	Gadolinite	Garnet	Gypsum
Halotrichite	Harmotome	Heulandite	Humite	Hureaulite	Iron	Kaolinite	Lepidocrocite	Malachite	Marcasite
Melanterite	Meta-autunite	Mica	Milarite	Molybdenite	Monazite	Natrolite	Nickeline	None	Not in a structural group
Olivine	Pectolite	Phenakite	Phosphuranylite	Prehnite	Pyrite	Pyroxene	Quartz	Reddingite	Rhodonite
Rocksalt	Rutile	Scapolite	Scheelite	Sepiolite	Serpentine	Smectite-vermiculite	Sodalite	Sphalerite	Spinel
Starkeyite	Staurolite	Stibnite	Stilbite	Sulphur	Talc	Titanite	Topaz	Tourmaline	Tungstite
Vesuvianite	Vivianite	Wagnerite	Wollastonite	Wurtzite	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: Ag Al As B Ba Be Bi C Ca Cd Ce Cl Co Cr Cu F Fe H K Li Mg Mn Mo Na Nb Ni O P Pb S Si Sr Ta Th Ti U W Y Zn Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Acanthite Alunite Amorphous Amphibole Apatite Aragonite Arrojadite Arsenic Arseniosiderite Arsenopyrite
Atacamite Autunite Axinite Baryte Beryl Bismutite Brookite Calcite Cancrinite-sodalite Chabazite
Chalcopyrite Childrenite Chlorite Clay Clinozoisite Cobaltite Columbite Copper Corundum Danburite
Devilline Diaspore Epidote Fairfieldite Feldspar Fillowite Fluorite Gadolinite Garnet Gypsum
Halotrichite Harmotome Heulandite Humite Hureaulite Iron Kaolinite Lepidocrocite Malachite Marcasite
Melanterite Meta-autunite Mica Milarite Molybdenite Monazite Natrolite Nickeline None Not in a structural group
Olivine Pectolite Phenakite Phosphuranylite Prehnite Pyrite Pyroxene Quartz Reddingite Rhodonite
Rocksalt Rutile Scapolite Scheelite Sepiolite Serpentine Smectite-vermiculite Sodalite Sphalerite Spinel
Starkeyite Staurolite Stibnite Stilbite Sulphur Talc Titanite Topaz Tourmaline Tungstite
Vesuvianite Vivianite Wagnerite Wollastonite Wurtzite Zircon

165 IMA Minerals at location:

Acanthite ()*	Actinolite ()*	Albite ()*	Almandine ()*	Anatase ()*
Anglesite ()*	Anhydrite ()*	Annite ()*	Antigorite ()*	Aragonite ()*
Arsenopyrite ()*	Atacamite ()*	Augite ()*	Aurichalcite ()*	Autunite ()*
Axinite-(Fe) ()*	Azurite ()*	Babingtonite ()*	Baryte ()*	Bavenite ()*
Bertrandite ()*	Beryl ()*	Bismite ()*	Bismuth ()*	Bismuthinite ()*
Bismutite ()*	Bornite ()*	Brookite ()*	Calcite ()*	Celestine ()*
Cerussite ()*	Chabazite-Ca ()*	Chalcopyrite ()*	Chondrodite ()*	Chromite ()*
Chrysoberyl ()*	Chrysotile ()*	Clinochlore ()*	Clinozoisite ()*	Cobaltite ()*
Columbite-(Fe) ()*	Copper ()*	Corundum ()*	Cuprite ()*	Danburite ()*
Datolite ()*	Devilline ()*	Diaspore ()*	Dickinsonite-(KMnNa) ()*	Diopside ()*
Dolomite ()*	Dravite ()*	Elbaite ()*	Enstatite ()*	Eosphorite ()*
Epidote ()*	Erythrite ()*	Eucryptite ()*	Fairfieldite ()*	Ferberite ()*
Fillowite ()*	Fluorapatite ()*	Fluorite ()*	Forsterite ()*	Galena ()*
Goethite ()*	Graphite ()*	Greenockite ()*	Grossular ()*	Gypsum ()*
Harmotome ()*	Helvine ()*	Hematite ()*	Heulandite-Ca ()*	Hureaulite ()*
Hydroxylapatite ()*	Hydrozincite ()*	Ilmenite ()*	Iron ()*	Jarosite ()*
Kaolinite ()*	Kyanite ()*	Langite ()*	Laumontite ()*	Lepidocrocite ()*
Linnaeite ()*	Lithiophilite ()*	Magnesio-hornblende ()*	Magnetite ()*	Malachite ()*
Marcasite ()*	Margarite ()*	Marialite ()*	Melanterite ()*	Mesolite ()*
Meta-autunite ()*	Metaswitzerite ()*	Metatorbernite ()*	Microcline ()*	Milarite ()*
Mitridatite ()*	Molybdenite ()*	Monazite-(Ce) ()*	Montebrasite ()*	Montmorillonite ()*
Muscovite ()*	Nantokite ()*	Natrolite ()*	Natrophilite ()*	Nickeline ()*
Opal ()*	Orthoclase ()*	Pectolite ()*	Phlogopite ()*	Phosphuranylite ()*
Pickeringite ()*	Prehnite ()*	Purpurite ()*	Pyrite ()*	Pyromorphite ()*
Pyrrhotite ()*	Quartz ()*	Reddingite ()*	Rhodochrosite ()*	Rosasite ()*
Rozenite ()*	Rutile ()*	Samarskite-(Y) ()*	Scheelite ()*	Schorl ()*
Scorodite ()*	Sepiolite ()*	Siderite ()*	Sillimanite ()*	Silver ()*
Smithsonite ()*	Spessartine ()*	Sphalerite ()*	Spinel ()*	Spodumene ()*
Staurolite ()*	Stilbite-Ca ()*	Sulphur ()*	Taenite ()*	Talc ()*
Tantalite-(Fe) ()*	Tantalite-(Mn) ()*	Tetrataenite ()*	Thorite ()*	Titanite ()*
Topaz ()*	Torbernite ()*	Tremolite ()*	Triphylite ()*	Triploidite ()*
Troilite ()*	Tungstite ()*	Uraninite ()*	Uranophane-α ()*	Vesuvianite ()*
Vivianite ()*	Wollastonite ()*	Wulfenite ()*	Zircon ()*	Zoisite ()*

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
Acanthite ()*	Acanthite	Ag₂S			3	198738,198781,198791	2793
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	369	333.5	9	198712,198717,198736,198744,198745,198761,198768,198785,198786	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)	369	363	34	198700,198710,198712,198713,198715,198716,198717,198722,198731,198732,198735,198736,198737,198741,198745,198748,198750,198753,198754,198757,198763,198764,198766,198767,198770,198772,198778,198779,198783,198785,198786,198789,198794,198798	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	369	363	15	198700,198710,198712,198719,198725,198731,198738,198761,198763,198764,198765,198775,198786,198793,198797	2353
Anatase ()*	Not in a structural group	TiO₂			8	198712,198730,198754,198768,198777,198779,198790,198791	2162
Anglesite ()*	Baryte	Pb(SO₄)			2	198712,198781	2734
Anhydrite ()*	Not in a structural group	Ca(SO₄)			1	198779	1588
Annite ()*	Mica Clay	KFe²⁺₃(AlSi₃O₁₀)(OH)₂	369	363	6	198700,198707,198741,198761,198763,198786	356
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			1	198777	708
Aragonite ()*	Aragonite	Ca(CO₃)			7	198706,198712,198714,198715,198779,198785,198786	3250
Arsenopyrite ()*	Arsenopyrite	FeAsS			7	198712,198743,198744,198745,198785,198796,198799	9052
Atacamite ()*	Atacamite	Cu₂Cl(OH)₃			1	198776	544
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆			6	198705,198712,198717,198732,198775,198794	2060
Aurichalcite ()*	None	(Zn,Cu)₅(CO₃)₂(OH)₆			1	198786	919
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	369	363	1	198763	1272
Axinite-(Fe) ()*	Axinite	Ca₄Fe²⁺₂Al₄[B₂Si₈O₃₀](OH)₂			1	198786	260
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			2	198776,198786	5509
Babingtonite ()*	Rhodonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)			1	198704	161
Baryte ()*	Baryte	Ba(SO₄)			3	198714,198776,198785	11547
Bavenite ()*	None	Ca₄Be_2+xAl_2-xSi₉O_26-x(OH)_2+x (x = 0 to 1)			1	198786	255
Bertrandite ()*	Not in a structural group	Be₄Si₂O₇(OH)₂	369	363	9	198700,198705,198710,198712,198748,198763,198770,198781,198791	606
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	369	363	14	198700,198705,198707,198710,198712,198736,198741,198748,198763,198770,198781,198785,198786,198790	4286
Bismite ()*	None	Bi₂O₃			1	198739	214
Bismuth ()*	Arsenic	Bi	369	363	6	198739,198744,198763,198785,198786,198791	1966
Bismuthinite ()*	Stibnite	Bi₂S₃			3	198739,198781,198786	1935
Bismutite ()*	Bismutite	Bi₂O₂(CO₃)	369	363	4	198700,198763,198781,198786	716
Bornite ()*	None	Cu₅FeS₄			1	198785	5516
Brookite ()*	Brookite	TiO₂			3	198785,198790,198791	700
Calcite ()*	Calcite	Ca(CO₃)	369	363	25	198699,198706,198708,198709,198711,198712,198714,198717,198719,198743,198745,198754,198756,198757,198760,198761,198763,198767,198768,198777,198779,198783,198785,198786,198791	27770
Celestine ()*	Baryte	Sr(SO₄)			1	198714	1252
Cerussite ()*	Aragonite	Pb(CO₃)	369	363	7	198700,198705,198708,198712,198763,198781,198791	4979
Chabazite-Ca ()*	Chabazite	Ca₂[Al₄Si₈O₂₄]·13H₂O	369	363	2	198754,198763	310
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	369	333.5	12	198706,198712,198714,198719,198741,198758,198761,198768,198779,198785,198786,198799	27198
Chondrodite ()*	Humite	Mg₅(SiO₄)₂F₂			4	198705,198712,198717,198768	285
Chromite ()*	Spinel	Fe²⁺Cr₂O₄			1	198794	3902
Chrysoberyl ()*	Olivine	BeAl₂O₄			1	198712	321
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			2	198712,198768	951
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈			9	198714,198745,198753,198781,198783,198785,198786,198789,198790	1756
Clinozoisite ()*	Clinozoisite Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)			8	198712,198732,198747,198767,198783,198785,198786,198789	1025
Cobaltite ()*	Cobaltite	CoAsS			1	198786	966
Columbite-(Fe) ()*	Columbite	Fe²⁺Nb₂O₆	369	363	1	198763	518
Copper ()*	Copper	Cu			3	198776,198785,198794	3846
Corundum ()*	Corundum	Al₂O₃			2	198747,198754	1797
Cuprite ()*	Not in a structural group	Cu₂O			2	198776,198786	2970
Danburite ()*	Danburite	CaB₂Si₂O₈			3	198713,198715,198718	148
Datolite ()*	Gadolinite	CaB(SiO₄)(OH)			2	198712,198717	498
Devilline ()*	Devilline	CaCu₄(SO₄)₂(OH)₆·3H₂O			1	198786	366
Diaspore ()*	Diaspore	AlO(OH)			1	198785	481
Dickinsonite-(KMnNa) ()*	Arrojadite	K(NaMn)CaNa₃AlMn₁₃(PO₄)₁₂(OH)₂	369	363	3	198705,198712,198763	26
Diopside ()*	Pyroxene	CaMgSi₂O₆			8	198712,198714,198717,198754,198767,198785,198786,198794	4135
Dolomite ()*	None	CaMg(CO₃)₂			7	198705,198709,198712,198715,198768,198786,198791	9895
Dravite ()*	Tourmaline	NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)			2	198700,198786	648
Elbaite ()*	Tourmaline	Na(Al_1.5Li_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	369	363	2	198712,198763	520
Enstatite ()*	Pyroxene	Mg₂Si₂O₆			2	198785,198794	944
Eosphorite ()*	Childrenite	Mn²⁺Al(PO₄)(OH)₂·H₂O	369	363	1	198763	128
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	434.43	404.08	12	198712,198726,198732,198736,198745,198747,198753,198768,198778,198785,198786,198791	8173
Erythrite ()*	Vivianite	Co₃(AsO₄)₂·8H₂O			1	198786	814
Eucryptite ()*	Phenakite	LiAlSiO₄	369	363	1	198763	29
Fairfieldite ()*	Fairfieldite	Ca₂Mn²⁺(PO₄)₂·2H₂O	369	363	1	198763	72
Ferberite ()*	Columbite	Fe²⁺(WO₄)			2	198785,198786	551
Fillowite ()*	Fillowite	Na₃CaMn²⁺₁₁(PO₄)₉	369	363	1	198763	14
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	369	363	13	198700,198705,198712,198715,198719,198741,198753,198754,198763,198770,198783,198785,198786	2740
Fluorite ()*	Fluorite	CaF₂	369	363	12	198710,198745,198763,198776,198783,198784,198785,198786,198788,198789,198790,198791	9617
Forsterite ()*	Olivine	Mg₂(SiO₄)	369	333.5	6	198712,198713,198715,198717,198761,198794	1188
Galena ()*	Rocksalt	PbS			13	198708,198712,198743,198744,198756,198758,198771,198776,198785,198786,198791,198796,198799	24243
Goethite ()*	Diaspore	FeO(OH)	369	363	6	198763,198778,198779,198785,198786,198791	7437
Graphite ()*	None	C	369	333.5	7	198713,198714,198717,198739,198761,198768,198785	2812
Greenockite ()*	Wurtzite	CdS	369	363	3	198712,198763,198791	717
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃			4	198699,198767,198785,198786	1544
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O			5	198714,198768,198785,198786,198790	6890
Harmotome ()*	Harmotome	Ba₂(Si₁₂Al₄)O₃₂·12H₂O			1	198766	290
Helvine ()*	Sodalite Cancrinite-sodalite	Be₃Mn²⁺₄(SiO₄)₃S			1	198779	237
Hematite ()*	Corundum	Fe₂O₃	369	363	7	198700,198719,198731,198756,198763,198768,198785	14640
Heulandite-Ca ()*	Heulandite	(Ca,Na,K)₅(Si₂₇Al₉)O₇₂·26H₂O			2	198712,198786	246
Hureaulite ()*	Hureaulite	Mn²⁺₅(PO₃OH)₂(PO₄)₂·4H₂O	369	363	1	198763	125
Hydroxylapatite ()*	Apatite	Ca₅(PO₄)₃OH	369	363	1	198763	367
Hydrozincite ()*	None	Zn₅(CO₃)₂(OH)₆			1	198786	1066
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	369	363	9	198712,198713,198716,198754,198763,198768,198785,198786,198794	5433
Iron ()*	Iron	Fe			1	198794	1089
Jarosite ()*	Alunite	KFe³⁺₃(SO₄)₂(OH)₆			2	198786,198791	2228
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄			2	198746,198757	5591
Kyanite ()*	Not in a structural group	Al₂OSiO₄			5	198712,198723,198747,198754,198768	1507
Langite ()*	None	Cu₄(SO₄)(OH)₆·2H₂O			1	198786	593
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	434.43	404.08	5	198712,198726,198754,198768,198786	1271
Lepidocrocite ()*	Lepidocrocite	Fe³⁺O(OH)			1	198778	581
Linnaeite ()*	Spinel	Co²⁺Co³⁺₂S₄			1	198786	249
Lithiophilite ()*	Olivine	LiMn²⁺(PO₄)	369	363	2	198712,198763	155
Magnesio-hornblende ()*	Amphibole	Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂			2	198785,198786	238
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	369	363	10	198706,198712,198719,198761,198763,198768,198777,198779,198786,198794	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			6	198745,198768,198776,198779,198785,198786	12537
Marcasite ()*	Marcasite	FeS₂	369	363	7	198727,198744,198763,198766,198778,198785,198786	5674
Margarite ()*	Mica Clay	CaAl₂Si₂Al₂O₁₀(OH)₂			2	198785,198786	168
Marialite ()*	Scapolite	Na₄Al₃Si₉O₂₄Cl			3	198783,198785,198786	139
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O			3	198766,198785,198786	915
Mesolite ()*	Natrolite	Na₂Ca₂(Si₉Al₆)O₃₀·8H₂O			1	198766	425
Meta-autunite ()*	Meta-autunite	Ca(UO₂)₂(PO₄)₂·6H₂O	369	363	3	198700,198763,198770	388
Metaswitzerite ()*	None	Mn²⁺₃(PO₄)₂·4H₂O	369	363	2	198712,198763	22
Metatorbernite ()*	None	Cu(UO₂)₂(PO₄)₂·8H₂O	369	363	1	198763	443
Microcline ()*	Feldspar	K(AlSi₃O₈)	369	363	31	198700,198707,198710,198711,198712,198714,198715,198717,198719,198731,198732,198734,198735,198737,198741,198743,198745,198746,198748,198750,198757,198761,198763,198764,198768,198770,198772,198775,198785,198786,198798	4924
Milarite ()*	Milarite	KCa₂(Be₂AlSi₁₂)O₃₀·H₂O			1	198786	156
Mitridatite ()*	Arseniosiderite	Ca₂Fe³⁺₃O₂(PO₄)₃·3H₂O	369	363	1	198763	129
Molybdenite ()*	Molybdenite	MoS₂			5	198705,198712,198717,198732,198786	5800
Monazite-(Ce) ()*	Monazite	Ce(PO₄)			1	198754	945
Montebrasite ()*	None	LiAl(PO₄)(OH)	369	363	1	198763	200
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O	369	363	1	198763	1508
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	369	366	33	198700,198707,198710,198712,198714,198716,198719,198722,198725,198727,198731,198732,198734,198736,198741,198745,198746,198753,198754,198757,198763,198764,198768,198770,198772,198778,198783,198784,198785,198786,198788,198789,198798	17380
Nantokite ()*	Sphalerite	CuCl			1	198776	35
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O			2	198754,198766	1236
Natrophilite ()*	Olivine	NaMn²⁺(PO₄)	369	363	1	198763	5
Nickeline ()*	Nickeline	NiAs			1	198738	633
Opal ()*	Amorphous	SiO₂·nH₂O	369	363	8	198700,198712,198719,198763,198768,198770,198785,198786	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)			8	198710,198712,198713,198717,198735,198753,198768,198778	2349
Pectolite ()*	Pectolite	NaCa₂Si₃O₈(OH)			1	198753	363
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂			9	198711,198712,198714,198717,198718,198768,198783,198785,198786	2273
Phosphuranylite ()*	Phosphuranylite	KCa(H₃O)₃(UO₂)₇(PO₄)₄O₄·8H₂O	369	363	1	198763	182
Pickeringite ()*	Halotrichite	MgAl₂(SO₄)₄·22H₂O			2	198785,198786	265
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂			2	198754,198786	1898
Purpurite ()*	Olivine	Mn³⁺(PO₄)	369	363	1	198763	80
Pyrite ()*	Pyrite	FeS₂	369	363	30	198700,198706,198708,198712,198713,198714,198716,198717,198719,198727,198735,198736,198737,198743,198744,198754,198756,198758,198760,198761,198763,198778,198779,198783,198785,198786,198789,198790,198791,198799	39462
Pyromorphite ()*	Apatite	Pb₅(PO₄)₃Cl			5	198700,198705,198712,198781,198791	1725
Pyrrhotite ()*	Nickeline	Fe₇S₈			11	198705,198712,198714,198719,198738,198739,198744,198768,198783,198785,198786	9056
Quartz ()*	Quartz	SiO₂	434.43	363	53	198700,198707,198710,198712,198713,198714,198715,198716,198717,198719,198722,198725,198726,198727,198730,198731,198732,198734,198735,198736,198737,198741,198743,198744,198745,198748,198750,198753,198754,198756,198757,198758,198760,198761,198763,198764,198767,198768,198770,198771,198772,198778,198779,198783,198784,198785,198786,198787,198788,198789,198791,198798,198799	61156
Reddingite ()*	Reddingite	Mn²⁺₃(PO₄)₂·3H₂O	369	363	1	198763	24
Rhodochrosite ()*	Calcite	Mn(CO₃)	369	363	1	198763	1711
Rosasite ()*	Malachite	CuZn(CO₃)(OH)₂			2	198776,198786	454
Rozenite ()*	Starkeyite	Fe²⁺(SO₄)·4H₂O			1	198786	293
Rutile ()*	Rutile	TiO₂			10	198712,198713,198732,198753,198754,198768,198774,198785,198786,198791	5614
Samarskite-(Y) ()*	Columbite	YFe³⁺Nb₂O₈	369	363	1	198763	353
Scheelite ()*	Scheelite	Ca(WO₄)			8	198714,198739,198783,198785,198786,198789,198790,198791	4894
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	369	363	19	198700,198707,198710,198712,198719,198731,198732,198734,198747,198748,198763,198764,198768,198770,198772,198778,198785,198786,198798	2705
Scorodite ()*	None	Fe³⁺(AsO₄)·2H₂O			1	198739	1153
Sepiolite ()*	Sepiolite Clay	Mg₄Si₆O₁₅(OH)₂·6H₂O			2	198712,198714	241
Siderite ()*	Calcite	Fe(CO₃)			4	198783,198785,198786,198791	6417
Sillimanite ()*	Not in a structural group	Al₂SiO₅			6	198712,198725,198729,198754,198764,198768	1516
Silver ()*	Copper	Ag			1	198791	5186
Smithsonite ()*	Calcite	Zn(CO₃)			2	198708,198786	2473
Spessartine ()*	Garnet	Mn²⁺₃Al₂(SiO₄)₃			1	198748	1214
Sphalerite ()*	Sphalerite	ZnS	369	363	13	198708,198712,198717,198739,198744,198756,198763,198771,198779,198785,198786,198791,198799	21482
Spinel ()*	Spinel	MgAl₂O₄			1	198717	1934
Spodumene ()*	Pyroxene	LiAlSi₂O₆	369	363	5	198705,198712,198763,198768,198770	688
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)			5	198712,198723,198731,198754,198765	978
Stilbite-Ca ()*	Stilbite	NaCa₄(Si₂₇Al₉)O₇₂·28H₂O			5	198712,198754,198757,198759,198786	268
Sulphur ()*	Sulphur	S			4	198738,198744,198781,198786	2045
Taenite ()*	None	(Ni,Fe)			1	198794	703
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			10	198708,198712,198713,198714,198732,198768,198776,198785,198786,198796	3337
Tantalite-(Fe) ()*	Columbite	Fe²⁺Ta₂O₆			1	198700	99
Tantalite-(Mn) ()*	Columbite	Mn²⁺Ta₂O₆	369	363	1	198763	211
Tetrataenite ()*	None	FeNi			1	198794	116
Thorite ()*	Zircon	Th(SiO₄)			1	198717	1006
Titanite ()*	Titanite	CaTi(SiO₄)O	369	363	15	198712,198713,198714,198717,198718,198719,198753,198754,198763,198767,198768,198779,198785,198786,198790	4899
Topaz ()*	Topaz	Al₂SiO₄F₂			9	198738,198768,198783,198784,198785,198786,198787,198788,198790	1476
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O	369	363	1	198763	1059
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	369	333.5	8	198712,198714,198715,198732,198761,198768,198786,198789	2562
Triphylite ()*	Olivine	LiFe²⁺(PO₄)	369	363	3	198705,198712,198763	313
Triploidite ()*	Wagnerite	Mn²⁺₂(PO₄)(OH)	369	363	1	198763	29
Troilite ()*	None	FeS			1	198794	1044
Tungstite ()*	Tungstite	WO₃·H₂O			1	198785	118
Uraninite ()*	Fluorite	UO₂	367	363	5	198700,198763,198768,198770,198785	2718
Uranophane-α ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O	369	363	5	198700,198741,198763,198768,198770	890
Vesuvianite ()*	Vesuvianite	(Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀			2	198699,198775	1395
Vivianite ()*	Vivianite	Fe²⁺₃(PO₄)₂·8H₂O	369	363	3	198705,198712,198763	636
Wollastonite ()*	Wollastonite	CaSiO₃			2	198705,198712	1247
Wulfenite ()*	Scheelite	PbMoO₄	369	363	4	198700,198763,198781,198791	1655
Zircon ()*	Zircon	Zr(SiO₄)	369	363	13	198700,198712,198713,198717,198719,198735,198737,198746,198748,198763,198768,198770,198786	5251
Zoisite ()*	Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)			2	198712,198738	1025

5 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
USGS-Rb-Sr-01153	434.43	414.43	424.43±10	Rb-Sr	minimum age of metamorphic crystallization	whole rock			251457	Exit 24 Interstate Highway 95, Fairfield, Fairfield Co., Connecticut, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-01154	424.08	404.08	414.08±10	Rb-Sr	minimum age of metamorphic crystallization	whole rock			251457	Exit 24 Interstate Highway 95, Fairfield, Fairfield Co., Connecticut, USA		USGS-Rb-Sr		USGS-Rb-Sr
Alexandra-0194	337.5	333.5	335.5 ± 2.0	Ar-Ar	Age of pegmatite	muscovite	14Dw3	Muscovite	275695	Branchville, Redding (Reading), Fairfield Co., Connecticut, USA	Branchville	Bradley et al. (2016)	10.3749/canmin.1600035	CM54_945
Alexandra-0318	367	363	367-363	U-Pb	Age of pegmatite	uraninite		Uraninite	6816	Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA	Branchville	Spooner and Fairbairn (1970)	10.1130/0016-7606(1970)81[3663:RORAOG]2.0.CO;2	GSAB81_3663
Alexandra-0319	369	366	369-366	K-Ar	Age of pegmatite	muscovite		Muscovite	6816	Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA	Branchville	Spooner and Fairbairn (1970)	10.1130/0016-7606(1970)81[3663:RORAOG]2.0.CO;2	GSAB81_3663

Sample	Source Locality	Reference URL
R040066	Redding (Reading), Fairfield Co., Connecticut, USA	https://rruff.info/R040066

All locality data graciously provided by mindat.org

All age data...