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.

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.

Ajoite	Amorphous	Analcime	Baryte	Beryl	Blödite	Calcite	Chalcanthite	Chalcopyrite	Clay
Columbite	Copper	Coquimbite	Corundum	Diaspore	Enargite	Epsomite	Feldspar	Fluorite	Fritzscheite
Garnet	Gypsum	Hewettite	Hexahydrite	Johannite	Kaolinite	Kieserite	Malachite	Mica	Molybdenite
None	Not in a structural group	Pascoite	Pyrite	Quartz	Ramsdellite	Rocksalt	Schoepite	Sphalerite	Stannite
Starkeyite	Straczekite	Sulphur	Topaz	Volborthite	Wurtzite	Zippeite	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 Ba Be C Ca Cl Cu F Fe H K Mg Mn Mo N Na Nb O Pb S Se Si U V Y Zn Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Ajoite Amorphous Analcime Baryte Beryl Blödite Calcite Chalcanthite Chalcopyrite Clay
Columbite Copper Coquimbite Corundum Diaspore Enargite Epsomite Feldspar Fluorite Fritzscheite
Garnet Gypsum Hewettite Hexahydrite Johannite Kaolinite Kieserite Malachite Mica Molybdenite
None Not in a structural group Pascoite Pyrite Quartz Ramsdellite Rocksalt Schoepite Sphalerite Stannite
Starkeyite Straczekite Sulphur Topaz Volborthite Wurtzite Zippeite Zircon

98 IMA Minerals at location:

Albite ()*	Almandine ()*	Analcime ()*	Andersonite ()*	Ankerite ()*
Ansermetite ()*	Azurite ()*	Barnesite ()*	Baryte ()*	Becquerelite ()*
Beryl ()*	Blödite ()*	Boltwoodite ()*	Bornite ()*	Calcite ()*
Carnotite ()*	Chalcocite ()*	Chalcopyrite ()*	Coffinite ()*	Coquimbite ()*
Corvusite ()*	Dickthomssenite ()*	Dolomite ()*	Doloresite ()*	Enargite ()*
Epsomite ()*	Fluorite ()*	Fourmarierite ()*	Galena ()*	Gatewayite ()*
Goethite ()*	Gold ()*	Gypsum ()*	Halite ()*	Hematite ()*
Hewettite ()*	Hexahydrite ()*	Hummerite ()*	Hydropascoite ()*	Johannite ()*
Kaolinite ()*	Kegginite ()*	Kieserite ()*	Lasalite ()*	Löweite ()*
Lumsdenite ()*	Luzonite ()*	Magnesiopascoite ()*	Malachite ()*	Martyite ()*
Mesaite ()*	Metahewettite ()*	Metarossite ()*	Metatyuyamunite ()*	Mirabilite ()*
Molybdenite ()*	Montroseite ()*	Morrisonite ()*	Munirite ()*	Muscovite ()*
Nahcolite ()*	Navajoite ()*	Nitratine ()*	Opal ()*	Orthoclase ()*
Packratite ()*	Paramontroseite ()*	Pascoite ()*	Pentahydrite ()*	Pharmacolite ()*
Picropharmacolite ()*	Postite ()*	Pyrite ()*	Quartz ()*	Rauvite ()*
Roscoelite ()*	Rossite ()*	Samarskite-(Y) ()*	Schoepite ()*	Schröckingerite ()*
Selenium ()*	Sherwoodite ()*	Siderite ()*	Starkeyite ()*	Steigerite ()*
Sulphur ()*	Tenorite ()*	Thénardite ()*	Topaz ()*	Trona ()*
Tyuyamunite ()*	Uraninite ()*	Uranophane-α ()*	Uranopilite ()*	Vanarsite ()*
Vanoxite ()*	Zippeite ()*	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
Albite ()*	Feldspar	Na(AlSi₃O₈)			1	192301	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃			2	192301,192310	2353
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O			1	192285	1627
Andersonite ()*	Not in a structural group	Na₂Ca(UO₂)(CO₃)₃·5-6H₂O			1	192234	47
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂			1	192264	3092
Ansermetite ()*	Not in a structural group	Mn²⁺V⁵⁺₂O₆·4H₂O			1	192234	9
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			4	192213,192295,192306,192308	5509
Barnesite ()*	Hewettite	Na₂V⁵⁺₆O₁₆·3H₂O			1	192578	15
Baryte ()*	Baryte	Ba(SO₄)	1488.77	1408.77	7	192213,192255,192261,192264,192295,192305,192309	11547
Becquerelite ()*	None	Ca(UO₂)₆O₄(OH)₆·8H₂O	106	80	1	192344	92
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈			3	192299,192301,192303	4286
Blödite ()*	Blödite	Na₂Mg(SO₄)₂·4H₂O			1	192598	130
Boltwoodite ()*	None	(K,Na)(UO₂)(SiO₃OH)·1.5H₂O	1488.77	1408.77	1	192295	67
Bornite ()*	None	Cu₅FeS₄			4	192213,192290,192291,192292	5516
Calcite ()*	Calcite	Ca(CO₃)	1488.77	1408.77	13	192213,192219,192234,192255,192264,192290,192291,192292,192295,192305,192308,192309,192509	27770
Carnotite ()*	None	K₂(UO₂)₂(VO₄)₂·3H₂O			15	192200,192231,192232,192234,192237,192240,192242,192245,192252,192253,192254,192257,192392,192471,192596	1184
Chalcocite ()*	None	Cu₂S	1488.77	1408.77	2	192213,192295	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	1488.77	1408.77	7	192213,192291,192292,192295,192306,192308,192309	27198
Coffinite ()*	Zircon	U(SiO₄)·nH₂O	110	70	15	192202,192227,192229,192235,192236,192238,192246,192250,192387,192388,192389,192391,192474,192513,192550	566
Coquimbite ()*	Coquimbite	AlFe₃(SO₄)₆(H₂O)₁₂·6H₂O			1	192286	136
Corvusite ()*	Straczekite	(Na,Ca,K)_1-x(V⁵⁺,V⁴⁺,Fe²⁺)₈O₂₀·4H₂O			1	192391	79
Dickthomssenite ()*	None	MgV₂O₆·7H₂O			1	192234	6
Dolomite ()*	None	CaMg(CO₃)₂			1	192264	9895
Doloresite ()*	None	V⁴⁺₃O₄(OH)₄	110	70	5	192202,192387,192389,192474,192550	23
Enargite ()*	Enargite Wurtzite	Cu₃AsS₄			1	192292	910
Epsomite ()*	Epsomite	Mg(SO₄)·7H₂O			1	192598	484
Fluorite ()*	Fluorite	CaF₂	1488.77	1408.77	6	192261,192278,192295,192305,192308,192309	9617
Fourmarierite ()*	Schoepite	Pb_1-xO_3-2x(UO₂)₄(OH)_4+2x·4H₂O	106	80	1	192344	61
Galena ()*	Rocksalt	PbS	1488.77	1408.77	1	192295	24243
Gatewayite ()*	None	Ca₆(As³⁺V⁴⁺₃V⁵⁺₉As⁵⁺₆O₅₁)·31H₂O	0	0	1	192234	1
Goethite ()*	Diaspore	FeO(OH)			1	192308	7437
Gold ()*	Copper	Au			2	192198,192308	30554
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O			5	192234,192264,192390,192391,192598	6890
Halite ()*	Rocksalt	NaCl			1	192598	1398
Hematite ()*	Corundum	Fe₂O₃	1488.77	1408.77	3	192295,192308,192309	14640
Hewettite ()*	Hewettite	CaV⁵⁺₆O₁₆·9H₂O			2	192234,192391	58
Hexahydrite ()*	Hexahydrite	Mg(SO₄)·6H₂O			1	192598	251
Hummerite ()*	Pascoite	KMgV⁵⁺₅O₁₄·8H₂O			1	192234	21
Hydropascoite ()*	Pascoite	Ca₃(V₁₀O₂₈)·24H₂O			1	192234	1
Johannite ()*	Johannite	Cu(UO₂)₂(SO₄)₂(OH)₂·8H₂O	106	80	1	192344	69
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄			1	192214	5591
Kegginite ()*	Not in a structural group	Pb₃Ca₃[AsV₁₂O₄₀(VO)]·20H₂O	0	0	1	192234	1
Kieserite ()*	Kieserite	Mg(SO₄)·H₂O			1	192598	80
Lasalite ()*	Pascoite	Na₂Mg₂V₁₀O₂₈·20H₂O			1	192234	5
Löweite ()*	None	Na₁₂Mg₇(SO₄)₁₃·15H₂O			1	192598	28
Lumsdenite ()*	None	NaCa₃Mg₂(As³⁺V⁴⁺₂V⁵⁺₁₀As⁵⁺₆O₅₁)·45H₂O			1	192234	1
Luzonite ()*	Stannite Sphalerite	Cu₃AsS₄			3	192213,192291,192292	198
Magnesiopascoite ()*	Pascoite	Ca₂MgV⁵⁺₁₀O₂₈·16H₂O	0	0	1	192234	6
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			4	192213,192295,192306,192308	12537
Martyite ()*	Volborthite	Zn₃V₂O₇(OH)₂·2H₂O	0	0	1	192234	4
Mesaite ()*	Not in a structural group	CaMn²⁺₅(V₂O₇)₃·12H₂O	0	0	1	192234	1
Metahewettite ()*	Hewettite	CaV⁵⁺₆O₁₆·3H₂O	96	80	1	192389	56
Metarossite ()*	None	CaV⁵⁺₂O₆·2H₂O			1	192234	34
Metatyuyamunite ()*	Fritzscheite	Ca(UO₂)₂(VO₄)₂·3H₂O			2	192390,192391	129
Mirabilite ()*	None	Na₂(SO₄)·10H₂O			1	192598	223
Molybdenite ()*	Molybdenite	MoS₂	1488.77	1408.77	2	192295,192426	5800
Montroseite ()*	Diaspore	(V³⁺,Fe²⁺,V⁴⁺)O(OH)	96	80	2	192389,192474	136
Morrisonite ()*	Not in a structural group	Ca₁₁(As³⁺V⁴⁺₂V⁵⁺₁₀As⁵⁺₆O₅₁)₂·78H₂O	0	0	1	192234	1
Munirite ()*	None	NaV⁵⁺O₃·1.9H₂O			1	192234	5
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			1	192274	17380
Nahcolite ()*	None	NaH(CO₃)			1	192598	78
Navajoite ()*	Ajoite	(V⁵⁺,Fe³⁺)₁₀O₂₄·12H₂O			3	192234,192387,192391	11
Nitratine ()*	Calcite	Na(NO₃)			1	192286	91
Opal ()*	Amorphous	SiO₂·nH₂O			3	192221,192284,192285	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)			1	192274	2349
Packratite ()*	Not in a structural group	Ca₁₁(As³⁺V⁵⁺₁₀V⁴⁺₂As⁵⁺₆O₅₁)₂·83H₂O	0	0	1	192234	1
Paramontroseite ()*	Ramsdellite	VO₂	110	70	1	192202	39
Pascoite ()*	Pascoite	Ca₃V⁵⁺₁₀O₂₈·17H₂O	110	70	2	192202,192234	78
Pentahydrite ()*	Chalcanthite	Mg(SO₄)·5H₂O			1	192598	32
Pharmacolite ()*	Gypsum	Ca(AsO₃OH)·2H₂O			1	192234	105
Picropharmacolite ()*	None	Ca₄Mg(AsO₃OH)₂(AsO₄)₂·11H₂O			1	192234	99
Postite ()*	Pascoite	Mg(H₂O)₆Al₂(OH)₂(H₂O)₈(V₁₀O₂₈)·13H₂O	0	0	1	192234	4
Pyrite ()*	Pyrite	FeS₂	1488.77	1408.77	4	192295,192308,192309,192474	39462
Quartz ()*	Quartz	SiO₂	1488.77	1408.77	15	192220,192221,192222,192264,192265,192274,192276,192278,192285,192294,192295,192301,192305,192308,192309	61156
Rauvite ()*	None	Ca(UO₂)₂V₁₀O₂₈·16H₂O			2	192387,192391	32
Roscoelite ()*	Mica	KV³⁺₂(Si₃Al)O₁₀(OH)₂			1	192224	253
Rossite ()*	None	Ca(VO₃)₂·4H₂O			1	192234	29
Samarskite-(Y) ()*	Columbite	YFe³⁺Nb₂O₈			1	192299	353
Schoepite ()*	Schoepite	(UO₂)₄O(OH)₆(H₂O)₆	106	80	1	192344	94
Schröckingerite ()*	None	NaCa₃(UO₂)(SO₄)(CO₃)₃F·10H₂O			1	192588	128
Selenium ()*	Sulphur	Se			1	192234	143
Sherwoodite ()*	None	Ca_5.5(AlV⁴⁺V⁵⁺₁₂O₃₉)·28H₂O	96	80	2	192234,192389	20
Siderite ()*	Calcite	Fe(CO₃)			1	192263	6417
Starkeyite ()*	Starkeyite	Mg(SO₄)·4H₂O			1	192598	79
Steigerite ()*	None	Al(VO₄)·3H₂O			2	192391,192578	10
Sulphur ()*	Sulphur	S			1	192263	2045
Tenorite ()*	None	CuO			1	192308	1101
Thénardite ()*	None	Na₂(SO₄)			1	192598	299
Topaz ()*	Topaz	Al₂SiO₄F₂			1	192308	1476
Trona ()*	None	Na₃(HCO₃)(CO₃)·2H₂O			1	192598	129
Tyuyamunite ()*	None	Ca(UO₂)₂(VO₄)₂·5-8H₂O			4	192234,192474,192509,192588	628
Uraninite ()*	Fluorite	UO₂	110	70	13	192202,192227,192229,192234,192235,192236,192238,192239,192246,192250,192388,192474,192513	2718
Uranophane-α ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O			1	192588	890
Uranopilite ()*	None	(UO₂)₆(SO₄)O₂(OH)₆·14H₂O	106	80	2	192234,192344	94
Vanarsite ()*	Not in a structural group	NaCa₁₂(As³⁺V⁵⁺_8.5V⁴⁺_3.5As⁵⁺₆O₅₁)₂·78H₂O	0	0	1	192234	1
Vanoxite ()*	None	V₆O₁₃·8H₂O (?)			2	192241,192385	23
Zippeite ()*	Zippeite	K₂[(UO₂)₄(SO₄)₂O₂(OH)₂](H₂O)₄	106	80	1	192344	175
Zircon ()*	Zircon	Zr(SiO₄)			1	192285	5251

16 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Dated Mineral	Minerals explicitely stated as having this age	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
Giersdorf_00000611	70	70	70	238U-206U	Age is applied to the primary U minerals at this locality		coffinite	SS178	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U238-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000612	87	87	87	235U-207Pb	Age is applied to the primary U minerals at this locality		coffinite	SS178	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U235-Pb207 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000613	650	650	650	207Pb-206Pb	The Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methods	low	coffinite	SS178	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000614	80	80	80	238U-206U	Age is applied to the primary U minerals at this locality		coffinite	SS108	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U238-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000615	93	93	93	235U-207Pb	Age is applied to the primary U minerals at this locality		coffinite	SS108	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U235-Pb207 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000616	420	420	420	207Pb-206Pb	The Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methods	low	coffinite	SS108	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000617	90	90	90	238U-206U	Age is applied to the primary U minerals at this locality		coffinite	SS65	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U238-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000618	110	110	110	235U-207Pb	Age is applied to the primary U minerals at this locality		coffinite	SS65	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U235-Pb207 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000619	500	500	500	207Pb-206Pb	The Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methods	low	coffinite	SS65	Coffinite	Coffinite, Uraninite	5934	La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA	La Sal No. 2 Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
USGS-Rb-Sr-01297	1488.77	1408.77	1448.77±40	Rb-Sr	age of intrusion		whole rock				65675	Nancy Hanks Mine (Nancy Hanks Claim), Nancy Hanks Gulch, Unaweep Canyon, Unaweep District, Mesa Co., Colorado, USA		USGS-Rb-Sr		USGS-Rb-Sr
Giersdorf_00000608	80	80	80	238U-206U	Age is applied to the primary U minerals at this locality		coffinite	SS187	Coffinite	Coffinite	115884	Matchless Mine, Calamity Mesa, Uravan District, Mesa Co., Colorado, USA	Matchless Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U238-Pb206 Age given by the USGS for the Morrison Formation found at the Matchless Mine
Giersdorf_00000609	96	96	96	235U-207Pb	Age is applied to the primary U minerals at this locality		coffinite	SS187	Coffinite	Coffinite	115884	Matchless Mine, Calamity Mesa, Uravan District, Mesa Co., Colorado, USA	Matchless Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U235-Pb207 Age given by the USGS for the Morrison Formation found at the Matchless Mine
Giersdorf_00000610	500	500	500	207Pb-206Pb	The Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methods	low	coffinite	SS187	Coffinite	Coffinite	115884	Matchless Mine, Calamity Mesa, Uravan District, Mesa Co., Colorado, USA	Matchless Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the Matchless Mine
Giersdorf_00000620	90	90	90	238U-206U	Age is applied to the primary U minerals at this locality		coffinite	SS120	Coffinite	Coffinite	115736	Black Mama (Peaches Black Mama), Tenderfoot Mesa, Uravan District, Mesa Co., Colorado, USA	Black Mama Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U238-Pb206 Age given by the USGS for the Morrison Formation found at the Black Mama Mine
Giersdorf_00000621	106	106	106	235U-207Pb	Age is applied to the primary U minerals at this locality		coffinite	SS120	Coffinite	Coffinite	115736	Black Mama (Peaches Black Mama), Tenderfoot Mesa, Uravan District, Mesa Co., Colorado, USA	Black Mama Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U235-Pb207 Age given by the USGS for the Morrison Formation found at the Black Mama Mine
Giersdorf_00000622	450	450	450	207Pb-206Pb	The Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methods	low	coffinite	SS120	Coffinite	Coffinite	115736	Black Mama (Peaches Black Mama), Tenderfoot Mesa, Uravan District, Mesa Co., Colorado, USA	Black Mama Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the Black Mama Mine

Sample	Source Locality	Reference URL
R060478	Grand Junction, Mesa Co., Colorado, USA	https://rruff.info/R060478

All locality data graciously provided by mindat.org

All age data...