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:
Worcester Co., Massachusetts, USA

Oldest recorded age at locality: 379
Youngest recorded age at locality: 227

mindat Locality ID: 15193
mindat URL: http://www.mindat.org/loc-15193.html

Tectonic Settings:

Total number of sublocalities beneath "Worcester Co., Massachusetts, USA": 138
Total number of bottom-level sublocalities: 101

Number of Child Localities: 44
Child Localities:
Athol
Barre
Berlin
Blackstone
Bolton
Boylston
Charlton
Clinton
Douglas
Fitchburg
Gardner
Hardwick
Harvard
Holden
Hopedale
Hubbardston
Lancaster
Leominster
Lunenburg
Mendon
Milford
Millbury
Millville
New Braintree
Northborough
Northbridge
Oxford
Paxton
Petersham
Phillipston
Royalston
Rutland
Shrewsbury
Southborough
Sterling
Sturbridge
Sutton
Templeton
Uxbridge
Warren
West Brookfield
Westminster
Winchendon
Worcester

Latitude: 42°21'4"N
Longitude: 71°52'12"W
Decimal Degree (lat, lon): 42.351111111111,-71.87

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	Analcime	Andalusite	Apatite	Arsenopyrite	Autunite	Baryte	Beryl
Calcite	Chalcopyrite	Chevkinite	Chlorite	Chloritoid	Clay	Clinozoisite	Corundum	Diaspore	Epidote
Feldspar	Fluorite	Garnet	Gypsum	Halotrichite	Humite	Kaolinite	Malachite	Marcasite	Melanterite
Meta-autunite	Mica	Molybdenite	Nickeline	None	Not in a structural group	Olivine	Prehnite	Pyrite	Pyroxene
Quartz	Rhodonite	Rockbridgeite	Rocksalt	Rutile	Scapolite	Scheelite	Serpentine	Smectite-vermiculite	Sphalerite
Spinel	Staurolite	Stilbite	Talc	Thomsonite	Titanite	Topaz	Tourmaline	Vesuvianite	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 B Be C Ca Ce Cl Cr Cs Cu F Fe H K Li Mg Mn Mo Na O P Pb S Si Sn Ti U W Zn Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allanite Amorphous Amphibole Analcime Andalusite Apatite Arsenopyrite Autunite Baryte Beryl
Calcite Chalcopyrite Chevkinite Chlorite Chloritoid Clay Clinozoisite Corundum Diaspore Epidote
Feldspar Fluorite Garnet Gypsum Halotrichite Humite Kaolinite Malachite Marcasite Melanterite
Meta-autunite Mica Molybdenite Nickeline None Not in a structural group Olivine Prehnite Pyrite Pyroxene
Quartz Rhodonite Rockbridgeite Rocksalt Rutile Scapolite Scheelite Serpentine Smectite-vermiculite Sphalerite
Spinel Staurolite Stilbite Talc Thomsonite Titanite Topaz Tourmaline Vesuvianite Zircon

93 IMA Minerals at location:

Actinolite ()*	Albite ()*	Allanite-(Ce) ()*	Almandine ()*	Anatase ()*
Andalusite ()*	Anglesite ()*	Ankerite ()*	Antigorite ()*	Arsenopyrite ()*
Augite ()*	Autunite ()*	Azurite ()*	Babingtonite ()*	Bertrandite ()*
Beryl ()*	Calcite ()*	Cassiterite ()*	Chalcopyrite ()*	Chamosite ()*
Chevkinite-(Ce) ()*	Chondrodite ()*	Chromite ()*	Clinochlore ()*	Clinohumite ()*
Clinozoisite ()*	Cordierite ()*	Diopside ()*	Dolomite ()*	Enstatite ()*
Epidote ()*	Fluorapatite ()*	Fluorite ()*	Forsterite ()*	Galena ()*
Goethite ()*	Graphite ()*	Grossular ()*	Gypsum ()*	Hematite ()*
Ilmenite ()*	Kaolinite ()*	Kyanite ()*	Laumontite ()*	Lechatelierite ()*
Magnesio-hornblende ()*	Magnesite ()*	Magnetite ()*	Malachite ()*	Marcasite ()*
Margarite ()*	Marialite ()*	Meionite ()*	Melanterite ()*	Meta-autunite ()*
Microcline ()*	Molybdenite ()*	Montebrasite ()*	Muscovite ()*	Opal ()*
Orthoclase ()*	Ottrélite ()*	Pargasite ()*	Petalite ()*	Phlogopite ()*
Pickeringite ()*	Pollucite ()*	Prehnite ()*	Pyrite ()*	Pyrrhotite ()*
Quartz ()*	Rockbridgeite ()*	Rutile ()*	Scheelite ()*	Schorl ()*
Siderite ()*	Sillimanite ()*	Sphalerite ()*	Spinel ()*	Spodumene ()*
Staurolite ()*	Stellerite ()*	Talc ()*	Thomsonite-Ca ()*	Titanite ()*
Topaz ()*	Tremolite ()*	Triphylite ()*	Uraninite ()*	Vermiculite ()*
Vesuvianite ()*	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
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂			7	219816,219853,219858,219878,219888,219909,219934	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)			15	219804,219816,219817,219828,219835,219843,219856,219863,219894,219895,219907,219913,219918,219924,219925	8803
Allanite-(Ce) ()*	Allanite Epidote	CaCe(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)			1	219828	706
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃			9	219825,219828,219843,219856,219863,219893,219894,219897,219938	2353
Anatase ()*	Not in a structural group	TiO₂			1	219910	2162
Andalusite ()*	Andalusite	Al₂SiO₅			9	219815,219825,219837,219847,219848,219849,219850,219907,219908	1310
Anglesite ()*	Baryte	Pb(SO₄)			1	219835	2734
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	379	342.14	2	219806,219935	3092
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			2	219816,219903	708
Arsenopyrite ()*	Arsenopyrite	FeAsS			11	219816,219828,219856,219858,219860,219884,219907,219912,219926,219933,219939	9052
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆			2	219816,219879	2060
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O			2	219852,219856	1272
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			1	219934	5509
Babingtonite ()*	Rhodonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)			5	219803,219804,219835,219923,219924	161
Bertrandite ()*	Not in a structural group	Be₄Si₂O₇(OH)₂			2	219843,219918	606
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	379	342.14	14	219803,219805,219808,219815,219826,219827,219828,219857,219893,219894,219895,219917,219918,219935	4286
Calcite ()*	Calcite	Ca(CO₃)	379	342.14	17	219809,219816,219828,219835,219843,219858,219859,219860,219863,219878,219888,219898,219910,219915,219934,219935,219940	27770
Cassiterite ()*	Rutile	SnO₂			2	219856,219907	5171
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			8	219816,219828,219858,219859,219860,219907,219926,219934	27198
Chamosite ()*	Chlorite Clay	(Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈			1	219828	577
Chevkinite-(Ce) ()*	Chevkinite	Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂			1	219863	89
Chondrodite ()*	Humite	Mg₅(SiO₄)₂F₂			1	219816	285
Chromite ()*	Spinel	Fe²⁺Cr₂O₄			1	219879	3902
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈			2	219910,219934	1756
Clinohumite ()*	Humite	Mg₉(SiO₄)₄F₂			1	219816	236
Clinozoisite ()*	Clinozoisite Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)			2	219888,219940	1025
Cordierite ()*	Beryl	Mg₂Al₄Si₅O₁₈			4	219892,219913,219914,219927	1008
Diopside ()*	Pyroxene	CaMgSi₂O₆			6	219816,219858,219859,219860,219888,219940	4135
Dolomite ()*	None	CaMg(CO₃)₂			2	219816,219859	9895
Enstatite ()*	Pyroxene	Mg₂Si₂O₆			2	219879,219913	944
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			14	219803,219804,219816,219828,219835,219843,219863,219900,219901,219910,219923,219924,219925,219934	8173
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	253	227	9	219815,219816,219828,219843,219855,219858,219860,219879,219918	2740
Fluorite ()*	Fluorite	CaF₂	379	342.14	8	219804,219828,219835,219843,219863,219918,219925,219935	9617
Forsterite ()*	Olivine	Mg₂(SiO₄)			2	219816,219903	1188
Galena ()*	Rocksalt	PbS			8	219835,219887,219907,219912,219923,219926,219933,219939	24243
Goethite ()*	Diaspore	FeO(OH)			3	219806,219835,219932	7437
Graphite ()*	None	C			9	219809,219812,219816,219874,219888,219913,219915,219919,219938	2812
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃	379	342.14	3	219888,219935,219940	1544
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O			1	219835	6890
Hematite ()*	Corundum	Fe₂O₃			6	219861,219862,219863,219900,219901,219918	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	253	227	12	219805,219809,219811,219828,219832,219835,219843,219853,219855,219863,219900,219909	5433
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄			1	219863	5591
Kyanite ()*	Not in a structural group	Al₂OSiO₄			4	219847,219852,219853,219859	1507
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O			1	219835	1271
Lechatelierite ()*	Amorphous	SiO₂			1	219886	62
Magnesio-hornblende ()*	Amphibole	Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂			2	219816,219881	238
Magnesite ()*	Calcite	Mg(CO₃)			1	219816	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			12	219816,219835,219843,219863,219879,219894,219895,219910,219913,219915,219918,219925	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			2	219859,219934	12537
Marcasite ()*	Marcasite	FeS₂			2	219828,219922	5674
Margarite ()*	Mica Clay	CaAl₂Si₂Al₂O₁₀(OH)₂			1	219847	168
Marialite ()*	Scapolite	Na₄Al₃Si₉O₂₄Cl			1	219881	139
Meionite ()*	Scapolite	Ca₄Al₆Si₆O₂₄(CO₃)			1	219816	176
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O			2	219846,219922	915
Meta-autunite ()*	Meta-autunite	Ca(UO₂)₂(PO₄)₂·6H₂O	253	227	1	219852	388
Microcline ()*	Feldspar	K(AlSi₃O₈)			20	219803,219809,219816,219817,219827,219828,219835,219843,219856,219863,219867,219879,219893,219895,219901,219907,219913,219918,219923,219924	4924
Molybdenite ()*	Molybdenite	MoS₂	379	342.14	4	219816,219826,219828,219935	5800
Montebrasite ()*	None	LiAl(PO₄)(OH)			1	219856	200
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	253	227	27	219803,219816,219817,219821,219827,219828,219830,219837,219843,219847,219848,219850,219853,219855,219856,219858,219859,219860,219863,219867,219888,219894,219895,219909,219911,219918,219925	17380
Opal ()*	Amorphous	SiO₂·nH₂O			7	219816,219828,219830,219835,219853,219858,219860	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)			5	219832,219835,219863,219892,219914	2349
Ottrélite ()*	Chloritoid	Mn²⁺Al₂O(SiO₄)(OH)₂			1	219909	59
Pargasite ()*	Amphibole	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂			1	219816	313
Petalite ()*	Not in a structural group	LiAlSi₄O₁₀			1	219816	124
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂			1	219816	2273
Pickeringite ()*	Halotrichite	MgAl₂(SO₄)₄·22H₂O			1	219843	265
Pollucite ()*	Analcime	Cs(Si₂Al)O₆·nH₂O			1	219856	140
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂			5	219803,219804,219835,219924,219934	1898
Pyrite ()*	Pyrite	FeS₂	379	227	31	219803,219804,219806,219811,219816,219828,219835,219843,219846,219855,219856,219858,219859,219860,219863,219887,219888,219902,219907,219909,219910,219912,219913,219915,219922,219923,219924,219934,219935,219937,219939	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			9	219816,219828,219859,219860,219879,219888,219922,219932,219934	9056
Quartz ()*	Quartz	SiO₂	379	227	49	219806,219816,219817,219827,219828,219830,219832,219835,219843,219847,219848,219850,219853,219855,219856,219857,219858,219859,219860,219861,219862,219863,219867,219880,219881,219887,219888,219894,219895,219897,219898,219905,219906,219907,219909,219910,219911,219912,219913,219915,219917,219918,219923,219924,219925,219926,219932,219934,219935	61156
Rockbridgeite ()*	Rockbridgeite	(Fe²⁺_0.5Fe³⁺_0.5)₂Fe³⁺₃(PO₄)₃(OH)₅	253	227	1	219852	206
Rutile ()*	Rutile	TiO₂			6	219807,219816,219828,219835,219910,219918	5614
Scheelite ()*	Scheelite	Ca(WO₄)			1	219881	4894
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	253	227	10	219815,219827,219828,219855,219856,219879,219888,219894,219897,219937	2705
Siderite ()*	Calcite	Fe(CO₃)			6	219843,219897,219898,219912,219933,219939	6417
Sillimanite ()*	Not in a structural group	Al₂SiO₅	379	342.14	10	219803,219816,219825,219879,219888,219892,219913,219915,219919,219933	1516
Sphalerite ()*	Sphalerite	ZnS	379	342.14	7	219835,219859,219887,219907,219912,219926,219935	21482
Spinel ()*	Spinel	MgAl₂O₄			1	219816	1934
Spodumene ()*	Pyroxene	LiAlSi₂O₆			5	219827,219841,219856,219907,219911	688
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)	379	342.14	7	219819,219825,219826,219847,219856,219907,219933	978
Stellerite ()*	Stilbite	Ca₄(Si₂₈Al₈)O₇₂·28H₂O			1	219809	189
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			7	219803,219816,219829,219876,219877,219890,219903	3337
Thomsonite-Ca ()*	Thomsonite	NaCa₂(Al₅Si₅)O₂₀·6H₂O			1	219835	452
Titanite ()*	Titanite	CaTi(SiO₄)O	379	227	14	219816,219828,219830,219835,219853,219855,219858,219859,219860,219863,219881,219888,219910,219935	4899
Topaz ()*	Topaz	Al₂SiO₄F₂			2	219856,219907	1476
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂			2	219816,219903	2562
Triphylite ()*	Olivine	LiFe²⁺(PO₄)	253	227	1	219852	313
Uraninite ()*	Fluorite	UO₂			1	219828	2718
Vermiculite ()*	Clay Smectite-vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O			3	219816,219874,219934	652
Vesuvianite ()*	Vesuvianite	(Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀			1	219940	1395
Zircon ()*	Zircon	Zr(SiO₄)	253	227	7	219816,219828,219835,219855,219863,219913,219934	5251
Zoisite ()*	Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)			1	219863	1025

6 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Alexandra-0415	253	227	241 ± 13	K-Ar	Age of diorite	biotite	60895	Leavitt Quarry, Leominster, Worcester Co., Massachusetts, USA	Leavitt quarry	Zartman et al. (1970)	10.1130/0016-7606(1970)81[3359:APDOKR]2.0.CO;2	GSAB81_3359
USGS-Rb-Sr-00877	372.14	342.14	357.14±15	Rb-Sr	age of intrusion	whole rock	15191	Millstone Hill Quarry, Worcester, Worcester Co., Massachusetts, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-06279	379	365	372±7	Rb-Sr	age of intrusion	whole rock	15191	Millstone Hill Quarry, Worcester, Worcester Co., Massachusetts, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-06280	379	365	372±7	Rb-Sr	age of intrusion	whole rock	15191	Millstone Hill Quarry, Worcester, Worcester Co., Massachusetts, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-06281	379	365	372±7	Rb-Sr	age of intrusion	whole rock	15191	Millstone Hill Quarry, Worcester, Worcester Co., Massachusetts, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-06282	379	365	372±7	Rb-Sr	age of intrusion	whole rock	15191	Millstone Hill Quarry, Worcester, Worcester Co., Massachusetts, USA		USGS-Rb-Sr		USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...