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:
Leominster, Worcester Co., Massachusetts, USA

Oldest recorded age at locality: 253
Youngest recorded age at locality: 227

mindat Locality ID: 69591
mindat URL: http://www.mindat.org/loc-69591.html

Tectonic Settings:

Total number of sublocalities beneath "Leominster, Worcester Co., Massachusetts, USA": 5
Total number of bottom-level sublocalities: 5

Number of Child Localities: 5
Child Localities:
Jungle Road Area
Kittridge Quarry
Leavitt Quarry
Long Hill
Monoosnoc Hill

Latitude: 42°30'46"N
Longitude: 71°46'5"W
Decimal Degree (lat, lon): 42.512777777778,-71.768055555556
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 B Be Ca Cs F Fe H K Li Mg Na O P S Si Sn Ti U Zr 

Elements from minerals reported directly at this locality: Ca Fe H Li O P U 

Structural Groups for minerals in this locality: 
AmorphousAmphiboleAnalcimeApatiteArsenopyriteAutuniteBerylClayCorundumFeldspar
GarnetMeta-autuniteMicaNoneNot in a structural groupOlivinePyritePyroxeneQuartzRockbridgeite
RutileStauroliteTitaniteTopazTourmalineZircon

26 IMA Minerals at location:
Actinolite  (*)Albite  (*)Almandine  (*)Arsenopyrite  (*)Autunite  (*)
Beryl  (*)Cassiterite  (*)Fluorapatite  (*)Ilmenite  (*)Kyanite  (*)
Meta-autunite  (*)Microcline  (*)Montebrasite  (*)Muscovite  (*)Opal  (*)
Pollucite  (*)Pyrite  (*)Quartz  (*)Rockbridgeite  (*)Schorl  (*)
Spodumene  (*)Staurolite  (*)Titanite  (*)Topaz  (*)Triphylite  (*)
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)212198533419
Albite  (*)FeldsparNa(AlSi3O8)12198568803
Almandine  (*)GarnetFe2+3Al2(SiO4)312198562353
Arsenopyrite  (*)ArsenopyriteFeAsS12198569052
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O12198561272
Beryl  (*)BerylBe3Al2Si6O1812198574286
Cassiterite  (*)RutileSnO212198565171
Fluorapatite  (*)ApatiteCa5(PO4)3F25322712198552740
Ilmenite  (*)CorundumFe2+Ti4+O32532272219853,2198555433
Kyanite  (*)Not in a structural groupAl2OSiO412198531507
Meta-autunite  (*)Meta-autuniteCa(UO2)2(PO4)2·6H2O2532270388
Microcline  (*)FeldsparK(AlSi3O8)12198564924
Montebrasite  (*)NoneLiAl(PO4)(OH)1219856200
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22532273219853,219855,21985617380
Opal  (*)AmorphousSiO2·nH2O12198532994
Pollucite  (*)AnalcimeCs(Si2Al)O6·nH2O1219856140
Pyrite  (*)PyriteFeS22532272219855,21985639462
Quartz  (*)QuartzSiO22532274219853,219855,219856,21985761156
Rockbridgeite  (*)Rockbridgeite(Fe2+0.5Fe3+0.5)2Fe3+3(PO4)3(OH)52532270206
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)2532272219855,2198562705
Spodumene  (*)PyroxeneLiAlSi2O61219856688
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)1219856978
Titanite  (*)TitaniteCaTi(SiO4)O2532272219853,2198554899
Topaz  (*)TopazAl2SiO4F212198561476
Triphylite  (*)OlivineLiFe2+(PO4)2532270313
Zircon  (*)ZirconZr(SiO4)25322712198555251


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
Alexandra-0415253227241 ± 13K-ArAge of dioritebiotite     60895Leavitt Quarry, Leominster, Worcester Co., Massachusetts, USALeavitt quarryZartman et al. (1970)10.1130/0016-7606(1970)81[3359:APDOKR]2.0.CO;2GSAB81_3359 

SampleSource LocalityReference URL

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