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:
Union, Knox Co., Maine, USA


mindat Locality ID: 20935
mindat URL: http://www.mindat.org/loc-20935.html

Tectonic Settings:

Total number of sublocalities beneath "Union, Knox Co., Maine, USA": 4
Total number of bottom-level sublocalities: 4

Number of Child Localities: 4
Child Localities:
Appleton Ridge
Harriman Prospect
Union Andalusite Locality
Union Limestone Quarries (Knox Lime Company Quarries)

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0
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 C Ca Co Cr Cu F Fe H K Mg Mo Na Ni O P Pb Pt S Si Sn Ti Zn Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleAndalusiteApatiteCalciteChalcopyriteChloriteClayCorundumCubaniteFeldspar
GarnetKaoliniteLöllingiteMalachiteMicaMolybdeniteNickelineNoneOlivinePentlandite
PyritePyroxeneQuartzRocksaltRutileSerpentineSphaleriteSpinelStauroliteTitanite
TourmalineValleriiteWurtziteZircon

54 IMA Minerals at location:
Actinolite  (*)Almandine  (*)Andalusite  (*)Annite  (*)Anorthite  (*)
Augite  (*)Bornite  (*)Calcite  (*)Chalcocite  (*)Chalcopyrite  (*)
Chrysotile  (*)Clinochlore  (*)Cubanite  (*)Diopside  (*)Dolomite  (*)
Dravite  (*)Enstatite  (*)Fluorapatite  (*)Forsterite  (*)Galena  (*)
Graphite  (*)Grossular  (*)Hematite  (*)Hercynite  (*)Ilmenite  (*)
Kaolinite  (*)Linnaeite  (*)Mackinawite  (*)Magnetite  (*)Malachite  (*)
Microcline  (*)Molybdenite  (*)Muscovite  (*)Nickeline  (*)Niggliite  (*)
Gersdorffite-Pa3  (*)Pentlandite  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)
Rammelsbergite  (*)Rutile  (*)Schorl  (*)Sperrylite  (*)Sphalerite  (*)
Spinel  (*)Staurolite  (*)Titanite  (*)Tremolite  (*)Ulvöspinel  (*)
Uvarovite  (*)Vaesite  (*)Valleriite  (*)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)212171673419
Almandine  (*)GarnetFe2+3Al2(SiO4)312171672353
Andalusite  (*)AndalusiteAl2SiO52217166,2171671310
Annite  (*)Mica ClayKFe2+3(AlSi3O10)(OH)21217164356
Anorthite  (*)FeldsparCa(Al2Si2O8)12171651036
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O612171652060
Bornite  (*)NoneCu5FeS412171655516
Calcite  (*)CalciteCa(CO3)2217165,21716727770
Chalcocite  (*)NoneCu2S12171675707
Chalcopyrite  (*)ChalcopyriteCuFeS22217165,21716727198
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)41217165951
Clinochlore  (*)Chlorite ClayMg5Al(AlSi3O10)(OH)812171651756
Cubanite  (*)Cubanite WurtziteCuFe2S31217165802
Diopside  (*)PyroxeneCaMgSi2O612171674135
Dolomite  (*)NoneCaMg(CO3)212171659895
Dravite  (*)TourmalineNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)1217167648
Enstatite  (*)PyroxeneMg2Si2O61217165944
Fluorapatite  (*)ApatiteCa5(PO4)3F12171672740
Forsterite  (*)OlivineMg2(SiO4)12171651188
Galena  (*)RocksaltPbS2217165,21716724243
Graphite  (*)NoneC2217165,2171672812
Grossular  (*)GarnetCa3Al2(SiO4)312171671544
Hematite  (*)CorundumFe2O3121716514640
Hercynite  (*)SpinelFe2+Al2O41217165407
Ilmenite  (*)CorundumFe2+Ti4+O312171655433
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)412171675591
Linnaeite  (*)SpinelCo2+Co3+2S41217167249
Mackinawite  (*)None(Fe,Ni)1+xS (x = 0-0.07)1217165451
Magnetite  (*)SpinelFe2+Fe3+2O42217165,21716714899
Malachite  (*)MalachiteCu2(CO3)(OH)2121716712537
Microcline  (*)FeldsparK(AlSi3O8)12171674924
Molybdenite  (*)MolybdeniteMoS212171655800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2121716717380
Nickeline  (*)NickelineNiAs1217165633
Niggliite  (*)NickelinePtSn121716522
Gersdorffite-Pa3  (*)PyriteNiAsS1217165767
Pentlandite  (*)Pentlandite(Ni,Fe)9S812171651512
Pyrite  (*)PyriteFeS22217165,21716739462
Pyrrhotite  (*)NickelineFe7S82217165,2171679056
Quartz  (*)QuartzSiO22217164,21716761156
Rammelsbergite  (*)LöllingiteNiAs21217165233
Rutile  (*)RutileTiO212171655614
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)12171672705
Sperrylite  (*)PyritePtAs21217165337
Sphalerite  (*)SphaleriteZnS121716521482
Spinel  (*)SpinelMgAl2O412171651934
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)1217164978
Titanite  (*)TitaniteCaTi(SiO4)O2217165,2171674899
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)212171672562
Ulvöspinel  (*)SpinelFe2+2TiO41217165120
Uvarovite  (*)GarnetCa3Cr2(SiO4)31217165212
Vaesite  (*)PyriteNiS21217165106
Valleriite  (*)Valleriite2[(Fe,Cu)S]·1.53[(Mg,Al)(OH)2]1217165237
Zircon  (*)ZirconZr(SiO4)12171655251


No ages have been assigned to this locality yet.
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All locality data graciously provided by mindat.org

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