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:
Bombazine Island, Harpswell, Cumberland Co., Maine, USA

Oldest recorded age at locality: 265
Youngest recorded age at locality: 263

mindat Locality ID: 126194
mindat URL: http://www.mindat.org/loc-126194.html

Tectonic Settings:

Total number of sublocalities beneath "Bombazine Island, Harpswell, Cumberland Co., Maine, USA": 0
Total number of bottom-level sublocalities: 0

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 C Ca Fe H K Mg Na O Si Ti 

Elements from minerals reported directly at this locality: Al C Ca Fe H K Mg Na O Si Ti 

Structural Groups for minerals in this locality: 
AmphiboleBerylChloriteClayFeldsparGarnetMicaNoneNot in a structural groupQuartz
ScapoliteSpinelStauroliteTitanite

18 IMA Minerals at location:
Albite  (*)Almandine  (*)Annite  (*)Clinochlore  (*)Cordierite  (*)
Cummingtonite  (*)Gedrite  (*)Grossular  (*)Magnesio-hornblende  (*)Margarite  (*)
Meionite  (*)Muscovite  (*)Phlogopite  (*)Quartz  (*)Sillimanite  (*)
Spinel  (*)Staurolite  (*)Titanite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)26526308803
Almandine  (*)GarnetFe2+3Al2(SiO4)326526302353
Annite  (*)Mica ClayKFe2+3(AlSi3O10)(OH)22652630356
Clinochlore  (*)Chlorite ClayMg5Al(AlSi3O10)(OH)826526301756
Cordierite  (*)BerylMg2Al4Si5O1826526301008
Cummingtonite  (*)Amphibole   Mg2Mg5Si8O22(OH)22652630327
Gedrite  (*)Amphibole   Mg2(Mg3Al2)(Si6Al2)O22(OH)22652630178
Grossular  (*)GarnetCa3Al2(SiO4)326526301544
Magnesio-hornblende  (*)Amphibole   Ca2(Mg4Al)(Si7Al)O22(OH)22652630238
Margarite  (*)Mica ClayCaAl2Si2Al2O10(OH)22652630168
Meionite  (*)ScapoliteCa4Al6Si6O24(CO3)2652630176
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2265263017380
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)226526302273
Quartz  (*)QuartzSiO2265263061156
Sillimanite  (*)Not in a structural groupAl2SiO526526301516
Spinel  (*)SpinelMgAl2O426526301934
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)2652630978
Titanite  (*)TitaniteCaTi(SiO4)O26526304899


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
Bradley_2012_092265263264±1U/Pb zircon  YesZircon  237377Sebago, Cumberland Co., Maine, USAMt. Mica (Irish Pit)McCauley and Bradley (2014)10.3749/canmin.52.2.183CM52_183 

SampleSource LocalityReference URL

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