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:
Freeport, Cumberland Co., Maine, USA

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

mindat Locality ID: 23904
mindat URL: http://www.mindat.org/loc-23904.html

Tectonic Settings:

Total number of sublocalities beneath "Freeport, Cumberland Co., Maine, USA": 8
Total number of bottom-level sublocalities: 8

Number of Child Localities: 8
Child Localities:
Charles Taylor Quarry
E.B. Mallett Granite Quarry
Freeport Granite Quarry
Interstate 95 Locality
Porter Landing Prospects
Pound Of Tea Island Epidote Locality
Unnamed Granite Quarry
Wolfe's Neck Locality

Latitude: 43°48'31"N
Longitude: 70°6'15"W
Decimal Degree (lat, lon): 43.808611111111,-70.104166666667
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 B Be Ca F Fe H K Na O P S Si U 

Elements from minerals reported directly at this locality: H O Si 

Structural Groups for minerals in this locality: 
AmorphousApatiteAutuniteBerylClayClinozoisiteEpidoteFeldsparGarnetMeta-autunite
MicaNonePyriteQuartzTourmaline

12 IMA Minerals at location:
Almandine  (*)Autunite  (*)Beryl  (*)Epidote  (*)Fluorapatite  (*)
Meta-autunite  (*)Microcline  (*)Muscovite  (*)Opal  (*)Pyrite  (*)
Quartz  (*)Schorl  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Almandine  (*)GarnetFe2+3Al2(SiO4)326526312168312353
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O26526312168341272
Beryl  (*)BerylBe3Al2Si6O1826526312168314286
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)26526312168368173
Fluorapatite  (*)ApatiteCa5(PO4)3F26526312168332740
Meta-autunite  (*)Meta-autuniteCa(UO2)2(PO4)2·6H2O2652631216834388
Microcline  (*)FeldsparK(AlSi3O8)2652637216831,216832,216833,216834,216835,216837,2168384924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22652638216831,216832,216833,216834,216835,216836,216837,21683817380
Opal  (*)AmorphousSiO2·nH2O26526302994
Pyrite  (*)PyriteFeS22652632216833,21683839462
Quartz  (*)QuartzSiO22652638216831,216832,216833,216834,216835,216836,216837,21683861156
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)26526312168312705


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

All locality data graciously provided by mindat.org

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