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:
Casco, Cumberland Co., Maine, USA

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

mindat Locality ID: 191999
mindat URL: http://www.mindat.org/loc-191999.html

Tectonic Settings:

Total number of sublocalities beneath "Casco, Cumberland Co., Maine, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Chute Prospect
Heath Quarry

Latitude: 44°0'2"N
Longitude: 70°28'27"W
Decimal Degree (lat, lon): 44.000555555556,-70.474166666667
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 C Ca Cu F Fe H K Mg Na O S Si Ti Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousAmphiboleBerylCalciteChalcopyriteChloriteClayClinozoisiteEpidoteFeldspar
FluoriteGarnetMicaNoneNot in a structural groupPyritePyroxeneQuartzRutileScapolite
SphaleriteTitaniteTourmalineVesuvianite

26 IMA Minerals at location:
Actinolite  (*)Albite  (*)Almandine  (*)Anatase  (*)Ankerite  (*)
Beryl  (*)Calcite  (*)Chalcopyrite  (*)Chamosite  (*)Clinozoisite  (*)
Diopside  (*)Dolomite  (*)Epidote  (*)Fluorite  (*)Grossular  (*)
Meionite  (*)Microcline  (*)Muscovite  (*)Opal  (*)Pyrite  (*)
Quartz  (*)Rutile  (*)Schorl  (*)Sphalerite  (*)Titanite  (*)
Vesuvianite  (*)
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)226526312168233419
Albite  (*)FeldsparNa(AlSi3O8)2652632216823,2168248803
Almandine  (*)GarnetFe2+3Al2(SiO4)326526312168242353
Anatase  (*)Not in a structural groupTiO226526312168242162
Ankerite  (*)NoneCa(Fe2+,Mg)(CO3)226526312168243092
Beryl  (*)BerylBe3Al2Si6O1826526312168244286
Calcite  (*)CalciteCa(CO3)2652632216823,21682427770
Chalcopyrite  (*)ChalcopyriteCuFeS2265263121682427198
Chamosite  (*)Chlorite Clay(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)82652631216824577
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)2652632216823,2168241025
Diopside  (*)PyroxeneCaMgSi2O62652632216823,2168244135
Dolomite  (*)NoneCaMg(CO3)226526312168249895
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)26526312168248173
Fluorite  (*)FluoriteCaF226526312168239617
Grossular  (*)GarnetCa3Al2(SiO4)32652632216823,2168241544
Meionite  (*)ScapoliteCa4Al6Si6O24(CO3)2652631216823176
Microcline  (*)FeldsparK(AlSi3O8)26526312168244924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2265263121682417380
Opal  (*)AmorphousSiO2·nH2O26526312168242994
Pyrite  (*)PyriteFeS22652632216823,21682439462
Quartz  (*)QuartzSiO22652632216823,21682461156
Rutile  (*)RutileTiO226526312168245614
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)26526312168242705
Sphalerite  (*)SphaleriteZnS265263121682421482
Titanite  (*)TitaniteCaTi(SiO4)O2652632216823,2168244899
Vesuvianite  (*)Vesuvianite(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)102652632216823,2168241395


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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