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:
Mount Agamenticus Alkaline Syenite, York, York Co., Maine, USA

Oldest recorded age at locality: 228
Youngest recorded age at locality: 228

mindat Locality ID: 192749
mindat URL: http://www.mindat.org/loc-192749.html

Tectonic Settings:

Total number of sublocalities beneath "Mount Agamenticus Alkaline Syenite, York, York 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 Ca Fe H Mg Na O Si 

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

Structural Groups for minerals in this locality: 
AmphiboleFeldsparNoneOlivinePyroxeneSpinel

8 IMA Minerals at location:
Aegirine  (*)Aegirine-augite  (*)Anorthite  (*)Arfvedsonite  (*)Fayalite  (*)
Ferro-hornblende  (*)Hercynite  (*)Riebeckite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Aegirine  (*)PyroxeneNaFe3+Si2O622822801022
Aegirine-augite  (*)Pyroxene(Ca,Na)(Fe3+,Mg,Fe2+)Si2O62282280286
Anorthite  (*)FeldsparCa(Al2Si2O8)22822801036
Arfvedsonite  (*)AmphiboleNaNa2(Fe2+4Fe3+)Si8O22(OH)22282280295
Fayalite  (*)OlivineFe2+2(SiO4)2282280371
Ferro-hornblende  (*)Amphibole   Ca2(Fe2+4Al)(Si7Al)O22(OH)22282280271
Hercynite  (*)SpinelFe2+Al2O42282280407
Riebeckite  (*)Amphibole   Na2(Fe2+3Fe3+2)Si8O22(OH)22282280375


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
AREPS5_257-00004228228228        192749Mount Agamenticus Alkaline Syenite, York, York Co., Maine, USAAgamenticusZartman (1977)10.1146/annurev.ea.05.050177.001353AREPS5_257 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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