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:
Fairfield, Fairfield Co., Connecticut, USA

Oldest recorded age at locality: 434.43
Youngest recorded age at locality: 404.08

mindat Locality ID: 65992
mindat URL: http://www.mindat.org/loc-65992.html

Tectonic Settings:

Total number of sublocalities beneath "Fairfield, Fairfield Co., Connecticut, USA": 7
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Congress Street Construction Site
Exit 24 Interstate Highway 95
Metro North Train Station
Southport
The Brickwalk
The Cascades

Latitude: 41°9'56"N
Longitude: 73°15'3"W
Decimal Degree (lat, lon): 41.165555555556,-73.250833333333

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 Ca Fe H K Na O S Si Ti 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ClayClinozoisiteCorundumEpidoteFeldsparGarnetMarcasiteMicaNoneNot in a structural group
PyriteQuartzStauroliteTourmaline

14 IMA Minerals at location:
Albite  (*)Almandine  (*)Anatase  (*)Epidote  (*)Hematite  (*)
Laumontite  (*)Marcasite  (*)Microcline  (*)Muscovite  (*)Pyrite  (*)
Quartz  (*)Schorl  (*)Sillimanite  (*)Staurolite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)11987318803
Almandine  (*)GarnetFe2+3Al2(SiO4)32198725,1987312353
Anatase  (*)Not in a structural groupTiO211987302162
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)434.43404.0811987268173
Hematite  (*)CorundumFe2O3119873114640
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O434.43404.0811987261271
Marcasite  (*)MarcasiteFeS211987275674
Microcline  (*)FeldsparK(AlSi3O8)11987314924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)23198725,198727,19873117380
Pyrite  (*)PyriteFeS2119872739462
Quartz  (*)QuartzSiO2434.43404.085198725,198726,198727,198730,19873161156
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)11987312705
Sillimanite  (*)Not in a structural groupAl2SiO52198725,1987291516
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)1198731978



2 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
USGS-Rb-Sr-01153434.43414.43424.43±10Rb-Srminimum age of metamorphic crystallizationwhole rock     251457Exit 24 Interstate Highway 95, Fairfield, Fairfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-01154424.08404.08414.08±10Rb-Srminimum age of metamorphic crystallizationwhole rock     251457Exit 24 Interstate Highway 95, Fairfield, Fairfield Co., Connecticut, USA USGS-Rb-Sr USGS-Rb-Sr 


SampleSource LocalityReference URL


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