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:
Elwyn, Middletown Township, Delaware Co., Pennsylvania, USA


mindat Locality ID: 204077
mindat URL: http://www.mindat.org/loc-204077.html

Tectonic Settings:

Total number of sublocalities beneath "Elwyn, Middletown Township, Delaware Co., Pennsylvania, USA": 3
Total number of bottom-level sublocalities: 2

Number of Child Localities: 1
Child Localities:
Mineral Hill

Latitude: 39°55'7"N
Longitude: 75°24'42"W
Decimal Degree (lat, lon): 39.918611111111,-75.411666666667
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 Be C Ca Cr Fe H K Mg Mn Na Nb O Si Y 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleBerylCalciteClayColumbiteCorundumFeldsparGarnetMicaNone
Not in a structural groupPyroxeneQuartzSerpentineSmectite-vermiculiteSpinelStauroliteTalc

24 IMA Minerals at location:
Actinolite  (*)Albite  (*)Almandine  (*)Anthophyllite  (*)Beryl  (*)
Chromite  (*)Chrysotile  (*)Columbite-(Mn)  (*)Corundum  (*)Enstatite  (*)
Kyanite  (*)Magnesite  (*)Magnetite  (*)Margarite  (*)Microcline  (*)
Muscovite  (*)Orthoclase  (*)Quartz  (*)Samarskite-(Y)  (*)Sillimanite  (*)
Staurolite  (*)Talc  (*)Tremolite  (*)Vermiculite  (*)
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)22262839,2628403419
Albite  (*)FeldsparNa(AlSi3O8)2262839,2628408803
Almandine  (*)GarnetFe2+3Al2(SiO4)33262839,262840,2628412353
Anthophyllite  (*)Amphibole   Mg2Mg5Si8O22(OH)22262839,262840718
Beryl  (*)BerylBe3Al2Si6O182262839,2628404286
Chromite  (*)SpinelFe2+Cr2O42262839,2628403902
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)41262839951
Columbite-(Mn)  (*)ColumbiteMn2+Nb2O61262839289
Corundum  (*)CorundumAl2O32262839,2628401797
Enstatite  (*)PyroxeneMg2Si2O62262839,262840944
Kyanite  (*)Not in a structural groupAl2OSiO412628391507
Magnesite  (*)CalciteMg(CO3)12628401487
Magnetite  (*)SpinelFe2+Fe3+2O4126283914899
Margarite  (*)Mica ClayCaAl2Si2Al2O10(OH)21262839168
Microcline  (*)FeldsparK(AlSi3O8)3262839,262840,2628414924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2126283917380
Orthoclase  (*)FeldsparK(AlSi3O8)3262839,262840,2628412349
Quartz  (*)QuartzSiO23262839,262840,26284161156
Samarskite-(Y)  (*)ColumbiteYFe3+Nb2O82262839,262840353
Sillimanite  (*)Not in a structural groupAl2SiO512628391516
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)1262839978
Talc  (*)Clay TalcMg3Si4O10(OH)22262839,2628403337
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)22262839,2628402562
Vermiculite  (*)Clay Smectite-vermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4·8H2O3262839,262840,262841652


No ages have been assigned to this locality yet.
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All locality data graciously provided by mindat.org

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