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:
East Falls, Fairmount Park, Philadelphia, Philadelphia Co., Pennsylvania, USA


mindat Locality ID: 204243
mindat URL: http://www.mindat.org/loc-204243.html

Tectonic Settings:

Total number of sublocalities beneath "East Falls, Fairmount Park, Philadelphia, Philadelphia Co., Pennsylvania, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Ridge Avenue And School Lane Quarries

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 Cl Fe H K Mg O P Pb S Si Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ApatiteClayFeldsparHalotrichiteMicaNoneNot in a structural groupPyriteQuartzRocksalt
Smectite-vermiculiteSphaleriteWurtzite

12 IMA Minerals at location:
Alunogen  (*)Galena  (*)Halotrichite  (*)Microcline  (*)Muscovite  (*)
Pyrite  (*)Pyromorphite  (*)Quartz  (*)Sillimanite  (*)Sphalerite  (*)
Vermiculite  (*)Wurtzite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Alunogen  (*)Not in a structural groupAl2(SO4)3(H2O)12·5H2O1263236272
Galena  (*)RocksaltPbS126323624243
Halotrichite  (*)HalotrichiteFe2+Al2(SO4)4·22H2O1263236409
Microcline  (*)FeldsparK(AlSi3O8)12632364924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2126323617380
Pyrite  (*)PyriteFeS2126323639462
Pyromorphite  (*)ApatitePb5(PO4)3Cl12632361725
Quartz  (*)QuartzSiO2126323661156
Sillimanite  (*)Not in a structural groupAl2SiO512632361516
Sphalerite  (*)SphaleriteZnS126323621482
Vermiculite  (*)Clay Smectite-vermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4·8H2O1263236652
Wurtzite  (*)WurtziteZnS1263236372


No ages have been assigned to this locality yet.

All locality data graciously provided by mindat.org

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