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:
Washington Co., Arkansas, USA


mindat Locality ID: 187551
mindat URL: http://www.mindat.org/loc-187551.html

Tectonic Settings:

Total number of sublocalities beneath "Washington Co., Arkansas, USA": 7
Total number of bottom-level sublocalities: 5

Number of Child Localities: 4
Child Localities:
Farmington (Engels Mills)
Fayetteville
Rhea (Rhea Mill; Rheas Mills; Rhea's Mill)
Unnamed Locality

Latitude: 36°3'23"N
Longitude: 94°12'11"W
Decimal Degree (lat, lon): 36.056388888889,-94.203055555556

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: C Ca Cr Cu Fe H Mg Na Ni O P Pb S Si Sr Ti Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousAragoniteBaryteCalciteCeriteCopperCorundumCubaniteGypsumIron
NoneRocksaltSphaleriteSpinel

17 IMA Minerals at location:
Aragonite  (*)Calcite  (*)Celestine  (*)Chromite  (*)Copper  (*)
Galena  (*)Gypsum  (*)Ilmenite  (*)Iron  (*)Isocubanite  (*)
Merrillite  (*)Opal  (*)Siderite  (*)Sphalerite  (*)Taenite  (*)
Tetrataenite  (*)Troilite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Aragonite  (*)AragoniteCa(CO3)11503423250
Calcite  (*)CalciteCa(CO3)115034327770
Celestine  (*)BaryteSr(SO4)11503431252
Chromite  (*)SpinelFe2+Cr2O411503443902
Copper  (*)CopperCu11503443846
Galena  (*)RocksaltPbS115034624243
Gypsum  (*)GypsumCa(SO4)·2H2O11503476890
Ilmenite  (*)CorundumFe2+Ti4+O311503445433
Iron  (*)IronFe11503441089
Isocubanite  (*)Sphalerite CubaniteCuFe2S31150344191
Merrillite  (*)CeriteCa9NaMg(PO4)71150344230
Opal  (*)AmorphousSiO2·nH2O11503412994
Siderite  (*)CalciteFe(CO3)11503436417
Sphalerite  (*)SphaleriteZnS115034621482
Taenite  (*)None(Ni,Fe)1150344703
Tetrataenite  (*)NoneFeNi1150344116
Troilite  (*)NoneFeS11503441044



No ages have been assigned to this locality yet.

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