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:
Como District, Lyon Co., Nevada, USA


mindat Locality ID: 36927
mindat URL: http://www.mindat.org/loc-36927.html

Tectonic Settings:

Total number of sublocalities beneath "Como District, Lyon Co., Nevada, USA": 13
Total number of bottom-level sublocalities: 13

Number of Child Localities: 13
Child Localities:
Boyle Tunnel
Como Mine (Como Consolidated Mine; Como-Eureka Mine)
Elgin Mine
Frederick's Mine
Hulley-Logan Mine
Lucky Sunday Mine
Peer Mine
Pony Meadows Mine
Rapidan Mine
Star Of The West Mine
Sunrise Mine
Wild Rose Mine
Yerkes Mine

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: Ag Al As Au C Ca Cl Cu Fe H K Mg Na O S Sb Si Zn 

Elements from minerals reported directly at this locality: Ag Al As Au C Ca Cl Cu Fe H K Mg Na O S Sb Si 

Structural Groups for minerals in this locality: 
AcanthiteCalciteChalcopyriteClayCopperDiasporeKaoliniteMarcasiteMicaNone
PolybasitePyritePyrophylliteQuartzRocksaltSmectite-vermiculiteSphaleriteStibniteTetrahedrite

21 IMA Minerals at location:
Acanthite  (*)Alunite  (*)Calcite  (*)Chalcopyrite  (*)Chlorargyrite  (*)
Diaspore  (*)Dickite  (*)Gold  (*)Kaolinite  (*)Marcasite  (*)
Montmorillonite  (*)Muscovite  (*)Polybasite  (*)Proustite  (*)Pyrargyrite  (*)
Pyrite  (*)Pyrophyllite  (*)Quartz  (*)Sphalerite  (*)Stibnite  (*)
Tetrahedrite-(Zn)  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Acanthite  (*)AcanthiteAg2S02793
Alunite  (*)NoneKAl3(SO4)2(OH)60966
Calcite  (*)CalciteCa(CO3)027770
Chalcopyrite  (*)ChalcopyriteCuFeS2027198
Chlorargyrite  (*)RocksaltAgCl01382
Diaspore  (*)DiasporeAlO(OH)1238808481
Dickite  (*)Clay KaoliniteAl2Si2O5(OH)40651
Gold  (*)CopperAu030554
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)412388085591
Marcasite  (*)MarcasiteFeS205674
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O01508
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2123880817380
Polybasite  (*)Polybasite[Ag9CuS4][(Ag,Cu)6(Sb,As)2S7]0716
Proustite  (*)NoneAg3AsS32238805,238815733
Pyrargyrite  (*)NoneAg3SbS32238805,2388151425
Pyrite  (*)PyriteFeS2039462
Pyrophyllite  (*)Clay PyrophylliteAl2Si4O10(OH)20771
Quartz  (*)QuartzSiO22238804,23880861156
Sphalerite  (*)SphaleriteZnS2238805,23881521482
Stibnite  (*)StibniteSb2S303418
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S132238805,2388155317


No ages have been assigned to this locality yet.

All locality data graciously provided by mindat.org

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