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:
Knoxville, Knoxville District, Napa Co., California, USA

Oldest recorded age at locality: 164
Youngest recorded age at locality: 164

mindat Locality ID: 22758
mindat URL: http://www.mindat.org/loc-22758.html

Tectonic Settings:

Total number of sublocalities beneath "Knoxville, Knoxville District, Napa Co., California, USA": 19
Total number of bottom-level sublocalities: 19

Number of Child Localities: 19
Child Localities:
Andalusia Mine
Grey Claim (Grey Mine)
Juniper Group
McLaughlin Mine (Manhattan Mine)
Moore Mine (Marshall And Vanderbilt Claims)
Mullaly Mine
Northern Light Mine
Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine)
Unnamed Chromite Prospect (5)
Unnamed Cr Occurrence (11)
Unnamed Cr Occurrence (7)
Unnamed Cr Occurrence (9)
Unnamed Cr Prospect (1)
Unnamed Cr Prospect (14)
Unnamed Cr Prospect (2)
Unnamed Gemstone Occurrence (1)
Unnamed Hg Occurrence (3)
Unnamed Hg Prospect Pit (1)
White Rock Occurrence

Latitude: 38°48'43"N
Longitude: 122°21'18"W
Decimal Degree (lat, lon): 38.811944444444,-122.355

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 Ba C Ca Cl Cr Fe H Hg K Mg Mn N Na Ni O Pb S Sb Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AluniteAmarantiteAmorphousAragoniteArsenoliteArsenopyriteBaryteBotryogenCalciteClay
CopiapiteCopperCoquimbiteEpsomiteFeldsparHalotrichiteKaoliniteMarcasiteMelanteriteMica
MilleriteNoneNot in a structural groupPyriteQuartzRutileSmectite-vermiculiteSphaleriteSpinelStibnite
SulphurVoltaite

43 IMA Minerals at location:
Alunogen  (*)Ammonioalunite  (*)Aragonite  (*)Arsenopyrite  (*)Baryte  (*)
Botryogen  (*)Buddingtonite  (*)Calcite  (*)Calomel  (*)Chromite  (*)
Cinnabar  (*)Copiapite  (*)Coquimbite  (*)Epsomite  (*)Fibroferrite  (*)
Gold  (*)Hohmannite  (*)Idrialite  (*)Jamesonite  (*)Kaolinite  (*)
Magnesiocopiapite  (*)Magnesite  (*)Marcasite  (*)Melanterite  (*)Mercury  (*)
Metacinnabar  (*)Miargyrite  (*)Millerite  (*)Mirabilite  (*)Montmorillonite  (*)
Montroydite  (*)Muscovite  (*)Opal  (*)Pyrargyrite  (*)Pyrite  (*)
Pyrolusite  (*)Quartz  (*)Redingtonite  (*)Senarmontite  (*)Siderite  (*)
Stibnite  (*)Sulphur  (*)Voltaite  (*)
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)12·5H2O1164952272
Ammonioalunite  (*)Alunite(NH4)Al3(SO4)2(OH)6116495211
Aragonite  (*)AragoniteCa(CO3)11649523250
Arsenopyrite  (*)ArsenopyriteFeAsS2164952,1649569052
Baryte  (*)BaryteBa(SO4)116495211547
Botryogen  (*)BotryogenMgFe3+(SO4)2(OH)·7H2O116495645
Buddingtonite  (*)Feldspar(NH4)(AlSi3)O8116495227
Calcite  (*)CalciteCa(CO3)116495227770
Calomel  (*)NoneHgCl116495691
Chromite  (*)SpinelFe2+Cr2O41641648164950,164953,164954,164956,164957,164961,164962,1649633902
Cinnabar  (*)NoneHgS4164949,164952,164955,1649562600
Copiapite  (*)CopiapiteFe2+Fe3+4(SO4)6(OH)2·20H2O1164956382
Coquimbite  (*)CoquimbiteAlFe3(SO4)6(H2O)12·6H2O1164956136
Epsomite  (*)EpsomiteMg(SO4)·7H2O1164956484
Fibroferrite  (*)Not in a structural groupFe3+(SO4)(OH)·5H2O1164956107
Gold  (*)CopperAu116495230554
Hohmannite  (*)AmarantiteFe3+2O(SO4)2·8H2O116495610
Idrialite  (*)NoneC22H14116495615
Jamesonite  (*)NonePb4FeSb6S141164952784
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)411649525591
Magnesiocopiapite  (*)CopiapiteMgFe3+4(SO4)6(OH)2·20H2O116495654
Magnesite  (*)CalciteMg(CO3)11649561487
Marcasite  (*)MarcasiteFeS22164952,1649565674
Melanterite  (*)MelanteriteFe(SO4)·7H2O2164952,164956915
Mercury  (*)NoneHg1164952397
Metacinnabar  (*)SphaleriteHgS2164952,164956255
Miargyrite  (*)NoneAgSbS21164952300
Millerite  (*)MilleriteNiS11649491066
Mirabilite  (*)NoneNa2(SO4)·10H2O1164956223
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O11649521508
Montroydite  (*)NoneHgO116495229
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2116495217380
Opal  (*)AmorphousSiO2·nH2O2164952,1649562994
Pyrargyrite  (*)NoneAg3SbS311649521425
Pyrite  (*)PyriteFeS2116495239462
Pyrolusite  (*)RutileMnO22164952,1649563106
Quartz  (*)QuartzSiO22164952,16495661156
Redingtonite  (*)HalotrichiteFe2+Cr2(SO4)4·22H2O11649562
Senarmontite  (*)ArsenoliteSb2O31164952179
Siderite  (*)CalciteFe(CO3)11649566417
Stibnite  (*)StibniteSb2S32164952,1649563418
Sulphur  (*)SulphurS11649562045
Voltaite  (*)VoltaiteK2Fe2+5Fe3+3Al(SO4)12·18H2O1164956111



4 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
podchrome-00330164164Middle Jurassic (161-168 Ma)       Cr83666Grey Claim (Grey Mine), Knoxville, Knoxville District, Napa Co., California, USAGrey ClaimMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00331164164Middle Jurassic (161-168 Ma)       Cr83684Moore Mine (Marshall And Vanderbilt Claims), Knoxville, Knoxville District, Napa Co., California, USAMoore (Vanderbilt Claim)Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00332164164Middle Jurassic (161-168 Ma)       Cr83684Moore Mine (Marshall And Vanderbilt Claims), Knoxville, Knoxville District, Napa Co., California, USAMoore (Marshall Claim)Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00333164164Middle Jurassic (161-168 Ma)       Cr83687Mullaly Mine, Knoxville, Knoxville District, Napa Co., California, USAMullalyMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL
R070581Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine), Knoxville, Knoxville District, Napa Co., California, USAhttps://rruff.info/R070581


All locality data graciously provided by mindat.org

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