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:
Mayacmas Mts (Mayacamas Mts), Napa Co., California, USA

Oldest recorded age at locality: 164
Youngest recorded age at locality: 4

mindat Locality ID: 209460
mindat URL: http://www.mindat.org/loc-209460.html

Tectonic Settings:

Total number of sublocalities beneath "Mayacmas Mts (Mayacamas Mts), Napa Co., California, USA": 110
Total number of bottom-level sublocalities: 92

Number of Child Localities: 3
Child Localities:
Calistoga District (Silverado District)
East Mayacmas District
Oakville District

Latitude: 38°33'44"N
Longitude: 122°27'41"W
Decimal Degree (lat, lon): 38.562222222222,-122.46138888889

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 Cu Fe H Hg K Mg Mn Na Ni O Pb S Sb Se Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AcanthiteAmorphousArsenopyriteBaryteBotryogenCalciteClayCopperCoquimbiteCorundum
CristobaliteEpsomiteGypsumKaoliniteMarcasiteMelanteriteMilleriteNoneNot in a structural groupPyrite
QuartzRocksaltRömeriteSmectite-vermiculiteSphaleriteSpinelStarkeyiteSulphur

43 IMA Minerals at location:
Acanthite  (*)Arsenopyrite  (*)Baryte  (*)Botryogen  (*)Calcite  (*)
Calomel  (*)Chlorargyrite  (*)Chromite  (*)Cinnabar  (*)Copper  (*)
Coquimbite  (*)Crednerite  (*)Cristobalite  (*)Cuprite  (*)Dolomite  (*)
Epsomite  (*)Fibroferrite  (*)Galena  (*)Gold  (*)Gypsum  (*)
Hematite  (*)Kalinite  (*)Kaolinite  (*)Magnesiochromite  (*)Magnesite  (*)
Marcasite  (*)Melanterite  (*)Mercury  (*)Metacinnabar  (*)Millerite  (*)
Morenosite  (*)Opal  (*)Proustite  (*)Pyrargyrite  (*)Pyrite  (*)
Quartz  (*)Rhodochrosite  (*)Römerite  (*)Rozenite  (*)Saponite  (*)
Silver  (*)Sulphur  (*)Tiemannite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Acanthite  (*)AcanthiteAg2S11649982793
Arsenopyrite  (*)ArsenopyriteFeAsS11649989052
Baryte  (*)BaryteBa(SO4)116508611547
Botryogen  (*)BotryogenMgFe3+(SO4)2(OH)·7H2O116499845
Calcite  (*)CalciteCa(CO3)2165033,16503927770
Calomel  (*)NoneHgCl116504091
Chlorargyrite  (*)RocksaltAgCl11649981382
Chromite  (*)SpinelFe2+Cr2O416416416165003,165027,165028,165029,165031,165032,165045,165048,165059,165061,165065,165069,165070,165071,165072,1650733902
Cinnabar  (*)NoneHgS23164993,164994,164995,165002,165003,165009,165010,165012,165013,165026,165030,165033,165036,165039,165040,165041,165055,165056,165066,165079,165086,165088,1650912600
Copper  (*)CopperCu11650223846
Coquimbite  (*)CoquimbiteAlFe3(SO4)6(H2O)12·6H2O1165002136
Crednerite  (*)NoneCuMnO22164991,16500835
Cristobalite  (*)CristobaliteSiO21165079453
Cuprite  (*)Not in a structural groupCu2O11650222970
Dolomite  (*)NoneCaMg(CO3)211650029895
Epsomite  (*)EpsomiteMg(SO4)·7H2O1165040484
Fibroferrite  (*)Not in a structural groupFe3+(SO4)(OH)·5H2O1164991107
Galena  (*)RocksaltPbS116499824243
Gold  (*)CopperAu116499830554
Gypsum  (*)GypsumCa(SO4)·2H2O11649986890
Hematite  (*)CorundumFe2O3116501814640
Kalinite  (*)NoneKAl(SO4)2·11H2O116498654
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)43165012,165039,1650405591
Magnesiochromite  (*)SpinelMgCr2O41165081311
Magnesite  (*)CalciteMg(CO3)11650821487
Marcasite  (*)MarcasiteFeS22164998,1650025674
Melanterite  (*)MelanteriteFe(SO4)·7H2O2164998,165002915
Mercury  (*)NoneHg6165002,165011,165026,165040,165086,165088397
Metacinnabar  (*)SphaleriteHgS3165002,165026,165040255
Millerite  (*)MilleriteNiS4165003,165026,165040,1650661066
Morenosite  (*)EpsomiteNi(SO4)·7H2O116506684
Opal  (*)AmorphousSiO2·nH2O5164995,165002,165010,165013,1650872994
Proustite  (*)NoneAg3AsS31164998733
Pyrargyrite  (*)NoneAg3SbS32164993,1649981425
Pyrite  (*)PyriteFeS29165002,165012,165026,165033,165039,165040,165066,165086,16508839462
Quartz  (*)QuartzSiO26164988,164998,165033,165039,165086,16508861156
Rhodochrosite  (*)CalciteMn(CO3)11650101711
Römerite  (*)RömeriteFe2+Fe3+2(SO4)4·14H2O1165002115
Rozenite  (*)StarkeyiteFe2+(SO4)·4H2O1165002293
Saponite  (*)Clay Smectite-vermiculite(Ca,Na)0.3(Mg,Fe)3(Si,Al)4O10(OH)2·4H2O1165003301
Silver  (*)CopperAg11649985186
Sulphur  (*)SulphurS11650402045
Tiemannite  (*)SphaleriteHgSe116499483



5 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-00339164164Middle Jurassic (161-168 Ma)       Cr83705Reeve Claims, Angwin, Calistoga District (Silverado District), Mayacmas Mts (Mayacamas Mts), Napa Co., California, USAReeve ClaimsMoiser et al. (2012) USGSSIR2012_5157 
NAVDAT-29545867±1   29545    83662Glass Mountain Deposit, St. Helena, Calistoga District (Silverado District), Mayacmas Mts (Mayacamas Mts), Napa Co., California, USA NAVDAT NAVDAT 
NAVDAT-29606846±2   29606    83662Glass Mountain Deposit, St. Helena, Calistoga District (Silverado District), Mayacmas Mts (Mayacamas Mts), Napa Co., California, USA NAVDAT NAVDAT 
podchrome-00335164164Middle Jurassic (161-168 Ma)       Cr83637Astute Mine, Aetna Springs, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Napa Co., California, USAAstuteMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00337164164Middle Jurassic (161-168 Ma)       Cr83656Elder Claim, Pope Valley, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Napa Co., California, USAElder ClaimMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


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