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:
Guerneville, Guerneville District, Coast Range, Sonoma Co., California, USA


mindat Locality ID: 209098
mindat URL: http://www.mindat.org/loc-209098.html

Tectonic Settings:

Total number of sublocalities beneath "Guerneville, Guerneville District, Coast Range, Sonoma Co., California, USA": 4
Total number of bottom-level sublocalities: 4

Number of Child Localities: 4
Child Localities:
Clar Quarry
Clear Quill Mine
Great Eastern And Mount Jackson Mine (Sonoma Mine; Sonoma Quicksilver Mines; Guerneville Mine; Great Eastern Mine; Mount Jackson Mine)
Walker Prospect

Latitude: 38°31'0"N
Longitude: 122°59'33"W
Decimal Degree (lat, lon): 38.516666666667,-122.9925

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 Ba C Ca Cr Fe H Hg Mg Na Ni O S Si 

Elements from minerals reported directly at this locality: Al Ca H Mg Na O Si 

Structural Groups for minerals in this locality: 
AmorphousAmphiboleBaryteCalciteClayKaoliniteLawsoniteMilleriteNonePyrite
QuartzSphaleriteSpinel

19 IMA Minerals at location:
Ankerite  (*)Baryte  (*)Calcite  (*)Chromite  (*)Cinnabar  (*)
Dolomite  (*)Glaucophane  (*)Kaolinite  (*)Lawsonite  (*)Magnesiochromite  (*)
Magnesite  (*)Magnetite  (*)Mercury  (*)Metacinnabar  (*)Millerite  (*)
Opal  (*)Pyrite  (*)Quartz  (*)Vaesite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Ankerite  (*)NoneCa(Fe2+,Mg)(CO3)211802513092
Baryte  (*)BaryteBa(SO4)118025111547
Calcite  (*)CalciteCa(CO3)118025127770
Chromite  (*)SpinelFe2+Cr2O411802513902
Cinnabar  (*)NoneHgS2180251,1802522600
Dolomite  (*)NoneCaMg(CO3)211802519895
Glaucophane  (*)Amphibole   Na2(Mg3Al2)Si8O22(OH)20286
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)411802515591
Lawsonite  (*)LawsoniteCaAl2(Si2O7)(OH)2·H2O0121
Magnesiochromite  (*)SpinelMgCr2O41180251311
Magnesite  (*)CalciteMg(CO3)11802511487
Magnetite  (*)SpinelFe2+Fe3+2O4118025114899
Mercury  (*)NoneHg1180250397
Metacinnabar  (*)SphaleriteHgS1180251255
Millerite  (*)MilleriteNiS11802511066
Opal  (*)AmorphousSiO2·nH2O11802512994
Pyrite  (*)PyriteFeS2118025139462
Quartz  (*)QuartzSiO2118025161156
Vaesite  (*)PyriteNiS21180251106



No ages have been assigned to this locality yet.

SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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