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:
Camp Meeker, Coast Range, Sonoma Co., California, USA

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

mindat Locality ID: 212340
mindat URL: http://www.mindat.org/loc-212340.html

Tectonic Settings:

Total number of sublocalities beneath "Camp Meeker, Coast Range, Sonoma Co., California, USA": 7
Total number of bottom-level sublocalities: 7

Number of Child Localities: 7
Child Localities:
Baldrini Prospect
Gaver Prospect
Meeker Ocher Deposit
Sonoma Chrome Inc. Deposit (Meeker Chrome Mine)
Unnamed Cr Occurrence (3)
Unnamed Cr Occurrence (5)
Unnamed Zoisite Occurrence (2)

Latitude: 38°26'1"N
Longitude: 122°57'36"W
Decimal Degree (lat, lon): 38.433611111111,-122.96

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 Ca Cr Fe H Mg Na O Si 

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

Structural Groups for minerals in this locality: 
AmphiboleEpidoteGarnetLawsoniteNoneSpinel

6 IMA Minerals at location:
Actinolite  (*)Almandine  (*)Chromite  (*)Glaucophane  (*)Lawsonite  (*)
Zoisite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)216416403419
Almandine  (*)GarnetFe2+3Al2(SiO4)316416402353
Chromite  (*)SpinelFe2+Cr2O41641642180208,1802103902
Glaucophane  (*)Amphibole   Na2(Mg3Al2)Si8O22(OH)21641640286
Lawsonite  (*)LawsoniteCaAl2(Si2O7)(OH)2·H2O1641640121
Zoisite  (*)EpidoteCa2Al3[Si2O7][SiO4]O(OH)11802131025



1 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-00344164164Middle Jurassic (161-168 Ma)       Cr95768Sonoma Chrome Inc. Deposit (Meeker Chrome Mine), Camp Meeker, Coast Range, Sonoma Co., California, USASonoma ChromeMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


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