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:
Healdsburg, Sonoma Co., California, USA


mindat Locality ID: 211521
mindat URL: http://www.mindat.org/loc-211521.html

Tectonic Settings:

Total number of sublocalities beneath "Healdsburg, Sonoma Co., California, USA": 25
Total number of bottom-level sublocalities: 20

Number of Child Localities: 19
Child Localities:
Austin Creek
Baby Jack Occurrence
Basalt Rock Company
Brooks Quarry
Derrick Tin Prospect
Foppiano Quarry
Inman Shale Quarry
Junction School
McPherson Ranch
Mill Creek
Mill Creek Area
Mill Creek Road
Porter Creek
Purviance Ranch (Ward Ranch)
Southwest Of Healdsburg
Unnamed Cr Occurrence (7)
Unnamed Eclogite Occurrence (1)
Unnamed Sn Prospect (1)
US Highway 101 Roadcut

Latitude: 38°37'16"N
Longitude: 122°53'6"W
Decimal Degree (lat, lon): 38.621111111111,-122.885
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 C Ca Fe H K Mg Na O Pb S Si Ti Zr 

Elements from minerals reported directly at this locality: C O Pb 

Structural Groups for minerals in this locality: 
AmphiboleAragoniteClayClinozoisiteCorundumEpidoteGarnetLawsoniteMicaNone
PyritePyroxeneQuartzRutileSerpentineTalcTitaniteZircon

20 IMA Minerals at location:
Actinolite  (*)Almandine  (*)Antigorite  (*)Aragonite  (*)Cerussite  (*)
Clinozoisite  (*)Epidote  (*)Glaucophane  (*)Graphite  (*)Ilmenite  (*)
Lawsonite  (*)Muscovite  (*)Omphacite  (*)Pyrite  (*)Quartz  (*)
Riebeckite  (*)Rutile  (*)Talc  (*)Titanite  (*)Zircon  (*)
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)211803413419
Almandine  (*)GarnetFe2+3Al2(SiO4)32180341,1803552353
Antigorite  (*)Serpentine ClayMg3Si2O5(OH)41180346708
Aragonite  (*)AragoniteCa(CO3)11803553250
Cerussite  (*)AragonitePb(CO3)04979
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)11803551025
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)11803558173
Glaucophane  (*)Amphibole   Na2(Mg3Al2)Si8O22(OH)25180341,180346,180349,180352,180355286
Graphite  (*)NoneC2180343,1803532812
Ilmenite  (*)CorundumFe2+Ti4+O311803555433
Lawsonite  (*)LawsoniteCaAl2(Si2O7)(OH)2·H2O2180346,180349121
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)23180346,180349,18035517380
Omphacite  (*)Pyroxene(Ca,Na)(Mg,Fe,Al)Si2O62180348,180355229
Pyrite  (*)PyriteFeS2118033339462
Quartz  (*)QuartzSiO2118035561156
Riebeckite  (*)Amphibole   Na2(Fe2+3Fe3+2)Si8O22(OH)22180346,180349375
Rutile  (*)RutileTiO211803555614
Talc  (*)Clay TalcMg3Si4O10(OH)211803463337
Titanite  (*)TitaniteCaTi(SiO4)O2180345,1803554899
Zircon  (*)ZirconZr(SiO4)11803555251


No ages have been assigned to this locality yet.
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All locality data graciously provided by mindat.org

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