Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org

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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:
San Luis Obispo, San Luis Obispo Co., California, USA

Oldest recorded age at locality: 163
Youngest recorded age at locality: 163

mindat Locality ID: 217850
mindat URL: http://www.mindat.org/loc-217850.html

Tectonic Settings:

Total number of sublocalities beneath "San Luis Obispo, San Luis Obispo Co., California, USA": 19
Total number of bottom-level sublocalities: 18

Number of Child Localities: 18
Child Localities:
Barneberg Mine
Bishop's Peak Quarry
Dougherty Quarry
East Of San Luis Obispo
Frank Tate Ranch Pit
Froom Ranch Mine (Froom Ranch Deposit; Mrs. Froom's Chrome Deposits)
Goldtree Vineyard Mine
Parker Red Rock Pit
Prefumo Canyon
San Luis Brick Works Inc.
Sousa Ranch Deposit
Unnamed Chromite Mine (3)
Unnamed Co Occurrence
Unnamed Diatomite Deposit (1)
Unnamed Gemstone Occurrence
Unnamed Gravel Pit (1)
Unnamed Mn Occurrence (1)
Yoakum Tract (Yoskum Tract)

Latitude: 35°15'26"N
Longitude: 120°40'33"W
Decimal Degree (lat, lon): 35.257222222222,-120.67583333333

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 As C Ca Co Cr Fe H Mg Mn Ni O Si 

Elements from minerals reported directly at this locality: C Cr Fe H Ni O 

Structural Groups for minerals in this locality: 
AmorphousCalciteLawsoniteNoneRutileSpinelVivianite

10 IMA Minerals at location:
Chromite  (*)Erythrite  (*)Hausmannite  (*)Lawsonite  (*)Magnesiochromite  (*)
Opal  (*)Pyrolusite  (*)Rhodochrosite  (*)Spinel  (*)Zaratite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Chromite  (*)SpinelFe2+Cr2O416316303902
Erythrite  (*)VivianiteCo3(AsO4)2·8H2O1175459814
Hausmannite  (*)SpinelMn2+Mn3+2O41175455350
Lawsonite  (*)LawsoniteCaAl2(Si2O7)(OH)2·H2O1175449121
Magnesiochromite  (*)SpinelMgCr2O41175451311
Opal  (*)AmorphousSiO2·nH2O11754602994
Pyrolusite  (*)RutileMnO211754553106
Rhodochrosite  (*)CalciteMn(CO3)11754551711
Spinel  (*)SpinelMgAl2O411754611934
Zaratite  (*)AmorphousNi3(CO3)(OH)4·4H2O163163056



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-00016163163Middle Jurassic (163.3±1.1 Ma, U-Pb apatite-feldspar isochron in gabbro)       Cr91983Sousa Ranch Deposit, San Luis Obispo, San Luis Obispo Co., California, USASousa RanchMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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