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:
Pearsoll Peak Area, Josephine Co., Oregon, USA

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

mindat Locality ID: 207615
mindat URL: http://www.mindat.org/loc-207615.html

Tectonic Settings:

Total number of sublocalities beneath "Pearsoll Peak Area, Josephine Co., Oregon, USA": 10
Total number of bottom-level sublocalities: 10

Number of Child Localities: 10
Child Localities:
Chrome King No. 3 (Part Of Chrome King Group)
Chrome Placer (McCaleb; Dobson)
Chrome Prospect (MRDS - 10033220)
Chrome Prospect (MRDS - 10053419)
Saddle Chrome (Kerby No. 91)
Twin Cedars Claims
Unnamed Chromium Prospect (MRDS - 10048473)
Unnamed Chromium Prospect (MRDS - 10048480)
Unnamed Chromium Prospect (MRDS - 10298925)
Young's Mine (Dailey Dozen Claims)

Latitude: 42°17'32"N
Longitude: 123°49'12"W
Decimal Degree (lat, lon): 42.292222222222,-123.82

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: Ca Cr Fe H Mg O Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ClayGarnetNoneSpinelTalc

4 IMA Minerals at location:
Chromite  (*)Magnetite  (*)Talc  (*)Uvarovite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Chromite  (*)SpinelFe2+Cr2O41631638260039,260040,260041,260043,260044,260045,260046,2600483902
Magnetite  (*)SpinelFe2+Fe3+2O4163163126003914899
Talc  (*)Clay TalcMg3Si4O10(OH)21631634260039,260043,260044,2600483337
Uvarovite  (*)GarnetCa3Cr2(SiO4)31631632260044,260048212



6 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-00376163163Middle Jurassic (164-162 Ma)     Yes Cr148037Chrome King No. 1 (Chrome King Mine; Daley Creek Chrome), Central Illinois River District, Josephine Co., Oregon, USAChrome KingMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00357163163Middle Jurassic (164-162 Ma)       Cr151404Saddle Chrome (Kerby No. 91), Pearsoll Peak Area, Josephine Co., Oregon, USASaddle ChromeMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00353163163Middle Jurassic (164-162 Ma)       Cr152004Twin Cedars Claims, Pearsoll Peak Area, Josephine Co., Oregon, USATwin Cedars UpperMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00354163163Middle Jurassic (164-162 Ma)       Cr152004Twin Cedars Claims, Pearsoll Peak Area, Josephine Co., Oregon, USATwin Cedars LowerMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00355163163Middle Jurassic (164-162 Ma)       Cr153492Young's Mine (Dailey Dozen Claims), Pearsoll Peak Area, Josephine Co., Oregon, USAYoung's Mine (No. 7)Moiser et al. (2012) USGSSIR2012_5157 
podchrome-00356163163Middle Jurassic (164-162 Ma)       Cr153492Young's Mine (Dailey Dozen Claims), Pearsoll Peak Area, Josephine Co., Oregon, USAYoung's Mine (No. 4)Moiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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