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:
Ziehlke Claims Group [1948] (Last Chance Claim; Morning Glory Claim; Murphy Lease; Pereira Property; C. M. Quigg Lease On Pereira Property [1918]; C And M Quigg Lease), Peoria Flat, Yosemite Junction, Tuolumne Co., California, USA

Oldest recorded age at locality: 281
Youngest recorded age at locality: 281

mindat Locality ID: 219370
mindat URL: http://www.mindat.org/loc-219370.html

Tectonic Settings:

Total number of sublocalities beneath "Ziehlke Claims Group [1948] (Last Chance Claim; Morning Glory Claim; Murphy Lease; Pereira Property; C. M. Quigg Lease On Pereira Property [1918]; C And M Quigg Lease), Peoria Flat, Yosemite Junction, Tuolumne Co., California, USA": 4
Total number of bottom-level sublocalities: 4

Number of Child Localities: 4
Child Localities:
North End Claim (North End Mine)
Shafer Lease Occurrence (Pereira Mine [1918])
Spotted Fawn Mine (Spotted Fawn Claim; U.S.A. Mine [1918])
West End Claim (CM Quigg Lease)

Latitude: 37°54'21"N
Longitude: 120°30'3"W
Decimal Degree (lat, lon): 37.905833333333,-120.50083333333

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: Cr Mg O 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
NoneSpinel

1 IMA Minerals at location:
Magnesiochromite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Magnesiochromite  (*)SpinelMgCr2O42812814183739,183740,183741,183742311



2 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-00095281281Permian (280±3 m.y. 206Pb/238U, 282±3 m.y. 207Pb/235U)       Cr98189Shafer Lease Occurrence (Pereira Mine [1918]), Ziehlke Claims Group [1948] (Last Chance Claim; Morning Glory Claim; Murphy Lease; Pereira Property; C. M. Quigg Lease On Pereira Property [1918]; C And M Quigg Lease), Peoria Flat, Yosemite Junction, Tuolumne Co., California, USAShafer LeaseMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00094281281Permian (280±3 m.y. 206Pb/238U, 282±3 m.y. 207Pb/235U)       Cr98219Spotted Fawn Mine (Spotted Fawn Claim; U.S.A. Mine [1918]), Ziehlke Claims Group [1948] (Last Chance Claim; Morning Glory Claim; Murphy Lease; Pereira Property; C. M. Quigg Lease On Pereira Property [1918]; C And M Quigg Lease), Peoria Flat, Yosemite Junction, Tuolumne Co., California, USAZiehlke Spotted FawnMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


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