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 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:
Piedra, Fresno Co., California, USA

Oldest recorded age at locality: 210
Youngest recorded age at locality: 80

mindat Locality ID: 210019
mindat URL: http://www.mindat.org/loc-210019.html

Tectonic Settings:

Total number of sublocalities beneath "Piedra, Fresno Co., California, USA": 8
Total number of bottom-level sublocalities: 7

Number of Child Localities: 6
Child Localities:
Eliza Jane Mine
Fresno Magnesite Mine (Piedra Magnesite Company; Piedra Mine; Balcher Mine; Ward)
J. B. Siebert Occurrence
Pine Flat
Unnamed Clinochlore Occurrence [1]
Unnamed Magnesite Mine [2]

Latitude: 36°49'54"N
Longitude: 119°23'18"W
Decimal Degree (lat, lon): 36.831666666667,-119.38833333333
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 Cu H Mg O Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
CalciteChloriteClayNone

3 IMA Minerals at location:
Clinochlore  (*)Magnesite  (*)Tenorite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Clinochlore  (*)Chlorite ClayMg5Al(AlSi3O10)(OH)82108011559791756
Magnesite  (*)CalciteMg(CO3)210803155974,155975,1559801487
Tenorite  (*)NoneCuO1008011559771101


Locality Notes from all Ages at Locality:
Age IDLocality Notes
Michelle_399Gabbro, Pine Flat road, 1 km N of Hwy. 180 See Table A1.


22 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
USGS-U-Th-Pb-00588_206_238177177177206_238 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00588_207_206210210210207_206 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00588_207_235179.2179.2179.2207_235 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00589_206_238165.6165.6165.6206_238 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00589_207_206206206206207_206 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00589_207_235169169169207_235 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00590_206_238160.5160.5160.5206_238 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00590_207_206202202202207_206 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00590_207_235163.1163.1163.1207_235 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00591_206_238157.9157.9157.9206_238 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00591_207_206198198198207_206 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00591_207_235160.4160.4160.4207_235 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00619_206_238150150150206_238 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00619_207_206187187187207_206 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00619_207_235152.1152.1152.1207_235 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00620_206_238145.1145.1145.1206_238 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00620_207_206190190190207_206 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00620_207_235147.7147.7147.7207_235 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00621_206_238144.2144.2144.2206_238 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00621_207_206180180180207_206 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00621_207_235146.2146.2146.2207_235 zircon   Zircon  210019Piedra, Fresno Co., California, USA USGS-U-Th-Pb USGS-U-Th-Pb 
Michelle_39910080<100U-PbPreferred intrusive agezircon4  Zircon  252174Pine Flat, Piedra, Fresno Co., California, USAPine Flat RoadChen and Moore (1982)10.1029/JB087iB06p04761AJS299_93See p. 4768, Table 2. Age group LK (Late Cretaceous 80-100 ma).

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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