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:
Fiddletown District (Oleta District), Amador Co., California, USA


mindat Locality ID: 73621
mindat URL: http://www.mindat.org/loc-73621.html

Tectonic Settings:

Total number of sublocalities beneath "Fiddletown District (Oleta District), Amador Co., California, USA": 38
Total number of bottom-level sublocalities: 36

Number of Child Localities: 2
Child Localities:
Fiddletown (Oleta)
River Pines

Latitude: 38°30'53"N
Longitude: 120°44'37"W
Decimal Degree (lat, lon): 38.514722222222,-120.74361111111
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 Au C H Mn O Si Ti 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousCalciteCopperDiamondGarnetHumiteNoneOlivineQuartzRutile

10 IMA Minerals at location:
Alleghanyite  (*)Diamond  (*)Gold  (*)Opal  (*)Pyrolusite  (*)
Quartz  (*)Rhodochrosite  (*)Rutile  (*)Spessartine  (*)Tephroite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Alleghanyite  (*)HumiteMn2+5(SiO4)2(OH)22150854,15086077
Diamond  (*)DiamondC2150858,150859697
Gold  (*)CopperAu13150847,150848,150849,150852,150855,150861,150863,150864,150867,150875,150876,150877,15087830554
Opal  (*)AmorphousSiO2·nH2O11508742994
Pyrolusite  (*)RutileMnO211508603106
Quartz  (*)QuartzSiO23150862,150865,15086861156
Rhodochrosite  (*)CalciteMn(CO3)2150854,1508601711
Rutile  (*)RutileTiO211508685614
Spessartine  (*)GarnetMn2+3Al2(SiO4)311508541214
Tephroite  (*)OlivineMn2+2(SiO4)2150854,150860240


No ages have been assigned to this locality yet.

All locality data graciously provided by mindat.org

All age data...

Other copyright data...