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:
Hearst, Coastal Range, Mendocino Co., California, USA


mindat Locality ID: 45250
mindat URL: http://www.mindat.org/loc-45250.html

Tectonic Settings:

Total number of sublocalities beneath "Hearst, Coastal Range, Mendocino Co., California, USA": 17
Total number of bottom-level sublocalities: 14

Number of Child Localities: 13
Child Localities:
Consolidated Black Leases (Big Tim; Lore Indian)
Consolidated No. 7 Claim
Dorn Prospect
Eden Valley
Ford Canyon Quarry
Foster Mountain Mine (Foster Mountain Deposit; Memorial; Busch; Independant; Lucky Boy)
Harms Prospect
Hinrichs Property
Ocean View Deposit
Sanhedrin Mountain
Scott Claim
Summer Camp Occurrence
Thomas Occurrence

Latitude: 39°30'49"N
Longitude: 123°10'30"W
Decimal Degree (lat, lon): 39.513611111111,-123.175
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: C Ca Cu Fe H Mg Mn O S Si 

Elements from minerals reported directly at this locality: Ca Fe H Mg O Si 

Structural Groups for minerals in this locality: 
AllophaneAmphiboleCalciteChalcopyriteClayCopperMalachiteNoneQuartzRutile

10 IMA Minerals at location:
Actinolite  (*)Bementite  (*)Chalcopyrite  (*)Copper  (*)Inesite  (*)
Malachite  (*)Neotocite  (*)Pyrolusite  (*)Quartz  (*)Rhodochrosite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)203419
Bementite  (*)ClayMn7Si6O15(OH)81163524173
Chalcopyrite  (*)ChalcopyriteCuFeS2116351527198
Copper  (*)CopperCu11635153846
Inesite  (*)NoneCa2Mn2+7Si10O28(OH)2·5H2O2163523,16352450
Malachite  (*)MalachiteCu2(CO3)(OH)2116351512537
Neotocite  (*)Allophane(Mn,Fe)SiO3·H2O (?)2163523,163524186
Pyrolusite  (*)RutileMnO24163512,163513,163518,1635193106
Quartz  (*)QuartzSiO2116351561156
Rhodochrosite  (*)CalciteMn(CO3)3163518,163523,1635241711


No ages have been assigned to this locality yet.
SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

All age data...

Other copyright data...