Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org

Important Update News

The RRUFF Project has been migrated to RRUFF.net. Please update your bookmarks immediately, if you have not done so.

The data on this website is already three years out of date, and the entire website will be taken offline before the end of the year.

We are grateful to NASA for the funding of this effort.




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:
Coffee Creek, Coffee District (Coffee Creek District), Klamath Mts, Trinity Co., California, USA


mindat Locality ID: 212944
mindat URL: http://www.mindat.org/loc-212944.html

Tectonic Settings:

Total number of sublocalities beneath "Coffee Creek, Coffee District (Coffee Creek District), Klamath Mts, Trinity Co., California, USA": 17
Total number of bottom-level sublocalities: 17

Number of Child Localities: 17
Child Localities:
Agnes May Placer Mine
Blagrove Mine
Clover Placer
Dewey Mine
Forget-Me-Not Mine
Fowler Placer
Jones Brothers Mine
Leona Placer
Log Cabin Group Placer
Mohawk Mine
Montgomery Placer Mine
Morrison Gulch Placer
New Blue Jay Mining Company Mine (Blue Jay)
Nonpareil Mine
Strode Mine (Oro Grande Mine; Oro Grunde; Twisted Oak Mine)
Trinity Development Company Placer
Unnamed Asbestos Occurrence (1)

Latitude: 41°4'49"N
Longitude: 122°43'28"W
Decimal Degree (lat, lon): 41.080277777778,-122.72444444444

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: Au C Ca Cu Fe H Mg O S Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleCalciteChalcopyriteClayCopperCorundumNonePyriteQuartzSerpentine

9 IMA Minerals at location:
Anthophyllite  (*)Calcite  (*)Chalcopyrite  (*)Chrysotile  (*)Gold  (*)
Hematite  (*)Pyrite  (*)Quartz  (*)Siderite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Anthophyllite  (*)Amphibole   Mg2Mg5Si8O22(OH)22181090,181100718
Calcite  (*)CalciteCa(CO3)2181087,18109827770
Chalcopyrite  (*)ChalcopyriteCuFeS22181087,18109627198
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)41181090951
Gold  (*)CopperAu11181084,181085,181087,181088,181091,181093,181094,181095,181096,181097,18109830554
Hematite  (*)CorundumFe2O3118108814640
Pyrite  (*)PyriteFeS22181087,18109839462
Quartz  (*)QuartzSiO27181085,181087,181088,181093,181096,181097,18109861156
Siderite  (*)CalciteFe(CO3)11810876417



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...