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:
Goonhilly Downs, Mawgan-in-Meneage, Cornwall, England, UK


mindat Locality ID: 923
mindat URL: http://www.mindat.org/loc-923.html

Tectonic Settings:

Total number of sublocalities beneath "Goonhilly Downs, Mawgan-in-Meneage, Cornwall, England, UK": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Countybridge Quarry
Williams Stone Quarry (Trevassack Quarry)

Latitude: 50°3'14"N
Longitude: 5°11'26"W
Decimal Degree (lat, lon): 50.053888888889,-5.1905555555556
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 Ca Cu Fe H Mg Na O Si 

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

Structural Groups for minerals in this locality: 
AllophaneAmphiboleClayCopperNoneNot in a structural groupSerpentineSpinel

8 IMA Minerals at location:
Antigorite  (*)Chrysocolla  (*)Chrysotile  (*)Copper  (*)Cuprite  (*)
Hercynite  (*)Stevensite  (*)Tremolite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Antigorite  (*)Serpentine ClayMg3Si2O5(OH)41117973708
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O11179743531
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)41117973951
Copper  (*)CopperCu2117973,1179743846
Cuprite  (*)Not in a structural groupCu2O2117973,1179742970
Hercynite  (*)SpinelFe2+Al2O40407
Stevensite  (*)Clay(Ca,Na)xMg3-ySi4O10(OH)2111797457
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)202562


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

All locality data graciously provided by mindat.org

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