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:
Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry), Okehampton Hamlets, West Devon, Devon, England, UK

Oldest recorded age at locality: 308
Youngest recorded age at locality: 284

mindat Locality ID: 4571
mindat URL: http://www.mindat.org/loc-4571.html

Tectonic Settings:

Total number of sublocalities beneath "Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry), Okehampton Hamlets, West Devon, Devon, England, UK": 0
Total number of bottom-level sublocalities: 0

Latitude: 50°42'50"N
Longitude: 4°1'42"W
Decimal Degree (lat, lon): 50.713888888889,-4.0283333333333
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 As B Be Bi C Ca Cu F Fe H K Mg Mn Mo Na O P Pb S Si Ti W Zn 

Elements from minerals reported directly at this locality: Al As B Be Bi C Ca Cu F Fe H K Mg Mn Mo Na O P Pb S Si Ti W Zn 

Structural Groups for minerals in this locality: 
AluminiteAmphiboleApatiteArsenicArsenopyriteAxiniteBrookiteCalciteChalcopyriteChlorite
ClayDanburiteFeldsparFluoriteGadoliniteGarnetLöllingiteMolybdeniteNickelineNone
Not in a structural groupOlivinePrehnitePyritePyroxeneQuartzRhodoniteRocksaltScheeliteSmectite-vermiculite
SphaleriteStibniteTitaniteVesuvianiteWollastonite

42 IMA Minerals at location:
Actinolite  (*)Aluminite  (*)Anatase  (*)Andradite  (*)Arsenopyrite  (*)
Axinite-(Fe)  (*)Bavenite  (*)Bismuth  (*)Bismuthinite  (*)Brookite  (*)
Bustamite  (*)Calcite  (*)Chalcopyrite  (*)Chamosite  (*)Danburite  (*)
Datolite  (*)Diopside  (*)Ferro-actinolite  (*)Fluorapatite  (*)Fluorite  (*)
Galena  (*)Gibbsite  (*)Grossular  (*)Laumontite  (*)Löllingite  (*)
Molybdenite  (*)Montmorillonite  (*)Orthoclase  (*)Prehnite  (*)Pyrite  (*)
Pyrrhotite  (*)Quartz  (*)Rhodochrosite  (*)Rhodonite  (*)Scheelite  (*)
Siderite  (*)Spessartine  (*)Sphalerite  (*)Tephroite  (*)Titanite  (*)
Vesuvianite  (*)Wollastonite  (*)
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)230828403419
Aluminite  (*)AluminiteAl2(SO4)(OH)4·7H2O308284078
Anatase  (*)Not in a structural groupTiO230828402162
Andradite  (*)GarnetCa3Fe3+2(SiO4)330828401534
Arsenopyrite  (*)ArsenopyriteFeAsS30828409052
Axinite-(Fe)  (*)AxiniteCa4Fe2+2Al4[B2Si8O30](OH)23082840260
Bavenite  (*)NoneCa4Be2+xAl2-xSi9O26-x(OH)2+x (x = 0 to 1)3082840255
Bismuth  (*)ArsenicBi30828401966
Bismuthinite  (*)StibniteBi2S330828401935
Brookite  (*)BrookiteTiO23082840700
Bustamite  (*)WollastoniteMn2Ca2MnCa(Si3O9)23082840101
Calcite  (*)CalciteCa(CO3)308284027770
Chalcopyrite  (*)ChalcopyriteCuFeS2308284027198
Chamosite  (*)Chlorite Clay(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)83082840577
Danburite  (*)DanburiteCaB2Si2O83082840148
Datolite  (*)GadoliniteCaB(SiO4)(OH)3082840498
Diopside  (*)PyroxeneCaMgSi2O630828404135
Ferro-actinolite  (*)Amphibole   Ca2(Mg2.5-0.0Fe2+2.5-5.0)Si8O22(OH)23082840129
Fluorapatite  (*)ApatiteCa5(PO4)3F30828402740
Fluorite  (*)FluoriteCaF230828409617
Galena  (*)RocksaltPbS308284024243
Gibbsite  (*)NoneAl(OH)33082840504
Grossular  (*)GarnetCa3Al2(SiO4)330828401544
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O30828401271
Löllingite  (*)LöllingiteFeAs23082840762
Molybdenite  (*)MolybdeniteMoS230828405800
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O30828401508
Orthoclase  (*)FeldsparK(AlSi3O8)30828402349
Prehnite  (*)PrehniteCa2Al(Si3Al)O10(OH)230828401898
Pyrite  (*)PyriteFeS2308284039462
Pyrrhotite  (*)NickelineFe7S830828409056
Quartz  (*)QuartzSiO2308284061156
Rhodochrosite  (*)CalciteMn(CO3)30828401711
Rhodonite  (*)RhodoniteCaMn3Mn(Si5O15)3082840969
Scheelite  (*)ScheeliteCa(WO4)30828404894
Siderite  (*)CalciteFe(CO3)30828406417
Spessartine  (*)GarnetMn2+3Al2(SiO4)330828401214
Sphalerite  (*)SphaleriteZnS308284021482
Tephroite  (*)OlivineMn2+2(SiO4)3082840240
Titanite  (*)TitaniteCaTi(SiO4)O30828404899
Vesuvianite  (*)Vesuvianite(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)1030828401395
Wollastonite  (*)WollastoniteCaSiO330828401247


3 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
Lucy_082295295295K/ArAge of cotact metamorphism      4571Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry), Okehampton Hamlets, West Devon, Devon, England, UKMeldonHawkes et al. (1978 US4_51Age of contact metamorphism from intrusion of doloritic dyke and is equated to plutons in the area
Lucy_212308284296 ± 12K-ArLocality unknown      4571Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry), Okehampton Hamlets, West Devon, Devon, England, UKRailway Quarry (Meldon)Miller et al (1964)10.1002/gj.3350040109GJ4_105New ages for basic igneous rocks from south-west England.
Lucy_213301289295 ± 6K-ArLocality unknown      4571Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry), Okehampton Hamlets, West Devon, Devon, England, UKMeldonMiller et al (1964)10.1002/gj.3350040109GJ4_105New ages for basic igneous rocks from south-west England.

SampleSource LocalityReference URL

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