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:
Ramona District, San Diego Co., California, USA

Oldest recorded age at locality: 99
Youngest recorded age at locality: 95

mindat Locality ID: 20939
mindat URL: http://www.mindat.org/loc-20939.html

Tectonic Settings:

Total number of sublocalities beneath "Ramona District, San Diego Co., California, USA": 27
Total number of bottom-level sublocalities: 26

Number of Child Localities: 1
Child Localities:
Ramona

Latitude: 33°3'21"N
Longitude: 116°48'43"W
Decimal Degree (lat, lon): 33.055833333333,-116.81194444444
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 B Ba Be Bi C Ca Cs Cu F Fe H K Li Mg Mn Mo Na Nb O P Pb S Sb Si Sn Sr Ta V Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AnalcimeApatiteAragoniteArsenicAxiniteBerylBismutiteChalcopyriteChloriteClay
ClinozoisiteColumbiteDanburiteDiasporeEpidoteFeldsparGarnetKaoliniteMalachiteMica
MolybdeniteNoneNot in a structural groupPerovskitePyriteQuartzRutileScheeliteSmectite-vermiculiteSpinel
StibniteStilbiteTalcTopazTourmalineTripliteZircon

52 IMA Minerals at location:
Albite  (*)Almandine  (*)Axinite-(Mn)  (*)Azurite  (*)Beryl  (*)
Beyerite  (*)Bismite  (*)Bismuth  (*)Bismuthinite  (*)Bismutite  (*)
Boromuscovite  (*)Cassiterite  (*)Cerussite  (*)Chalcopyrite  (*)Clinozoisite  (*)
Columbite-(Fe)  (*)Columbite-(Mn)  (*)Cookeite  (*)Cryolite  (*)Danburite  (*)
Elbaite  (*)Epidote  (*)Fluorapatite  (*)Foitite  (*)Goethite  (*)
Hambergite  (*)Kaolinite  (*)Laumontite  (*)Magnetite  (*)Malachite  (*)
Microcline  (*)Molybdenite  (*)Montmorillonite  (*)Muscovite  (*)Orthoclase  (*)
Pollucite  (*)Pucherite  (*)Pyrite  (*)Quartz  (*)Schorl  (*)
Sillimanite  (*)Spessartine  (*)Stibiocolumbite  (*)Stibiotantalite  (*)Stilbite-Ca  (*)
Talc  (*)Tenorite  (*)Todorokite  (*)Topaz  (*)Triplite  (*)
Vermiculite  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)999511174993,174994,174997,174999,175003,175005,175006,175007,175011,175014,1750158803
Almandine  (*)GarnetFe2+3Al2(SiO4)399955174994,174997,174999,175005,1750072353
Axinite-(Mn)  (*)AxiniteCa4Mn2+2Al4[B2Si8O30](OH)299952175003,17500588
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)211749985509
Beryl  (*)BerylBe3Al2Si6O1899958174993,174996,175003,175005,175006,175007,175014,1750154286
Beyerite  (*)BismutiteCaBi2O2(CO3)29995117500596
Bismite  (*)NoneBi2O399951175005214
Bismuth  (*)ArsenicBi999511750051966
Bismuthinite  (*)StibniteBi2S311750031935
Bismutite  (*)BismutiteBi2O2(CO3)99951175005716
Boromuscovite  (*)MicaKAl2(Si3B)O10(OH)2999511750055
Cassiterite  (*)RutileSnO299952175005,1750175171
Cerussite  (*)AragonitePb(CO3)999511750054979
Chalcopyrite  (*)ChalcopyriteCuFeS2117499827198
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)99953175003,175005,1750071025
Columbite-(Fe)  (*)ColumbiteFe2+Nb2O699952175003,175005518
Columbite-(Mn)  (*)ColumbiteMn2+Nb2O699952175003,175005289
Cookeite  (*)Chlorite Clay(Al,Li)3Al2(Si,Al)4O10(OH)899954174996,175003,175005,175007181
Cryolite  (*)PerovskiteNa2NaAlF69995117500550
Danburite  (*)DanburiteCaB2Si2O899952175005,175006148
Elbaite  (*)TourmalineNa(Al1.5Li1.5)Al6(Si6O18)(BO3)3(OH)3(OH)99956174996,175003,175005,175006,175007,175015520
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)99952175003,1750058173
Fluorapatite  (*)ApatiteCa5(PO4)3F99952175003,1750052740
Foitite  (*)Tourmaline   (Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH)9995117500575
Goethite  (*)DiasporeFeO(OH)99953175003,175005,1750157437
Hambergite  (*)NoneBe2(BO3)(OH)9995117500581
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)499955174993,174997,175003,175005,1750075591
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O99952175003,1750051271
Magnetite  (*)SpinelFe2+Fe3+2O4117501514899
Malachite  (*)MalachiteCu2(CO3)(OH)2117499812537
Microcline  (*)FeldsparK(AlSi3O8)99955174994,175003,175005,175007,1750114924
Molybdenite  (*)MolybdeniteMoS211750185800
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O99954174993,175003,175005,1750071508
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)299959174993,174994,174997,174999,175003,175005,175007,175011,17501517380
Orthoclase  (*)FeldsparK(AlSi3O8)99959174993,174994,174997,174999,175003,175005,175007,175011,1750152349
Pollucite  (*)AnalcimeCs(Si2Al)O6·nH2O99951175005140
Pucherite  (*)ScheeliteBi(VO4)9995117500553
Pyrite  (*)PyriteFeS2117499839462
Quartz  (*)QuartzSiO2999511174993,174994,174996,174997,174999,175003,175005,175007,175011,175014,17501561156
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)999511174993,174994,174997,174999,175003,175005,175006,175007,175011,175014,1750152705
Sillimanite  (*)Not in a structural groupAl2SiO511750131516
Spessartine  (*)GarnetMn2+3Al2(SiO4)3999511174993,174994,174996,174997,174999,175003,175005,175006,175007,175011,1750151214
Stibiocolumbite  (*)NoneSbNbO49995117500513
Stibiotantalite  (*)NoneSb3+TaO499953174996,175005,17500753
Stilbite-Ca  (*)StilbiteNaCa4(Si27Al9)O72·28H2O99951175005268
Talc  (*)Clay TalcMg3Si4O10(OH)211749933337
Tenorite  (*)NoneCuO11749981101
Todorokite  (*)None(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12·3-4H2O99951175005433
Topaz  (*)TopazAl2SiO4F299955174996,175003,175005,175006,1750151476
Triplite  (*)TripliteMn2+2(PO4)F1175015233
Vermiculite  (*)Clay Smectite-vermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4·8H2O99952175003,175005652
Zircon  (*)ZirconZr(SiO4)999511750055251


1 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
Bradley_2012_014999597±2Ar/Ar muscovite   Muscovite  3561Little Three Mine (Little 3 Mine), Ramona, Ramona District, San Diego Co., California, USALittle Three MineMcCauley and Bradley (2014)10.3749/canmin.52.2.183CM52_183 

SampleSource LocalityReference URL
X050149Ramona, Ramona District, San Diego Co., California, USAhttps://rruff.info/X050149
R070107Little Three Mine (Little 3 Mine), Ramona, Ramona District, San Diego Co., California, USAhttps://rruff.info/R070107

All locality data graciously provided by mindat.org

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