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:
Lakeside, San Diego Co., California, USA

Oldest recorded age at locality: 110
Youngest recorded age at locality: 105

mindat Locality ID: 217406
mindat URL: http://www.mindat.org/loc-217406.html

Tectonic Settings:

Total number of sublocalities beneath "Lakeside, San Diego Co., California, USA": 23
Total number of bottom-level sublocalities: 23

Number of Child Localities: 23
Child Localities:
Atchison Quarry
California Wire Sawyer Corporation Quarry
Cameron-Deering Quarries Mine (Simpson-Pirnie; Matson And Cameron; A. E. Babcock)
Coston Construction Company Mine
Echo Mine
El Cajon Kaolin Deposit
El Capitan Quarry
Featherstone Deposit
Fernbrook (Woolsey)
Foster Quarry (Lakeside-Foster Quarry)
Hoover Mine (Hoover Deposit; Hoover Lakeside Mine; Tunner Mine)
Ireys Black Granite Deposit
Iron Master Prospect (Cornellius; El Cajon)
Lakeside Lime And Marl Deposit
Lakeview Deposit
Lehnberg Quarry (Foster Quarry; Lehnberg Deposit; Foster Quarry; Meyer Quarry)
Merrick Kaolin Deposit
Meyer Granite Quarries
National Quarries Mine (Johnson Brothers Quarries)
San Diego Quarry (Raymond Granite Company Quarry)
Southern California Granite Company Quarry (Rossi Quarry)
TTT Quarry (Mine No. 1)
Unnamed Quarry

Latitude: 32°53'30"N
Longitude: 116°54'22"W
Decimal Degree (lat, lon): 32.891666666667,-116.90611111111
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 K Mg Mo O S Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ChalcopyriteClayClinozoisiteCopiapiteCorundumDiasporeEpidoteHalotrichiteKaoliniteMica
MolybdeniteNickelineNonePyriteSpinelStarkeyite

15 IMA Minerals at location:
Aluminocopiapite  (*)Chalcopyrite  (*)Epidote  (*)Ferrimolybdite  (*)Goethite  (*)
Halotrichite  (*)Hematite  (*)Kaolinite  (*)Magnetite  (*)Molybdenite  (*)
Muscovite  (*)Pyrite  (*)Pyrrhotite  (*)Rozenite  (*)Spinel  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Aluminocopiapite  (*)Copiapite(Al,Mg)Fe3+4(SO4)6(OH,O)2·20H2O117477250
Chalcopyrite  (*)ChalcopyriteCuFeS2117477227198
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)11747728173
Ferrimolybdite  (*)NoneFe3+2(Mo6+O4)3·7H2O1174772345
Goethite  (*)DiasporeFeO(OH)11747727437
Halotrichite  (*)HalotrichiteFe2+Al2(SO4)4·22H2O1174772409
Hematite  (*)CorundumFe2O3117478014640
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)42174771,1747825591
Magnetite  (*)SpinelFe2+Fe3+2O41101063174772,174778,17478014899
Molybdenite  (*)MolybdeniteMoS23174770,174772,1747745800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2117477217380
Pyrite  (*)PyriteFeS2117477239462
Pyrrhotite  (*)NickelineFe7S82174770,1747729056
Rozenite  (*)StarkeyiteFe2+(SO4)·4H2O1174772293
Spinel  (*)SpinelMgAl2O411747721934


5 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
NAVDAT-126280109105107±2   126280    91275Featherstone Deposit, Lakeside, San Diego Co., California, USA NAVDAT NAVDAT 
NAVDAT-126204109105107±2   126204    91357Hoover Mine (Hoover Deposit; Hoover Lakeside Mine; Tunner Mine), Lakeside, San Diego Co., California, USA NAVDAT NAVDAT 
NAVDAT-126213109105107±2   126213    91357Hoover Mine (Hoover Deposit; Hoover Lakeside Mine; Tunner Mine), Lakeside, San Diego Co., California, USA NAVDAT NAVDAT 
NAVDAT-126214109105107±2   126214    91357Hoover Mine (Hoover Deposit; Hoover Lakeside Mine; Tunner Mine), Lakeside, San Diego Co., California, USA NAVDAT NAVDAT 
NAVDAT-126252110106108±2   126252    91365Iron Master Prospect (Cornellius; El Cajon), Lakeside, San Diego Co., California, USA NAVDAT NAVDAT 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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