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:
Lookout Mine (Hercules Group; Lookout Prospect; Upper Hercules Mine), Ramona, Ramona District, San Diego Co., California, USA


mindat Locality ID: 55904
mindat URL: http://www.mindat.org/loc-55904.html

Tectonic Settings:

Total number of sublocalities beneath "Lookout Mine (Hercules Group; Lookout Prospect; Upper Hercules Mine), Ramona, Ramona District, San Diego Co., California, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 33°3'37"N
Longitude: 116°47'27"W
Decimal Degree (lat, lon): 33.060277777778,-116.79083333333
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 Be Ca Fe H K Li Mg Mn Na O Sb Si Ta 

Elements from minerals reported directly at this locality: Al B Be Ca Fe H K Li Mg Mn Na O Sb Si Ta 

Structural Groups for minerals in this locality: 
BerylChloriteClayClinozoisiteEpidoteFeldsparGarnetKaoliniteMicaNone
QuartzSmectite-vermiculiteTourmaline

15 IMA Minerals at location:
Albite  (*)Almandine  (*)Beryl  (*)Clinozoisite  (*)Cookeite  (*)
Elbaite  (*)Kaolinite  (*)Microcline  (*)Montmorillonite  (*)Muscovite  (*)
Orthoclase  (*)Quartz  (*)Schorl  (*)Spessartine  (*)Stibiotantalite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)08803
Almandine  (*)GarnetFe2+3Al2(SiO4)302353
Beryl  (*)BerylBe3Al2Si6O1804286
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)01025
Cookeite  (*)Chlorite Clay(Al,Li)3Al2(Si,Al)4O10(OH)80181
Elbaite  (*)TourmalineNa(Al1.5Li1.5)Al6(Si6O18)(BO3)3(OH)3(OH)0520
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)405591
Microcline  (*)FeldsparK(AlSi3O8)04924
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O01508
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2017380
Orthoclase  (*)FeldsparK(AlSi3O8)02349
Quartz  (*)QuartzSiO2061156
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)02705
Spessartine  (*)GarnetMn2+3Al2(SiO4)301214
Stibiotantalite  (*)NoneSb3+TaO4053


No ages have been assigned to this locality yet.
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