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:
Keolu Hills, Kailua, Oahu, Honolulu Co., Hawaii, USA


mindat Locality ID: 217131
mindat URL: http://www.mindat.org/loc-217131.html

Tectonic Settings:

Total number of sublocalities beneath "Keolu Hills, Kailua, Oahu, Honolulu Co., Hawaii, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 21°22'45"N
Longitude: 157°43'54"W
Decimal Degree (lat, lon): 21.379166666667,-157.73166666667
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 C Ca Fe H K Mg Na O Si Ti 

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

Structural Groups for minerals in this locality: 
AmorphousAragoniteCalciteChabaziteClayCorundumCristobaliteHeulanditeKaoliniteMordenite
NoneNot in a structural groupPyroxeneQuartzSmectite-vermiculite

18 IMA Minerals at location:
Aragonite  (*)Augite  (*)Calcite  (*)Chabazite-Ca  (*)Cristobalite  (*)
Epistilbite  (*)Hematite  (*)Heulandite-Ca  (*)Ilmenite  (*)Kaolinite  (*)
Laumontite  (*)Montmorillonite  (*)Mordenite  (*)Nontronite  (*)Opal  (*)
Quartz  (*)Siderite  (*)Vermiculite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Aragonite  (*)AragoniteCa(CO3)03250
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O602060
Calcite  (*)CalciteCa(CO3)027770
Chabazite-Ca  (*)ChabaziteCa2[Al4Si8O24]·13H2O0310
Cristobalite  (*)CristobaliteSiO20453
Epistilbite  (*)MordeniteCa3[Si18Al6O48]·16H2O0138
Hematite  (*)CorundumFe2O3014640
Heulandite-Ca  (*)Heulandite(Ca,Na,K)5(Si27Al9)O72·26H2O0246
Ilmenite  (*)CorundumFe2+Ti4+O305433
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)405591
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O01271
Montmorillonite  (*)Clay Smectite-vermiculite(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O01508
Mordenite  (*)Mordenite(Na2,Ca,K2)4(Al8Si40)O96·28H2O0405
Nontronite  (*)Clay Smectite-vermiculiteNa0.3Fe3+2(Si,Al)4O10(OH)2·nH2O0471
Opal  (*)AmorphousSiO2·nH2O02994
Quartz  (*)QuartzSiO2061156
Siderite  (*)CalciteFe(CO3)06417
Vermiculite  (*)Clay Smectite-vermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4·8H2O0652


No ages have been assigned to this locality yet.
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