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:
Well G.75, Searles Lake, San Bernardino Co., California, USA

Oldest recorded age at locality: 0.032
Youngest recorded age at locality: 0.0245

mindat Locality ID: 220705
mindat URL: http://www.mindat.org/loc-220705.html

Tectonic Settings:

Total number of sublocalities beneath "Well G.75, Searles Lake, San Bernardino Co., California, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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: B C Cl H K Na O S 

Elements from minerals reported directly at this locality: B C Cl H K Na O S 

Structural Groups for minerals in this locality: 
AphthitaliteNoneRocksalt

6 IMA Minerals at location:
Aphthitalite  (*)Borax  (*)Burkeite  (*)Halite  (*)Hanksite  (*)
Trona  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Aphthitalite  (*)AphthitaliteK3Na(SO4)20.0320.0245077
Borax  (*)NoneNa2B4O5(OH)4·8H2O0.0320.0245076
Burkeite  (*)NoneNa4(SO4)(CO3)0.0320.0245047
Halite  (*)RocksaltNaCl0.0320.024501398
Hanksite  (*)NoneKNa22(SO4)9(CO3)2Cl0.0320.0245012
Trona  (*)NoneNa3(HCO3)(CO3)·2H2O0.0320.02450129



Locality Notes from all Ages at Locality:
Age IDLocality Notes
Michelle_0060Searles Lake is an endorheic dry lake mined for industrial minerals.


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
Michelle_00600.0320.02450.032-0.024514C, 230THAge of upper salt      220705Well G.75, Searles Lake, San Bernardino Co., California, USASearles LakePeng et al. (1978)10.1016/0033-5894(78)90036-4QR9_319Age of upper salt formation containing hanksite. Hanksite is more common in the 10.5-6 kya lower salt formation.


SampleSource LocalityReference URL


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