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:
La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA

Oldest recorded age at locality: 650
Youngest recorded age at locality: 70

mindat Locality ID: 5934
mindat URL: http://www.mindat.org/loc-5934.html

Tectonic Settings:

Total number of sublocalities beneath "La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 38°39'1"N
Longitude: 109°2'14"W
Decimal Degree (lat, lon): 38.650277777778,-109.03722222222

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: Ca H O Si U V 

Elements from minerals reported directly at this locality: Ca H O Si U V 

Structural Groups for minerals in this locality: 
FluoriteNonePascoiteRamsdelliteZircon

5 IMA Minerals at location:
Coffinite  (*)Doloresite  (*)Paramontroseite  (*)Pascoite  (*)Uraninite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Coffinite  (*)ZirconU(SiO4)·nH2O110700566
Doloresite  (*)NoneV4+3O4(OH)411070023
Paramontroseite  (*)RamsdelliteVO211070039
Pascoite  (*)PascoiteCa3V5+10O28·17H2O11070078
Uraninite  (*)FluoriteUO21107002718



9 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
Giersdorf_00000611707070238U-206UAge is applied to the primary U minerals at this localitycoffiniteSS178  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609U238-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000612878787235U-207PbAge is applied to the primary U minerals at this localitycoffiniteSS178  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609U235-Pb207 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000613650650650207Pb-206PbThe Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methodslowcoffiniteSS178  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000614808080238U-206UAge is applied to the primary U minerals at this localitycoffiniteSS108  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609U238-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000615939393235U-207PbAge is applied to the primary U minerals at this localitycoffiniteSS108  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609U235-Pb207 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000616420420420207Pb-206PbThe Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methodslowcoffiniteSS108  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000617909090238U-206UAge is applied to the primary U minerals at this localitycoffiniteSS65  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609U238-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000618110110110235U-207PbAge is applied to the primary U minerals at this localitycoffiniteSS65  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609U235-Pb207 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine
Giersdorf_00000619500500500207Pb-206PbThe Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methodslowcoffiniteSS65  CoffiniteCoffinite, Uraninite 5934La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USALa Sal No. 2 MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the La Sal No. 2 Mine


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

All age data...

Other copyright data...