Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org

Ages for Zircon at Hidden Reserve Claim Group, Marshall Pass District, Saguache Co., Colorado, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 203Ma - 94Ma at this locality

Locality age (remote)

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
Giersdorf_00000794	94	94	Uraninite	Autunite, Boltwoodite, Chalcocite, Chalcopyrite, Covellite, Galena, Ianthinite, Marcasite, Metazeunerite, Pyrite, Schoepite, Soddyite, Sphalerite, Uraninite, Zeunerite	U	30136	Lookout No. 22 Claim, Marshall Pass District, Saguache Co., Colorado, USA	Gross (1965)	AM50_909
Giersdorf_00000795	99	99	Uraninite	Autunite, Boltwoodite, Chalcocite, Chalcopyrite, Covellite, Galena, Ianthinite, Marcasite, Metazeunerite, Pyrite, Schoepite, Soddyite, Sphalerite, Uraninite, Zeunerite	U	30136	Lookout No. 22 Claim, Marshall Pass District, Saguache Co., Colorado, USA	Gross (1965)	AM50_909
Giersdorf_00000796	203	203	Uraninite	Autunite, Boltwoodite, Chalcocite, Chalcopyrite, Covellite, Galena, Ianthinite, Marcasite, Metazeunerite, Pyrite, Schoepite, Soddyite, Sphalerite, Uraninite, Zeunerite	U	30136	Lookout No. 22 Claim, Marshall Pass District, Saguache Co., Colorado, USA	Gross (1965)	AM50_909