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 Quartz at Keystone-Union Mine (Calaveras Copper), Copperopolis Mines (Copperopolis Group), Copperopolis, Foothill Copper Belt, Calaveras Co., California, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 170Ma - 170Ma at this locality

Locality age

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
vms-01034	170	170			S	75449	Keystone-Union Mine (Calaveras Copper), Copperopolis Mines (Copperopolis Group), Copperopolis, Foothill Copper Belt, Calaveras Co., California, USA	Moiser et al. (2009)	USGSOFR2009_1034

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
Mo-00156	100	100		Molybdenite	Mo	16293	Calaveras Co., California, USA	Brock (1972)	GSAB83_3391