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 Epsomite at Copper Hill Mine (Cosumnes Mine; Hobo Mine; Jackass Shaft), Four Corners, Amador 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

Mineralization 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-01027	170	170			S	73552	Copper Hill Mine (Cosumnes Mine; Hobo Mine; Jackass Shaft), Four Corners, Amador Co., California, USA	Moiser et al. (2009)	USGSOFR2009_1034