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 Copper at Mass Fissure, Ahmeek Mine, Ahmeek, Keweenaw Co., Michigan, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 1060Ma - 1047Ma 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
Mo-00057	1060	1047		Kamiokite	Mo	3847	Keweenaw Co., Michigan, USA	Bornhorst et al. (1988)	EG83_619