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 Tremolite at Metropolitan, Menominee Iron Range, Dickinson Co., Michigan, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 1703.29Ma - 1507.51Ma at this locality

Age range from children

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
USGS-Rb-Sr-00913	1703.29	1703.29	Muscovite			16267	Metropolitan Mine, Metropolitan, Menominee Iron Range, Dickinson Co., Michigan, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00915	1507.51	1507.51				16267	Metropolitan Mine, Metropolitan, Menominee Iron Range, Dickinson Co., Michigan, USA	USGS-Rb-Sr	USGS-Rb-Sr

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
USGS-Rb-Sr-00912	1556.45	1556.45				16267	Metropolitan Mine, Metropolitan, Menominee Iron Range, Dickinson Co., Michigan, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00913	1703.29	1703.29	Muscovite			16267	Metropolitan Mine, Metropolitan, Menominee Iron Range, Dickinson Co., Michigan, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00915	1507.51	1507.51				16267	Metropolitan Mine, Metropolitan, Menominee Iron Range, Dickinson Co., Michigan, USA	USGS-Rb-Sr	USGS-Rb-Sr