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 Uraninite at Groveland Mine, Randville, 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 1977.38Ma - 1677.02Ma 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
USGS-Rb-Sr-00914	1977.38	1977.38	Muscovite			11628	Groveland Mine, Randville, Menominee Iron Range, Dickinson Co., Michigan, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00958	1677.02	1677.02				11628	Groveland Mine, Randville, Menominee Iron Range, Dickinson Co., Michigan, USA	USGS-Rb-Sr	USGS-Rb-Sr