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 Fluorite at Ashio-machi, Nikko City, Tochigi, Japan

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 15.9Ma - 13.7Ma 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
Kristen001943	15.9	13.7				6800	Ashio Mine (Ashio Copper Mine), Ashio-machi, Nikko City, Tochigi, Japan	Shibata and Ishihara (1974)	EG69_1207

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
Kristen001943	15.9	13.7				6800	Ashio Mine (Ashio Copper Mine), Ashio-machi, Nikko City, Tochigi, Japan	Shibata and Ishihara (1974)	EG69_1207
Mo-00084	15.9	13.7		Koechlinite	Mo	6800	Ashio Mine (Ashio Copper Mine), Ashio-machi, Nikko City, Tochigi, Japan	Shibata and Ishihara (1974)	EG69_1207