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 Quartz at Julian District, San Diego Co., California, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 167Ma - 163Ma 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
NAVDAT-44512	167	163				11243	Friday Mine, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT

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
NAVDAT-126294	118	116				91519	Pioneer Group, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT
NAVDAT-44503	187	151	Zircon			91167	Butte Prospect, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT
NAVDAT-44507	167	163				91438	Maude E. Claim, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT
NAVDAT-44509	167	163				91438	Maude E. Claim, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT
NAVDAT-44512	167	163				11243	Friday Mine, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT