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 Boulder Group (Boulder Ridge Mining Company; Cobalt Gold Mines Inc.), Quartzburg District (Comer District), Grant Co., Oregon, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 206Ma - 65Ma 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
NAVDAT-10725	206	65				147729	Boulder Group (Boulder Ridge Mining Company; Cobalt Gold Mines Inc.), Quartzburg District (Comer District), Grant Co., Oregon, USA	NAVDAT	NAVDAT