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 Aegirine at Blackburn Circle Locality, Gloucester, Essex Co., Massachusetts, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 364.15Ma - 350.45Ma 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-01308	350.45	350.45				206529	Blackburn Circle Locality, Gloucester, Essex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-01309	364.15	364.15				206529	Blackburn Circle Locality, Gloucester, Essex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr