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 Magnetite at Patapsco Mine (Finksburg Mine; Orchard Mine), Patapsco Mines, Finksburg, Sykesville, Carroll Co., Maryland, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 540Ma - 444Ma at this locality

Locality age (remote)

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
Emily000556	540	444				24179	Sykesville, Carroll Co., Maryland, USA	Rast and Horton (1989)	GSA288_1
Emily000557	488	470	Zircon	Zircon		24179	Sykesville, Carroll Co., Maryland, USA	Horton et al. (2010)	GSA206_621