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 Chromite at Weir Mine, Holbrook, Baltimore Co., Maryland, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 510Ma - 470Ma at this locality

Mineralization 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
podchrome-00500	510	470			Cr	42105	Weir Mine, Holbrook, Baltimore Co., Maryland, USA	Moiser et al. (2012)	USGSSIR2012_5157