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 Goethite at Harford Co., Maryland, USA

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

Locality age

Excel ID	Max Age (Ma)	Min Age (Ma)	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
podchrome-00407	490	490	Cr	142724	Ayres Mine, Jarretsville-Dublin District, Harford Co., Maryland, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00497	510	470	Cr	143059	Reed Mine, Jarretsville-Dublin District, Harford Co., Maryland, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00502	510	470	Cr	142771	Cherry Hill Mine, Jarretsville-Dublin District, Harford Co., Maryland, USA	Moiser et al. (2012)	USGSSIR2012_5157