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 Nosean at Spearfish, Lawrence Co., South Dakota, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 60Ma - 39Ma at this locality

Age range from children

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-16731	60	39				45297	Spearfish Peak (Black Butte), Spearfish, Lawrence Co., South Dakota, USA	NAVDAT	NAVDAT

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-16731	60	39				45297	Spearfish Peak (Black Butte), Spearfish, Lawrence Co., South Dakota, USA	NAVDAT	NAVDAT
NAVDAT-4767	55	40				45297	Spearfish Peak (Black Butte), Spearfish, Lawrence Co., South Dakota, USA	NAVDAT	NAVDAT
NAVDAT-4768	55	40				45297	Spearfish Peak (Black Butte), Spearfish, Lawrence Co., South Dakota, USA	NAVDAT	NAVDAT
NAVDAT-92342	58	46				45297	Spearfish Peak (Black Butte), Spearfish, Lawrence Co., South Dakota, USA	NAVDAT	NAVDAT