Ages for Nosean at Spearfish Peak (Black Butte), 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

• 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