Ages for Leucite at Chouteau Co., Montana, 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)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
  NAVDAT-29739	56.6	48.4				164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA	NAVDAT	NAVDAT
  NAVDAT-29741	56.6	48.4				164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA	NAVDAT	NAVDAT
  NAVDAT-29744	56.6	48.4				164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA	NAVDAT	NAVDAT
  NAVDAT-29745	56.6	48.4				163730	Number One Prospect, Chouteau Co., Montana, USA	NAVDAT	NAVDAT
  NAVDAT-29746	56.6	48.4				164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA	NAVDAT	NAVDAT
  NAVDAT-30339	54	42				164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA	NAVDAT	NAVDAT
  NAVDAT-30340	54	42				164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA	NAVDAT	NAVDAT
  ree-00654	55	49				164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA	Orris and Grauch (2002)	USGSOFR02_189