Ages for Siderite at Jefferson Co., Montana, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 82.44Ma - 62.44Ma 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
  USGS-Rb-Sr-02859	82.44	62.44				164311	Roosevelt Mine, Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA	USGS-Rb-Sr	USGS-Rb-Sr

• 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
  Giersdorf_00000882	60	5.3			U	166261	W. Wilson Mine (Liverpool Mine), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA	Becraft (1956)	EG51_362
  NAVDAT-76260	81.6	79.2				161264	Easter Lillie Mine (Ogle Mine), Pipestone Mining District, Jefferson Co., Montana, USA	NAVDAT	NAVDAT
  PorphCu-00680	38.93	34.55		Chalcopyrite, Molybdenite, Pyrite	Cu	208399	Beaverton Cu Deposit, Alahambra Mining District (Golconda Mining District), Jefferson Co., Montana, USA	Singer et al. (2008)	USGSOFR2008_1155
  USGS-Rb-Sr-02859	82.44	62.44				164311	Roosevelt Mine, Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA	USGS-Rb-Sr	USGS-Rb-Sr
  USGS-U-Th-Pb-00942_206_238	50	50				161573	G. Washington Mine (Member Of Presidents Group), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00942_207_206	135	135				161573	G. Washington Mine (Member Of Presidents Group), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00942_207_235	55	55				161573	G. Washington Mine (Member Of Presidents Group), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA	USGS-U-Th-Pb	USGS-U-Th-Pb