Ages for Montmorillonite at Malheur Co., Oregon, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 11.6Ma - 5.3Ma 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
  Michelle_801	11.6	5.3		Clinoptilolite-Ca, Clinoptilolite-K, Opal, Quartz		19979	Succor Creek, Malheur Co., Oregon, USA	Altaner and Grim (1990)	CCM38_561

• 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
  Michelle_789	17.86	15.68				147581	Birch Creek Prospect, Malheur Co., Oregon, USA	Benson and Mahood (2016)	JVGR309_96
  Michelle_790	15.89	15.79				149944	Leslie Gulch, Malheur Co., Oregon, USA	Benson and Mahood (2016)	JVGR309_96
  Michelle_796	15.78	15.66	Sanidine			151923	Three Fingers Peak, Malheur Co., Oregon, USA	Benson and Mahood (2016)	JVGR309_96
  Michelle_797	16.15	15.59	Sanidine			149944	Leslie Gulch, Malheur Co., Oregon, USA	Benson and Mahood (2016)	JVGR309_96
  Michelle_801	11.6	5.3		Clinoptilolite-Ca, Clinoptilolite-K, Opal, Quartz		19979	Succor Creek, Malheur Co., Oregon, USA	Altaner and Grim (1990)	CCM38_561
  NAVDAT-10053	9.09	8.25				150127	Lucky G Prospect, Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-16707	16.4	11.2				148132	CKE Group (Bishop Ranch Quarry), Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-18783	16.4	11.2				151274	Rice-Bacon Tuff, Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-19781	16.4	11.2				282903	Sheaville, Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-48444	14.26	13.48				150509	MP 8.9 I.O.N. Highway, Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-48445	12.85	11.89				150475	MP 21.9 I.O.N. Highway, Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-66270	11.2	5.3				152271	Unknown Uranium Occurrence (MRDS - 10036984), Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-66283	23.8	5.3				149282	Grassy Mountain Mine (Musgrove Creek; Grassy Mtn Property), Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-66284	23.8	5.3				149282	Grassy Mountain Mine (Musgrove Creek; Grassy Mtn Property), Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-66436	11.2	5.3				152937	Unnamed Stone - Crushed/Broken Pit (MRDS - 10281197), Malheur Co., Oregon, USA	NAVDAT	NAVDAT
  NAVDAT-8951	15.08	13.68				152501	Unnamed Gold Prospect (MRDS - 10274146), Malheur Co., Oregon, USA	NAVDAT	NAVDAT