Ages for Dumortierite at North-West District, Botswana

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
  Michelle_823	2.5	0				5807	Gcwihaba Cave (Drotsky's Caverns), Ngamiland West District, North-West District, Botswana	Pickford (1990)	BNR22_1
  Michelle_824	1000	541				5807	Gcwihaba Cave (Drotsky's Caverns), Ngamiland West District, North-West District, Botswana	Railsback et al. (1999)	PG20_331
  sedcu-00064	900	900			Cu	228259	Ngwako Pan, Ngamiland East District, North-West District, Botswana	Cox et al. (2003)	USGSOFR03_107