Ages for Spessartine at Grafton Co., New Hampshire, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 470Ma - 470Ma 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
  vms-01067	470	470			S	6134	Ore Hill Mine (Warren Silver-Lead Mine; Warren Zinc Mine), Warren, Grafton Co., New Hampshire, USA	Moiser et al. (2009)	USGSOFR2009_1034

• 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
  Alexandra-0181	326	294	Zircon			3942	Palermo No. 1 Mine (Palermo No. 1 Pegmatite; Hartford Mine; GE Mine), Groton, Grafton Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
  Alexandra-0411	339	319	Muscovite			6343	Fletcher Mine, Groton, Grafton Co., New Hampshire, USA	Zartman et al. (1970)	GSAB81_3359
  AREPS5_257-00007	194	194				234183	Cannon Mountain, Franconia, Grafton Co., New Hampshire, USA	Zartman (1977)	AREPS5_257
  USGS-Rb-Sr-00981	332.09	320.09	Muscovite			3281	Ruggles Mine, Grafton, Grafton Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
  USGS-Rb-Sr-00982	320.91	320.91				3281	Ruggles Mine, Grafton, Grafton Co., New Hampshire, USA	USGS-Rb-Sr	USGS-Rb-Sr
  USGS-U-Th-Pb-00254_207_206	160	0				3281	Ruggles Mine, Grafton, Grafton Co., New Hampshire, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  vms-01067	470	470			S	6134	Ore Hill Mine (Warren Silver-Lead Mine; Warren Zinc Mine), Warren, Grafton Co., New Hampshire, USA	Moiser et al. (2009)	USGSOFR2009_1034