Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org

Ages for Sillimanite at Jaffrey, Cheshire Co., New Hampshire, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 171Ma - 171Ma 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
AREPS5_257-00035	171	171				9393	Monadnock Mountain (Mount Monadnock), Jaffrey, Cheshire Co., New Hampshire, USA	Zartman (1977)	AREPS5_257

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
AREPS5_257-00035	171	171				9393	Monadnock Mountain (Mount Monadnock), Jaffrey, Cheshire Co., New Hampshire, USA	Zartman (1977)	AREPS5_257

Locality age (remote)

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
AREPS5_257-00014	171	171				220659	Monadnock Mountain (Mount Monadnock), Lemington, Essex Co., Vermont, USA	Zartman (1977)	AREPS5_257