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 Muscovite at Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 338Ma - 265.9Ma at this locality

Direct 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-0190	272.1	265.9	Muscovite			6000	Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
Alexandra-0410	338	318	Muscovite			6000	Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA	Zartman et al. (1970)	GSAB81_3359

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-0189	341.82	340.66	Zircon			6000	Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA	Bradley et al. (2016)	CM54_945
Bradley_2012_068	342	340	Zircon			6000	Beryl Mountain Quarry (Beryl Mountain Pegmatites; Beryl Hill; William's Ledge), South Acworth, Sullivan Co., New Hampshire, USA	McCauley and Bradley (2014)	CM52_183