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 Branchville, Redding (Reading), Fairfield Co., Connecticut, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 369Ma - 366Ma 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
Alexandra-0319	369	366	Muscovite			6816	Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA	Spooner and Fairbairn (1970)	GSAB81_3663

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-0194	337.5	333.5	Muscovite			275695	Branchville, Redding (Reading), Fairfield Co., Connecticut, USA	Bradley et al. (2016)	CM54_945
Alexandra-0319	369	366	Muscovite			6816	Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA	Spooner and Fairbairn (1970)	GSAB81_3663

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-0318	367	363	Uraninite			6816	Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA	Spooner and Fairbairn (1970)	GSAB81_3663