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 Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 22Ma - 16Ma 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
NAVDAT-10982	22	21				25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	NAVDAT	NAVDAT
PorphCu-00074	17	16		Arsenopyrite, Bornite, Chalcopyrite, Chrysocolla, Copper, Covellite, Epidote, Galena, Kaolinite, Magnetite, Molybdenite, Pyrite, Sphalerite	Cu	25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	Singer et al. (2008)	USGSOFR2008_1155

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
NAVDAT-10982	22	21				25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	NAVDAT	NAVDAT
NAVDAT-10983	22	21				25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	NAVDAT	NAVDAT
NAVDAT-10984	22	21				25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	NAVDAT	NAVDAT
NAVDAT-10985	22	21				25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	NAVDAT	NAVDAT
NAVDAT-14610	17.8	16.8				25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	NAVDAT	NAVDAT
NAVDAT-14611	17.4	16.4				25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	NAVDAT	NAVDAT
PorphCu-00074	17	16		Arsenopyrite, Bornite, Chalcopyrite, Chrysocolla, Copper, Covellite, Epidote, Galena, Kaolinite, Magnetite, Molybdenite, Pyrite, Sphalerite	Cu	25904	Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA	Singer et al. (2008)	USGSOFR2008_1155