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 Epidote at Westford, Middlesex Co., Massachusetts, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 427.32Ma - 285.32Ma 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
USGS-Rb-Sr-03298	427.32	285.32				220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr

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
USGS-Rb-Sr-03298	427.32	285.32				220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-03299	427.32	285.32				220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-U-Th-Pb-01362_206_238	360	352	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01362_207_206	391	385	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01362_207_235	364	356	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01363_206_238	368	360	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01363_207_206	391	385	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01363_207_235	371	363	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01364_206_238	361	353	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01364_207_206	395	387	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01364_207_235	366	358	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01365_206_238	354	346	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01365_207_206	394	386	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01365_207_235	360	352	Zircon			220591	Snake Meadow Hill, Westford, Middlesex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb