Ages for Hedenbergite at Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 457Ma - 418Ma at this locality

• 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-00934	431.82	419.82				47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr
  USGS-Rb-Sr-00935	431.82	419.82				47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr
  USGS-U-Th-Pb-00150_206_238	426	418	Zircon			47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00150_207_206	457	445	Zircon			47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
  USGS-U-Th-Pb-00150_207_235	431	423	Zircon			47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb