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 Birnessite at Nordmarka, Oslo, Norway

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 259Ma - 259Ma 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
Michelle_723	259	259	Zircon			132016	Nordmarka, Oslo, Norway	Neumann (1960)	NGT40_173

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
Michelle_723	259	259	Zircon			132016	Nordmarka, Oslo, Norway	Neumann (1960)	NGT40_173