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 Sphalerite at Johnson Co., Nebraska, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 323Ma - 323Ma 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
ree-00656	323	323				219396	Elk Creek Carbonatite, Elk Creek, Johnson Co., Nebraska, USA	Orris and Grauch (2002)	USGSOFR02_189

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
ree-00656	323	323				219396	Elk Creek Carbonatite, Elk Creek, Johnson Co., Nebraska, USA	Orris and Grauch (2002)	USGSOFR02_189