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 Hewettite at Calamity Mesa, Uravan District, Mesa Co., Colorado, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of Ma - Ma 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
Giersdorf_00000608	80	80	Coffinite	Coffinite		115884	Matchless Mine, Calamity Mesa, Uravan District, Mesa Co., Colorado, USA	Miller et al. (1963)	GSAB74_609
Giersdorf_00000609	96	96	Coffinite	Coffinite		115884	Matchless Mine, Calamity Mesa, Uravan District, Mesa Co., Colorado, USA	Miller et al. (1963)	GSAB74_609

Locality age (deprioritized)

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
Giersdorf_00000610	500	500	Coffinite	Coffinite		115884	Matchless Mine, Calamity Mesa, Uravan District, Mesa Co., Colorado, USA	Miller et al. (1963)	GSAB74_609