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 Magnesiochromite at Holbrook And McGuire Mine (Low Grade Workings; High Grade Workings; Holbrook And McGuire Group), Mountain Top, French Creek District, Calaveras Co., California, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 281Ma - 281Ma at this locality

Mineralization 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
podchrome-00061	281	281			Cr	75365	Holbrook And McGuire Mine (Low Grade Workings; High Grade Workings; Holbrook And McGuire Group), Mountain Top, French Creek District, Calaveras Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00062	281	281			Cr	75365	Holbrook And McGuire Mine (Low Grade Workings; High Grade Workings; Holbrook And McGuire Group), Mountain Top, French Creek District, Calaveras Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157

Locality age (remote)

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
Mo-00156	100	100		Molybdenite	Mo	16293	Calaveras Co., California, USA	Brock (1972)	GSAB83_3391