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 Muscovite at Spark Plug Nos 1-2 Prospect (Milner Creek; Colton Mine), Mount Barcroft, White Mts, Mono Co., California, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 157Ma - 136Ma at this locality

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
Giersdorf_00000284	157	153				3510	Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 And 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA	Hanson et al. (1987)	G15_1074
Giersdorf_00000285	138	136				3510	Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 And 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA	Hanson et al. (1987)	G15_1074