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 Kaolinite at Allard Tunnel Occurrence (Audrey Nos. 1-2; Protection; Ruby Nos. 1-95; Shorty Nos. 1-4; Jane Nos. 1-4; Minnie), La Plata District (California District), La Plata Co., Colorado, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 70Ma - 65Ma at this locality

Specified 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
PorphCu-00139	70	65		Arsenopyrite, Bornite, Calcite, Chalcocite, Chalcopyrite, Enargite, Fluorite, Galena, Hematite, Kaolinite, Magnetite, Marcasite, Pyrite, Sphalerite, Domeykite	Cu	114858	Allard Tunnel Occurrence (Audrey Nos. 1-2; Protection; Ruby Nos. 1-95; Shorty Nos. 1-4; Jane Nos. 1-4; Minnie), La Plata District (California District), La Plata Co., Colorado, USA	Singer et al. (2008)	USGSOFR2008_1155