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 Montmorillonite at Florence, Florence District (Blackwater District; Black Rock District), Pinal Co., Arizona, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 62Ma - 62Ma 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
PorphCu-00112	62	62		Allophane, Azurite, Bornite, Brochantite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Covellite, Cuprite, Epidote, Galena, Magnetite, Molybdenite, Montmorillonite, Pyrite, Rutile, Shattuckite, Siderite, Sphalerite	Cu	52775	Poston Butte Deposit (Continental Oil Co. Property; Aztec Exploration And Development Co. Property; Florence Conoco; Florence Copper Co. Property), Florence, Florence District (Blackwater District; Black Rock District), Pinal Co., Arizona, USA	Singer et al. (2008)	USGSOFR2008_1155

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-00112	62	62		Allophane, Azurite, Bornite, Brochantite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Covellite, Cuprite, Epidote, Galena, Magnetite, Molybdenite, Montmorillonite, Pyrite, Rutile, Shattuckite, Siderite, Sphalerite	Cu	52775	Poston Butte Deposit (Continental Oil Co. Property; Aztec Exploration And Development Co. Property; Florence Conoco; Florence Copper Co. Property), Florence, Florence District (Blackwater District; Black Rock District), Pinal Co., Arizona, USA	Singer et al. (2008)	USGSOFR2008_1155

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_00000470	8.76	7.48				52775	Poston Butte Deposit (Continental Oil Co. Property; Aztec Exploration And Development Co. Property; Florence Conoco; Florence Copper Co. Property), Florence, Florence District (Blackwater District; Black Rock District), Pinal Co., Arizona, USA	Shafiqullah et al. (1980)	AGSD12_201