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 Opal at Itinga, Minas Gerais, Brazil

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 515Ma - 515Ma 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
Be-00050	515	515		Uralolite, Guimaraesite	Be	127216	Guimarãesite Occurrence, Piauí Valley, Taquaral, Itinga, Minas Gerais, Brazil	Pedrosa-Soares et al. (2011)	GSL350_25

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
Alexandra-0151	525	525				18406	Ponte Do Piauí Claim, Piauí Valley, Taquaral, Itinga, Minas Gerais, Brazil	Quéméneur and Lagache (1999)	RBG29_27
Be-00050	515	515		Uralolite, Guimaraesite	Be	127216	Guimarãesite Occurrence, Piauí Valley, Taquaral, Itinga, Minas Gerais, Brazil	Pedrosa-Soares et al. (2011)	GSL350_25
Scott-EPSL241_80-0001	12.8	12.6	Cryptomelane			24987	Cachoeira Mine, Piauí Valley, Taquaral, Itinga, Minas Gerais, Brazil	de Oliveira and Vasconcelos (2006)	EPSL241_80
Scott-EPSL241_80-0002	5.3	5.1	Cryptomelane			24987	Cachoeira Mine, Piauí Valley, Taquaral, Itinga, Minas Gerais, Brazil	de Oliveira and Vasconcelos (2006)	EPSL241_80
Scott-MD35_638-0001	699	619				245471	Murundu Mine, Jenipapo District, Itinga, Minas Gerais, Brazil	Morteani et al. (2000)	MD35_638