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 Pyrolusite at Chaffee Co., Colorado, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 1610Ma - 31.7Ma 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
Bradley_2012_029	1610	1570				3600	Trout Creek Pass Pegmatite District, Chaffee Co., Colorado, USA	McCauley and Bradley (2014)	CM52_183
NAVDAT-35680	41.7	31.7				110791	Last Chance Mine (Lower Adit; Kramer Mine; Adit No. 1; Adit No. 2), Browns Canyon District, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT

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
Bradley_2012_029	1610	1570				3600	Trout Creek Pass Pegmatite District, Chaffee Co., Colorado, USA	McCauley and Bradley (2014)	CM52_183
NAVDAT-19685	39	29				110823	Middle Mountain Prospect, La Plata District (Winfield District), Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-19687	45	35				110794	Lehigh, Monarch District, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-35547	35	25				134249	Bald Mountain, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-35549	39	29				134325	Buffalo Peaks, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-35558	41	31				214497	Little Orphan Annie Mine, Monarch District, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-35627	15	5				110817	Marvel Occurrence, Cleora District, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-35653	77	67				5572	Calumet Mine (Calumet; Calumet No. 2; Hecla; Hecla No. 2; Calumet Iron Mine; Calumet-Hecla-Smithville Magnetite Deposit; Patented Placer Claims: Calumet; Hecla-Williamson; Smithville No. 2; CF&I Company Mine), Turret District, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-35680	41.7	31.7				110791	Last Chance Mine (Lower Adit; Kramer Mine; Adit No. 1; Adit No. 2), Browns Canyon District, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-35681	42	32				110791	Last Chance Mine (Lower Adit; Kramer Mine; Adit No. 1; Adit No. 2), Browns Canyon District, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-36554	40	26				3597	Mt Antero, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-67173	36.3	29.7				122702	Mount Princeton, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-67174	36.3	29.7				122702	Mount Princeton, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-67175	36.3	29.7				122702	Mount Princeton, Chaffee Co., Colorado, USA	NAVDAT	NAVDAT