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 Magnesiochromite at Tuolumne Co., California, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 281Ma - 199Ma 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
podchrome-00089	281	281			Cr	98077	Perconi Ranch Deposits (Perconi Ranch Mine; Cherry Creek Mine; Whittle Property), Chinese Station, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00088	199	199			Cr	97686	Don Pedro Mine (Booker Lease; Rosasco Mine), Hetch Hetchy Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157

Mineralization 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
podchrome-00084	200	200			Cr	98110	Quigg Mine (Kahl Mine [1908]), Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00085	200	200			Cr	97936	Mackey Mine, Stent, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00086	281	281			Cr	97517	Ace Of Spades Mine (Redfox Claim), Moccasin Peak Area, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00087	281	281			Cr	97527	Mum And Alice June Mine (Alice June Claim; Mum Claim; Mum Extension Claim; Alice June Extension Claim; Bud's Mine), Marsh Flats Chrome Associates Properties, Moccasin Peak Area, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00088	199	199			Cr	97686	Don Pedro Mine (Booker Lease; Rosasco Mine), Hetch Hetchy Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00089	281	281			Cr	98077	Perconi Ranch Deposits (Perconi Ranch Mine; Cherry Creek Mine; Whittle Property), Chinese Station, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00090	281	281			Cr	98199	Sims Property (Sims Mine), Chinese Station, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00091	281	281			Cr	97966	McCormick Mine (McCormick Property; Terry And Sell Lease [WWI]), Yosemite Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00092	281	281			Cr	97966	McCormick Mine (McCormick Property; Terry And Sell Lease [WWI]), Yosemite Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00094	281	281			Cr	98219	Spotted Fawn Mine (Spotted Fawn Claim; U.S.A. Mine [1918]), Ziehlke Claims Group [1948] (Last Chance Claim; Morning Glory Claim; Murphy Lease; Pereira Property; C. M. Quigg Lease On Pereira Property [1918]; C And M Quigg Lease), Peoria Flat, Yosemite Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00095	281	281			Cr	98189	Shafer Lease Occurrence (Pereira Mine [1918]), Ziehlke Claims Group [1948] (Last Chance Claim; Morning Glory Claim; Murphy Lease; Pereira Property; C. M. Quigg Lease On Pereira Property [1918]; C And M Quigg Lease), Peoria Flat, Yosemite Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00096	281	281			Cr	98145	Richards Mine [2] (Annex Chrome Mine; Rough And Ready Mine [1918]), Peoria Flat, Yosemite Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00097	281	281			Cr	98236	Sullivan And Kahl Lease, Peoria Flat, Yosemite Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00098	281	281			Cr	98085	Phoenix Mine, Peoria Flat, Yosemite Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00099	281	281			Cr	98224	Stanislaus River Chrome Mine, New Melones Dam, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00130	281	281			Cr	97598	Booker Lease (Booker Lease Occurrence), Beckwith Ranch Mines, Yosemite Junction, Tuolumne Co., California, USA	Moiser et al. (2012)	USGSSIR2012_5157

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
Hg-00034	5.3	0		Imiterite	Hg	3581	Golden Rule Mine, Jumper & Golden Rule Group (Jumper Mine; Jumper Claim; Jumper Deposit; New Era Claim), Jamestown Mine (Jamestown Group), Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA	Studemeister (1984)	MD19_202
NAVDAT-15320	88	86				220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-15321	85	81				220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-15956	91	86				220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-15957	91	86				220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-32472	94.6	77.4				220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-32498	94.6	77.4				220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-36776	90.7	83.9				251450	Wagner, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-36783	87	81.5				98080	Peugh Placer (Pit Run Gravel), Kennedy Meadow, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-46350	88.2	88				220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-7499	65	0				98245	Unspecified Au Occurrence [10], Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-7501	9.4	9				98108	Unnamed Stone Quarry [2], Joes Point, Tuolumne Co., California, USA	NAVDAT	NAVDAT
USGS-U-Th-Pb-00882_206_238	162.5	162.5	Zircon			97655	Contact Mine, Big Oak Flat, Big Oak Flat District, East Belt, Tuolumne Co., California, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00882_207_235	157.4	157.4	Zircon			97655	Contact Mine, Big Oak Flat, Big Oak Flat District, East Belt, Tuolumne Co., California, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02179_206_238	116.1	116.1	Zircon			250088	Ascension Mountain, Tuolumne Co., California, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02179_207_235	110.7	110.7	Zircon			250088	Ascension Mountain, Tuolumne Co., California, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
vms-01038	170	170			S	98041	Oak Hill Mine (Olsen Mine), Buzzard Point, Tuolumne Co., California, USA	Moiser et al. (2009)	USGSOFR2009_1034