Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Tuolumne Meadows, Tuolumne Co., California, USA

Oldest recorded age at locality: 94.6
Youngest recorded age at locality: 77.4

mindat Locality ID: 220090
mindat URL: http://www.mindat.org/loc-220090.html

Tectonic Settings:

Total number of sublocalities beneath "Tuolumne Meadows, Tuolumne Co., California, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 37°52'21"N
Longitude: 119°21'22"W
Decimal Degree (lat, lon): 37.8725,-119.35611111111

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Feldspar	None

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al K O Si

Elements from minerals reported directly at this locality: Al K O Si

Structural Groups for minerals in this locality:
Feldspar None

1 IMA Minerals at location:

Microcline ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Microcline ()*	Feldspar	K(AlSi₃O₈)	94.6	77.4	0		4924

7 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Sample Num	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
NAVDAT-15320	88	86	87±1	15320	220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-15321	85	81	83±2	15321	220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-15956	91	86	88+3/-2	15956	220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-15957	91	86	88+3/-2	15957	220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-32472	94.6	77.4	86±8.6	32472	220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-32498	94.6	77.4	86±8.6	32498	220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT
NAVDAT-46350	88.2	88	88.1±0.1	46350	220090	Tuolumne Meadows, Tuolumne Co., California, USA	NAVDAT	NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...