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:
Exeter, Tulare Co., California, USA

Oldest recorded age at locality: 130
Youngest recorded age at locality: 110

mindat Locality ID: 211129
mindat URL: http://www.mindat.org/loc-211129.html

Tectonic Settings:

Total number of sublocalities beneath "Exeter, Tulare Co., California, USA": 8
Total number of bottom-level sublocalities: 7

Number of Child Localities: 7
Child Localities:
Badger Hill
Casenberger Ranch (Gassenberger Ranch)
Joyner Brothers Mine (Merryman)
Mitchell Magnesite Mine
S. P. Brick And Tile Company Mine
Southwest Side Of Rocky Hill
Unnamed Zoisite Occurrence [1]

Latitude: 36°17'25"N
Longitude: 119°6'19"W
Decimal Degree (lat, lon): 36.290277777778,-119.10527777778

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.

Calcite	Epidote	None	Quartz	Spinel

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 C Ca H Mg O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Epidote None Quartz Spinel

4 IMA Minerals at location:

Magnesite ()*	Quartz ()*	Spinel ()*	Zoisite ()*

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
Magnesite ()*	Calcite	Mg(CO₃)	130	110	3	182360,182362,182363	1487
Quartz ()*	Quartz	SiO₂			1	182361	61156
Spinel ()*	Spinel	MgAl₂O₄			1	182365	1934
Zoisite ()*	Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)			1	182366	1025

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Sample Num	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
NAVDAT-30909	130	110	120±10			30909		97512	Wood Magnesite Mine, Badger Hill, Exeter, Tulare Co., California, USA	NAVDAT	NAVDAT
USGS-U-Th-Pb-00636_206_238	120.6	120.6	120.6	206_238	zircon		Zircon	97360	Joyner Brothers Mine (Merryman), Exeter, Tulare Co., California, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00636_207_206	121	121	121	207_206	zircon		Zircon	97360	Joyner Brothers Mine (Merryman), Exeter, Tulare Co., California, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00636_207_235	120.7	120.7	120.7	207_235	zircon		Zircon	97360	Joyner Brothers Mine (Merryman), Exeter, Tulare Co., California, USA	USGS-U-Th-Pb	USGS-U-Th-Pb

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...