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:
Timber Knob, Madera Co., California, USA

Oldest recorded age at locality: 146
Youngest recorded age at locality: 90.1

mindat Locality ID: 248235
mindat URL: http://www.mindat.org/loc-248235.html

Tectonic Settings:

Total number of sublocalities beneath "Timber Knob, Madera Co., California, USA": 7
Total number of bottom-level sublocalities: 7

Number of Child Localities: 7
Child Localities:
Bull Of The Woods Nos. 1-3 (Bull Of The Woods No. 1-3)
Cloverleaf Nos. 1 And 2 Claims
Cobb Occurrence (Ward Brothers; Punjab)
Jimmie Claim
Mark Prospect
Sheep Crossing Prospect
Strawberry Mine (Strawberry Tungsten Mine; Strawberry-Macdougald Tungsten; Strawberry Tungsten Deposits)

Latitude: 37°33'43"N
Longitude: 119°16'32"W
Decimal Degree (lat, lon): 37.561944444444,-119.27555555556

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.

Arsenopyrite	Calcite	Clinozoisite	Epidote	Feldspar	Garnet	Molybdenite	None	Pyrite	Quartz
Scheelite	Sphalerite	Spinel	Vesuvianite	Wollastonite

Andradite ()*	Arsenopyrite ()*	Calcite ()*	Epidote ()*	Magnetite ()*
Molybdenite ()*	Orthoclase ()*	Powellite ()*	Pyrite ()*	Quartz ()*
Scheelite ()*	Sphalerite ()*	Vesuvianite ()*	Wollastonite ()*

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 As C Ca F Fe H K Mg Mo Na O S Si W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Arsenopyrite Calcite Clinozoisite Epidote Feldspar Garnet Molybdenite None Pyrite Quartz
Scheelite Sphalerite Spinel Vesuvianite Wollastonite

14 IMA Minerals at location:

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
Andradite ()*	Garnet	Ca₃Fe³⁺₂(SiO₄)₃	146	90.1	1	162382	1534
Arsenopyrite ()*	Arsenopyrite	FeAsS	146	90.1	1	162382	9052
Calcite ()*	Calcite	Ca(CO₃)	146	90.1	1	162382	27770
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	146	90.1	1	162382	8173
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	146	90.1	1	162382	14899
Molybdenite ()*	Molybdenite	MoS₂	146	90.1	1	162382	5800
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	146	90.1	1	162382	2349
Powellite ()*	Scheelite	Ca(MoO₄)	146	90.1	1	162382	494
Pyrite ()*	Pyrite	FeS₂	146	90.1	1	162382	39462
Quartz ()*	Quartz	SiO₂	146	90.1	1	162382	61156
Scheelite ()*	Scheelite	Ca(WO₄)	146	90.1	1	162382	4894
Sphalerite ()*	Sphalerite	ZnS	146	90.1	1	162382	21482
Vesuvianite ()*	Vesuvianite	(Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀	146	90.1	1	162382	1395
Wollastonite ()*	Wollastonite	CaSiO₃	146	90.1	1	162382	1247

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Sample Num	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
NAVDAT-9126	146	100	123±23			zircon	9126	Zircon	248235	Timber Knob, Madera Co., California, USA	NAVDAT	NAVDAT
USGS-Rb-Sr-07074	99.3	90.1	94.7±4.6	Rb-Sr	age of intrusion	whole rock			248235	Timber Knob, Madera Co., California, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-07071	99.3	90.1	94.7±4.6	Rb-Sr	age of intrusion	whole rock			81667	Jimmie Claim, Timber Knob, Madera Co., California, USA	USGS-Rb-Sr	USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...