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:
Jeff Davis Co., Texas, USA

Oldest recorded age at locality: 38
Youngest recorded age at locality: 26

mindat Locality ID: 42905
mindat URL: http://www.mindat.org/loc-42905.html

Tectonic Settings:

Total number of sublocalities beneath "Jeff Davis Co., Texas, USA": 13
Total number of bottom-level sublocalities: 6

Number of Child Localities: 5
Child Localities:
Chispa
Chispa Mine
Davis Mts
Fort Davis
Nunn Hill

Latitude: 30°40'3"N
Longitude: 104°34'14"W
Decimal Degree (lat, lon): 30.6675,-104.57055555556

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.

Amorphous	Baryte	Calcite	Clay	Coronadite	Corundum	Cristobalite	Diaspore	Feldspar	Fluorite
Kaolinite	None	Pyrite	Pyrophyllite	Quartz	Rutile	Smectite-vermiculite	Spinel	Zircon

Alunite ()*	Baryte ()*	Calcite ()*	Cristobalite ()*	Cryptomelane ()*
Fluorite ()*	Goethite ()*	Hematite ()*	Hollandite ()*	Kaolinite ()*
Magnetite ()*	Montmorillonite ()*	Opal ()*	Pyrite ()*	Pyrophyllite ()*
Quartz ()*	Romanèchite ()*	Rutile ()*	Sanidine ()*	Zircon ()*

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 Ba C Ca F Fe H K Mg Mn Na O S Si Ti Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amorphous Baryte Calcite Clay Coronadite Corundum Cristobalite Diaspore Feldspar Fluorite
Kaolinite None Pyrite Pyrophyllite Quartz Rutile Smectite-vermiculite Spinel Zircon

20 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
Alunite ()*	None	KAl₃(SO₄)₂(OH)₆			2	270486,270488	966
Baryte ()*	Baryte	Ba(SO₄)			1	270483	11547
Calcite ()*	Calcite	Ca(CO₃)			1	270494	27770
Cristobalite ()*	Cristobalite	SiO₂			1	270486	453
Cryptomelane ()*	Coronadite	K(Mn⁴⁺₇Mn³⁺)O₁₆			1	270494	599
Fluorite ()*	Fluorite	CaF₂			1	270483	9617
Goethite ()*	Diaspore	FeO(OH)			2	270483,270494	7437
Hematite ()*	Corundum	Fe₂O₃			1	270483	14640
Hollandite ()*	Coronadite	Ba(Mn⁴⁺₆Mn³⁺₂)O₁₆			1	270483	243
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄			2	270486,270488	5591
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			1	270494	14899
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O			1	270486	1508
Opal ()*	Amorphous	SiO₂·nH₂O			1	270486	2994
Pyrite ()*	Pyrite	FeS₂			1	270483	39462
Pyrophyllite ()*	Clay Pyrophyllite	Al₂Si₄O₁₀(OH)₂			1	270488	771
Quartz ()*	Quartz	SiO₂			3	270483,270486,270494	61156
Romanèchite ()*	None	(Ba,H₂O)₂(Mn⁴⁺,Mn³⁺)₅O₁₀			1	270483	312
Rutile ()*	Rutile	TiO₂			1	270488	5614
Sanidine ()*	Feldspar	K(AlSi₃O₈)	38	26	1	270491	598
Zircon ()*	Zircon	Zr(SiO₄)			2	270486,270494	5251

2 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	NAVDAT-33643	38	26	35.6+2.4/-9.6					33643						221878	Limpia Canyon, Fort Davis, Jeff Davis Co., Texas, USA		NAVDAT		NAVDAT
	NAVDAT-38193	38	26	36.8+1.2/-10.8					38193						221878	Limpia Canyon, Fort Davis, Jeff Davis Co., Texas, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...