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:
Knippa, Uvalde Co., Texas, USA

mindat Locality ID: 250595
mindat URL: http://www.mindat.org/loc-250595.html

Tectonic Settings:

Total number of sublocalities beneath "Knippa, Uvalde Co., Texas, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Knippa Quarry (Whites Mines; Texas Traprock Quarries; Traprock Hill)

Latitude: 29°17'28"N
Longitude: 99°39'6"W
Decimal Degree (lat, lon): 29.291111111111,-99.651666666667

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.

Baryte	Calcite	Chlorite	Clay	Corundum	Gadolinite	Natrolite	None	Olivine	Serpentine
Spinel	Tridymite

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 B Ba C Ca Fe H K Mg Na O S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Baryte Calcite Chlorite Clay Corundum Gadolinite Natrolite None Olivine Serpentine
Spinel Tridymite

10 IMA Minerals at location:

Baryte ()*	Calcite ()*	Chamosite ()*	Datolite ()*	Forsterite ()*
Gonnardite ()*	Hematite ()*	Lizardite ()*	Nepheline ()*	Spinel ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Baryte ()*	Baryte	Ba(SO₄)	1	271056	11547
Calcite ()*	Calcite	Ca(CO₃)	1	271056	27770
Chamosite ()*	Chlorite Clay	(Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈	1	271056	577
Datolite ()*	Gadolinite	CaB(SiO₄)(OH)	1	271056	498
Forsterite ()*	Olivine	Mg₂(SiO₄)	1	271056	1188
Gonnardite ()*	Natrolite	(Na,Ca)₂(Si,Al)₅O₁₀·3H₂O	1	271056	167
Hematite ()*	Corundum	Fe₂O₃	1	271056	14640
Lizardite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	1	271056	359
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	1	271056	884
Spinel ()*	Spinel	MgAl₂O₄	1	271056	1934

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...