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Karnes Uranium Mining District, Karnes County, Texas, USAi
Regional Level Types
Karnes Uranium Mining DistrictMining District
Karnes CountyCounty
TexasState
USACountry

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PhotosMapsSearchMineralogy
09028820017272058195765.jpg
Pile of concretions.

Sickenius Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
03252690017272058205110.jpg
Concretions

Sickenius Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
08421620017272058208437.jpg
High Wall

Sickenius Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
09028820017272058195765.jpg
Pile of concretions.

Sickenius Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
03252690017272058205110.jpg
Concretions

Sickenius Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
08421620017272058208437.jpg
High Wall

Sickenius Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
09028820017272058195765.jpg
Pile of concretions.

Sickenius Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
03252690017272058205110.jpg
Concretions

Sickenius Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
Latitude & Longitude (WGS84):
28° North , 98° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~38km
GRN:
N20W61
Type:
Mining District
Köppen climate type:
Cfa : Humid subtropical climate
Mindat Locality ID:
27869
Long-form identifier:
mindat:1:2:27869:5
GUID (UUID V4):
0


This district is located about 45 miles South of San Antonio. The uranium deposits of this district are overlain by tuffaceous sandstone. Mineralization occurs within the uranium ore bodies and within concretions in the overlying sediments. Virtually all, if not all, of the open pit mines are now reclaimed.

Both sides of Farm Road 791 east from county line to Falls City.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

29 valid minerals.

Rock Types Recorded


Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aragonite
Formula: CaCO3
ⓘ Autunite
Formula: Ca(UO2)2(PO4)2 · 10-12H2O
ⓘ Baryte
Formula: BaSO4
ⓘ Calcite
Formula: CaCO3
ⓘ Carnotite
Formula: K2(UO2)2(VO4)2 · 3H2O
ⓘ 'Clinoptilolite Subgroup'
Formula: (Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
ⓘ Coffinite
Formula: U(SiO4) · nH2O
ⓘ Cristobalite
Formula: SiO2
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Gypsum var. Selenite
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
ⓘ 'Heulandite Subgroup'
Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ Ilsemannite
Formula: Mo3O8 · nH2O
ⓘ Iriginite
Formula: (UO2)Mo2O7 · 3H2O
ⓘ Jarosite
Formula: KFe3+3(SO4)2(OH)6
ⓘ Jordisite
Formula: MoS2
ⓘ 'Limonite'
ⓘ 'Manganese Oxides'
ⓘ 'Manganese Oxides var. Manganese Dendrites'
ⓘ Marcasite
Formula: FeS2
ⓘ Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6H2O
ⓘ Metatyuyamunite
Formula: Ca(UO2)2(VO4)2 · 3H2O
ⓘ Molybdenite
Formula: MoS2
ⓘ Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘ Mourite
Formula: UMo5O12(OH)10
ⓘ Native Selenium
Formula: Se
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Opal var. Opal-Agate
Formula: SiO2 · nH2O
ⓘ 'Petrified Wood'
ⓘ 'Phillipsite Subgroup'
Formula: (Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
ⓘ Powellite
Formula: Ca(MoO4)
ⓘ 'Psilomelane'
ⓘ Pyrite
Formula: FeS2
Localities: Reported from at least 7 localities in this region.
ⓘ Pyrolusite
Formula: Mn4+O2
ⓘ Quartz
Formula: SiO2
Colour: Light blue
Description: Includes light blue, transparent crystals.
ⓘ Quartz var. Amethyst
Formula: SiO2
ⓘ Quartz var. Chalcedony
Formula: SiO2
Colour: Bluish-gray, gray
ⓘ Quartz var. Rock Crystal
Formula: SiO2
ⓘ Schoepite
Formula: (UO2)8O2(OH)12 · 12H2O
ⓘ Tyuyamunite
Formula: Ca(UO2)2(VO4)2 · 5-8H2O
ⓘ Uraninite
Formula: UO2
ⓘ Uraninite var. Pitchblende
Formula: UO2
ⓘ Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O

Gallery:

BaSO4ⓘ Baryte
trans.png
Baryte, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Baryte, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Baryte, etc.

Wright-McGrady Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Baryte, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Baryte, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Baryte, etc.

Wright-McGrady Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Baryte, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Baryte, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
CaCO3ⓘ Calcite
trans.png
Calcite

Wright-McGrady Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Calcite, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Calcite

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Calcite

Wright-McGrady Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Calcite, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Calcite

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Calcite

Wright-McGrady Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Calcite, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
K2(UO2)2(VO4)2 · 3H2Oⓘ Carnotite
trans.png
Carnotite

Tordilla Hill prospects, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Carnotite

Tordilla Hill prospects, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Carnotite

Tordilla Hill prospects, Karnes Uranium Mining District, Karnes County, Texas, USA
CaSO4 · 2H2Oⓘ Gypsum
trans.png
Gypsum, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Gypsum

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Gypsum, etc.

Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Gypsum, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Gypsum

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Gypsum, etc.

Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Gypsum, etc.

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Gypsum

Lyssy mine, Karnes Uranium Mining District, Karnes County, Texas, USA
CaSO4 · 2H2Oⓘ Gypsum var. Selenite
trans.png
Selenite, etc.

Kellner mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Selenite

Kellner mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Selenite, etc.

Pfeil Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Selenite, etc.

Kellner mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Selenite

Kellner mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Selenite, etc.

Pfeil Mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Selenite, etc.

Kellner mine, Karnes Uranium Mining District, Karnes County, Texas, USA
trans.png
Selenite

Kellner mine, Karnes Uranium Mining District, Karnes County, Texas, USA

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Selenium1.CC.10Se
Group 2 - Sulphides and Sulfosalts
ⓘJordisite2.EA.30MoS2
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
ⓘHematite4.CB.05Fe2O3
ⓘQuartz
var. Amethyst		4.DA.05SiO2
ⓘvar. Chalcedony4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘvar. Rock Crystal4.DA.05SiO2
ⓘOpal4.DA.10SiO2 · nH2O
ⓘvar. Opal-Agate4.DA.10SiO2 · nH2O
ⓘCristobalite4.DA.15SiO2
ⓘPyrolusite4.DB.05Mn4+O2
ⓘUraninite
var. Pitchblende		4.DL.05UO2
ⓘ4.DL.05UO2
ⓘIlsemannite4.FJ.15Mo3O8 · nH2O
ⓘMourite4.FL.80UMo5O12(OH)10
ⓘSchoepite4.GA.05(UO2)8O2(OH)12 · 12H2O
ⓘIriginite4.GB.60(UO2)Mo2O7 · 3H2O
ⓘCarnotite4.HB.05K2(UO2)2(VO4)2 · 3H2O
ⓘMetatyuyamunite4.HB.25Ca(UO2)2(VO4)2 · 3H2O
ⓘTyuyamunite4.HB.25Ca(UO2)2(VO4)2 · 5-8H2O
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘAragonite5.AB.15CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
ⓘJarosite7.BC.10KFe3+3(SO4)2(OH)6
ⓘGypsum7.CD.40CaSO4 · 2H2O
ⓘvar. Selenite7.CD.40CaSO4 · 2H2O
ⓘPowellite7.GA.05Ca(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘAutunite8.EB.05Ca(UO2)2(PO4)2 · 10-12H2O
ⓘMeta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6H2O
Group 9 - Silicates
ⓘCoffinite9.AD.30U(SiO4) · nH2O
ⓘUranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘMontmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Unclassified
ⓘ'Clinoptilolite Subgroup'-(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
ⓘ'Heulandite Subgroup'-(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
ⓘ'Limonite'-
ⓘ'Phillipsite Subgroup'-(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
ⓘ'Psilomelane'-
ⓘ'Petrified Wood'-
ⓘ'Manganese Oxides
var. Manganese Dendrites'		-
ⓘ''-

List of minerals for each chemical element

HHydrogen
Hⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Hⓘ CarnotiteK2(UO2)2(VO4)2 · 3H2O
Hⓘ Clinoptilolite Subgroup(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
Hⓘ CoffiniteU(SiO4) · nH2O
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Hⓘ IlsemanniteMo3O8 · nH2O
Hⓘ Iriginite(UO2)Mo2O7 · 3H2O
Hⓘ JarositeKFe33+(SO4)2(OH)6
Hⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Hⓘ MetatyuyamuniteCa(UO2)2(VO4)2 · 3H2O
Hⓘ MouriteUMo5O12(OH)10
Hⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Hⓘ OpalSiO2 · nH2O
Hⓘ Opal var. Opal-AgateSiO2 · nH2O
Hⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Hⓘ Schoepite(UO2)8O2(OH)12 · 12H2O
Hⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
Hⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Hⓘ Gypsum var. SeleniteCaSO4 · 2H2O
CCarbon
Cⓘ AragoniteCaCO3
Cⓘ CalciteCaCO3
OOxygen
Oⓘ Quartz var. AmethystSiO2
Oⓘ AragoniteCaCO3
Oⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Oⓘ BaryteBaSO4
Oⓘ CalciteCaCO3
Oⓘ CarnotiteK2(UO2)2(VO4)2 · 3H2O
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ Clinoptilolite Subgroup(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
Oⓘ CoffiniteU(SiO4) · nH2O
Oⓘ CristobaliteSiO2
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Oⓘ IlsemanniteMo3O8 · nH2O
Oⓘ Iriginite(UO2)Mo2O7 · 3H2O
Oⓘ JarositeKFe33+(SO4)2(OH)6
Oⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Oⓘ MetatyuyamuniteCa(UO2)2(VO4)2 · 3H2O
Oⓘ MouriteUMo5O12(OH)10
Oⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Oⓘ OpalSiO2 · nH2O
Oⓘ Opal var. Opal-AgateSiO2 · nH2O
Oⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Oⓘ Uraninite var. PitchblendeUO2
Oⓘ PowelliteCa(MoO4)
Oⓘ PyrolusiteMn4+O2
Oⓘ QuartzSiO2
Oⓘ Schoepite(UO2)8O2(OH)12 · 12H2O
Oⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
Oⓘ UraniniteUO2
Oⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Oⓘ Gypsum var. SeleniteCaSO4 · 2H2O
Oⓘ Quartz var. Rock CrystalSiO2
NaSodium
Naⓘ Clinoptilolite Subgroup(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
Naⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Naⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Naⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
MgMagnesium
Mgⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Alⓘ Clinoptilolite Subgroup(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
Alⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Alⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Alⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
SiSilicon
Siⓘ Quartz var. AmethystSiO2
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ Clinoptilolite Subgroup(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
Siⓘ CoffiniteU(SiO4) · nH2O
Siⓘ CristobaliteSiO2
Siⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Siⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Siⓘ OpalSiO2 · nH2O
Siⓘ Opal var. Opal-AgateSiO2 · nH2O
Siⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Siⓘ QuartzSiO2
Siⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Siⓘ Quartz var. Rock CrystalSiO2
PPhosphorus
Pⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Pⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
SSulfur
Sⓘ BaryteBaSO4
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ JarositeKFe33+(SO4)2(OH)6
Sⓘ JordisiteMoS2
Sⓘ MarcasiteFeS2
Sⓘ MolybdeniteMoS2
Sⓘ PyriteFeS2
Sⓘ Gypsum var. SeleniteCaSO4 · 2H2O
KPotassium
Kⓘ CarnotiteK2(UO2)2(VO4)2 · 3H2O
Kⓘ Clinoptilolite Subgroup(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
Kⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Kⓘ JarositeKFe33+(SO4)2(OH)6
Kⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
CaCalcium
Caⓘ AragoniteCaCO3
Caⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Caⓘ CalciteCaCO3
Caⓘ Clinoptilolite Subgroup(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Caⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Caⓘ MetatyuyamuniteCa(UO2)2(VO4)2 · 3H2O
Caⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Caⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Caⓘ PowelliteCa(MoO4)
Caⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
Caⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Caⓘ Gypsum var. SeleniteCaSO4 · 2H2O
VVanadium
Vⓘ CarnotiteK2(UO2)2(VO4)2 · 3H2O
Vⓘ MetatyuyamuniteCa(UO2)2(VO4)2 · 3H2O
Vⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
MnManganese
Mnⓘ PyrolusiteMn4+O2
FeIron
Feⓘ HematiteFe2O3
Feⓘ JarositeKFe33+(SO4)2(OH)6
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
SeSelenium
Seⓘ Native SeleniumSe
MoMolybdenum
Moⓘ IlsemanniteMo3O8 · nH2O
Moⓘ Iriginite(UO2)Mo2O7 · 3H2O
Moⓘ JordisiteMoS2
Moⓘ MolybdeniteMoS2
Moⓘ MouriteUMo5O12(OH)10
Moⓘ PowelliteCa(MoO4)
BaBarium
Baⓘ BaryteBaSO4
Baⓘ Phillipsite Subgroup(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
UUranium
Uⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Uⓘ CarnotiteK2(UO2)2(VO4)2 · 3H2O
Uⓘ CoffiniteU(SiO4) · nH2O
Uⓘ Iriginite(UO2)Mo2O7 · 3H2O
Uⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Uⓘ MetatyuyamuniteCa(UO2)2(VO4)2 · 3H2O
Uⓘ MouriteUMo5O12(OH)10
Uⓘ Uraninite var. PitchblendeUO2
Uⓘ Schoepite(UO2)8O2(OH)12 · 12H2O
Uⓘ TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
Uⓘ UraniniteUO2
Uⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Cherepon, Alan J., Minerals of the Karnes Uranium District - The Franklin of Texas.
www.wma-minelife.com/uranium/papers/karnes.htm
Smith, Arthur E. (1991) Texas Mineral Locality Index. Rocks & Minerals, 66 (3) 196-224 doi:10.1080/00357529.1991.11761622
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