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Badu Hill pegmatite, Llano, Llano Co., Texas, USAi
Regional Level Types
Badu Hill pegmatitePegmatite
Llano- not defined -
Llano Co.County
TexasState
USACountry

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Zone of hydrothermal alteration/deposition

Badu Hill pegmatite, Llano, Llano Co., Texas, USA
View SW across the Badu Hill Pegmatite

Badu Hill pegmatite, Llano, Llano Co., Texas, USA
Zone of hydrothermal alteration/deposition

Badu Hill pegmatite, Llano, Llano Co., Texas, USA
View SW across the Badu Hill Pegmatite

Badu Hill pegmatite, Llano, Llano Co., Texas, USA
Zone of hydrothermal alteration/deposition

Badu Hill pegmatite, Llano, Llano Co., Texas, USA
Latitude & Longitude (WGS84):
30° 43' 27'' North , 98° 28' 26'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Buchanan Dam1,519 (2011)4.4km
Kingsland6,030 (2011)8.0km
Buchanan Lake Village692 (2011)14.3km
Highland Haven452 (2017)14.9km
Sunrise Beach Village731 (2017)15.1km
Other/historical names associated with this locality:
Badu Hill Mine, Badu Hill Quarry


A REE-U-Th-Co-Au-Ag-Cu-Pb-Ti-As-Gd-Zr-W pegmatite occurrence located 13 miles east of Llano, SW of Buchanan Dam.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


37 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Acanthite
Formula: Ag2S
Description: Occurs in Sulfide-zones, along with Gold and Copper.
Reference: Self-collected by David Aldridge, March 2006.
Albite
Formula: Na(AlSi3O8)
Reference: Kelly Nash (also, Art Smith)
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Reference: R&M 66:3 pp 196-224
Anatase
Formula: TiO2
Description: Occurs in limonite matrix.
Reference: R&M 66:3 pp 196-224
Arsenopyrite
Formula: FeAsS
Description: Occurs with Pyrite, as dark-silver inclusions.
Reference: Self-collected by David Aldridge, March, 2006.
'Bastnäsite'
Reference: R&M 66:3 pp 196-224
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: R&M 66:3 pp 196-224
Bornite
Formula: Cu5FeS4
Description: Occurs as coatings on Quartz, and sulfide-dwelling Microcline.
Reference: Self-collected by David Aldridge, March, 2006.
Chalcanthite
Formula: CuSO4 · 5H2O
Description: Efflorvescent deposits occur by a natural acid-pool.
Reference: Self-collected by David Aldridge, March, 2006.
Chalcocite
Formula: Cu2S
Description: Occurs as coatings on quartz, and as MXLS in Limonite.
Reference: Self-collected by David Aldridge, March, 2006.
Chalcopyrite
Formula: CuFeS2
Description: Occurs in Sulfide-zones, along with Copper.
Reference: Self-collected by David Aldridge, March, 2006.
Churchite-(Y)
Formula: Y(PO4) · 2H2O
Description: Occurs as small sprays in sulfide zones.
Reference: Self-collected by David Aldridge, March, 2006.
Cobaltite
Formula: CoAsS
Description: Small amounts found near the acid-pool.
Reference: Self-collected by David Aldridge, March, 2006.
Copper
Formula: Cu
Description: Copper occurs along with gold in the sulfide zones.
Reference: Self-collected by David Aldridge, March, 2006.
Diopside
Formula: CaMgSi2O6
Reference: Franklin Roberts
'Fergusonite'
Description: Occurs as crystal inclusions in pyrite.
Reference: Self-collected by David Aldridge, March, 2006.
Fluorite
Formula: CaF2
Reference: R&M 66:3 pp 196-224
'Gadolinite'
Reference: R&M 66:3 pp 196-224
Galena
Formula: PbS
Description: Occurs with Pyrite.
Reference: Self-collected by David Aldridge, March, 2006.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: R&M 66:3 pp 196-224
Goethite
Formula: α-Fe3+O(OH)
Description: Occurs in Fe-sulfide zones along with Limonite.
Reference: Self-collected by David Aldridge, March, 2006.
Gold
Formula: Au
Description: Gold MXLS found in sulfide zones.
Reference: Self-collected by David Aldridge, March, 2006.
Grossular
Formula: Ca3Al2(SiO4)3
Reference: Self-collected by Franklin Roberts, May, 2010.
'Gummite'
Colour: Vivid yellow
Description: Occurs as coatings in sulfide-zones, along with Uraninite
Reference: Self-collected by David Aldridge, March, 2006.
Hematite
Formula: Fe2O3
Reference: R&M 66:3 pp 196-224; Self-Collected March 2006, Occurs in Fe-sulfide zones along with Limonite
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Reference: R&M 66:3 pp 196-224
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: R&M 66:3 pp 196-224
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Self-collected by David Aldridge, March, 2006.
Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
Reference: David Aldridge specimen
Microcline
Formula: K(AlSi3O8)
Reference: R&M 66:3 pp 196-224
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: R&M 66:3 pp 196-224
Pyrite
Formula: FeS2
Reference: R&M 66:3 pp 196-224
Quartz
Formula: SiO2
Reference: R&M 66:3 pp 196-224
Rutile
Formula: TiO2
Reference: Visual ID, Art Smith specimen (K. Nash)
Samarskite-(Y) ?
Formula: YFe3+Nb2O8
Reference: R&M 66:3 pp 196-224
'Scapolite'
Reference: Self-collected by Franklin Roberts, May, 2010.
Scheelite
Formula: Ca(WO4)
Reference: R&M 66:3 pp 196-224
Silver
Formula: Ag
Description: Occurs in Sulfide-zones, along with Gold and Copper.
Reference: Self-collected by David Aldridge, March, 2006.
Synchysite-(Y)
Formula: CaY(CO3)2F
Reference: R&M 66:3 pp 196-224
'Thorogummite'
Formula: (Th,U)(SiO4)1-x(OH)4x
Reference: R&M 66:3 pp 196-224
Titanite
Formula: CaTi(SiO4)O
Reference: R&M 66:3 pp 196-224
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Habit: Tabular
Colour: Green
Description: Small, green tabular crystals found in Cu-rich zones.
Reference: Self-collected by David Aldridge, March, 2006.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Am Min 67:180
Uraninite
Formula: UO2
Description: Occurs as MXLS in sulfide-zones. Pseudomorphs of Gummite and Thorogummite are seen.
Reference: Self-collected by David Aldridge, March, 2006.
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Description: Occurs as small tufts in sulfide zone.
Reference: Self-collected by David Aldridge, March, 2006.
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Reference: Self-collected by Franklin Roberts, May, 2010.
Wollastonite
Formula: CaSiO3
Reference: Self-collected by Franklin Roberts, May, 2010.
Zircon
Formula: Zr(SiO4)
Reference: R&M 66:3 pp 196-224

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Gold1.AA.05Au
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Acanthite2.BA.35Ag2S
Arsenopyrite2.EB.20FeAsS
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Cobaltite2.EB.25CoAsS
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Samarskite-(Y) ?4.DB.25YFe3+Nb2O8
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Synchysite-(Y)5.BD.20cCaY(CO3)2F
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Chalcanthite7.CB.20CuSO4 · 5H2O
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Melanterite7.CB.35Fe2+(H2O)6SO4 · H2O
Scheelite7.GA.05Ca(WO4)
Group 8 - Phosphates, Arsenates and Vanadates
Churchite-(Y)8.CJ.50Y(PO4) · 2H2O
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Diopside9.DA.15CaMgSi2O6
Grossular9.AD.25Ca3Al2(SiO4)3
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Titanite9.AG.15CaTi(SiO4)O
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Wollastonite9.DG.05CaSiO3
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Bastnäsite'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Fergusonite'-
'Gadolinite'-
'Garnet Group'-X3Z2(SiO4)3
'Gummite'-
'Limonite'-(Fe,O,OH,H2O)
'Scapolite'-
'Thorogummite'-(Th,U)(SiO4)1-x(OH)4x
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Gold1.1.1.1Au
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Cobaltite2.12.3.1CoAsS
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Anatase4.4.4.1TiO2
Rutile4.4.1.1TiO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Samarskite-(Y) ?8.1.11.1YFe3+Nb2O8
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Synchysite-(Y)16a.1.3.2CaY(CO3)2F
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Chalcanthite29.6.7.1CuSO4 · 5H2O
Melanterite29.6.10.1Fe2+(H2O)6SO4 · H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
(AB)5(XO4)2·xH2O
Churchite-(Y)40.4.6.1Y(PO4) · 2H2O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Grossular51.4.3b.2Ca3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
'Thorogummite'51.5.2.5(Th,U)(SiO4)1-x(OH)4x
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Uranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Single-Width Unbranched Chains, W=1 with chains P=3
Wollastonite65.2.1.1cCaSiO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Bastnäsite'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Fergusonite'-
'Gadolinite'-
'Garnet Group'-X3Z2(SiO4)3
'Gummite'-
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)
'Scapolite'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H JarositeKFe3+ 3(SO4)2(OH)6
H KaoliniteAl2(Si2O5)(OH)4
H MuscoviteKAl2(AlSi3O10)(OH)2
H Thorogummite(Th,U)(SiO4)1-x(OH)4x
H MelanteriteFe2+(H2O)6SO4 · H2O
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H Limonite(Fe,O,OH,H2O)
H ChalcanthiteCuSO4 · 5H2O
H Churchite-(Y)Y(PO4) · 2H2O
H Goethiteα-Fe3+O(OH)
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
B Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CCarbon
C Synchysite-(Y)CaY(CO3)2F
OOxygen
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O AnataseTiO2
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O Garnet GroupX3Z2(SiO4)3
O HematiteFe2O3
O JarositeKFe3+ 3(SO4)2(OH)6
O KaoliniteAl2(Si2O5)(OH)4
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O ScheeliteCa(WO4)
O Synchysite-(Y)CaY(CO3)2F
O Thorogummite(Th,U)(SiO4)1-x(OH)4x
O TitaniteCaTi(SiO4)O
O ZirconZr(SiO4)
O MelanteriteFe2+(H2O)6SO4 · H2O
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O Limonite(Fe,O,OH,H2O)
O ChalcanthiteCuSO4 · 5H2O
O Churchite-(Y)Y(PO4) · 2H2O
O Goethiteα-Fe3+O(OH)
O UraniniteUO2
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O RutileTiO2
O WollastoniteCaSiO3
O Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
O GrossularCa3Al2(SiO4)3
O DiopsideCaMgSi2O6
O AlbiteNa(AlSi3O8)
O Samarskite-(Y)YFe3+Nb2O8
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F FluoriteCaF2
F Synchysite-(Y)CaY(CO3)2F
F Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
NaSodium
Na Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Mg DiopsideCaMgSi2O6
AlAluminium
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al KaoliniteAl2(Si2O5)(OH)4
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Al GrossularCa3Al2(SiO4)3
Al AlbiteNa(AlSi3O8)
SiSilicon
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si Garnet GroupX3Z2(SiO4)3
Si KaoliniteAl2(Si2O5)(OH)4
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si Thorogummite(Th,U)(SiO4)1-x(OH)4x
Si TitaniteCaTi(SiO4)O
Si ZirconZr(SiO4)
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si WollastoniteCaSiO3
Si Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Si GrossularCa3Al2(SiO4)3
Si DiopsideCaMgSi2O6
Si AlbiteNa(AlSi3O8)
PPhosphorus
P TorberniteCu(UO2)2(PO4)2 · 12H2O
P Churchite-(Y)Y(PO4) · 2H2O
SSulfur
S JarositeKFe3+ 3(SO4)2(OH)6
S PyriteFeS2
S MelanteriteFe2+(H2O)6SO4 · H2O
S ChalcanthiteCuSO4 · 5H2O
S ChalcociteCu2S
S BorniteCu5FeS4
S GalenaPbS
S ArsenopyriteFeAsS
S AcanthiteAg2S
S ChalcopyriteCuFeS2
S CobaltiteCoAsS
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K JarositeKFe3+ 3(SO4)2(OH)6
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca FluoriteCaF2
Ca ScheeliteCa(WO4)
Ca Synchysite-(Y)CaY(CO3)2F
Ca TitaniteCaTi(SiO4)O
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Ca WollastoniteCaSiO3
Ca Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Ca GrossularCa3Al2(SiO4)3
Ca DiopsideCaMgSi2O6
TiTitanium
Ti AnataseTiO2
Ti TitaniteCaTi(SiO4)O
Ti RutileTiO2
FeIron
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe HematiteFe2O3
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe PyriteFeS2
Fe MelanteriteFe2+(H2O)6SO4 · H2O
Fe Limonite(Fe,O,OH,H2O)
Fe Goethiteα-Fe3+O(OH)
Fe BorniteCu5FeS4
Fe ArsenopyriteFeAsS
Fe ChalcopyriteCuFeS2
Fe Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Fe Samarskite-(Y)YFe3+Nb2O8
CoCobalt
Co CobaltiteCoAsS
CuCopper
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
Cu ChalcanthiteCuSO4 · 5H2O
Cu CopperCu
Cu ChalcociteCu2S
Cu BorniteCu5FeS4
Cu ChalcopyriteCuFeS2
AsArsenic
As ArsenopyriteFeAsS
As CobaltiteCoAsS
YYttrium
Y Synchysite-(Y)CaY(CO3)2F
Y Churchite-(Y)Y(PO4) · 2H2O
Y Samarskite-(Y)YFe3+Nb2O8
ZrZirconium
Zr ZirconZr(SiO4)
NbNiobium
Nb Samarskite-(Y)YFe3+Nb2O8
AgSilver
Ag AcanthiteAg2S
Ag SilverAg
WTungsten
W ScheeliteCa(WO4)
AuGold
Au GoldAu
PbLead
Pb GalenaPbS
ThThorium
Th Thorogummite(Th,U)(SiO4)1-x(OH)4x
UUranium
U Thorogummite(Th,U)(SiO4)1-x(OH)4x
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U UraniniteUO2
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Proterozoic
541 - 2500 Ma



ID: 2800145
Town Mountain Granite

Age: Proterozoic (541 - 2500 Ma)

Stratigraphic Name: Town Mountain Granite

Description: Coarse-grained, pink, quartz-plagioclase-microcline rock, in part porphyritic with large microcline phenocrysts. Occurs in plutons up to 13 mi in size that tend to be concordant circular vertical cylinders with concentric textural variaions; boundaries range from sharp and regular to highly irregular with wide zones of mixed rock. Makes up Enchanted Rock granite mass, Gillespie and Llano Counties.

Comments: Original map source: Stoeser, Douglas B., Shock, Nancy, Green, Gregory N., Dumonceaux, Gayle M., and Heran, William D., 2005, Geologic Map Database of Texas, USGS, DS 170, scale 1:500,000.

Lithology: Major:{granite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Mesoproterozoic
1000 - 1600 Ma



ID: 3191604
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Comments: Llano Uplift

Lithology: Schist; paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
American Mineralogist (1982): 67: 180.
Rocks & Minerals (1991): 66(3): 196-224.


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