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Vermiculite Mine (MRDS - 10013422), Gem Park complex, Fremont Co., Colorado, USAi
Regional Level Types
Vermiculite Mine (MRDS - 10013422)Mine
Gem Park complexComplex
Fremont Co.County
ColoradoState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84): 38° 16' 1'' North , 105° 32' 44'' West
Latitude & Longitude (decimal): 38.26695,-105.54560
GeoHash:G#: 9wucwq211
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
Westcliffe577 (2017)16.3km
Silver Cliff591 (2017)17.0km
Coaldale255 (2011)21.5km
Howard723 (2011)32.3km
Cañon City16,400 (2013)32.7km


Ref.: Eckel, Edwin B. (1997),Minerals of Colorado, updated & revised: 16. Located East of Democratic Mountain (S ½ sec. 33, T. 47 S., R. 73 W.).
REF:Deposit:: PARKER, R. L. AND SHARP, W. N., 1970, MAFIC-ULTRAMAFIC IGNEOUS ROCKS AND ASSOCIATED CARBONATITES OF THE GEM PARK COMPLEX, CUSTER AND FREMONT COUNTIES, COLORADO: USGS PROFESSIONAL PAPER 649, 24 P.
Deposit:: TAYLOR, R. B., SCOTT, G. R., WOBUS, R
Commodities (Major) - Vermiculite; (Minor) - Niobium (Columbium); (Trace) - REE, Thorium
Development Status: Past Producer
Structure: Gem Park Complex, Central Cordillera (Southern Rocky Mountains)
Host Rock: Pyroxenite, Gabbro, Dolomite, Carbonate
Tectonic Structure: Wet Mountains

Regions containing this locality

North America PlatePlate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


34 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:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Aegirine
Formula: NaFe3+Si2O6
Analcime
Formula: Na(AlSi2O6) · H2O
Anatase
Formula: TiO2
Ancylite-(Ce)
Formula: CeSr(CO3)2(OH) · H2O
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
'Apatite'
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Baryte
Formula: BaSO4
Bornite
Formula: Cu5FeS4
Brookite
Formula: TiO2
Calcite
Formula: CaCO3
'Carbonate'
'Columbite-(Fe)-Columbite-(Mn) Series'
Dolomite
Formula: CaMg(CO3)2
Fersmite
Formula: (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Fluorite
Formula: CaF2
Ilmenite
Formula: Fe2+TiO3
Lueshite
Formula: NaNbO3
Magnesio-riebeckite
Formula: ⃞{Na2}{Mg3Fe3+2}(Si8O22)(OH)2
Magnetite
Formula: Fe2+Fe3+2O4
Monazite-(Ce)
Formula: Ce(PO4)
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Natroniobite
Formula: NaNbO3
Nickeline
Formula: NiAs
Perovskite
Formula: CaTiO3
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Pyrite
Formula: FeS2
'Pyrochlore Group'
Formula: A2Nb2(O,OH)6Z
Pyrrhotite
Formula: Fe7S8
Quartz
Formula: SiO2
Riebeckite
Formula: ⃞[Na2][Fe2+3Fe3+2]Si8O22(OH)2
'Riebeckite Root Name'
Formula: ⃞[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'Riebeckite Root Name var: Crocidolite'
Formula: ⃞[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
Rutile
Formula: TiO2
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Sodalite
Formula: Na8(Al6Si6O24)Cl2
Strontianite
Formula: SrCO3
Thorianite
Formula: ThO2
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
'Wad'

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Nickeline2.CC.05NiAs
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Brookite4.DD.10TiO2
Fersmite4.DG.05(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Ilmenite4.CB.05Fe2+TiO3
Lueshite4.CC.30NaNbO3
Magnetite4.BB.05Fe2+Fe3+2O4
Natroniobite4.CC.30NaNbO3
Perovskite4.CC.30CaTiO3
'Pyrochlore Group'4.00.A2Nb2(O,OH)6Z
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Thorianite4.DL.05ThO2
Group 5 - Nitrates and Carbonates
Ancylite-(Ce)5.DC.05CeSr(CO3)2(OH) · H2O
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Strontianite5.AB.15SrCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
Monazite-(Ce)8.AD.50Ce(PO4)
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Aegirine9.DA.25NaFe3+Si2O6
Analcime9.GB.05Na(AlSi2O6) · H2O
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Magnesio-riebeckite9.DE.25⃞{Na2}{Mg3Fe3+2}(Si8O22)(OH)2
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Riebeckite9.DE.25⃞[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Sodalite9.FB.10Na8(Al6Si6O24)Cl2
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Carbonate'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Riebeckite Root Name'-⃞[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'var: Crocidolite'-⃞[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Wad'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Nickeline2.8.11.1NiAs
Pyrrhotite2.8.10.1Fe7S8
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Lueshite4.3.3.4NaNbO3
Natroniobite4.3.4.1NaNbO3
Perovskite4.3.3.1CaTiO3
AX2
Anatase4.4.4.1TiO2
Brookite4.4.5.1TiO2
Rutile4.4.1.1TiO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Thorianite5.1.1.2ThO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
'Pyrochlore Group'8.2.1.1A2Nb2(O,OH)6Z
AB2O6
Fersmite8.3.3.1(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Strontianite14.1.3.3SrCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 16b - HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
Ancylite-(Ce)16b.1.1.1CeSr(CO3)2(OH) · H2O
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(PO4)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Aegirine65.1.3c.2NaFe3+Si2O6
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Vermiculite71.2.2d.3Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
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 Feldspathoids and related species
Sodalite76.2.3.1Na8(Al6Si6O24)Cl2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Apatite'-
'Carbonate'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
Magnesio-riebeckite-⃞{Na2}{Mg3Fe3+2}(Si8O22)(OH)2
Riebeckite-⃞[Na2][Fe2+3Fe3+2]Si8O22(OH)2
'Riebeckite Root Name'-⃞[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'var: Crocidolite'-⃞[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Wad'-

List of minerals for each chemical element

HHydrogen
H Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
H Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
H Magnesio-riebeckite⃞{Na2}{Mg3Fe23+}(Si8O22)(OH)2
H NatroliteNa2Al2Si3O10 · 2H2O
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Pyrochlore GroupA2Nb2(O,OH)6Z
H Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
H VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
H AnalcimeNa(AlSi2O6) · H2O
H Riebeckite Root Name (var: Crocidolite)⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H Riebeckite Root Name⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
CCarbon
C Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
C AnkeriteCa(Fe2+,Mg)(CO3)2
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C StrontianiteSrCO3
OOxygen
O AegirineNaFe3+Si2O6
O AnataseTiO2
O Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
O AnkeriteCa(Fe2+,Mg)(CO3)2
O BaryteBaSO4
O CalciteCaCO3
O DolomiteCaMg(CO3)2
O Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
O IlmeniteFe2+TiO3
O LueshiteNaNbO3
O Magnesio-riebeckite⃞{Na2}{Mg3Fe23+}(Si8O22)(OH)2
O MagnetiteFe2+Fe23+O4
O Monazite-(Ce)Ce(PO4)
O NatroliteNa2Al2Si3O10 · 2H2O
O NatroniobiteNaNbO3
O PerovskiteCaTiO3
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Pyrochlore GroupA2Nb2(O,OH)6Z
O Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
O StrontianiteSrCO3
O ThorianiteThO2
O VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
O AnalcimeNa(AlSi2O6) · H2O
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O BrookiteTiO2
O Riebeckite Root Name (var: Crocidolite)⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
O QuartzSiO2
O RutileTiO2
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O SodaliteNa8(Al6Si6O24)Cl2
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O Riebeckite Root Name⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
FFluorine
F Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
F Riebeckite Root Name (var: Crocidolite)⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
F FluoriteCaF2
F Riebeckite Root Name⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
NaSodium
Na AegirineNaFe3+Si2O6
Na Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Na LueshiteNaNbO3
Na Magnesio-riebeckite⃞{Na2}{Mg3Fe23+}(Si8O22)(OH)2
Na NatroliteNa2Al2Si3O10 · 2H2O
Na NatroniobiteNaNbO3
Na Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
Na AnalcimeNa(AlSi2O6) · H2O
Na Riebeckite Root Name (var: Crocidolite)⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Na SodaliteNa8(Al6Si6O24)Cl2
Na Riebeckite Root Name⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg DolomiteCaMg(CO3)2
Mg Magnesio-riebeckite⃞{Na2}{Mg3Fe23+}(Si8O22)(OH)2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al NatroliteNa2Al2Si3O10 · 2H2O
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Al AnalcimeNa(AlSi2O6) · H2O
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Al SodaliteNa8(Al6Si6O24)Cl2
SiSilicon
Si AegirineNaFe3+Si2O6
Si Magnesio-riebeckite⃞{Na2}{Mg3Fe23+}(Si8O22)(OH)2
Si NatroliteNa2Al2Si3O10 · 2H2O
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
Si VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Si AnalcimeNa(AlSi2O6) · H2O
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Riebeckite Root Name (var: Crocidolite)⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Si QuartzSiO2
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si SodaliteNa8(Al6Si6O24)Cl2
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si Riebeckite Root Name⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
PPhosphorus
P Monazite-(Ce)Ce(PO4)
SSulfur
S BaryteBaSO4
S BorniteCu5FeS4
S PyrrhotiteFe7S8
S PyriteFeS2
ClChlorine
Cl Riebeckite Root Name (var: Crocidolite)⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Cl SodaliteNa8(Al6Si6O24)Cl2
Cl Riebeckite Root Name⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
Ca Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Ca PerovskiteCaTiO3
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca FluoriteCaF2
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
TiTitanium
Ti AnataseTiO2
Ti Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Ti IlmeniteFe2+TiO3
Ti PerovskiteCaTiO3
Ti BrookiteTiO2
Ti RutileTiO2
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe AegirineNaFe3+Si2O6
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe BorniteCu5FeS4
Fe IlmeniteFe2+TiO3
Fe Magnesio-riebeckite⃞{Na2}{Mg3Fe23+}(Si8O22)(OH)2
Fe MagnetiteFe2+Fe23+O4
Fe PyrrhotiteFe7S8
Fe Riebeckite⃞[Na2][Fe32+Fe23+]Si8O22(OH)2
Fe VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe Riebeckite Root Name (var: Crocidolite)⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Fe PyriteFeS2
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Riebeckite Root Name⃞[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
NiNickel
Ni NickelineNiAs
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu BorniteCu5FeS4
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
AsArsenic
As NickelineNiAs
SrStrontium
Sr Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
Sr StrontianiteSrCO3
NbNiobium
Nb Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Nb LueshiteNaNbO3
Nb NatroniobiteNaNbO3
Nb Pyrochlore GroupA2Nb2(O,OH)6Z
BaBarium
Ba BaryteBaSO4
CeCerium
Ce Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
Ce Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Ce Monazite-(Ce)Ce(PO4)
TaTantalum
Ta Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
ThThorium
Th ThorianiteThO2

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

Cambrian
485.4 - 541 Ma



ID: 2949727
Intrusive rocks

Age: Cambrian (485.4 - 541 Ma)

Description: Alkalic and mafic intrusive rocks in small plutons, and diabase dikes

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{hypabyssal mafic alkaline,diorite}

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]

Paleoproterozoic
1600 - 2500 Ma



ID: 3186950
Paleoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1600 - 2500 Ma)

Lithology: Orthogneiss/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

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Armbrustmacher, T. J. (1988) Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado. USGS Professional Paper: 1049-F


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