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Yogo District, Little Belt Mountains, Judith Basin County, Montana, USAi
Regional Level Types
Yogo DistrictMining District
Little Belt MountainsMountain Range
Judith Basin CountyCounty
MontanaState
USACountry

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Mindat Locality ID:
50256
Long-form identifier:
mindat:1:2:50256:5
GUID (UUID V4):
b010b7f9-b3c1-49a7-8218-9de6bc7428c4


30 miles west of Garnell. Au, Ag, Cu, Pb.

Select Mineral List Type

StandardDetailedGalleryStrunzChemical 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

20 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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

Select Rock List Type

Alphabetical ListTree Diagram

Detailed Mineral List:

Aegirine
Formula:NaFe3+Si2O6
'Amphibole Supergroup'
Formula:AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Analcime
Formula:Na(AlSi2O6) · H2O
Ankerite
Formula:Ca(Fe2+,Mg)(CO3)2
'Apatite'
Formula:Ca5(PO4)3(Cl/F/OH)
Augite
Formula:(CaxMgyFez)(Mgy1Fez1)Si2O6
Baryte
Formula:BaSO4
'Biotite'
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
References:
Calcite
Formula:CaCO3
'Chlorite Group'
'Clinopyroxene Subgroup'
References:
Corundum
Formula:Al2O3
Corundum var. Sapphire
Formula:Al2O3
Habit: up to 15mm
Colour: Bright blue
Description: Blue (Fe2+/Ti4+ charge transfer) or purple (Cr).Xenolithic.
Diopside
Formula:CaMgSi2O6
Dolomite
Formula:CaMg(CO3)2
Forsterite
Formula:Mg2SiO4
References:
Gold
Formula:Au
Hematite
Formula:Fe2O3
'Hornblende Root Name Group'
Formula:◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
Magnetite
Formula:Fe2+Fe3+2O4
Description: With Al-rich rims.Rims pleonaste.
Microcline
Formula:K(AlSi3O8)
References:
Nepheline
Formula:Na3K(Al4Si4O16)
References:
'Orthopyroxene Subgroup'
References:
Phlogopite
Formula:KMg3(AlSi3O10)(OH)2
Description: Mg-rich core.Fe/Ba-rich rims.
'Plagioclase'
Formula:(Na,Ca)[(Si,Al)AlSi2]O8
Description: In pyrope-cpx-plagioclase granulite xenolith.
Pyrite
Formula:FeS2
Pyrope
Formula:Mg3Al2(SiO4)3
Description: In pyrope-cpx-plagioclase granulite xenolith.
'Serpentine Subgroup'
Formula:D3[Si2O5](OH)4
Spinel
Formula:MgAl2O4
Description: Rims sapphire.Mixture of Al-rich material with the Yogo magma.
Spinel var. Pleonaste
Formula:(Mg,Fe)Al2O4
Description: Rims sapphire.Mixture of Al-rich material with the Yogo magma.
Zircon
Formula:Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Spinel4.BB.05MgAl2O4
var. Pleonaste4.BB.05(Mg,Fe)Al2O4
Corundum4.CB.05Al2O3
Hematite4.CB.05Fe2O3
Corundum
var. Sapphire
4.CB.05Al2O3
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Dolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 9 - Silicates
Forsterite9.AC.05Mg2SiO4
Pyrope9.AD.25Mg3Al2(SiO4)3
Zircon9.AD.30Zr(SiO4)
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Diopside9.DA.15CaMgSi2O6
Aegirine9.DA.25NaFe3+Si2O6
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Nepheline9.FA.05Na3K(Al4Si4O16)
Microcline9.FA.30K(AlSi3O8)
Analcime9.GB.05Na(AlSi2O6) · H2O
Unclassified
'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
'Chlorite Group'-
'Clinopyroxene Subgroup'-
'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
'Orthopyroxene Subgroup'-
'Serpentine Subgroup'-D3[Si2O5](OH)4
'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
HAmphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
HAnalcimeNa(AlSi2O6) · H2O
HBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
HPhlogopiteKMg3(AlSi3O10)(OH)2
HHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
HSerpentine SubgroupD3[Si2O5](OH)4
HApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
CAnkeriteCa(Fe2+,Mg)(CO3)2
CCalciteCaCO3
CDolomiteCaMg(CO3)2
OOxygen
OAegirineNaFe3+Si2O6
OAmphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
OAnalcimeNa(AlSi2O6) · H2O
OAnkeriteCa(Fe2+,Mg)(CO3)2
OAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
OBaryteBaSO4
OBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
OCalciteCaCO3
OCorundumAl2O3
ODiopsideCaMgSi2O6
ODolomiteCaMg(CO3)2
OForsteriteMg2SiO4
OHematiteFe2O3
OMagnetiteFe2+Fe23+O4
OMicroclineK(AlSi3O8)
ONephelineNa3K(Al4Si4O16)
OPhlogopiteKMg3(AlSi3O10)(OH)2
OPyropeMg3Al2(SiO4)3
OCorundum var.SapphireAl2O3
OSpinelMgAl2O4
OZirconZr(SiO4)
OSpinel var.Pleonaste(Mg,Fe)Al2O4
OHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
OPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
OSerpentine SubgroupD3[Si2O5](OH)4
OApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
FAmphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
NaAegirineNaFe3+Si2O6
NaAnalcimeNa(AlSi2O6) · H2O
NaNephelineNa3K(Al4Si4O16)
NaPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
MgAnkeriteCa(Fe2+,Mg)(CO3)2
MgAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
MgBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MgDiopsideCaMgSi2O6
MgDolomiteCaMg(CO3)2
MgForsteriteMg2SiO4
MgPhlogopiteKMg3(AlSi3O10)(OH)2
MgPyropeMg3Al2(SiO4)3
MgSpinelMgAl2O4
MgSpinel var.Pleonaste(Mg,Fe)Al2O4
AlAluminium
AlAmphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
AlAnalcimeNa(AlSi2O6) · H2O
AlBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlCorundumAl2O3
AlMicroclineK(AlSi3O8)
AlNephelineNa3K(Al4Si4O16)
AlPhlogopiteKMg3(AlSi3O10)(OH)2
AlPyropeMg3Al2(SiO4)3
AlCorundum var.SapphireAl2O3
AlSpinelMgAl2O4
AlSpinel var.Pleonaste(Mg,Fe)Al2O4
AlHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
AlPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
SiAegirineNaFe3+Si2O6
SiAmphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiAnalcimeNa(AlSi2O6) · H2O
SiAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
SiBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
SiDiopsideCaMgSi2O6
SiForsteriteMg2SiO4
SiMicroclineK(AlSi3O8)
SiNephelineNa3K(Al4Si4O16)
SiPhlogopiteKMg3(AlSi3O10)(OH)2
SiPyropeMg3Al2(SiO4)3
SiZirconZr(SiO4)
SiHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSerpentine SubgroupD3[Si2O5](OH)4
PPhosphorus
PApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
SBaryteBaSO4
SPyriteFeS2
ClChlorine
ClAmphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ClHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
ClApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
KBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
KMicroclineK(AlSi3O8)
KNephelineNa3K(Al4Si4O16)
KPhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
CaAnkeriteCa(Fe2+,Mg)(CO3)2
CaAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
CaCalciteCaCO3
CaDiopsideCaMgSi2O6
CaDolomiteCaMg(CO3)2
CaHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
CaPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
CaApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
TiAmphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
TiBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
FeAegirineNaFe3+Si2O6
FeAnkeriteCa(Fe2+,Mg)(CO3)2
FeAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
FeBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeHematiteFe2O3
FeMagnetiteFe2+Fe23+O4
FePyriteFeS2
FeSpinel var.Pleonaste(Mg,Fe)Al2O4
ZrZirconium
ZrZirconZr(SiO4)
BaBarium
BaBaryteBaSO4
AuGold
AuGoldAu

Fossils

There are 2 fossil localities from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences61
Youngest Fossil Listed299 Ma (Carboniferous)
Oldest Fossil Listed359 Ma (Late/Upper Devonian)
Stratigraphic Units
UnitNo. OccurrencesAge
Otter1330.9 - 318.1 Ma (Carboniferous)
Madison - Lodgepole60358.9 - 298.9 Ma (Paleozoic)
Fossils from RegionClick here to show the list.
Accepted NameHierarchyAge
Aulopora
genus
Animalia :Cnidaria :Anthozoa :Auloporidae :Aulopora358.9 - 298.9 Ma
Paleozoic
Cleistopora
genus
Animalia :Cnidaria :Anthozoa :Favositidae :Cleistopora358.9 - 298.9 Ma
Paleozoic
Syringopora
genus
Animalia :Cnidaria :Anthozoa :Favositidae :Syringopora358.9 - 298.9 Ma
Paleozoic
Lithostrotion
genus
Animalia :Cnidaria :Anthozoa :Lithostrotionidae :Lithostrotion358.9 - 298.9 Ma
Paleozoic
Lithostrotionella
genus
Animalia :Cnidaria :Anthozoa :Petalaxidae :Lithostrotionella358.9 - 298.9 Ma
Paleozoic
Vesiculophyllum
genus
Animalia :Cnidaria :Anthozoa :Uraliniidae :Vesiculophyllum358.9 - 298.9 Ma
Paleozoic
Platyceras
genus
Animalia :Mollusca :Gastropoda :Platyceratidae :Platyceras358.9 - 298.9 Ma
Paleozoic
Edmondia
genus
Animalia :Mollusca :Bivalvia :Adapedonta :Edmondiidae :Edmondia358.9 - 298.9 Ma
Paleozoic
Grammysia
genus
Animalia :Mollusca :Bivalvia :Grammysiidae :Grammysia358.9 - 298.9 Ma
Paleozoic
Exochops
genus
Animalia :Arthropoda :Trilobita :Proetida :Proetidae :Exochops358.9 - 298.9 Ma
Paleozoic
Cheilotrypa
genus
Animalia :Bryozoa :Stenolaemata :Cystoporida :Fistuliporidae :Cheilotrypa358.9 - 298.9 Ma
Paleozoic
Sulcoretepora
genus
Animalia :Bryozoa :Stenolaemata :Cystoporida :Cystodictyonidae :Sulcoretepora358.9 - 298.9 Ma
Paleozoic
Rhombopora
genus
Animalia :Bryozoa :Stenolaemata :Cryptostomida :Rhabdomesidae :Rhombopora358.9 - 298.9 Ma
Paleozoic
Fenestralia
genus
Animalia :Bryozoa :Stenolaemata :Fenestralia358.9 - 298.9 Ma
Paleozoic
Chonetes
genus
Animalia :Brachiopoda :Strophomenata :Productida :Chonetidae :Chonetes358.9 - 298.9 Ma
Paleozoic
Dictyoclostus
genus
Animalia :Brachiopoda :Strophomenata :Productida :Productidae :Dictyoclostus358.9 - 298.9 Ma
Paleozoic
Leptagonia
genus
Animalia :Brachiopoda :Strophomenata :Strophomenida :Rafinesquinidae :Leptagonia358.9 - 298.9 Ma
Paleozoic
Linoproductus
genus
Animalia :Brachiopoda :Strophomenata :Productida :Linoproductidae :Linoproductus358.9 - 298.9 Ma
Paleozoic
Schuchertella
genus
Animalia :Brachiopoda :Strophomenata :Orthotetida :Schuchertellidae :Schuchertella358.9 - 298.9 Ma
Paleozoic
Camarotoechia
genus
Animalia :Brachiopoda :Rhynchonellata :Rhynchonellida :Camarotoechiidae :Camarotoechia358.9 - 298.9 Ma
Paleozoic
Composita
genus
Animalia :Brachiopoda :Rhynchonellata :Athyridida :Athyrididae :Composita358.9 - 298.9 Ma
Paleozoic
Delthyris
genus
Animalia :Brachiopoda :Rhynchonellata :Spiriferida :Delthyrididae :Delthyris358.9 - 298.9 Ma
Paleozoic
Eumetria
genus
Animalia :Brachiopoda :Rhynchonellata :Athyridida :Retziidae :Eumetria358.9 - 298.9 Ma
Paleozoic
Reticularia
genus
Animalia :Brachiopoda :Rhynchonellata :Spiriferida :Reticulariidae :Reticularia358.9 - 298.9 Ma
Paleozoic
Spirifer
genus
Animalia :Brachiopoda :Rhynchonellata :Spiriferida :Spiriferidae :Spirifer358.9 - 298.9 Ma
Paleozoic
Atrypa
genus
Animalia :Brachiopoda :Rhynchonellata :Atrypida :Atrypidae :Atrypa358.9 - 298.9 Ma
Paleozoic
Dielasma
genus
Animalia :Brachiopoda :Rhynchonellata :Terebratulida :Dielasmatidae :Dielasma358.9 - 298.9 Ma
Paleozoic
Pentremites
genus
Animalia :Echinodermata :Pentremitidae :Pentremites358.9 - 298.9 Ma
Paleozoic
Cactocrinus
genus
Animalia :Echinodermata :Crinoidea :Actinocrinitidae :Cactocrinus358.9 - 298.9 Ma
Paleozoic
Culmicrinus
genus
Animalia :Echinodermata :Crinoidea :Culmicrinus358.9 - 298.9 Ma
Paleozoic
Dinotocrinus
genus
Animalia :Echinodermata :Crinoidea :Dinotocrinus358.9 - 298.9 Ma
Paleozoic
Loxonematidae
family
Animalia :Mollusca :Gastropoda :Loxonematidae358.9 - 298.9 Ma
Paleozoic
Nautiloidea
subclass
Animalia :Mollusca :Cephalopoda :Nautiloidea358.9 - 298.9 Ma
Paleozoic
Euomphalidae
family
Animalia :Mollusca :Gastropoda :Euomphalidae358.9 - 298.9 Ma
Paleozoic
Platyceras niagarensis
species
Animalia :Mollusca :Gastropoda :Euomphalina :Platyceratidae :Platyceras :Platyceras niagarensis358.9 - 298.9 Ma
Paleozoic
Platycrinus
genus
Platycrinus358.9 - 298.9 Ma
Paleozoic
Schizophoria depressa
species
Animalia :Brachiopoda :Rhynchonellata :Orthida :Schizophoriidae :Schizophoria :Schizophoria depressa330.9 - 323.2 Ma
Carboniferous
Leptagonia analoga
species
Animalia :Brachiopoda :Strophomenata :Strophomenida :Rafinesquinidae :Leptagonia :Leptagonia analoga358.9 - 298.9 Ma
Paleozoic
Schellwienella inflata
species
Animalia :Brachiopoda :Strophomenata :Orthotetida :Pulsiidae :Schellwienella :Schellwienella inflata358.9 - 298.9 Ma
Paleozoic
Mesochorispira grimesi
species
Animalia :Brachiopoda :Rhynchonellata :Spiriferida :Spiriferidae :Mesochorispira :Mesochorispira grimesi358.9 - 298.9 Ma
Paleozoic
Fossil LocalitiesClick to show 2 fossil localities

Localities in this Region

Other Regions, Features and Areas that Intersect


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, pleaseregister so you can add to our database. This locality information is for reference purposes only. You should never attempt tovisit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holdersfor access and that you are aware of all safety precautions necessary.
 
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