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Stillwater County, Montana, USAi
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09060660017272046199115.jpg
"Trainload of chrome ore emerging from a mine tunnel", 1942

Benbow Mine, Stillwater County, Montana, USA
09060660017272046199115.jpg
"Trainload of chrome ore emerging from a mine tunnel", 1942

Benbow Mine, Stillwater County, Montana, USA
09060660017272046199115.jpg
"Trainload of chrome ore emerging from a mine tunnel", 1942

Benbow Mine, Stillwater County, Montana, USA
Type:
Largest Settlements:
PlacePopulation
Columbus2,042(2017)
Absarokee1,150(2011)
Park City983(2011)
Reed Point193(2011)
Mindat Locality ID:
19987
Long-form identifier:
mindat:1:2:19987:5
GUID (UUID V4):
0
Other Languages:

82 valid minerals.6(TL) - type locality of valid minerals.1(FRL) - first recorded locality of unapproved mineral/variety/etc.

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:

Actinolite
Formula:◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Almandine
Formula:Fe2+3Al2(SiO4)3
Anorthite
Formula:Ca(Al2Si2O8)
Anorthite var. Bytownite
Formula:(Ca,Na)[Al(Al,Si)Si2O8]
'Apatite'
Formula:Ca5(PO4)3(Cl/F/OH)
Arsenopalladinite
Formula:Pd8(As,Sb)3
Arsenopyrite
Formula:FeAsS
Atokite
Formula:(Pd,Pt)3Sn
'Biotite'
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Bornite
Formula:Cu5FeS4
Braggite
Formula:PdPt3S4
Localities: Reported from at least8 localities in this region.
Calcite
Formula:CaCO3
Carrollite
Formula:CuCo2S4
'Chabazite'
Chalcopyrite
Formula:CuFeS2
Localities: Reported from at least22 localities in this region.
Chlorapatite
Formula:Ca5(PO4)3Cl
'Chlorite Group'
Chromite
Formula:Fe2+Cr3+2O4
Localities: Reported from at least12 localities in this region.
Cobaltite
Formula:CoAsS
Cooperite
Formula:PtS
Localities: Reported from at least6 localities in this region.
Cordierite
Formula:Mg2Al4Si5O18
Covellite
Formula:CuS
Cubanite
Formula:CuFe2S3
Cuprite
Formula:Cu2O
Enstatite
Formula:Mg2Si2O6
Localities: Reported from at least6 localities in this region.
Enstatite var. Bronzite
Formula:(Mg,Fe2+)2[SiO3]2
Localities: Reported from at least6 localities in this region.
Epidote
Formula:(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
'Fayalite-Forsterite Series'
Localities: Reported from at least10 localities in this region.
Forsterite
Formula:Mg2SiO4
Galena
Formula:PbS
Gersdorffite
Formula:NiAsS
Graphite
Formula:C
Grossular
Formula:Ca3Al2(SiO4)3
Heazlewoodite
Formula:Ni3S2
Hematite
Formula:Fe2O3
Hercynite
Formula:Fe2+Al2O4
Hercynite var. Picotite
Formula:(Fe,Mg)(Al,Cr)2O4
Hessite
Formula:Ag2Te
Hollingworthite
Formula:(Rh,Pt,Pd)AsS
'Hornblende Root Name Group'
Formula:◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
Ilmenite
Formula:Fe2+TiO3
Localities: Reported from at least6 localities in this region.
Isoferroplatinum
Formula:Pt3Fe
Keithconnite (TL)
Formula:Pd20Te7
Kojonenite (TL)
Formula:Pd7-xSnTe2 (0.3 ≤ x ≤ 0.8)
Type Locality:
Kotulskite
Formula:Pd(Te,Bi)2-x (x ≈ 0.4)
Description: with moncheite
Laurite
Formula:RuS2
Mackinawite
Formula:FeS
Magnetite
Formula:Fe2+Fe3+2O4
Localities: Reported from at least15 localities in this region.
Marcasite
Formula:FeS2
Mertieite
Formula:Pd8Sb2.5As0.5
Michenerite
Formula:PdBiTe
Millerite
Formula:NiS
Localities: Reported from at least6 localities in this region.
Moncheite
Formula:Pt(Te,Bi)2
Localities: Reported from at least10 localities in this region.
Mooihoekite
Formula:Cu9Fe9S16
Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Muscovite var. Sericite
Formula:KAl2(AlSi3O10)(OH)2
Native Copper
Formula:Cu
Native Gold
Formula:Au
Native Gold var. Electrum
Formula:(Au,Ag)
Native Gold var. Palladium-bearing Gold
Formula:(Au,Pd)
Native Palladium
Formula:(Pd,Pt)
Native Platinum ?
Formula:Pt
Native Rhodium (TL)
Formula:(Rh,Pt)
Type Locality:
Natrolite
Formula:Na2Al2Si3O10 · 2H2O
Nickeline
Formula:NiAs
Nontronite
Formula:Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Palarstanide
Formula:Pd5(Sn,As)2
Palladoarsenide
Formula:Pd2As
Palladobismutharsenide (TL)
Formula:Pd2(As,Bi)
Type Locality:
Pentlandite
Formula:(NixFey)Σ9S8
Localities: Reported from at least23 localities in this region.
Phlogopite
Formula:KMg3(AlSi3O10)(OH)2
Pigeonite
Formula:(CaxMgyFez)(Mgy1Fez1)Si2O6
'Plagioclase'
Formula:(Na,Ca)[(Si,Al)AlSi2]O8
Localities: Reported from at least9 localities in this region.
Plumbopalladinite
Formula:Pd3Pb2
Potarite
Formula:PdHg
Pyrite
Formula:FeS2
Localities: Reported from at least12 localities in this region.
Pyrite var. Bravoite
Formula:(Fe,Ni)S2
Pyrrhotite
Formula:Fe1-xS
Localities: Reported from at least23 localities in this region.
Rustenburgite
Formula:(Pt,Pd)3Sn
Rutile
Formula:TiO2
'Serpentine Subgroup'
Formula:D3[Si2O5](OH)4
Sperrylite
Formula:PtAs2
Localities: Reported from at least7 localities in this region.
Sperrylite var. Platarsite
Formula:Pt(As,S)2
Sphalerite
Formula:ZnS
Stannopalladinite
Formula:(Pd,Cu)3Sn
Stibnite
Formula:Sb2S3
'Stilbite Subgroup'
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Stillwaterite (TL)
Formula:Pd8As3
Talc
Formula:Mg3Si4O10(OH)2
Telargpalite
Formula:(Pd,Ag)3(Te,Bi)
Telluropalladinite (TL)
Formula:Pd9Te4
Temagamite
Formula:Pd3HgTe3
'Tetrahedrite Subgroup'
Formula:Cu6(Cu4C2+2)Sb4S12S
Titanite
Formula:CaTi(SiO4)O
Tremolite
Formula:◻Ca2Mg5(Si8O22)(OH)2
Tulameenite
Formula:Pt2CuFe
'UM1986-51-S:Re' (FRL)
Formula:Re2S3
Type Locality:
Violarite
Formula:Fe2+Ni3+2S4
Vysotskite
Formula:PdS
Localities: Reported from at least9 localities in this region.
Zircon
Formula:Zr(SiO4)
Zvyagintsevite
Formula:Pd3Pb

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Native Copper1.AA.05Cu
Native Gold
var. Electrum
1.AA.05(Au,Ag)
1.AA.05Au
var. Palladium-bearing Gold1.AA.05(Au,Pd)
Potarite1.AD.25PdHg
Native Palladium1.AF.10(Pd,Pt)
Native Platinum ?1.AF.10Pt
Native Rhodium (TL)1.AF.10(Rh,Pt)
Atokite1.AG.10(Pd,Pt)3Sn
Rustenburgite1.AG.10(Pt,Pd)3Sn
Zvyagintsevite1.AG.10Pd3Pb
Plumbopalladinite1.AG.25Pd3Pb2
Stannopalladinite1.AG.25(Pd,Cu)3Sn
Isoferroplatinum1.AG.35Pt3Fe
Tulameenite1.AG.40Pt2CuFe
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Stillwaterite (TL)2.AC.10aPd8As3
Mertieite2.AC.10bPd8Sb2.5As0.5
Arsenopalladinite2.AC.10cPd8(As,Sb)3
Palarstanide2.AC.20bPd5(Sn,As)2
Palladoarsenide2.AC.25aPd2As
Palladobismutharsenide (TL)2.AC.25fPd2(As,Bi)
Bornite2.BA.15Cu5FeS4
Hessite2.BA.60Ag2Te
Heazlewoodite2.BB.05Ni3S2
Pentlandite2.BB.15(NixFey)Σ9S8
Keithconnite (TL)2.BC.20Pd20Te7
Telluropalladinite (TL)2.BC.30Pd9Te4
Kojonenite (TL)2.BC.35Pd7-xSnTe2 (0.3 ≤ x ≤ 0.8)
Telargpalite2.BC.45(Pd,Ag)3(Te,Bi)
Temagamite2.BC.50Pd3HgTe3
Covellite2.CA.05aCuS
Sphalerite2.CB.05aZnS
Chalcopyrite2.CB.10aCuFeS2
Mooihoekite2.CB.10bCu9Fe9S16
Cubanite2.CB.55aCuFe2S3
Kotulskite2.CC.05Pd(Te,Bi)2-x (x ≈ 0.4)
Nickeline2.CC.05NiAs
Pyrrhotite2.CC.10Fe1-xS
Millerite2.CC.20NiS
Mackinawite2.CC.25FeS
Braggite2.CC.35aPdPt3S4
Vysotskite2.CC.35aPdS
Cooperite2.CC.35bPtS
Galena2.CD.10PbS
Carrollite2.DA.05CuCo2S4
Violarite2.DA.05Fe2+Ni3+2S4
Stibnite2.DB.05Sb2S3
Moncheite2.EA.20Pt(Te,Bi)2
Pyrite
var. Bravoite
2.EB.05a(Fe,Ni)S2
Laurite2.EB.05aRuS2
Sperrylite
var. Platarsite
2.EB.05aPt(As,S)2
Pyrite2.EB.05aFeS2
Sperrylite2.EB.05aPtAs2
Marcasite2.EB.10aFeS2
Arsenopyrite2.EB.20FeAsS
Cobaltite2.EB.25CoAsS
Gersdorffite2.EB.25NiAsS
Hollingworthite2.EB.25(Rh,Pt,Pd)AsS
Michenerite2.EB.25PdBiTe
'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Chromite4.BB.05Fe2+Cr3+2O4
Hercynite4.BB.05Fe2+Al2O4
Magnetite4.BB.05Fe2+Fe3+2O4
Hercynite
var. Picotite
4.BB.05(Fe,Mg)(Al,Cr)2O4
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
Chlorapatite8.BN.05Ca5(PO4)3Cl
Group 9 - Silicates
Forsterite9.AC.05Mg2SiO4
Almandine9.AD.25Fe2+3Al2(SiO4)3
Grossular9.AD.25Ca3Al2(SiO4)3
Zircon9.AD.30Zr(SiO4)
Titanite9.AG.15CaTi(SiO4)O
Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Cordierite9.CJ.10Mg2Al4Si5O18
Enstatite9.DA.05Mg2Si2O6
var. Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
Pigeonite9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
Actinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Tremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Nontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Anorthite9.FA.35Ca(Al2Si2O8)
var. Bytownite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Unclassified
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
'Chabazite'-
'Chlorite Group'-
'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
'Fayalite-Forsterite Series'-
'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
'Serpentine Subgroup'-D3[Si2O5](OH)4
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'UM1986-51-S:Re' (TL)-Re2S3

List of minerals for each chemical element

HHydrogen
HActinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
HBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
HEpidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
HMuscoviteKAl2(AlSi3O10)(OH)2
HNontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
HNatroliteNa2Al2Si3O10 · 2H2O
HPhlogopiteKMg3(AlSi3O10)(OH)2
HStilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
HTalcMg3Si4O10(OH)2
HTremolite◻Ca2Mg5(Si8O22)(OH)2
HHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
HMuscovite var.SericiteKAl2(AlSi3O10)(OH)2
HSerpentine SubgroupD3[Si2O5](OH)4
HApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
CCalciteCaCO3
CGraphiteC
OOxygen
OActinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
OAnorthiteCa(Al2Si2O8)
OAlmandineFe32+Al2(SiO4)3
OBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
OAnorthite var.Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
OCalciteCaCO3
OChlorapatiteCa5(PO4)3Cl
OChromiteFe2+Cr23+O4
OCordieriteMg2Al4Si5O18
OCupriteCu2O
OEnstatiteMg2Si2O6
OEpidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
OForsteriteMg2SiO4
OGrossularCa3Al2(SiO4)3
OHematiteFe2O3
OHercyniteFe2+Al2O4
OIlmeniteFe2+TiO3
OMagnetiteFe2+Fe23+O4
OMuscoviteKAl2(AlSi3O10)(OH)2
ONontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
ONatroliteNa2Al2Si3O10 · 2H2O
OPhlogopiteKMg3(AlSi3O10)(OH)2
OPigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
ORutileTiO2
OStilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
OTalcMg3Si4O10(OH)2
OTitaniteCaTi(SiO4)O
OTremolite◻Ca2Mg5(Si8O22)(OH)2
OZirconZr(SiO4)
OEnstatite var.Bronzite(Mg,Fe2+)2[SiO3]2
OFayalite-Forsterite Series
OHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
OMuscovite var.SericiteKAl2(AlSi3O10)(OH)2
OPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
OHercynite var.Picotite(Fe,Mg)(Al,Cr)2O4
OSerpentine SubgroupD3[Si2O5](OH)4
OApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
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
NaAnorthite var.Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
NaNontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
NaNatroliteNa2Al2Si3O10 · 2H2O
NaPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
MgActinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
MgBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MgCordieriteMg2Al4Si5O18
MgEnstatiteMg2Si2O6
MgForsteriteMg2SiO4
MgPhlogopiteKMg3(AlSi3O10)(OH)2
MgPigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
MgTalcMg3Si4O10(OH)2
MgTremolite◻Ca2Mg5(Si8O22)(OH)2
MgEnstatite var.Bronzite(Mg,Fe2+)2[SiO3]2
MgFayalite-Forsterite Series
MgHercynite var.Picotite(Fe,Mg)(Al,Cr)2O4
AlAluminium
AlAnorthiteCa(Al2Si2O8)
AlAlmandineFe32+Al2(SiO4)3
AlBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAnorthite var.Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
AlCordieriteMg2Al4Si5O18
AlEpidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
AlGrossularCa3Al2(SiO4)3
AlHercyniteFe2+Al2O4
AlMuscoviteKAl2(AlSi3O10)(OH)2
AlNontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
AlNatroliteNa2Al2Si3O10 · 2H2O
AlPhlogopiteKMg3(AlSi3O10)(OH)2
AlStilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
AlHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
AlMuscovite var.SericiteKAl2(AlSi3O10)(OH)2
AlPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
AlHercynite var.Picotite(Fe,Mg)(Al,Cr)2O4
SiSilicon
SiActinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
SiAnorthiteCa(Al2Si2O8)
SiAlmandineFe32+Al2(SiO4)3
SiBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
SiAnorthite var.Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
SiCordieriteMg2Al4Si5O18
SiEnstatiteMg2Si2O6
SiEpidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
SiForsteriteMg2SiO4
SiGrossularCa3Al2(SiO4)3
SiMuscoviteKAl2(AlSi3O10)(OH)2
SiNontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
SiNatroliteNa2Al2Si3O10 · 2H2O
SiPhlogopiteKMg3(AlSi3O10)(OH)2
SiPigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
SiStilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
SiTalcMg3Si4O10(OH)2
SiTitaniteCaTi(SiO4)O
SiTremolite◻Ca2Mg5(Si8O22)(OH)2
SiZirconZr(SiO4)
SiEnstatite var.Bronzite(Mg,Fe2+)2[SiO3]2
SiFayalite-Forsterite Series
SiHornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiMuscovite var.SericiteKAl2(AlSi3O10)(OH)2
SiPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSerpentine SubgroupD3[Si2O5](OH)4
PPhosphorus
PChlorapatiteCa5(PO4)3Cl
PApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
SArsenopyriteFeAsS
SBorniteCu5FeS4
SBraggitePdPt3S4
SPyrite var.Bravoite(Fe,Ni)S2
SCarrolliteCuCo2S4
SChalcopyriteCuFeS2
SCobaltiteCoAsS
SCooperitePtS
SCovelliteCuS
SCubaniteCuFe2S3
SGalenaPbS
SGersdorffiteNiAsS
SHeazlewooditeNi3S2
SHollingworthite(Rh,Pt,Pd)AsS
SLauriteRuS2
SMackinawiteFeS
SMarcasiteFeS2
SMilleriteNiS
SMooihoekiteCu9Fe9S16
SPentlandite(NixFey)Σ9S8
SSperrylite var.PlatarsitePt(As,S)2
SPyriteFeS2
SPyrrhotiteFe1-xS
SSphaleriteZnS
SStibniteSb2S3
STetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
SViolariteFe2+Ni23+S4
SVysotskitePdS
SUM1986-51-S:ReRe2S3
ClChlorine
ClChlorapatiteCa5(PO4)3Cl
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
KMuscoviteKAl2(AlSi3O10)(OH)2
KPhlogopiteKMg3(AlSi3O10)(OH)2
KMuscovite var.SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
CaActinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
CaAnorthiteCa(Al2Si2O8)
CaAnorthite var.Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
CaCalciteCaCO3
CaChlorapatiteCa5(PO4)3Cl
CaEpidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
CaGrossularCa3Al2(SiO4)3
CaPigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
CaTitaniteCaTi(SiO4)O
CaTremolite◻Ca2Mg5(Si8O22)(OH)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
TiBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
TiIlmeniteFe2+TiO3
TiRutileTiO2
TiTitaniteCaTi(SiO4)O
CrChromium
CrChromiteFe2+Cr23+O4
CrHercynite var.Picotite(Fe,Mg)(Al,Cr)2O4
FeIron
FeActinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
FeArsenopyriteFeAsS
FeAlmandineFe32+Al2(SiO4)3
FeBiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeBorniteCu5FeS4
FePyrite var.Bravoite(Fe,Ni)S2
FeChalcopyriteCuFeS2
FeChromiteFe2+Cr23+O4
FeCubaniteCuFe2S3
FeEpidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
FeHematiteFe2O3
FeHercyniteFe2+Al2O4
FeIlmeniteFe2+TiO3
FeIsoferroplatinumPt3Fe
FeMackinawiteFeS
FeMagnetiteFe2+Fe23+O4
FeMarcasiteFeS2
FeMooihoekiteCu9Fe9S16
FeNontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
FePentlandite(NixFey)Σ9S8
FePigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
FePyriteFeS2
FePyrrhotiteFe1-xS
FeTulameenitePt2CuFe
FeViolariteFe2+Ni23+S4
FeEnstatite var.Bronzite(Mg,Fe2+)2[SiO3]2
FeFayalite-Forsterite Series
FeHercynite var.Picotite(Fe,Mg)(Al,Cr)2O4
CoCobalt
CoCarrolliteCuCo2S4
CoCobaltiteCoAsS
NiNickel
NiPyrite var.Bravoite(Fe,Ni)S2
NiGersdorffiteNiAsS
NiHeazlewooditeNi3S2
NiMilleriteNiS
NiNickelineNiAs
NiPentlandite(NixFey)Σ9S8
NiViolariteFe2+Ni23+S4
CuCopper
CuBorniteCu5FeS4
CuCarrolliteCuCo2S4
CuChalcopyriteCuFeS2
CuCovelliteCuS
CuCubaniteCuFe2S3
CuCupriteCu2O
CuNative CopperCu
CuMooihoekiteCu9Fe9S16
CuStannopalladinite(Pd,Cu)3Sn
CuTetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
CuTulameenitePt2CuFe
ZnZinc
ZnSphaleriteZnS
AsArsenic
AsArsenopalladinitePd8(As,Sb)3
AsArsenopyriteFeAsS
AsCobaltiteCoAsS
AsGersdorffiteNiAsS
AsHollingworthite(Rh,Pt,Pd)AsS
AsMertieitePd8Sb2.5As0.5
AsNickelineNiAs
AsPalarstanidePd5(Sn,As)2
AsPalladoarsenidePd2As
AsPalladobismutharsenidePd2(As,Bi)
AsSperrylite var.PlatarsitePt(As,S)2
AsSperrylitePtAs2
AsStillwateritePd8As3
ZrZirconium
ZrZirconZr(SiO4)
RuRuthenium
RuLauriteRuS2
RhRhodium
RhHollingworthite(Rh,Pt,Pd)AsS
RhNative Rhodium(Rh,Pt)
PdPalladium
PdArsenopalladinitePd8(As,Sb)3
PdAtokite(Pd,Pt)3Sn
PdBraggitePdPt3S4
PdHollingworthite(Rh,Pt,Pd)AsS
PdKeithconnitePd20Te7
PdKotulskitePd(Te,Bi)2-x (x ≈ 0.4)
PdMertieitePd8Sb2.5As0.5
PdMicheneritePdBiTe
PdPalarstanidePd5(Sn,As)2
PdNative Palladium(Pd,Pt)
PdPalladoarsenidePd2As
PdPalladobismutharsenidePd2(As,Bi)
PdPlumbopalladinitePd3Pb2
PdPotaritePdHg
PdRustenburgite(Pt,Pd)3Sn
PdStannopalladinite(Pd,Cu)3Sn
PdStillwateritePd8As3
PdTelluropalladinitePd9Te4
PdTelargpalite(Pd,Ag)3(Te,Bi)
PdTemagamitePd3HgTe3
PdVysotskitePdS
PdZvyagintsevitePd3Pb
PdNative Gold var.Palladium-bearing Gold(Au,Pd)
PdKojonenitePd7-xSnTe2 (0.3 ≤ x ≤ 0.8)
AgSilver
AgNative Gold var.Electrum(Au,Ag)
AgHessiteAg2Te
AgTelargpalite(Pd,Ag)3(Te,Bi)
SnTin
SnAtokite(Pd,Pt)3Sn
SnPalarstanidePd5(Sn,As)2
SnRustenburgite(Pt,Pd)3Sn
SnStannopalladinite(Pd,Cu)3Sn
SnKojonenitePd7-xSnTe2 (0.3 ≤ x ≤ 0.8)
SbAntimony
SbArsenopalladinitePd8(As,Sb)3
SbMertieitePd8Sb2.5As0.5
SbStibniteSb2S3
SbTetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
TeTellurium
TeHessiteAg2Te
TeKeithconnitePd20Te7
TeKotulskitePd(Te,Bi)2-x (x ≈ 0.4)
TeMicheneritePdBiTe
TeMoncheitePt(Te,Bi)2
TeTelluropalladinitePd9Te4
TeTelargpalite(Pd,Ag)3(Te,Bi)
TeTemagamitePd3HgTe3
TeKojonenitePd7-xSnTe2 (0.3 ≤ x ≤ 0.8)
ReRhenium
ReUM1986-51-S:ReRe2S3
PtPlatinum
PtAtokite(Pd,Pt)3Sn
PtBraggitePdPt3S4
PtCooperitePtS
PtHollingworthite(Rh,Pt,Pd)AsS
PtIsoferroplatinumPt3Fe
PtMoncheitePt(Te,Bi)2
PtNative Palladium(Pd,Pt)
PtSperrylite var.PlatarsitePt(As,S)2
PtNative PlatinumPt
PtNative Rhodium(Rh,Pt)
PtRustenburgite(Pt,Pd)3Sn
PtSperrylitePtAs2
PtTulameenitePt2CuFe
AuGold
AuNative Gold var.Electrum(Au,Ag)
AuNative GoldAu
AuNative Gold var.Palladium-bearing Gold(Au,Pd)
HgMercury
HgPotaritePdHg
HgTemagamitePd3HgTe3
PbLead
PbGalenaPbS
PbPlumbopalladinitePd3Pb2
PbZvyagintsevitePd3Pb
BiBismuth
BiKotulskitePd(Te,Bi)2-x (x ≈ 0.4)
BiMicheneritePdBiTe
BiMoncheitePt(Te,Bi)2
BiPalladobismutharsenidePd2(As,Bi)
BiTelargpalite(Pd,Ag)3(Te,Bi)

Fossils

There are 6 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.

Occurrences65
Youngest Fossil Listed66.0 Ma (Late/Upper Cretaceous)
Oldest Fossil Listed113 Ma (Early/Lower Cretaceous)
Stratigraphic Units
UnitNo. OccurrencesAge
Montana - Bearpaw Shale1272.1 - 66 Ma (Late/Upper Cretaceous)
Montana - Judith River5183.5 - 70.6 Ma (Late/Upper Cretaceous)
Fossils from RegionClick here to show the list.
Accepted NameHierarchyAge
Ammonoidea
order
Animalia :Mollusca :Cephalopoda :Ammonoidea83.5 - 70.6 Ma
Late/Upper Cretaceous
Scaphites
genus
Animalia :Mollusca :Cephalopoda :Ammonoidea :Scaphitidae :Scaphites83.5 - 70.6 Ma
Late/Upper Cretaceous
Bivalvia
class
Animalia :Mollusca :Bivalvia83.5 - 70.6 Ma
Late/Upper Cretaceous
Hybodus
genus
Animalia :Chordata :Chondrichthyes :Hybodontiformes :Hybodontidae :Hybodus83.5 - 70.6 Ma
Late/Upper Cretaceous
Odontaspis
genus
Animalia :Chordata :Elasmobranchii :Lamniformes :Odontaspididae :Odontaspis83.5 - 70.6 Ma
Late/Upper Cretaceous
Ischyrhiza
genus
Animalia :Chordata :Chondrichthyes :Sclerorhynchiformes :Sclerorhynchidae :Ischyrhiza83.5 - 70.6 Ma
Late/Upper Cretaceous
Protoplatyrhina
genus
Animalia :Chordata :Chondrichthyes :Rajiformes :Protoplatyrhina83.5 - 70.6 Ma
Late/Upper Cretaceous
Myledaphus
genus
Animalia :Chordata :Elasmobranchii :Rhinopristiformes :Rhinobatidae :Myledaphus83.5 - 70.6 Ma
Late/Upper Cretaceous
Acipenser
genus
Animalia :Chordata :Actinopteri :Acipenseriformes :Acipenseridae :Acipenser83.5 - 70.6 Ma
Late/Upper Cretaceous
Lepisosteus
genus
Animalia :Chordata :Actinopterygii :Lepisosteiformes :Lepisosteidae :Lepisosteus83.5 - 70.6 Ma
Late/Upper Cretaceous
Belonostomus
genus
Animalia :Chordata :Actinopteri :Aspidorhynchidae :Belonostomus83.5 - 70.6 Ma
Late/Upper Cretaceous
Paralbula
genus
Animalia :Chordata :Actinopteri :Elopiformes :Phyllodontidae :Paralbula83.5 - 70.6 Ma
Late/Upper Cretaceous
Crocodylia
unranked clade
Animalia :Chordata :Reptilia :Crocodylia83.5 - 70.6 Ma
Late/Upper Cretaceous
Opisthotriton
genus
Animalia :Chordata :Osteichthyes :Proteida :Batrachosauroididae :Opisthotriton83.5 - 70.6 Ma
Late/Upper Cretaceous
Scapherpeton
genus
Animalia :Chordata :Osteichthyes :Caudata :Scapherpetontidae :Scapherpeton83.5 - 70.6 Ma
Late/Upper Cretaceous
Boremys
genus
Animalia :Chordata :Reptilia :Testudines :Baenidae :Boremys83.5 - 70.6 Ma
Late/Upper Cretaceous
Champsosaurus
genus
Animalia :Chordata :Reptilia :Champsosauridae :Champsosaurus83.5 - 70.6 Ma
Late/Upper Cretaceous
Mosasauridae
family
Animalia :Chordata :Reptilia :Squamata :Mosasauridae83.5 - 70.6 Ma
Late/Upper Cretaceous
Theropoda
unranked clade
Animalia :Chordata :Saurischia :Theropoda83.5 - 70.6 Ma
Late/Upper Cretaceous
Hadrosauridae
family
Animalia :Chordata :Reptilia :Dinosauria :Hadrosauridae83.5 - 70.6 Ma
Late/Upper Cretaceous
Panoplosaurus
genus
Animalia :Chordata :Reptilia :Dinosauria :Nodosauridae :Panoplosaurus83.5 - 70.6 Ma
Late/Upper Cretaceous
Ankylosauridae
family
Animalia :Chordata :Reptilia :Dinosauria :Ankylosauridae83.5 - 70.6 Ma
Late/Upper Cretaceous
Ceratopsia
unranked clade
Animalia :Chordata :Ornithischia :Ceratopsia83.6 - 66 Ma
Late/Upper Cretaceous
Centrosaurus
genus
Animalia :Chordata :Reptilia :Dinosauria :Ceratopsidae :Centrosaurus83.5 - 70.6 Ma
Late/Upper Cretaceous
Cimexomys
genus
Animalia :Chordata :Mammalia :Taeniolabidae :Cimexomys83.5 - 70.6 Ma
Late/Upper Cretaceous
Mesodma
genus
Animalia :Chordata :Mammalia :Ptilodontidae :Mesodma83.5 - 70.6 Ma
Late/Upper Cretaceous
Meniscoessus
genus
Animalia :Chordata :Mammalia :Taeniolabididae :Meniscoessus83.5 - 70.6 Ma
Late/Upper Cretaceous
Cimolomys
genus
Animalia :Chordata :Mammalia :Cimolomyidae :Cimolomys83.5 - 70.6 Ma
Late/Upper Cretaceous
Alphadon
genus
Animalia :Chordata :Mammalia :Didelphimorphia :Didelphidae :Alphadon83.5 - 70.6 Ma
Late/Upper Cretaceous
Gypsonictops
genus
Animalia :Chordata :Mammalia :Pilosa :Gypsonictopidae :Gypsonictops83.5 - 70.6 Ma
Late/Upper Cretaceous
Gryposaurus
genus
Animalia :Chordata :Reptilia :Dinosauria :Hadrosauridae :Gryposaurus83.5 - 70.6 Ma
Late/Upper Cretaceous
Lambeosaurinae
subfamily
Animalia :Chordata :Ornithischia :Hadrosauridae :Lambeosaurinae83.5 - 70.6 Ma
Late/Upper Cretaceous
Dromaeosaurus albertensis
species
Animalia :Chordata :Reptilia :Dinosauria :Dromaeosauridae :Dromaeosaurus :Dromaeosaurus albertensis83.5 - 70.6 Ma
Late/Upper Cretaceous
Saurornitholestes langstoni
species
Animalia :Chordata :Saurischia :Avetheropoda :Dromaeosauridae :Saurornitholestes :Saurornitholestes langstoni83.5 - 70.6 Ma
Late/Upper Cretaceous
Troodon formosus
species
Animalia :Chordata :Saurischia :Avetheropoda :Troodontidae :Troodon :Troodon formosus83.5 - 70.6 Ma
Late/Upper Cretaceous
Sequoia
genus
Plantae :Tracheophyta :Pinopsida :Pinales :Cupressaceae :Sequoia83.5 - 70.6 Ma
Late/Upper Cretaceous
Trionychinae
unranked clade
Animalia :Chordata :Reptilia :Testudines :Trionychidae :Trionychinae83.5 - 70.6 Ma
Late/Upper Cretaceous
Anguioidea
superfamily
Animalia :Chordata :Reptilia :Squamata :Anguioidea83.5 - 70.6 Ma
Late/Upper Cretaceous
Richardoestesia gilmorei
species
Animalia :Chordata :Reptilia :Dinosauria :Dromaeosauridae :Richardoestesia :Richardoestesia gilmorei83.5 - 70.6 Ma
Late/Upper Cretaceous
Teleostei
unranked clade
Animalia :Chordata :Actinopteri :Teleostei83.5 - 70.6 Ma
Late/Upper Cretaceous
Eucrossorhinus
genus
Animalia :Chordata :Chondrichthyes :Orectolobiformes :Orectolobidae :Eucrossorhinus83.5 - 70.6 Ma
Late/Upper Cretaceous
Cyclurus
genus
Animalia :Chordata :Actinopteri :Amiiformes :Amiidae :Cyclurus83.5 - 70.6 Ma
Late/Upper Cretaceous
Squalicorax pristodontus
species
Animalia :Chordata :Chondrichthyes :Lamniformes :Anacoracidae :Squalicorax :Squalicorax pristodontus83.5 - 70.6 Ma
Late/Upper Cretaceous
Baculites compressus
species
Animalia :Mollusca :Cephalopoda :Ammonoidea :Baculitidae :Baculites :Baculites compressus83.5 - 70.6 Ma
Late/Upper Cretaceous
Rhaeboceras halli
species
Animalia :Mollusca :Cephalopoda :Ammonitida :Scaphitidae :Rhaeboceras :Rhaeboceras halli83.5 - 70.6 Ma
Late/Upper Cretaceous
Metatheria
subclass
Animalia :Chordata :Mammalia :Metatheria83.5 - 70.6 Ma
Late/Upper Cretaceous
Labrodioctes montanensis
species
Animalia :Chordata :Reptilia :Squamata :Necrosauridae :Labrodioctes :Labrodioctes montanensis83.5 - 70.6 Ma
Late/Upper Cretaceous
Pediomyidae
unranked clade
Animalia :Chordata :Mammalia :Pediomyidae83.5 - 70.6 Ma
Late/Upper Cretaceous
Axestemys splendidus
species
Animalia :Chordata :Reptilia :Testudines :Trionychidae :Axestemys :Axestemys splendidus83.5 - 70.6 Ma
Late/Upper Cretaceous
Carinalestes murensis
species
Animalia :Chordata :Mammalia :Carinalestes :Carinalestes murensis113 - 100.5 Ma
Early/Lower Cretaceous
Fossil LocalitiesClick to show 6 fossil localities

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Stillwater_County,_Montana
Wikidata ID:Q490750
GeoNames ID:5680538

Localities in this Region

Other Regions, Features and Areas that Intersect

North America Plate
USA

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