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Cuyuna North Range, Crow Wing Co., Minnesota, USAi
Regional Level Types
Cuyuna North RangeMountain Range
Crow Wing Co.County
MinnesotaState
USACountry

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Key
Latitude & Longitude (WGS84):
46° 22' North , 94° 10' West
Latitude & Longitude (decimal):
Locality type:


District consists of a semicircular area 5 miles in diameter north-northwest of Ironton, Minnesota. The ores are typical banded iron formation that have been metamorphosed and later concentrated into both brown and red hematite ore. Some of the mines also contain significant manganese mineralization. Ores have been mined both by underground methods as well as by open pit mining. The open pits are now filled by lakes. Best reference is USGS Professional Paper 407 "Geology and Ore Deposits of the Cuyuna North Range, Minnesota"

Select Mineral List Type

Standard Detailed Strunz Dana 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

33 valid minerals. 2 (TL) - type locality of 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!

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Aegirine
Formula: NaFe3+Si2O6
Reference: USGS Prof Paper 407
Albite
Formula: Na(AlSi3O8)
Reference: USGS Prof Paper 407
'Albite-Anorthite Series'
Reference: Grout, F.F. (1946): Acmite occurences on the Cuyuna Range, Minnesota. American Mineralogist. 31: 125-130
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Am Min 50:148-169
Aragonite
Formula: CaCO3
Arsenopyrite
Formula: FeAsS
Reference: Am Min 50:148-169
Baryte
Formula: BaSO4
Calcite
Formula: CaCO3
Chalcopyrite
Formula: CuFeS2
Reference: Institute on Lake Superior Geology Proceedings, 40th Annual Meeting, Houghton, MI, v. 40, part 4,
'Chlorite Group'
Cryptomelane
Formula: K(Mn4+7Mn3+)O16
Diopside
Formula: CaMgSi2O6
Reference: USGS Prof Paper 407
Enstatite
Formula: Mg2Si2O6
Description: silicic enstatite
Reference: Grout, F.F. (1946): Acmite occurences on the Cuyuna Range, Minnesota. American Mineralogist. 31: 125-130
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: USGS Prof Paper 407
Galena
Formula: PbS
Reference: USGS Prof Paper 407
Goethite
Formula: α-Fe3+O(OH)
Localities: Reported from at least 13 localities in this region.
Groutite (TL)
Formula: Mn3+O(OH)
Reference: Amer.Min.(1945) 30, 169
Grunerite
Formula: ☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Hematite
Formula: Fe2O3
Localities: Reported from at least 90 localities in this region.
Hematite var: Martite
Formula: Fe2O3
Reference: Institute on Lake Superior Geology Proceedings, 40th Annual Meeting, Houghton, MI, v. 40, part 4,
'K Feldspar'
Reference: USGS Prof Paper 407
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: USGS Prof Paper 407
Kutnohorite
Formula: CaMn2+(CO3)2
'Limonite'
Formula: (Fe,O,OH,H2O)
Magnesio-riebeckite
Formula: ◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2
Reference: McSwiggen, P. L., Morey, G. B., & Cleland, J. M. (1994). Occurrence and genetic implications of hyalophane in manganese-rich iron-formation, Cuyuna Iron Range, Minnesota, USA. Mineralogical Magazine, 58(392), 387-400.
Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 84 localities in this region.
Manganite
Formula: Mn3+O(OH)
Microcline
Formula: K(AlSi3O8)
Reference: USGS Prof Paper 407
Microcline var: Hyalophane
Formula: (K,Ba)[Al(Si,Al)Si2O8]
Reference: McSwiggen, P. L., Morey, G. B., & Cleland, J. M. (1994). Occurrence and genetic implications of hyalophane in manganese-rich iron-formation, Cuyuna Iron Range, Minnesota, USA. Mineralogical Magazine, 58(392), 387-400.
Minnesotaite (TL)
Formula: Fe2+3Si4O10(OH)2
Reference: Blake, R.L. (1965) Iron phyllosilicates of the cuyuna district in Minnesota. American Mineralogist: 50: 148-169.; Guggenheim, Stephen and Bailey, S.W. (1983) The superlattice of minnesotaite. The Canadian Mineralogist: 20(4): 579-584.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Reference: USGS Prof Paper 407
'Psilomelane'
Formula: Mn, O
Reference: USGS Prof Paper 407
Pyrite
Formula: FeS2
Pyrolusite
Formula: Mn4+O2
Pyrrhotite
Formula: Fe1-xS
Reference: Institute on Lake Superior Geology Proceedings, 40th Annual Meeting, Houghton, MI, v. 40, part 4,
Quartz
Formula: SiO2
Localities: Reported from at least 14 localities in this region.
Quartz var: Binghamite
Formula: SiO2
Reference: [www.wmnh.com]
Quartz var: Chalcedony
Formula: SiO2
Reference: [www.wmnh.com]
Rhodochrosite
Formula: MnCO3
Reference: USGS Prof Paper 407
Rhodonite
Formula: Mn2+SiO3
Reference: McSwiggen, P. L., Morey, G. B., & Cleland, J. M. (1994). Occurrence and genetic implications of hyalophane in manganese-rich iron-formation, Cuyuna Iron Range, Minnesota, USA. Mineralogical Magazine, 58(392), 387-400.
Siderite
Formula: FeCO3
Localities: Reported from at least 12 localities in this region.
Siderite var: Manganoan Siderite
Formula: (Fe,Mn)CO3
Reference: Grout, F.F. (1946): Acmite occurences on the Cuyuna Range, Minnesota. American Mineralogist. 31: 125-130
Stilpnomelane
Formula: (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Localities: Reported from at least 10 localities in this region.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe1-xS
Group 4 - Oxides and Hydroxides
Cryptomelane4.DK.05aK(Mn4+7Mn3+)O16
Goethite4.00.α-Fe3+O(OH)
Groutite (TL)4.FD.10Mn3+O(OH)
Hematite4.CB.05Fe2O3
var: Martite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Manganite4.FD.15Mn3+O(OH)
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
var: Binghamite4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Calcite5.AB.05CaCO3
Kutnohorite5.AB.10CaMn2+(CO3)2
Rhodochrosite5.AB.05MnCO3
Siderite5.AB.05FeCO3
var: Manganoan Siderite5.AB.05(Fe,Mn)CO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 9 - Silicates
Aegirine9.DA.25NaFe3+Si2O6
Albite9.FA.35Na(AlSi3O8)
Diopside9.DA.15CaMgSi2O6
Enstatite9.DA.05Mg2Si2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Grunerite9.DE.05☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Magnesio-riebeckite9.DE.25◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2
Microcline9.FA.30K(AlSi3O8)
var: Hyalophane9.FA.30(K,Ba)[Al(Si,Al)Si2O8]
Minnesotaite (TL)9.EC.05Fe2+3Si4O10(OH)2
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Nontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Rhodonite9.DK.05Mn2+SiO3
Stilpnomelane9.EG.40(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Chlorite Group'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
'Psilomelane'-Mn, O
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe1-xS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Groutite (TL)6.1.1.3Mn3+O(OH)
Manganite6.1.3.1Mn3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
AB8X16
Cryptomelane7.9.1.2K(Mn4+7Mn3+)O16
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
Siderite14.1.1.3FeCO3
AB(XO3)2
Kutnohorite14.2.1.3CaMn2+(CO3)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
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)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Aegirine65.1.3c.2NaFe3+Si2O6
Diopside65.1.3a.1CaMgSi2O6
Enstatite65.1.2.1Mg2Si2O6
Single-Width Unbranched Chains, W=1 with chains P=5
Rhodonite65.4.1.1Mn2+SiO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Minnesotaite (TL)71.2.1.5Fe2+3Si4O10(OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Sheets of 6-membered rings with 2:1 clays
Nontronite71.3.1a.3Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined islands
Stilpnomelane74.1.1.1(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
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)
var: Hyalophane76.1.1.3(K,Ba)[Al(Si,Al)Si2O8]
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Aragonite-CaCO3
'Chlorite Group'-
Grunerite-☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Hematite
var: Martite
-Fe2O3
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
Magnesio-riebeckite-◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Psilomelane'-Mn, O
Quartz
var: Binghamite
-SiO2
var: Chalcedony-SiO2
Siderite
var: Manganoan Siderite
-(Fe,Mn)CO3
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H MinnesotaiteFe32+Si4O10(OH)2
H GroutiteMn3+O(OH)
H Goethiteα-Fe3+O(OH)
H Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
H ManganiteMn3+O(OH)
H Limonite(Fe,O,OH,H2O)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
H NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H Magnesio-riebeckite◻{Na2}{Mg3Fe23+}(Si8O22)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
CCarbon
C SideriteFeCO3
C CalciteCaCO3
C RhodochrositeMnCO3
C Siderite (var: Manganoan Siderite)(Fe,Mn)CO3
C AragoniteCaCO3
C KutnohoriteCaMn2+(CO3)2
OOxygen
O MinnesotaiteFe32+Si4O10(OH)2
O GroutiteMn3+O(OH)
O PyrolusiteMn4+O2
O Quartz (var: Binghamite)SiO2
O Goethiteα-Fe3+O(OH)
O Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
O ManganiteMn3+O(OH)
O QuartzSiO2
O HematiteFe2O3
O CryptomelaneK(Mn74+Mn3+)O16
O MagnetiteFe2+Fe23+O4
O Limonite(Fe,O,OH,H2O)
O SideriteFeCO3
O CalciteCaCO3
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O PsilomelaneMn, O
O Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
O BaryteBaSO4
O NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
O RhodochrositeMnCO3
O MicroclineK(AlSi3O8)
O AegirineNaFe3+Si2O6
O AlbiteNa(AlSi3O8)
O K Feldspar (var: Adularia)KAlSi3O8
O DiopsideCaMgSi2O6
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Siderite (var: Manganoan Siderite)(Fe,Mn)CO3
O EnstatiteMg2Si2O6
O Hematite (var: Martite)Fe2O3
O AragoniteCaCO3
O KutnohoriteCaMn2+(CO3)2
O Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
O RhodoniteMn2+SiO3
O Magnesio-riebeckite◻{Na2}{Mg3Fe23+}(Si8O22)(OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O Quartz (var: Chalcedony)SiO2
FFluorine
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
NaSodium
Na Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Na NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Na AegirineNaFe3+Si2O6
Na AlbiteNa(AlSi3O8)
Na Magnesio-riebeckite◻{Na2}{Mg3Fe23+}(Si8O22)(OH)2
MgMagnesium
Mg Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Mg DiopsideCaMgSi2O6
Mg EnstatiteMg2Si2O6
Mg Magnesio-riebeckite◻{Na2}{Mg3Fe23+}(Si8O22)(OH)2
AlAluminium
Al Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Al MicroclineK(AlSi3O8)
Al AlbiteNa(AlSi3O8)
Al K Feldspar (var: Adularia)KAlSi3O8
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si MinnesotaiteFe32+Si4O10(OH)2
Si Quartz (var: Binghamite)SiO2
Si Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Si QuartzSiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Si NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Si MicroclineK(AlSi3O8)
Si AegirineNaFe3+Si2O6
Si AlbiteNa(AlSi3O8)
Si K Feldspar (var: Adularia)KAlSi3O8
Si DiopsideCaMgSi2O6
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si EnstatiteMg2Si2O6
Si Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
Si RhodoniteMn2+SiO3
Si Magnesio-riebeckite◻{Na2}{Mg3Fe23+}(Si8O22)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Quartz (var: Chalcedony)SiO2
SSulfur
S PyriteFeS2
S GalenaPbS
S BaryteBaSO4
S ArsenopyriteFeAsS
S PyrrhotiteFe1-xS
S ChalcopyriteCuFeS2
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
K CryptomelaneK(Mn74+Mn3+)O16
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MicroclineK(AlSi3O8)
K K Feldspar (var: Adularia)KAlSi3O8
K Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca DiopsideCaMgSi2O6
Ca AragoniteCaCO3
Ca KutnohoriteCaMn2+(CO3)2
TiTitanium
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MnManganese
Mn GroutiteMn3+O(OH)
Mn PyrolusiteMn4+O2
Mn ManganiteMn3+O(OH)
Mn CryptomelaneK(Mn74+Mn3+)O16
Mn PsilomelaneMn, O
Mn RhodochrositeMnCO3
Mn Siderite (var: Manganoan Siderite)(Fe,Mn)CO3
Mn KutnohoriteCaMn2+(CO3)2
Mn RhodoniteMn2+SiO3
FeIron
Fe MinnesotaiteFe32+Si4O10(OH)2
Fe Goethiteα-Fe3+O(OH)
Fe Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Fe HematiteFe2O3
Fe PyriteFeS2
Fe MagnetiteFe2+Fe23+O4
Fe Limonite(Fe,O,OH,H2O)
Fe SideriteFeCO3
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Fe NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Fe AegirineNaFe3+Si2O6
Fe ArsenopyriteFeAsS
Fe Siderite (var: Manganoan Siderite)(Fe,Mn)CO3
Fe PyrrhotiteFe1-xS
Fe ChalcopyriteCuFeS2
Fe Hematite (var: Martite)Fe2O3
Fe Magnesio-riebeckite◻{Na2}{Mg3Fe23+}(Si8O22)(OH)2
CuCopper
Cu ChalcopyriteCuFeS2
AsArsenic
As ArsenopyriteFeAsS
BaBarium
Ba BaryteBaSO4
Ba Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Schmidt, R.G. & C.E. Dutton (1957) Bedrock Geology of the south-central part of the North Range, Cuyuna District, Minnesota: U.S. Geological Survey Mineral Investigations Field Studies Map MF 99, 3 sheets.
Schmidt, R.G. (1958) Bedrock geology of the northern and eastern part of the North Range, Cuyuna district, Minnesota: U.S. Geological Survey Mineral Investigations Field Studies Map MF 182 5 sheets.
Schmidt, R.G. (1958) Bedrock geology of the southwestern part of the North Range, Cuyuna district, Minnesota: U.S. Geological Survey Mineral Investigations Field Studies Map MF 181, 3 sheets.
Schmidt, R.G. (1963) Geology and ore deposits of the Cuyuna North Range, Minnesota: U.S. Geological Survey Professional Paper 407, 96 p.
McSwiggen, P. L., Morey, G. B., & Cleland, J. M. (1994). Occurrence and genetic implications of hyalophane in manganese-rich iron-formation, Cuyuna Iron Range, Minnesota, USA. Mineralogical Magazine, 58(392), 387-400.
McSwiggen, P. L., Morey, G. B., & Cleland, J. M. (1995). Iron-Formation Protolith and Genesis, Cuyuna Range, Minnesota. Minnesota Geological Survey RI-45
Cleland, J. M., Morey, G. B., & McSwiggen, P. L. (1996). Significance of tourmaline-rich rocks in the North Range Group of the Cuyuna Iron Range, east-central Minnesota. Economic Geology, 91(7), 1282-1291.

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