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Cliff mine, Phoenix, Keweenaw Co., Michigan, USA

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Poor rock piles of the Cliff Mine, near Phoenix, Michigan

Cliff mine, Phoenix, Keweenaw Co., Michigan, USA
Cliff Mine, Oldest Mine on Lake Superior

Cliff mine, Phoenix, Keweenaw Co., Michigan, USA
Poor rock piles of the Cliff Mine, near Phoenix, Michigan

Cliff mine, Phoenix, Keweenaw Co., Michigan, USA
Cliff Mine, Oldest Mine on Lake Superior

Cliff mine, Phoenix, Keweenaw Co., Michigan, USA
Poor rock piles of the Cliff Mine, near Phoenix, Michigan

Cliff mine, Phoenix, Keweenaw Co., Michigan, USA
Latitude & Longitude (WGS84): 47° 22' 22'' North , 88° 18' 47'' West
Latitude & Longitude (decimal): 47.37291,-88.31312
GeoHash:G#: f03jqrur5
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate


A copper mine started 1845.

Regions containing this locality

Keweenaw Peninsula, Michigan, USA

Peninsula - 239 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

40 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Albite
Formula: Na(AlSi3O8)
Reference: R&M 71:6 p381-390
Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121; Rocks & Minerals 84:298-323
Anhydrite
Formula: CaSO4
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
'Apophyllite'
Reference: Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: R&M 71:6 p381-390
Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Reference: R&M 71:6 p381-390
Baryte
Formula: BaSO4
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Rocks & Minerals 71:6 p381-390; Rocks & Minerals 84:298-323
Calcite
Formula: CaCO3
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121; Rocks & Minerals 84:298-323; Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Chalcocite
Formula: Cu2S
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.; Rocks & Minerals 84:298-323.
Chalcopyrite
Formula: CuFeS2
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.
Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Reference: R&M 71:6 p381-390
'Chlorite Group'
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.; Rocks & Minerals 84:298-323.; Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: R&M 71:6 p381-390
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Copper
Formula: Cu
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.; Rocks & Minerals 84:298-323.; Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Covellite
Formula: CuS
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.
Cuprite
Formula: Cu2O
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.
Datolite
Formula: CaB(SiO4)(OH)
Reference: Dana 6:201,373 & 1086; Rocks & Min.: 58:111 & 121.; Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
'Delessite'
Formula: (Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Digenite
Formula: Cu9S5
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.
Domeykite
Formula: Cu3As
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121; Rocks & Minerals 84:298-323; Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson; Rocks & Minerals 84:298-323.
Galena
Formula: PbS
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Hematite
Formula: Fe2O3
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.
Ilmenite
Formula: Fe2+TiO3
Reference: Justin Bank Collection
'K Feldspar'
Reference: Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Rocks & Minerals 71:6 p381-390; Rocks & Minerals 84:298-323; Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Microcline
Formula: K(AlSi3O8)
Reference: R&M 71:6 p381-390
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: R&M 71:6 p381-390
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson; Rocks & Minerals 84:298-323.; Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
'Pumpellyite'
Pumpellyite-(Mg)
Formula: Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Reference: (in part): Rocks & Min.:56:248.
Pumpellyite-(Mg) var: Chlorastrolite
Formula: Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Reference: Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Pyrite
Formula: FeS2
Reference: R&M 71:6 p381-390
Quartz
Formula: SiO2
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121; Rocks & Minerals 84:298-323
Silver
Formula: Ag
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Mineralogy of Michigan (2004) Heinrich & Robinson; Rocks & Minerals 84:298-323; Bornhorst, T. J., & Barron, R. J. (2011). Copper deposits of the western Upper Peninsula of Michigan. The Geological Society of America Field Guide 24, 83-99.
Sphalerite
Formula: ZnS
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.
Tenorite
Formula: CuO
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.
Wollastonite
Formula: CaSiO3
Reference: Dana 6:201,373 & 1086; Rocks & Min.:58:111 & 121.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
'Acanthite'2.BA.35Ag2S
'Chalcocite'2.BA.05Cu2S
'Chalcopyrite'2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Digenite2.BA.10Cu9S5
Domeykite2.AA.10bCu3As
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Tenorite4.AB.10CuO
Group 5 - Nitrates and Carbonates
'Ankerite'5.AB.10Ca(Fe2+,Mg)(CO3)2
'Azurite'5.BA.05Cu3(CO3)2(OH)2
'Calcite'5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anhydrite'7.AD.30CaSO4
'Baryte'7.AD.35BaSO4
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
'Analcime'9.GB.05Na(AlSi2O6) · H2O
'Babingtonite'9.DK.05Ca2(Fe,Mn)FeSi5O14(OH)
'Chamosite'9.EC.55(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fluorapophyllite-(K)9.EA.15KCa4(Si8O20)(F,OH) · 8H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Microcline9.FA.30K(AlSi3O8)
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Pumpellyite-(Mg)9.BG.20Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
var: Chlorastrolite9.BG.20Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Thomsonite-Ca9.GA.10NaCa2[Al5Si5O20] · 6H2O
Wollastonite9.DG.05CaSiO3
Unclassified Minerals, Rocks, etc.
'Apophyllite'-
Chlorite Group-
Delessite-(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
K Feldspar-
'var: Adularia'-KAlSi3O8
Pumpellyite-

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
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 3:1
Domeykite2.2.2.1Cu3As
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
Chalcocite2.4.7.1Cu2S
Digenite2.4.7.3Cu9S5
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
AX
Tenorite4.2.3.1CuO
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anhydrite28.3.2.1CaSO4
Baryte28.3.1.1BaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(OH)
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)
Pumpellyite-(Mg)58.2.2.7Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=3
Wollastonite65.2.1.1cCaSiO3
Single-Width Unbranched Chains, W=1 with chains P=5
Babingtonite65.4.1.2Ca2(Fe,Mn)FeSi5O14(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Chamosite71.4.1.7(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
Fluorapophyllite-(K)72.3.1.1KCa4(Si8O20)(F,OH) · 8H2O
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · 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)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Rocks, etc.
'Apophyllite'-
'Chlorite Group'-
'Delessite'-(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Pumpellyite'-
Pumpellyite-(Mg)
var: Chlorastrolite
-Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Thomsonite-Ca-NaCa2[Al5Si5O20] · 6H2O

List of minerals for each chemical element

HHydrogen
H AnalcimeNa(AlSi2O6) · H2O
H AzuriteCu3(CO3)2(OH)2
H BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
H Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
H Pumpellyite-(Mg) (var: Chlorastrolite)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H ClinochloreMg5Al(AlSi3O10)(OH)8
H DatoliteCaB(SiO4)(OH)
H Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
H GypsumCaSO4 · 2H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H MalachiteCu2(CO3)(OH)2
H NatroliteNa2Al2Si3O10 · 2H2O
H PrehniteCa2Al2Si3O10(OH)2
H Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
H Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C AzuriteCu3(CO3)2(OH)2
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O K Feldspar (var: Adularia)KAlSi3O8
O AlbiteNa(AlSi3O8)
O AnalcimeNa(AlSi2O6) · H2O
O AnhydriteCaSO4
O AnkeriteCa(Fe2+,Mg)(CO3)2
O AzuriteCu3(CO3)2(OH)2
O BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
O BaryteBaSO4
O CalciteCaCO3
O Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
O Pumpellyite-(Mg) (var: Chlorastrolite)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O ClinochloreMg5Al(AlSi3O10)(OH)8
O CupriteCu2O
O DatoliteCaB(SiO4)(OH)
O Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O IlmeniteFe2+TiO3
O LaumontiteCaAl2Si4O12 · 4H2O
O MagnetiteFe2+Fe23+O4
O MalachiteCu2(CO3)(OH)2
O MicroclineK(AlSi3O8)
O NatroliteNa2Al2Si3O10 · 2H2O
O PrehniteCa2Al2Si3O10(OH)2
O Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
O QuartzSiO2
O TenoriteCuO
O Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
O WollastoniteCaSiO3
FFluorine
F Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
NaSodium
Na AlbiteNa(AlSi3O8)
Na AnalcimeNa(AlSi2O6) · H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Mg Pumpellyite-(Mg) (var: Chlorastrolite)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Mg Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
Al AlbiteNa(AlSi3O8)
Al AnalcimeNa(AlSi2O6) · H2O
Al Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Al Pumpellyite-(Mg) (var: Chlorastrolite)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al MicroclineK(AlSi3O8)
Al NatroliteNa2Al2Si3O10 · 2H2O
Al PrehniteCa2Al2Si3O10(OH)2
Al Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Al Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
SiSilicon
Si K Feldspar (var: Adularia)KAlSi3O8
Si AlbiteNa(AlSi3O8)
Si AnalcimeNa(AlSi2O6) · H2O
Si BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Si Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Si Pumpellyite-(Mg) (var: Chlorastrolite)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si DatoliteCaB(SiO4)(OH)
Si Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Si LaumontiteCaAl2Si4O12 · 4H2O
Si MicroclineK(AlSi3O8)
Si NatroliteNa2Al2Si3O10 · 2H2O
Si PrehniteCa2Al2Si3O10(OH)2
Si Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Si QuartzSiO2
Si Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Si WollastoniteCaSiO3
SSulfur
S AcanthiteAg2S
S AnhydriteCaSO4
S BaryteBaSO4
S ChalcociteCu2S
S ChalcopyriteCuFeS2
S CovelliteCuS
S DigeniteCu9S5
S GalenaPbS
S GypsumCaSO4 · 2H2O
S PyriteFeS2
S SphaleriteZnS
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
K Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
K MicroclineK(AlSi3O8)
CaCalcium
Ca AnhydriteCaSO4
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Ca CalciteCaCO3
Ca Pumpellyite-(Mg) (var: Chlorastrolite)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Ca DatoliteCaB(SiO4)(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Ca GypsumCaSO4 · 2H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca PrehniteCa2Al2Si3O10(OH)2
Ca Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Ca Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Ca WollastoniteCaSiO3
TiTitanium
Ti IlmeniteFe2+TiO3
MnManganese
Mn BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
FeIron
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Fe ChalcopyriteCuFeS2
Fe Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Fe Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2
CuCopper
Cu AzuriteCu3(CO3)2(OH)2
Cu ChalcociteCu2S
Cu ChalcopyriteCuFeS2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu CopperCu
Cu CovelliteCuS
Cu CupriteCu2O
Cu DigeniteCu9S5
Cu DomeykiteCu3As
Cu MalachiteCu2(CO3)(OH)2
Cu TenoriteCuO
ZnZinc
Zn SphaleriteZnS
AsArsenic
As DomeykiteCu3As
AgSilver
Ag AcanthiteAg2S
Ag SilverAg
BaBarium
Ba BaryteBaSO4
PbLead
Pb GalenaPbS

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

Stenian
1000 - 1200 Ma



ID: 2928161
Portage Lake Volcanics

Age: Stenian (1000 - 1200 Ma)

Stratigraphic Name: Portage Lake Volcanics

Description: Lava flows, mostly basalt, andesite and felsite flows and subordinate interflow sedimentary rocks.

Comments: This unit is the same as unit Yp on paper map of Sims (1992). Description is taken from that unit description. Original map source: Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, Joyce, and Barber-Delach, Robert, 1997, Digital Geologic Map and mineral deposits of the Lake Superior Region, Minnesota, Wisconsin, Michigan: USGS Open-File Report 97-455 (version 3, Nov. 19

Lithology: Major:{basalt}, Minor:{basaltic andesite}, Incidental:{rhyolite, sandstone mudstone}

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]

Stenian
1000 - 1200 Ma



ID: 3184728
Mesoproterozoic volcanic rocks

Age: Stenian (1000 - 1200 Ma)

Comments: Mid-Continent Rift

Lithology: Bimodal volcanic rocks

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)
Henwood, W.J. (1871): Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1), 385-489.
Dana 6:201,373 & 1086
Rocks & Minerals:56:248, 58:111 & 58:121.

Localities in this Region
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USA

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