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Mohawk Mine, Mohawk, Keweenaw Co., Michigan, USA

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Latitude & Longitude (WGS84): 47° 18' 29'' North , 88° 21' 20'' West
Latitude & Longitude (decimal): 47.30806,-88.35556
GeoHash:G#: f03jjkjmq
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate


A copper mine located at Mohawk (headframe hamlet), approximately 6 miles north of Calumet on the east side of Route 41.

The Mohawk Mining Co. was incorporated in 1898 with Joseph Gay as president, after lumberman Ernest Koch found copper on the property in 1896. It is best known to collectors for the occurrence of mohawkite (a mixture of algodonite, domeykite, and copper). The mine also produced a large amount of native silver, especially in the upper levels. In 1923 the Mohawk Mining Co. took over the Wolverine Copper Mining Co. and the Michigan Copper Mining Co.


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

42 valid minerals.

Detailed Mineral List:

Algodonite
Formula: (Cu1-xAsx)
Reference: Mineralogical Record - Vol 23 No. 2; Rocks & Min.: 21:664.
Analcime
Formula: Na(AlSi2O6) · H2O
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Rocks & Min.: 58:111.
Annabergite
Formula: Ni3(AsO4)2 · 8H2O
Reference: [Mineralogical Record - Vol 23 No. 2]
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Calcite
Formula: CaCO3
Reference: Rocks & Min.: 21:664; 58:111.
Chalcocite
Formula: Cu2S
Reference: Rocks & Minerals 82:276-297
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Copper
Formula: Cu
Reference: Mineralogical Record - 23 No. 2; Rocks & Min.: 21:664.
Cuprite
Formula: Cu2O
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Datolite
Formula: CaB(SiO4)(OH)
Dolomite
Formula: CaMg(CO3)2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Domeykite
Formula: Cu3As
Reference: Rocks & Min.: 21:664.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Rocks & Min.: 58:111.
Erythrite
Formula: Co3(AsO4)2 · 8H2O
Reference: [Mineralogical Record - Vol 23 No. 2]
Guérinite
Formula: Ca5(AsO4)2(HAsO4)2 · 9H2O
Reference: [Mineralogical Record - Vol 23 No. 2]
Gypsum
Formula: CaSO4 · 2H2O
Reference: Rocks & Min.: 58:111.
Hematite
Formula: Fe2O3
Kamiokite
Formula: Fe2Mo3O8
Reference: American Mineralogist,Volume 68, pages1038-1041 1983
'K Feldspar'
Koutekite
Formula: Cu5As2
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Rocks & Min.: 58:111.
Lavendulan
Formula: NaCaCu5(AsO4)4Cl · 5H2O
Reference: [Mineralogical Record - Vol 23 No. 2]
Maucherite
Formula: Ni11As8
Reference: [Mineralogical Record - Vol 23 No. 2]
Microcline
Formula: K(AlSi3O8)
Reference: Rocks & Min.: 58:111.
'Mohawkite'
Reference: Rocks & Min.: 21:664.
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Nickeline
Formula: NiAs
Reference: [Mineralogical Record - Vol 23 No. 2]
Nickelskutterudite
Formula: (Ni,Co,Fe)As3
Reference: [Mineralogical Record - Vol 23 No. 2]
Olivenite
Formula: Cu2(AsO4)(OH)
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Pararammelsbergite
Formula: NiAs2
Reference: [Mineralogical Record - Vol 23 No. 2]
Paratacamite
Formula: Cu3(Cu,Zn)(OH)6Cl2
Paxite
Formula: CuAs2
Reference: Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Pharmacolite
Formula: Ca(HAsO4) · 2H2O
Reference: [Mineralogical Record - Vol 23 No. 2]
Picropharmacolite
Formula: Ca4Mg(AsO4)2(HAsO4)2 · 11H2O
Reference: [Mineralogical Record - Vol 23 No. 2]
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Rocks & Min.: 21:664.
Quartz
Formula: SiO2
Reference: Rocks & Min.: 21:664; 58:111.
Rammelsbergite
Formula: NiAs2
Reference: [MinRec - 23:Michigan 68] Heinrich, E.W., and Robinson, G. W., 2004, Mineralogy of Michigan, 2nd Ed.
Rauenthalite
Formula: Ca3(AsO4)2 · 10H2O
Reference: [Mineralogical Record - Vol 23 No. 2]
Sainfeldite
Formula: Ca5(AsO4)2(AsO3OH)2 · 4H2O
Reference: www.excaliburmineral.com/mins-z.htm
Silver
Formula: Ag
Reference: Rocks & Min.: 21:664.
Skutterudite
Formula: CoAs3
Reference: [Mineralogical Record - Vol 23 No. 2]
Tyrolite
Formula: Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Reference: [Mineralogical Record - Vol 23 No. 2]
Vladimirite
Formula: Ca4(AsO4)2(AsO3OH) · 4H2O
Reference: [Mineralogical Record - Vol 23 No. 2]

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Copper'1.AA.05Cu
'Silver'1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
'Algodonite'2.AA.10a(Cu1-xAsx)
'Chalcocite'2.BA.05Cu2S
'Domeykite'2.AA.10bCu3As
'Koutekite'2.AA.10dCu5As2
'Maucherite'2.AB.15Ni11As8
'Nickeline'2.CC.05NiAs
'Nickelskutterudite'2.EC.05(Ni,Co,Fe)As3
'Pararammelsbergite'2.EB.10eNiAs2
'Paxite'2.EB.15cCuAs2
'Rammelsbergite'2.EB.15aNiAs2
'Skutterudite'2.EC.05CoAs3
Group 3 - Halides
'Paratacamite'3.DA.10cCu3(Cu,Zn)(OH)6Cl2
Group 4 - Oxides and Hydroxides
'Cuprite'4.AA.10Cu2O
'Hematite'4.CB.05Fe2O3
'Kamiokite'4.CB.40Fe2Mo3O8
'Quartz'4.DA.05SiO2
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
'Dolomite'5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Gypsum'7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
'Annabergite'8.CE.40Ni3(AsO4)2 · 8H2O
'Erythrite'8.CE.40Co3(AsO4)2 · 8H2O
'Guérinite'8.CJ.75Ca5(AsO4)2(HAsO4)2 · 9H2O
'Lavendulan'8.DG.05NaCaCu5(AsO4)4Cl · 5H2O
'Olivenite'8.BB.30Cu2(AsO4)(OH)
'Pharmacolite'8.CJ.50Ca(HAsO4) · 2H2O
'Picropharmacolite'8.CH.15Ca4Mg(AsO4)2(HAsO4)2 · 11H2O
'Rauenthalite'8.CJ.40Ca3(AsO4)2 · 10H2O
'Sainfeldite'8.CB.10Ca5(AsO4)2(AsO3OH)2 · 4H2O
'Tyrolite'8.DM.10Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
'Vladimirite'8.CJ.25Ca4(AsO4)2(AsO3OH) · 4H2O
Group 9 - Silicates
'Analcime'9.GB.05Na(AlSi2O6) · H2O
'Chrysocolla'9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
'Datolite'9.AJ.20CaB(SiO4)(OH)
'Epidote'9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
'Laumontite'9.GB.10CaAl2Si4O12 · 4H2O
'Microcline'9.FA.30K(AlSi3O8)
'Natrolite'9.GA.05Na2Al2Si3O10 · 2H2O
'Prehnite'9.DP.20Ca2Al2Si3O10(OH)2
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'Mohawkite'-

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
AmXp, with m:p > 3:1
Algodonite2.1.1.1(Cu1-xAsx)
AmBnXp, with (m+n):p = 3:1
Domeykite2.2.2.1Cu3As
AmBnXp, with (m+n):p = 5:2
Koutekite2.3.1.1Cu5As2
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmXp, with m:p = 1:1
Nickeline2.8.11.1NiAs
AmBnXp, with (m+n):p = 1:2
Nickelskutterudite2.12.17.2(Ni,Co,Fe)As3
Pararammelsbergite2.12.5.1NiAs2
Paxite2.12.5.2CuAs2
Rammelsbergite2.12.2.12NiAs2
Skutterudite2.12.17.1CoAs3
Miscellaneous
Maucherite2.16.16.1Ni11As8
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
A2X3
Hematite4.3.1.2Fe2O3
Group 7 - MULTIPLE OXIDES
(AB)5X8
Kamiokite7.6.3.1Fe2Mo3O8
Group 10 - OXYHALIDES AND HYDROXYHALIDES
A2(O,OH)3Xq
Paratacamite10.1.2.1Cu3(Cu,Zn)(OH)6Cl2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 39 - HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
A[HXO4]·xH2O
Pharmacolite39.1.1.2Ca(HAsO4) · 2H2O
(AB)5[HXO4]2[XO4]2.xH2O
Guérinite39.2.2.2Ca5(AsO4)2(HAsO4)2 · 9H2O
Picropharmacolite39.2.4.1Ca4Mg(AsO4)2(HAsO4)2 · 11H2O
Sainfeldite39.2.1.2Ca5(AsO4)2(AsO3OH)2 · 4H2O
Vladimirite39.2.2.1Ca4(AsO4)2(AsO3OH) · 4H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
A3(XO4)2·xH2O
Annabergite40.3.6.4Ni3(AsO4)2 · 8H2O
Erythrite40.3.6.3Co3(AsO4)2 · 8H2O
Rauenthalite40.3.11.1Ca3(AsO4)2 · 10H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A2(XO4)Zq
Olivenite41.6.6.1Cu2(AsO4)(OH)
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)2Zq·xH2O
Tyrolite42.4.3.1Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
(AB)7(XO4)4Zq·xH2O
Lavendulan42.9.4.2NaCaCu5(AsO4)4Cl · 5H2O
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)
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
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
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.
'K Feldspar'-
'Mohawkite'-

List of minerals for each chemical element

HHydrogen
H AnalcimeNa(AlSi2O6) · H2O
H AnnabergiteNi3(AsO4)2 · 8H2O
H AzuriteCu3(CO3)2(OH)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H DatoliteCaB(SiO4)(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H ErythriteCo3(AsO4)2 · 8H2O
H GuériniteCa5(AsO4)2(HAsO4)2 · 9H2O
H GypsumCaSO4 · 2H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H LavendulanNaCaCu5(AsO4)4Cl · 5H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H OliveniteCu2(AsO4)(OH)
H ParatacamiteCu3(Cu,Zn)(OH)6Cl2
H PharmacoliteCa(HAsO4) · 2H2O
H PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
H PrehniteCa2Al2Si3O10(OH)2
H RauenthaliteCa3(AsO4)2 · 10H2O
H SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
H TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
H VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C AzuriteCu3(CO3)2(OH)2
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
OOxygen
O AnalcimeNa(AlSi2O6) · H2O
O AnkeriteCa(Fe2+,Mg)(CO3)2
O AnnabergiteNi3(AsO4)2 · 8H2O
O AzuriteCu3(CO3)2(OH)2
O CalciteCaCO3
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O CupriteCu2O
O DatoliteCaB(SiO4)(OH)
O DolomiteCaMg(CO3)2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O ErythriteCo3(AsO4)2 · 8H2O
O GuériniteCa5(AsO4)2(HAsO4)2 · 9H2O
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O KamiokiteFe2Mo3O8
O LaumontiteCaAl2Si4O12 · 4H2O
O LavendulanNaCaCu5(AsO4)4Cl · 5H2O
O MicroclineK(AlSi3O8)
O NatroliteNa2Al2Si3O10 · 2H2O
O OliveniteCu2(AsO4)(OH)
O ParatacamiteCu3(Cu,Zn)(OH)6Cl2
O PharmacoliteCa(HAsO4) · 2H2O
O PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
O PrehniteCa2Al2Si3O10(OH)2
O QuartzSiO2
O RauenthaliteCa3(AsO4)2 · 10H2O
O SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
O TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
O VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
Na LavendulanNaCaCu5(AsO4)4Cl · 5H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg DolomiteCaMg(CO3)2
Mg PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
AlAluminium
Al AnalcimeNa(AlSi2O6) · H2O
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al MicroclineK(AlSi3O8)
Al NatroliteNa2Al2Si3O10 · 2H2O
Al PrehniteCa2Al2Si3O10(OH)2
SiSilicon
Si AnalcimeNa(AlSi2O6) · H2O
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si DatoliteCaB(SiO4)(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si LaumontiteCaAl2Si4O12 · 4H2O
Si MicroclineK(AlSi3O8)
Si NatroliteNa2Al2Si3O10 · 2H2O
Si PrehniteCa2Al2Si3O10(OH)2
Si QuartzSiO2
SSulfur
S ChalcociteCu2S
S GypsumCaSO4 · 2H2O
ClChlorine
Cl LavendulanNaCaCu5(AsO4)4Cl · 5H2O
Cl ParatacamiteCu3(Cu,Zn)(OH)6Cl2
KPotassium
K MicroclineK(AlSi3O8)
CaCalcium
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca CalciteCaCO3
Ca DatoliteCaB(SiO4)(OH)
Ca DolomiteCaMg(CO3)2
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca GuériniteCa5(AsO4)2(HAsO4)2 · 9H2O
Ca GypsumCaSO4 · 2H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca LavendulanNaCaCu5(AsO4)4Cl · 5H2O
Ca PharmacoliteCa(HAsO4) · 2H2O
Ca PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
Ca PrehniteCa2Al2Si3O10(OH)2
Ca RauenthaliteCa3(AsO4)2 · 10H2O
Ca SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
Ca TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Ca VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
FeIron
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe HematiteFe2O3
Fe KamiokiteFe2Mo3O8
Fe Nickelskutterudite(Ni,Co,Fe)As3
CoCobalt
Co ErythriteCo3(AsO4)2 · 8H2O
Co Nickelskutterudite(Ni,Co,Fe)As3
Co SkutteruditeCoAs3
NiNickel
Ni AnnabergiteNi3(AsO4)2 · 8H2O
Ni MaucheriteNi11As8
Ni NickelineNiAs
Ni Nickelskutterudite(Ni,Co,Fe)As3
Ni PararammelsbergiteNiAs2
Ni RammelsbergiteNiAs2
CuCopper
Cu Algodonite(Cu1-xAsx)
Cu AzuriteCu3(CO3)2(OH)2
Cu ChalcociteCu2S
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu CopperCu
Cu CupriteCu2O
Cu DomeykiteCu3As
Cu KoutekiteCu5As2
Cu LavendulanNaCaCu5(AsO4)4Cl · 5H2O
Cu OliveniteCu2(AsO4)(OH)
Cu ParatacamiteCu3(Cu,Zn)(OH)6Cl2
Cu PaxiteCuAs2
Cu TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
ZnZinc
Zn ParatacamiteCu3(Cu,Zn)(OH)6Cl2
AsArsenic
As Algodonite(Cu1-xAsx)
As AnnabergiteNi3(AsO4)2 · 8H2O
As DomeykiteCu3As
As ErythriteCo3(AsO4)2 · 8H2O
As GuériniteCa5(AsO4)2(HAsO4)2 · 9H2O
As KoutekiteCu5As2
As LavendulanNaCaCu5(AsO4)4Cl · 5H2O
As MaucheriteNi11As8
As NickelineNiAs
As Nickelskutterudite(Ni,Co,Fe)As3
As OliveniteCu2(AsO4)(OH)
As PararammelsbergiteNiAs2
As PaxiteCuAs2
As PharmacoliteCa(HAsO4) · 2H2O
As PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
As RammelsbergiteNiAs2
As RauenthaliteCa3(AsO4)2 · 10H2O
As SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
As SkutteruditeCoAs3
As TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
As VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
MoMolybdenum
Mo KamiokiteFe2Mo3O8
AgSilver
Ag SilverAg

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: 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]

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]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
The Mines Handbook, 1926.
Moore, Paul B., Copper-Nickel Arsenides of the Mohawk No. 2 Mine, Mohawk, Keweenaw County, Michigan; The Department of the Geophysical Sciences, University of Chicago, Chicago, Illinois 60637.
Rocks & Minerals (1946): 21: 664.
American Mineralogist (1971): 56: 1319-1331.
Mineralogical Record: 23(2).
Rocks & Minerals (1983): 58: 111.

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Localities in this Region
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