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Ashland County, Wisconsin, USAi
Regional Level Types
Ashland CountyCounty
WisconsinState
USACountry

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07640160017272055832683.jpg
Bayfield Sandstones on Madeline Island

Ashland County, Wisconsin, USA
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The North End of the Ashland Black Granite Quarry

Ashland Black Granite Quarry, Ashland County, Wisconsin, USA
09065200017272055843518.jpg
The West Side of the Ashland Black Granite Quarry

Ashland Black Granite Quarry, Ashland County, Wisconsin, USA
07640160017272055832683.jpg
Bayfield Sandstones on Madeline Island

Ashland County, Wisconsin, USA
05263080017272055847798.jpg
The North End of the Ashland Black Granite Quarry

Ashland Black Granite Quarry, Ashland County, Wisconsin, USA
09065200017272055843518.jpg
The West Side of the Ashland Black Granite Quarry

Ashland Black Granite Quarry, Ashland County, Wisconsin, USA
07640160017272055832683.jpg
Bayfield Sandstones on Madeline Island

Ashland County, Wisconsin, USA
05263080017272055847798.jpg
The North End of the Ashland Black Granite Quarry

Ashland Black Granite Quarry, Ashland County, Wisconsin, USA
Neighbouring regions:
Iron County, Wisconsin, USA
Bayfield County, Wisconsin, USA
Price County, Wisconsin, USA
Sawyer County, Wisconsin, USA
Type:
County
Largest Settlements:
PlacePopulation
Ashland8,040 (2017)
Mellen700 (2017)
Glidden507 (2017)
New Odanah472 (2017)
Butternut364 (2017)
Birch Hill293 (2017)
Mindat Locality ID:
25688
Long-form identifier:
mindat:1:2:25688:8
GUID (UUID V4):
0
Other Languages:
View 31 more...
French:
comté d'Ashland, Wisconsin, États-Unis
German:
Ashland County, Wisconsin, Vereinigte Staaten
Italian:
contea di Ashland, Wisconsin, Stati Uniti d'America
Russian:
Эшленд, Висконсин, Соединённые Штаты Америки
Simplified Chinese:
阿什兰县, 威斯康辛州, 美国
Spanish:
Condado de Ashland, Wisconsin, Estados Unidos
Albanian:
Ashland County, Wisconsin, Shtetet e Bashkuara të Amerikës
Arabic:
مقاطعة آشلاند, ويسكونسن, الولايات المتحدة
Basque:
Ashland konderria , Wisconsin
Bavarian:
Ashland County, Wisconsin, Vaoanigte Stootn
Bishnupriya Manipuri:
অ্যাসল্যান্ড কাউন্টি, উইসকনসিন, তিলপারাষ্ট্র
Bulgarian:
Ашланд, Уисконсин, Съединени американски щати
Cebuano:
Ashland County , Wisconsin
Dutch:
Ashland County, Wisconsin, Verenigde Staten
Esperanto:
Kantono Ashland, Viskonsino
Estonian:
Ashlandi maakond, Wisconsin, Ameerika Ühendriigid
Farsi/Persian:
شهرستان اشلند، ویسکانسین, ویسکانسین, ایالات متحده آمریکا
Hungarian:
Ashland megye, Wisconsin, Amerikai Egyesült Államok
Japanese:
アシュランド郡, ウィスコンシン州, アメリカ合衆国
Latin:
Ashland Comitatus, Visconsinia, Civitates Foederatae Americae
Low Saxon/Low German:
Ashland County, Wisconsin, USA
Min Dong Chinese:
Ashland Gông, Wisconsin
Minnan / Hokkien-Taiwanese:
Ashland Kūn
Norwegian:
Ashland County, Wisconsin, USA
Polish:
Hrabstwo Ashland, Wisconsin, Stany Zjednoczone
Portuguese:
Condado de Ashland, Wisconsin, Estados Unidos
Romanian:
Comitatul Ashland, Wisconsin, Statele Unite ale Americii
Sardinian:
contea de Ashland, Wisconsin, Istados Unidos de Amèrica
Serbian:
Округ Ешланд , Висконсин, Сједињене Америчке Државе
Serbo-Croatian:
Ashland County, Wisconsin, Sjedinjene Američke Države
Swedish:
Ashland County, Wisconsin, USA
Traditional Chinese:
阿什蘭縣, 威斯康辛州, 美國
Turkish:
Ashland ilçesi, Wisconsin, Amerika Birleşik Devletleri
Ukrainian:
Ешленд, Вісконсин, Сполучені Штати Америки
Urdu:
ایشلنڈ کاؤنٹی، وسکونسن, وسکونسن, ریاستہائے متحدہ امریکا
Vietnamese:
Quận Ashland, Wisconsin, Chủng Quốc Hoa Kỳ
Waray:
Condado han Ashland, Wisconsin, Estados Unidos


Ashland County’s bedrock is dominated by a 35 km. thick sequence of Precambrian rocks tilted steeply by thrusting along the Marenisco Fault. These Precambrian rocks occur in NE striking belts, with the oldest at the southern edge of the county. The oldest rocks in the section are poorly exposed Archean meta-volcanic and meta-sedimentary rocks. These are overlain by a thick section of Proterozoic sedimentary rocks, including the Ironwood Iron Formation, which was the main formation extensively mined in the Gogebic Iron Range. These are overlain by a thick section of 1.1 billion year old (Keweenawan) volcanic rocks (Powder Mill Group and Portage Lake Lava Series) from the Mid-Continent Rift. These are intruded by the complexly differentiated Keweenawan–age plutons of the Mellen Complex. On top of these is a package of Proterozoic sedimentary rocks (Oronto Group) which further filled the rift after the cessation of volcanism. The youngest bedrock, separated from the older rocks by another large thrust fault, the Douglas Fault, is the little metamorphosed Proterozoic Bayfield Group sandstones.

The Keweenawan volcanic rocks are well exposed along the gorge in Copper Falls State Park. The Mellen igneous complex is seen in quarries and outcrops around Mellen, Wisconsin. The dark-colored anorthosites and gabbros of the pluton are quarried and marketed as “black granite”. The plutons also contain red granites that are quarried near Highbridge. The Ironwood Iron Formation and associated sediments are exposed on the ridges along Mt. Wittlesey. Recently (2013) a mining company is proposing to open a large open-pit iron mine in the Mellen area, exploiting these rocks.

The Bayfield Group is elegantly exposed on the Apostle Islands. They were formerly extensively quarried as building stone. The Apostle Islands are largely protected as a National Lakeshore. The islands are often fronted by wave-carved sandstone cliffs popular with tourists. They are most approachable in Big Bay State Park on Madeline Island.

Glacial drift and glacial lake sediments cover a lot of the county. The coarse tills and outwash can yield interesting minerals such as “drift” copper and Lake Superior agates.

Select Mineral List Type

Standard Detailed Gallery Strunz 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

43 valid minerals. 1 erroneous literature entry.

Rock Types Recorded


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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ Almandine
Formula: Fe2+3Al2(SiO4)3
ⓘ 'Amphibole Supergroup'
Formula: AB2C5(T8O22)W2
ⓘ Andalusite
Formula: Al2(SiO4)O
ⓘ Andalusite var. Chiastolite
Formula: Al2(SiO4)O
ⓘ Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
ⓘ Anorthite
Formula: Ca(Al2Si2O8)
ⓘ 'Apatite'
Formula: Ca5(PO4)3A
ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Localities: Reported from at least 8 localities in this region.
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Localities: Reported from at least 6 localities in this region.
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Chamosite
Formula: Fe2+5Al(AlSi3O10)(OH)8
ⓘ Chamosite var. Thuringite
Formula: (Fe,Mg,Al)6(Si,Al)4O10(O,OH)8
ⓘ 'Chlorite Group'
ⓘ 'Clinopyroxene Subgroup'
ⓘ Cordierite
Formula: Mg2Al4Si5O18
ⓘ Cubanite
Formula: CuFe2S3
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ Fayalite
Formula: Fe2+2(SiO4)
ⓘ 'Fayalite-Forsterite Series'
ⓘ 'Feldspar Group'
ⓘ Forsterite
Formula: Mg2(SiO4)
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Grunerite
Formula: ◻Fe2+2Fe2+5(Si8O22)(OH)2
Localities: Reported from at least 6 localities in this region.
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
Localities: Reported from at least 6 localities in this region.
ⓘ Hematite var. Kidney Ore
Formula: Fe2O3
Locality: Ashland, Ashland County, Wisconsin, USA - erroneously reported
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(C2+4C3+)(AlSi7O22)W2
ⓘ 'Hypersthene'
Formula: (Mg,Fe)SiO3
ⓘ Ilmenite
Formula: Fe2+TiO3
Localities: Reported from at least 6 localities in this region.
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ 'K Feldspar'
ⓘ Kyanite
Formula: Al2(SiO4)O
ⓘ Laumontite
Formula: CaAl2Si4O12 · 4H2O
ⓘ 'Limonite'
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 15 localities in this region.
ⓘ Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ Marcasite
Formula: FeS2
ⓘ 'Mica Group'
ⓘ Minnesotaite
Formula: Fe2+3Si4O10(OH)2
ⓘ Molybdenite
Formula: MoS2
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Copper
Formula: Cu
ⓘ Native Gold
Formula: Au
ⓘ Nickeline
Formula: NiAs
ⓘ Orthoclase
Formula: K(AlSi3O8)
ⓘ 'Orthopyroxene Subgroup'
Localities: Reported from at least 6 localities in this region.
ⓘ Pentlandite
Formula: (NixFey)Σ9S8
ⓘ Pigeonite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Localities: Reported from at least 10 localities in this region.
ⓘ Pyrite
Formula: FeS2
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
Localities: Reported from at least 6 localities in this region.
ⓘ Quartz var. Chalcedony
Formula: SiO2
ⓘ Quartz var. Lake Superior Agate
Formula: SiO2
References:
Brian Cowger
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ Siderite
Formula: FeCO3
ⓘ Sphalerite
Formula: ZnS
ⓘ Staurolite
Formula: Fe2+2Al9Si4O23(OH)
ⓘ Talc
Formula: Mg3Si4O10(OH)2
ⓘ Zircon
Formula: Zr(SiO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘBornite2.BA.15Cu5FeS4
ⓘPentlandite2.BB.15(NixFey)Σ9S8
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘCubanite2.CB.55aCuFe2S3
ⓘNickeline2.CC.05NiAs
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘvar. Titanium-bearing Magnetite4.BB.05Fe2+(Fe3+,Ti)2O4
ⓘHematite4.CB.05Fe2O3
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘHematite
var. Kidney Ore ?		4.CB.05Fe2O3
ⓘQuartz
var. Chalcedony		4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘvar. Lake Superior Agate4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘSiderite5.AB.05FeCO3
ⓘAnkerite5.AB.10Ca(Fe2+,Mg)(CO3)2
ⓘDolomite5.AB.10CaMg(CO3)2
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘFayalite9.AC.05Fe2+2(SiO4)
ⓘForsterite9.AC.05Mg2(SiO4)
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘZircon9.AD.30Zr(SiO4)
ⓘAndalusite9.AF.10Al2(SiO4)O
ⓘvar. Chiastolite9.AF.10Al2(SiO4)O
ⓘKyanite9.AF.15Al2(SiO4)O
ⓘStaurolite9.AF.30Fe2+2Al9Si4O23(OH)
ⓘCordierite9.CJ.10Mg2Al4Si5O18
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘPigeonite9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘGrunerite9.DE.05◻Fe2+2Fe2+5(Si8O22)(OH)2
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘMinnesotaite9.EC.05Fe2+3Si4O10(OH)2
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite
var. Illite		9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘChamosite9.EC.55Fe2+5Al(AlSi3O10)(OH)8
ⓘvar. Thuringite9.EC.55(Fe,Mg,Al)6(Si,Al)4O10(O,OH)8
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘOrthoclase9.FA.30K(AlSi3O8)
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘLaumontite9.GB.10CaAl2Si4O12 · 4H2O
Unclassified
ⓘ'Amphibole Supergroup'-AB2C5(T8O22)W2
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Feldspar Group'-
ⓘ'Hypersthene'-(Mg,Fe)SiO3
ⓘ'Limonite'-
ⓘ'Mica Group'-
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Hornblende Root Name Group'-◻Ca2(C2+4C3+)(AlSi7O22)W2
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'K Feldspar'-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Orthopyroxene Subgroup'-
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Apatite'-Ca5(PO4)3A

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ ChamositeFe52+Al(AlSi3O10)(OH)8
Hⓘ GoethiteFe3+O(OH)
Hⓘ Grunerite◻Fe22+Fe52+(Si8O22)(OH)2
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ LaumontiteCaAl2Si4O12 · 4H2O
Hⓘ MalachiteCu2(CO3)(OH)2
Hⓘ MinnesotaiteFe32+Si4O10(OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ StauroliteFe22+Al9Si4O23(OH)
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ Chamosite var. Thuringite(Fe,Mg,Al)6(Si,Al)4O10(O,OH)8
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
CCarbon
Cⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Cⓘ DolomiteCaMg(CO3)2
Cⓘ MalachiteCu2(CO3)(OH)2
Cⓘ SideriteFeCO3
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ Amphibole SupergroupAB2C5(T8O22)W2
Oⓘ AndalusiteAl2(SiO4)O
Oⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Oⓘ AnorthiteCa(Al2Si2O8)
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ AlmandineFe32+Al2(SiO4)3
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ ChamositeFe52+Al(AlSi3O10)(OH)8
Oⓘ Andalusite var. ChiastoliteAl2(SiO4)O
Oⓘ CordieriteMg2Al4Si5O18
Oⓘ DolomiteCaMg(CO3)2
Oⓘ EnstatiteMg2Si2O6
Oⓘ FayaliteFe22+(SiO4)
Oⓘ ForsteriteMg2(SiO4)
Oⓘ GoethiteFe3+O(OH)
Oⓘ Grunerite◻Fe22+Fe52+(Si8O22)(OH)2
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ Hypersthene(Mg,Fe)SiO3
Oⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oⓘ IlmeniteFe2+TiO3
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ KyaniteAl2(SiO4)O
Oⓘ LaumontiteCaAl2Si4O12 · 4H2O
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ MinnesotaiteFe32+Si4O10(OH)2
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ OrthoclaseK(AlSi3O8)
Oⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ QuartzSiO2
Oⓘ SideriteFeCO3
Oⓘ StauroliteFe22+Al9Si4O23(OH)
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ Chamosite var. Thuringite(Fe,Mg,Al)6(Si,Al)4O10(O,OH)8
Oⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Oⓘ ZirconZr(SiO4)
Oⓘ Hematite var. Kidney OreFe2O3
Oⓘ Fayalite-Forsterite Series
Oⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Quartz var. Lake Superior AgateSiO2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Pyroxene GroupADSi2O6
Oⓘ Garnet GroupX3Z2(SiO4)3
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ ApatiteCa5(PO4)3A
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ CordieriteMg2Al4Si5O18
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ ForsteriteMg2(SiO4)
Mgⓘ Hypersthene(Mg,Fe)SiO3
Mgⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ TalcMg3Si4O10(OH)2
Mgⓘ Chamosite var. Thuringite(Fe,Mg,Al)6(Si,Al)4O10(O,OH)8
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ AndalusiteAl2(SiO4)O
Alⓘ AnorthiteCa(Al2Si2O8)
Alⓘ AlmandineFe32+Al2(SiO4)3
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ ChamositeFe52+Al(AlSi3O10)(OH)8
Alⓘ Andalusite var. ChiastoliteAl2(SiO4)O
Alⓘ CordieriteMg2Al4Si5O18
Alⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ KyaniteAl2(SiO4)O
Alⓘ LaumontiteCaAl2Si4O12 · 4H2O
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ OrthoclaseK(AlSi3O8)
Alⓘ StauroliteFe22+Al9Si4O23(OH)
Alⓘ Chamosite var. Thuringite(Fe,Mg,Al)6(Si,Al)4O10(O,OH)8
Alⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AndalusiteAl2(SiO4)O
Siⓘ AnorthiteCa(Al2Si2O8)
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ AlmandineFe32+Al2(SiO4)3
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ ChamositeFe52+Al(AlSi3O10)(OH)8
Siⓘ Andalusite var. ChiastoliteAl2(SiO4)O
Siⓘ CordieriteMg2Al4Si5O18
Siⓘ EnstatiteMg2Si2O6
Siⓘ FayaliteFe22+(SiO4)
Siⓘ ForsteriteMg2(SiO4)
Siⓘ Grunerite◻Fe22+Fe52+(Si8O22)(OH)2
Siⓘ Hypersthene(Mg,Fe)SiO3
Siⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ KyaniteAl2(SiO4)O
Siⓘ LaumontiteCaAl2Si4O12 · 4H2O
Siⓘ MinnesotaiteFe32+Si4O10(OH)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ OrthoclaseK(AlSi3O8)
Siⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ QuartzSiO2
Siⓘ StauroliteFe22+Al9Si4O23(OH)
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ Chamosite var. Thuringite(Fe,Mg,Al)6(Si,Al)4O10(O,OH)8
Siⓘ ZirconZr(SiO4)
Siⓘ Fayalite-Forsterite Series
Siⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Quartz var. Lake Superior AgateSiO2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Pyroxene GroupADSi2O6
Siⓘ Garnet GroupX3Z2(SiO4)3
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
PPhosphorus
Pⓘ ApatiteCa5(PO4)3A
SSulfur
Sⓘ BorniteCu5FeS4
Sⓘ ChalcopyriteCuFeS2
Sⓘ CubaniteCuFe2S3
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ MarcasiteFeS2
Sⓘ MolybdeniteMoS2
Sⓘ Pentlandite(NixFey)Σ9S8
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ OrthoclaseK(AlSi3O8)
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Caⓘ AnorthiteCa(Al2Si2O8)
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ DolomiteCaMg(CO3)2
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ LaumontiteCaAl2Si4O12 · 4H2O
Caⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ AlmandineFe32+Al2(SiO4)3
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ ChamositeFe52+Al(AlSi3O10)(OH)8
Feⓘ CubaniteCuFe2S3
Feⓘ FayaliteFe22+(SiO4)
Feⓘ GoethiteFe3+O(OH)
Feⓘ Grunerite◻Fe22+Fe52+(Si8O22)(OH)2
Feⓘ HematiteFe2O3
Feⓘ Hypersthene(Mg,Fe)SiO3
Feⓘ IlmeniteFe2+TiO3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ MarcasiteFeS2
Feⓘ MinnesotaiteFe32+Si4O10(OH)2
Feⓘ Pentlandite(NixFey)Σ9S8
Feⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ SideriteFeCO3
Feⓘ StauroliteFe22+Al9Si4O23(OH)
Feⓘ Chamosite var. Thuringite(Fe,Mg,Al)6(Si,Al)4O10(O,OH)8
Feⓘ Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Feⓘ Hematite var. Kidney OreFe2O3
Feⓘ Fayalite-Forsterite Series
NiNickel
Niⓘ NickelineNiAs
Niⓘ Pentlandite(NixFey)Σ9S8
CuCopper
Cuⓘ BorniteCu5FeS4
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ CubaniteCuFe2S3
Cuⓘ Native CopperCu
Cuⓘ MalachiteCu2(CO3)(OH)2
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ NickelineNiAs
ZrZirconium
Zrⓘ ZirconZr(SiO4)
MoMolybdenum
Moⓘ MolybdeniteMoS2
AuGold
Auⓘ Native GoldAu

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Ashland_County,_Wisconsin
Wikidata ID:Q494931
GeoNames ID:5244249

Localities in this Region

USA
USA

Other Regions, Features and Areas that Intersect

North AmericaContinent
North America PlateTectonic Plate
USA

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

References

Laybourn, D.P., 1979, Geology and Metamorphism of the Ironwood Iron Formation, Gogebic Range, Wi., Unpub. M.S. Thesis, U of M - Duluth, 223 p.
Cannon, W.F., L.G. Woodruff, S.W. Nicholson & C.A. Hedgman (1996) Bedrock geologic map of the Ashland and the northern part of the Ironwood 30' x 60' Quadrangles, Wisconsin and Michigan: U.S. Geological Survey, Miscellaneous Investigations Series: Map I-2566, 1 sheet.
Nuhfer, Edward (2004) A guidebook to the geology of Lake Superior's Apostle Islands National Lakeshore: Eastern National Press, 141 p.
Cannon, W. , G. LaBerge, J. Klasner & K. Schulz (2007) The Gogebic Iron Range - a sample of the northern margin of the Penokean fold and thrust belt: U. S. Geological Survey Professional Paper 1730, 44 p. plus map.
wgnhs.uwex.edu (n.d.) http://wgnhs.uwex.edu/wisconsin-geology/minerals-wisconsin/
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