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Douglas Co., Wisconsin, USAi
Regional Level Types
Douglas Co.County
WisconsinState
USACountry

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Key
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Locality type:
Largest Settlements:
PlacePopulation
Superior26,579 (2017)
Lake Nebagamon1,058 (2017)
Solon Springs602 (2017)
Poplar600 (2017)
Superior Village558 (2017)
Oliver398 (2017)
Other Languages:
French:
comté de Douglas, Wisconsin, États-Unis
German:
Douglas County, Wisconsin, Vereinigte Staaten
Italian:
contea di Douglas, Wisconsin, Stati Uniti d'America
Russian:
Дуглас, Висконсин, Соединённые Штаты Америки
Simplified Chinese:
道格拉斯縣, 威斯康辛州, 美国
Spanish:
Condado de Douglas, Wisconsin, Estados Unidos
Albanian:
Douglas County, Wisconsin, Shtetet e Bashkuara të Amerikës
Arabic:
مقاطعة دوغلاس, ويسكونسن, الولايات المتحدة
Basque:
Douglas konderria , Wisconsin
Bavarian:
Douglas County, Wisconsin, Vaoanigte Stootn
Bishnupriya Manipuri:
ডগলাস কাউন্টি, উইসকনসিন, তিলপারাষ্ট্র
Bulgarian:
Дъглас, Уисконсин, Съединени американски щати
Cebuano:
Douglas County , Wisconsin
Dutch:
Douglas County, Wisconsin, Verenigde Staten
Farsi/Persian:
شهرستان داگلاس، ویسکانسین, ویسکانسین, ایالات متحده آمریکا
Hungarian:
Douglas megye, Wisconsin, Amerikai Egyesült Államok
Japanese:
ダグラス郡, ウィスコンシン州, アメリカ合衆国
Latin:
Douglas Comitatus, Visconsinia, Civitates Foederatae Americae
Low Saxon/Low German:
Douglas County, Wisconsin, USA
Min Dong Chinese:
Douglas Gông, Wisconsin
Minnan / Hokkien-Taiwanese:
Douglas Kūn
Norwegian:
Douglas County, Wisconsin, USA
Polish:
Hrabstwo Douglas, Wisconsin, Stany Zjednoczone
Portuguese:
Condado de Douglas, Wisconsin, Estados Unidos
Romanian:
Comitatul Douglas, Wisconsin, Statele Unite ale Americii
Sardinian:
contea de Douglas, Wisconsin, Istados Unidos de Amèrica
Serbian:
Округ Даглас , Висконсин, Сједињене Америчке Државе
Serbo-Croatian:
Douglas County, Wisconsin, Sjedinjene Američke Države
Swedish:
Douglas County, Wisconsin, USA
Traditional Chinese:
道格拉斯縣, 威斯康辛州, 美國
Turkish:
Douglas County, Wisconsin, Amerika Birleşik Devletleri
Ukrainian:
Дуґлас, Вісконсин, Сполучені Штати Америки
Urdu:
ڈگلس کاؤنٹی، وسکونسن, وسکونسن, ریاستہائے متحدہ امریکا
Vietnamese:
Quận Douglas, Wisconsin, Chủng Quốc Hoa Kỳ
Waray:
Condado han Douglas, Wisconsin, Estados Unidos


Douglas County is underlain entirely by Precambrian (Keweenawan) volcanic and sedimentary rocks associated with the Mid-Continent Rift System. These are liberally covered by Pleistocene sediments, including thick deposits of lake clays from previous high stands of Lake Superior. The best exposures are in Pattison and Amnicon Falls State Parks where one can see the volcanic rocks juxtaposed on little metamorphosed Precambrian sandstones along the Douglas Fault. This juxtaposition forms waterfalls, such as Big Manitou Falls, the state's highest, in Pattison State Park. Although never a significant copper produced, the county's volcanic rocks do yield minerals suites similar to those found in Michigan's more famous Keweenaw Peninsula. Coarse glacial drift can yield interesting minerals such as banded iron formation, jasper, float copper and "Lake Superior" agates.

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

23 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:

'Albite-Anorthite Series'
Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Cordua, W.S. (1991) Minerals of the Buckley Quarry, Douglas County, Wisconsin: Mineral News : 7(6): 2-3.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Cordua, W.S., 1998, "Minerals of Wisconsin", Rocks and Minerals vol. 73 #6, p. 378 - 399.
'Apophyllite'
Reference: Cordua, W.S. (1991) Minerals of the Buckley Quarry, Douglas County, Wisconsin: Mineral News : 7(6): 2-3.
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: Cordua, W.S., 1998, "Minerals of Wisconsin", Rocks and Minerals vol. 73 #6, p. 378 - 399.
Baryte
Formula: BaSO4
Reference: Cordua, W.S., 1998, "Minerals of Wisconsin", Rocks and Minerals vol. 73 #6, p. 378 - 399.
Bornite
Formula: Cu5FeS4
Reference: Cordua, W.S., 1998, "Minerals of Wisconsin", Rocks and Minerals vol. 73 #6, p. 378 - 399.
Calcite
Formula: CaCO3
Localities: Reported from at least 10 localities in this region.
Chalcocite
Formula: Cu2S
Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 6 localities in this region.
'Chlorite Group'
Localities: Reported from at least 9 localities in this region.
Copper
Formula: Cu
Localities: Reported from at least 12 localities in this region.
Cuprite
Formula: Cu2O
Reference: Cordua, W.S., 1998, "Minerals of Wisconsin", Rocks and Minerals vol. 73 #6, p. 378 - 399.
Datolite
Formula: CaB(SiO4)(OH)
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 13 localities in this region.
Hematite
Formula: Fe2O3
Reference: Cordua, W.S. (1990), Amygdule Minerals of the South Range Quarry, Douglas County, Wisconsin: Rocks and Minerals: 65: 412-415. 

Ilmenite
Formula: Fe2+TiO3
Reference: Cordua, W.S. (1991) Minerals of the Buckley Quarry, Douglas County, Wisconsin: Mineral News : 7(6): 2-3.
'K Feldspar'
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Cordua, W.S., 1998, "Minerals of Wisconsin", Rocks and Minerals vol. 73 #6, p. 378 - 399.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Localities: Reported from at least 9 localities in this region.
Malachite
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 8 localities in this region.
Marcasite
Formula: FeS2
Reference: Cordua, W.S. (1991) Minerals of the Buckley Quarry, Douglas County, Wisconsin: Mineral News : 7(6): 2-3.
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Cordua, W.S. (1991) Minerals of the Buckley Quarry, Douglas County, Wisconsin: Mineral News : 7(6): 2-3.
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Localities: Reported from at least 10 localities in this region.
'Pumpellyite'
Quartz
Formula: SiO2
Localities: Reported from at least 11 localities in this region.
Quartz var: Agate
Quartz var: Chalcedony
Formula: SiO2
Saponite
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Reference: Cordua, W.S. (1991) Minerals of the Buckley Quarry, Douglas County, Wisconsin: Mineral News : 7(6): 2-3.
Silver
Formula: Ag
Reference: Grant, U. S. (1901), Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin, 2nd Ed.: Wisconsin Geological and Natural History Survey Bull. VI Economic Series #3, 83 p. Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Marcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Quartz4.DA.05SiO2
var: Agate4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Azurite5.BA.05Cu3(CO3)2(OH)2
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Saponite9.EC.45Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Apophyllite'-
'Chlorite Group'-
'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 = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
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
Baryte28.3.1.1BaSO4
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 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 clays
Saponite71.3.1b.2Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
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 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
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, Mixtures, etc.
'Albite-Anorthite Series'-
'Apophyllite'-
'Chlorite Group'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Pumpellyite'-
Quartz
var: Agate
-SiO2
var: Chalcedony-SiO2

List of minerals for each chemical element

HHydrogen
H PrehniteCa2Al2Si3O10(OH)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H LaumontiteCaAl2Si4O12 · 4H2O
H AnalcimeNa(AlSi2O6) · H2O
H DatoliteCaB(SiO4)(OH)
H NatroliteNa2Al2Si3O10 · 2H2O
H MalachiteCu2(CO3)(OH)2
H AzuriteCu3(CO3)2(OH)2
H SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
C AnkeriteCa(Fe2+,Mg)(CO3)2
C AzuriteCu3(CO3)2(OH)2
OOxygen
O PrehniteCa2Al2Si3O10(OH)2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O CalciteCaCO3
O HematiteFe2O3
O LaumontiteCaAl2Si4O12 · 4H2O
O AnalcimeNa(AlSi2O6) · H2O
O DatoliteCaB(SiO4)(OH)
O NatroliteNa2Al2Si3O10 · 2H2O
O IlmeniteFe2+TiO3
O MalachiteCu2(CO3)(OH)2
O K Feldspar (var: Adularia)KAlSi3O8
O AnkeriteCa(Fe2+,Mg)(CO3)2
O BaryteBaSO4
O AzuriteCu3(CO3)2(OH)2
O CupriteCu2O
O Quartz (var: Chalcedony)SiO2
O SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
MgMagnesium
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
AlAluminium
Al PrehniteCa2Al2Si3O10(OH)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al AnalcimeNa(AlSi2O6) · H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al K Feldspar (var: Adularia)KAlSi3O8
Al SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
SiSilicon
Si PrehniteCa2Al2Si3O10(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si LaumontiteCaAl2Si4O12 · 4H2O
Si AnalcimeNa(AlSi2O6) · H2O
Si DatoliteCaB(SiO4)(OH)
Si NatroliteNa2Al2Si3O10 · 2H2O
Si K Feldspar (var: Adularia)KAlSi3O8
Si Quartz (var: Chalcedony)SiO2
Si SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
SSulfur
S ChalcopyriteCuFeS2
S MarcasiteFeS2
S ChalcociteCu2S
S BaryteBaSO4
S BorniteCu5FeS4
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca PrehniteCa2Al2Si3O10(OH)2
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca CalciteCaCO3
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca DatoliteCaB(SiO4)(OH)
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
TiTitanium
Ti IlmeniteFe2+TiO3
FeIron
Fe ChalcopyriteCuFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe MarcasiteFeS2
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe BorniteCu5FeS4
Fe SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
CuCopper
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
Cu CopperCu
Cu MalachiteCu2(CO3)(OH)2
Cu AzuriteCu3(CO3)2(OH)2
Cu BorniteCu5FeS4
Cu CupriteCu2O
AgSilver
Ag SilverAg
BaBarium
Ba BaryteBaSO4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Grant, U. S. (1901), Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin, 2nd Ed.: Wisconsin Geological and Natural History Survey Bull. VI Economic Series #3, 83 p.
Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p.
Cordua, W.S., 1998, "Minerals of Wisconsin", Rocks and Minerals vol. 73 #6, p. 378 - 399.
Dott, Robert H. & J.W. Attig, (2004) Roadside Geology of Wisconsin, Mountain Press, 345 p.

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Douglas_County,_Wisconsin
Wikidata ID:Q494936
GeoNames ID:5250831

External Links

Wisconsin Mineral index - Wisconsin Geological and Natural History Survey http://wgnhs.uwex.edu/wisconsin-geology/minerals-wisconsin/

Localities in this Region
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