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Type:
Largest Settlements:
| Place | Population |
|---|---|
| Amery | 2,834 (2017) |
| Osceola | 2,511 (2017) |
| Saint Croix Falls | 2,133 (2017) |
| Frederic | 1,105 (2017) |
| Luck | 1,071 (2017) |
| Clear Lake | 1,040 (2017) |
Other Languages:
French:
comté de Polk, Wisconsin, États-Unis
German:
Polk County, Wisconsin, Vereinigte Staaten
Italian:
contea di Polk, Wisconsin, Stati Uniti d'America
Russian:
Полк, Висконсин, Соединённые Штаты Америки
Simplified Chinese:
波爾克縣, 威斯康辛州, 美国
Spanish:
Condado de Polk, Wisconsin, Estados Unidos
Albanian:
Polk County, Wisconsin, Shtetet e Bashkuara të Amerikës
Arabic:
مقاطعة بولك, ويسكونسن, الولايات المتحدة
Basque:
Polk konderria , Wisconsin
Bavarian:
Polk County, Wisconsin, Vaoanigte Stootn
Bishnupriya Manipuri:
পোল্ক কাউন্টি, উইসকনসিন, তিলপারাষ্ট্র
Bulgarian:
Полк, Уисконсин, Съединени американски щати
Cebuano:
Polk County , Wisconsin
Dutch:
Polk County, Wisconsin, Verenigde Staten
Farsi/Persian:
شهرستان پولک، ویسکانسین, ویسکانسین, ایالات متحده آمریکا
Hungarian:
Polk megye, Wisconsin, Amerikai Egyesült Államok
Japanese:
ポーク郡, ウィスコンシン州, アメリカ合衆国
Latin:
Polk Comitatus, Visconsinia, Civitates Foederatae Americae
Low Saxon/Low German:
Polk County, Wisconsin, USA
Min Dong Chinese:
Polk Gông, Wisconsin
Minnan / Hokkien-Taiwanese:
Polk Kūn
Norwegian:
Polk County, Wisconsin, USA
Polish:
Hrabstwo Polk, Wisconsin, Stany Zjednoczone
Portuguese:
Condado de Polk, Wisconsin, Estados Unidos
Romanian:
Comitatul Polk, Wisconsin, Statele Unite ale Americii
Sardinian:
contea de Polk, Wisconsin, Istados Unidos de Amèrica
Serbian:
Polk County, Висконсин, Сједињене Америчке Државе
Serbo-Croatian:
Polk County, Wisconsin, Sjedinjene Američke Države
Swedish:
Polk County, Wisconsin, USA
Turkish:
Polk, Wisconsin, Amerika Birleşik Devletleri
Ukrainian:
Полк, Вісконсин, Сполучені Штати Америки
Urdu:
پوک کاؤنٹی، وسکونسن, وسکونسن, ریاستہائے متحدہ امریکا
Vietnamese:
Quận Polk, Wisconsin, Chủng Quốc Hoa Kỳ
Waray:
Condado han Polk, Wisconsin, Estados Unidos
Polk County includes the southernmost exposures of the volcanic rock of the 1.1 billion year old Midcontinent Rift. These are masked to the south and west end of the county by Cambrian sandstones and Early Ordovician carbonate rocks. They are well exposed from Dresser north to St. Croix Falls. They are particularly visible in Interstate Park along the Dells of the St. Croix River and numerous hiking trails in the park. Outcrops in the park allow reconstruction of a chain of volcanic highlands progressively covered by the advancing Cambrian sea. Basalt outcrops are also sporadically exposed outside the park from Dresser north to the county line. Minor native copper was produced from the rocks, which are have been subjected to the greenschist facies during burial metamorphism. Epidote, chlorite, adularia and quartz are common amygdule fillings, vein minerals and groundmass replacements. The basalts are quarried at Dresser, which supplies crushed stone, rip rap and other materials. Thick glacial drift covers much of the county, and can yield interesting materials such as float copper, jasper and "Lake Superior" agates to the determined collector. The Ice Age Trail traverses the county, with its western termination in Interstate Park. Interstate Park has excellent displays in its Visitor Center on Ice Age geology. The public library and historical museum in Luck, Wisconsin also features fine geology displays, with artwork illustrating the geological history of the region.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity 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-localities19 valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Actinolite Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| ⓘ Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ Bornite Formula: Cu5FeS4 |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Chalcocite Formula: Cu2S |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ 'Chlorite Group' |
| ⓘ Chrysotile Formula: Mg3(Si2O5)(OH)4 |
| ⓘ Clinozoisite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) References: |
| ⓘ Cuprite Formula: Cu2O |
| ⓘ Dolomite Formula: CaMg(CO3)2 |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ Ilmenite Formula: Fe2+TiO3 |
| ⓘ 'K Feldspar' |
| ⓘ 'K Feldspar var. Adularia' Formula: KAlSi3O8 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Native Copper Formula: Cu |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Tremolite Formula: ◻Ca2Mg5(Si8O22)(OH)2 |
| ⓘ Zoisite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.00.05 | SiO2 |
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| ⓘ | Chrysotile | 9.00. | Mg3(Si2O5)(OH)4 |
| ⓘ | Clinozoisite | 9.BG.05a | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Zoisite | 9.BG.10 | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| ⓘ | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ | Actinolite | 9.DE.10 | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| ⓘ | Tremolite | 9.DE.10 | ◻Ca2Mg5(Si8O22)(OH)2 |
| Unclassified | |||
| ⓘ | 'K Feldspar var. Adularia' | - | KAlSi3O8 |
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ | 'K Feldspar' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| H | ⓘ Chrysotile | Mg3(Si2O5)(OH)4 |
| H | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| H | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| O | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| O | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Chrysotile | Mg3(Si2O5)(OH)4 |
| O | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| O | ⓘ Cuprite | Cu2O |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Ilmenite | Fe2+TiO3 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| O | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Na | Sodium | |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Mg | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Mg | ⓘ Chrysotile | Mg3(Si2O5)(OH)4 |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Al | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Si | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Si | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | ⓘ Chrysotile | Mg3(Si2O5)(OH)4 |
| Si | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Si | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| S | Sulfur | |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Chalcocite | Cu2S |
| K | Potassium | |
| K | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Ca | Calcium | |
| Ca | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Ca | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Ca | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ti | Titanium | |
| Ti | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | Iron | |
| Fe | ⓘ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Fe | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Cu | Copper | |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Native Copper | Cu |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Fossils
There are 4 fossil localities from the PaleoBioDB database within this region.These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.
| Occurrences | 4 | ||||||
|---|---|---|---|---|---|---|---|
| Youngest Fossil Listed | 485 Ma (Early/Lower Ordovician) | ||||||
| Oldest Fossil Listed | 501 Ma (Cambrian) | ||||||
| Stratigraphic Units |
| ||||||
| Fossils from Region | Click here to show the list. | ||||||
| Fossil Localities | Click to show 1 fossil locality |
Other Databases
| Wikipedia: | https://en.wikipedia.org/wiki/Polk_County,_Wisconsin |
|---|---|
| Wikidata ID: | Q376102 |
| GeoNames ID: | 5267654 |
Localities in this Region
- Wisconsin
Other Regions, Features and Areas that Intersect
North AmericaContinent
North America PlateTectonic Plate
- Mid-continent DomainDomain
- Mid-continent RiftNarrow Rift
USA
- Midcontinent RiftGeologic Province
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References
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Silver Brook copper prospects, Interstate State Park, Polk County, Wisconsin, USA