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Florence Co., Wisconsin, USA

Complex Precambrian rocks underlie Florence County, which are obscured by thick glacial drift, lakes, forests and marshes. Scattered outcrops and drill core reveal older gneissic terrane overlain by Lower Proterozoic meta-sedimentary and meta-volcanic rocks,such as the Quinnesec Group, likely representing an island arc sequence. These are in turn intruded by various ages of granite. Small copper, molybdenite and iron ore (Menominee Range) deposits have been explored. The best outcrops occur at water falls and dams, such as Lasalle Falls and Pine River. Complex pegmatites, such as the Animikie Red Ace, are exposed and likely represent a more extensive swarm associated with the 1.7 billion year old Hoskins Lake granite. The extensive glacial drift in the County can provide some interesting samples to the diligent collector, including "float" copper, banded iron formation and "Lake Superior" agates.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Acanthite
Albite
var: Andesine
var: Oligoclase
'Albite-Anorthite Series'
Alluaudite
Almandine
Amblygonite
'Apatite'
Bavenite
Behierite
Bermanite
Bertrandite
Beryl
var: Morganite
'Biotite'
Calcite
var: Manganoan Calcite
Cassiterite
Chalcocite
Chalcopyrite
Chloritoid
Columbite-(Fe)
Columbite-(Mn)
Cookeite
Elbaite
Epidote
Ferrimolybdite
Fillowite
Fluorapatite
var: Mn-bearing Fluorapatite
'Garnet'
Goethite
Griphite
Grunerite
Hambergite
Helvine
Hematite
var: Martite
var: Specularite
'Hornblende'
Hureaulite
Huttonite
'K Feldspar'
Kyanite
Lepidolite
'Limonite'
Lithiophilite
Löllingite
Magnetite
Microcline
Microlite Group
Molybdenite
Muscovite
var: Fuchsite
var: Sericite
Natrophilite
Opal
var: Opal-AN

Pollucite
Purpurite
Pyrite
Pyrochlore Group
Pyrrhotite
Quartz
Rhodizite
Rhodochrosite
Rynersonite
Schorl
Sicklerite
Spessartine
Spodumene
Stibiotantalite
Tantalite-(Mn)
Tantite
Titanite
'Tourmaline'
'var: Rubellite'
Triphylite
Uraninite
Varulite
Väyrynenite
'Wad'
Wodginite
'Zinnwaldite'
Zircon


86 entries listed. 64 valid minerals.

Localities in this Region

USA
USA

The above list 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

Dott, R. H. & J. W. Attig (2004) Roadside Geology of Wisconsin: Mountain Press, 346 p.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: August 29, 2014 01:15:57 Page generated: December 8, 2013 04:49:09
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