Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Jackson Co., Wisconsin, USA

This page is currently not sponsored. Click here to sponsor this page.
 
 
Jackson County is underlain by Cambrian sedimentary rocks, dominantly quartz sandstone, with complex Precambrian rocks exposed along deeper river drainages, particularly the Black River. The Precambrian rocks contain some of the oldest rocks in the state, dating from the Archean. These include gneisses and amphibolites severely deformed by the 1.8 billion year old Penokean Orogeny, a continent - continent collision. These are intruded by various pre- , syn- and post-tectonic granitic rocks. Good places to see these rocks are below the dams at Hatfield and Black River Falls. Archean banded iron formation was exposed at the Jackson County Iron mine from 1969 to 1986. The large open pit and dumps are now part of Wazee Lake County Park. The open pit is now a deep lake popular with scuba divers. Smaller deposits of iron ore were sporadically in the area dating back as far back as 1857.

Some of the Cambrian quartz sandstone has potential as "frac sand". Locally wavellite and other phosphate minerals form veins and cement in the sandstone.

Glacial drift cover is relatively thin, and the landscape is dominated by pleasant buttes or "mounds" underlain by Cambrian strata. Outwash gravel from Pleistocene meltwater can yield some interesting rocks from glacial drift such as copper, banded iron formation and "Lake Superior" agates.

Mineral List

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


42 entries listed. 33 valid minerals.

Localities in this Region


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

Maas, R. S. & W. R. Van Schmus (1980) Precambrian tectonic history of the Black River Valley: guidebook prepared for the 26th Annual meeting of the Institute on Lake Superior Geology, 43 p.

Brown, B. (editor) 1983, Three billion years of geology: a field trip through the Archean, Proterozoic, Paleozoic and Pleistocene geology of the Black River Falls area of Wisconsin: Wisconsin Geological and Natural History Survey, Field trip Guidebook 9, 51 p.

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

External Links

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

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: August 29, 2015 08:26:28 Page generated: January 14, 2015 15:51:05