Help|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 ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember 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

Forest Co., Wisconsin, USA

This page is currently not sponsored. Click here to sponsor this page.
Complex Precambrian rocks underlie Forest 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 representing a sequence caught up between colliding continents and deformed during the 1.8 billion year old Penokean Orogeny. Several massive sulfide deposits are known in the county, including the world-class Crandon deposit. Their discovery is based almost solely on geophysical and drill core records - outcrops are sparse. In the southeastern corner of the County, cleaner quartzite of McCaslin Mountain are exposed in monadnocks. 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

35 entries listed. 28 valid minerals.

Localities in this Region

The above list contains all mineral locality references listed on 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 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.


LaBerge, G. L. (1994) Geology of the Lake Superior Region: Geoscience Press, 313 p.

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.

External Links

Wisconsin Mineral index - Wisconsin Geological and Natural History Survey

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2017, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: April 27, 2017 19:51:44 Page generated: January 17, 2015 14:08:28
Go to top of page