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Vernon Co., Wisconsin, USA

The bedrock in Vernon County is Cambrian to Ordovician sedimentary rocks, primarily clean quartz sandstones, limestones, shales and dolostones. Softer Cambrian sandstone underlie valleys, with the more resistant Ordovician rocks holding up highlands. The area is in Wisconsin's "Driftless Area", meaning it apparently missed glaciation during the Pleistocene. River processes have pleasantly carved the landscape into a series of high hills ("mounds") and deep valleys ("coulees"). Scenic bluffs line the Wisconsin and Mississippi River Valleys. Driving the "Great River Road" (Highway 35) as it wends its way along the Mississippi is a great way to enjoy this country.

The carbonate rocks are often quarried, and can yield samples of calcite, dolomite, quartz and marcasite. A few small copper deposits are known from the dolostones, and are likely fringe deposits of the Upper Mississippi Valley Zinc-Lead district further to the south.

Even though in the Driftless Area, deposits from rivers draining glaciated areas to the north and east hold the promise of finding drift copper, "Lake Superior" agates and other minerals in outwash.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Chalcocite
Chalcopyrite
Dolomite
Glauconite
Malachite


5 entries listed. 5 valid minerals.

Localities in this Region

USA
USA

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References

Heyl, A. & West, W. (1982) Outlying mineral occurrences related to the Upper Mississippi Valley Mineral District, Wisconsin, Iowa, Illinois, and Minnesota: Economic Geology: 77(8): 1803-1817.

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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.
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