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 ListMineral list contains entries from the region specified including sub-localities
5 entries listed. 5 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.
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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New Locality Added: Cabeço do Tojal Mine, Samil, Bragança, Bragança District, PortugalFrom Rui Nunes, 18th Sep 2014 15:28:42