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Pepin Co., Wisconsin, USA

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Pepin County is underlain by Cambrian and Ordovician strata, primarily quartz sandstones and dolomitic carbonates. There is a relatively thin discontinuous cap of glacial drift left by earlier Pleistocene glaciations, thus the landscape is influenced largely by bed rock. The Ordovician carbonates of the Prairie du Chien Group form the strata on top of the bluffs along the Mississippi, and line the narrow valleys or coulees that drain to the Mississippi. Drusy quartz, dolomite, calcite and goethite pseudomorphs after pyrite and marcasite occur in quarries and outcrops in this strata. Less resistant Cambrian sandstone, often glauconitic underlie the valleys. The glacial drift hosts a variety of minerals, including drift gold, jasper, banded iron formation and "Lake Superior" agates.

Mineral List

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

7 entries listed. 6 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.


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

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