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La Crosse Co., Wisconsin, USA

LaCrosse County is underlain by Cambrian and Ordovician sandstone and dolostone. Both are well exposed as bluffs and along deep drainages (or "coulees") of streams draining down to the Mississippi. The dolostone is often quarried, where there is the potential to find drusy quartz crystals, chert, calcite , dolomite and sulfides such as pyrite and marcasite. Although in the "Driftless Area" that escaped recent glacial cover, fluvial sediments found along the Mississippi corridor are derived from glacial drift upstream. Thus there is the potential to find interesting minerals such as drift gold, banded iron formation, jasper, copper nuggets and "Lake Superior" agates in this alluvium.

Mineral List

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

var: Lake Superior Agate

2 entries listed.

Localities in this Region


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Dott, Robert H. & J.W. Attig, (2004) Roadside Geology of Wisconsin, Mountain Press, 345 p.

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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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