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Geologic units in La Crosse county, Wisconsin

Additional scientific data in this geographic area

Cambrian, undivided (Cambrian) at surface, covers 79 % of this area

Sandstone with some dolomite and shale, undivided; includes Trempealeau, Tunnel City, and Elk Mound Formations

Prairie du Chien Group (Ordovician) at surface, covers 21 % of this area

Dolomite with some sandstone and shale; includes Shakopee and Oneota Formations

Middle and Upper Cambrian (Middle and Upper Cambrian) at surface, covers < 0.1 % of this area

Sandstone, siltstone, and shale; includes the Wonewoc Sandstone, Eau Claire Formation, and Mt. Simon Sandstone.