Geologic units in Buffalo county, Wisconsin

Additional scientific data in this geographic area

Cambrian, undivided (Cambrian) at surface, covers 67 % 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 32 % 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 0.2 % of this area

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

Ancell Group (Ordovician) at surface, covers 0.1 % of this area

Orthoquartzitic sandstone with minor limestone, shale and conglomerate; includes Glenwood and St. Peter Formations