Oneota Dolomite

The Oneota Formation is a geologic formation in the upper Midwest (United States) including Minnesota, Illinois, Indiana and Wisconsin. It preserves marine fossils dating back to the Ordovician period. The Sugar Loaf landmark located in Winona, Minnesota is made of Oneota Dolomite.

Oneota Dolomite

The Oneota Formation is a geologic formation in the upper Midwest (United States) including Minnesota, Illinois, Indiana and Wisconsin. It preserves marine fossils dating back to the Ordovician period. The Sugar Loaf landmark located in Winona, Minnesota is made of Oneota Dolomite.