Oneota Dolomite
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Oneota Formation | |
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Stratigraphic range: Ordovician | |
![]() Sugar Loaf Bluff, Oneota Formation | |
Type | Formation |
Unit of | Prairie du Chien Group |
Sub-units | Kasota limestone |
Underlies | Shakopee Dolomite |
Overlies | Jordan Sandstone and Potosi Dolomite |
Location | |
Region | Midwestern United States |
Country | United States |
Extent | Illinois, Indiana, Minnesota, and Wisconsin |
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.[1]
The Sugar Loaf landmark located in Winona, Minnesota is made of Oneota Dolomite.
See also
References
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