Ordovician - Sinnipee Group

Steven Dutch, Natural and Applied Sciences, University of Wisconsin - Green Bay
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Ordovician- Sinnipee Group
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Ordovician - Sinnipee Group

The Sinnipee group consists of three formations, all dolostone. From top to bottom they are the Galena, Decorah and Platteville. They form escarpments here and there but are not as prominent as the Niagara Escarpment because of burial by glacial deposits.

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Created 11 Sep 1997, Last Update 02 April 2013

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