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Colo Bogs a remnant of glacial ice 

August 10, 2013
By GARRY BRANDENBURG , Times-Republican

COLO BOGS has been known for decades as a wetland complex a few miles west of State Center. This area of land is relatively flat to slightly undulating in topography. The reason for the land surface's shape is due to the geologically recent Wisconsinan glacial system which penetrated this area about 14,000 years ago. This was the last glacial event that still has implications for Iowans who live in the area at the present time. A massive tongue of ice came out of Canada sliding southward over the Dakotas, Minnesota and north central Iowa. Today's topographic and soil association maps clearly show the "thumb print" of the ice covering as it once existed in Iowa.



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