TP. 152 HYDROLOGICAL MAPS 2

Contrary to popular belief, all rivers flow south in North America is wrong. Rivers flow in all directions in order to get to the lowest spot obtainable, whether it be an endorheic lake or sea level. In Wisconsin, the biggest river is the Wisconsin River which has its source at Lac Vieux Desert at 1600′ above sea level and flows primarily both south and west to drain into the Mississippi River near Prarie du Chien at just over 600′ AMSL. That’s a 1000′ drop in 420 miles in which the river flows in all 4 directions in its search for the lowest spot dictated by the terrain. Wisconsin was covered by numerous glaciers epochs ago, except in the southwest section of the state, known as the driftless area. There are 2 rivers that drain this area and head south for the Rock River in Illinois on its path to the Mississippi River. But something interesting happens to these rivers on their quest to eventually drain into the Gulf of Mexico. The westernmost River, known as the Pecatonica River, gets close to the Rock and then turns northeast heading for the upper Rock River near Rockton, Illinois. East of the Pecatonica River, draining the area southwest of Madison, Wi., is the Sugar River also heading south to intersect the Illinois portion of the Rock River. But then it turns northeast and merges with the Pecatonica near Shirland, Illinois.  The entire area is abound with oxbow lakes and swamps and is indicative to a stalled river system that slowed the waters down. After the 2 rivers merge, the Pecatonica River flows due east to merge with a big westerly bend of the Rock River at Rockton. Only 2 things would cause this unusual scenario. 1. A meteorite hit just west of Rockton that caused a depression that attracted 3 rivers and Racoon Creek into the caldera that eventually filled up with glacial fill, leaving no crater or rim visible, just like Manson Crater in Iowa, or 2. Paul Bunyan and Babe wrestled here years ago on their way to Florida.

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