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Build Wisconsin Built 100 Miles of Kettles A T THE junction of the ice tongue which pushed down Lake Michigan; with the one which moved down Green Bay, there was deposited along the higher land between them one of the most impressive glacier-built ranges of hills on the continent - the great Kettle Moraine. This extends from close to the southern boundary of the state, near Lake Geneva, for a hundred miles north- ward. It is a broad belt of most irregularly deposited material - humps and hollows (the latter called kettles and giving the name to the moraine), boalder strewn slopes and serpentine ridges, small lakes and marshes, and here and there a stream twisting back and forth in an apparently hopeless attempt to find its way out of the maze. No road can follow a straight course in this Kettle Moraine, and no traveller can predict the prospect that will be disclosed by the turn in the road a hundred yards ahead. It may turn abruptly about a "kettle" full of water - a lakelet too small to make even a dot on the map - or it may dis- close a hillside pasture with a herd of Guernsoys or Holsteins. A few hun- dred yards farther it may enter a sunny open. wooded area, and wind through it on ever changing levels for a mile or two. Kettle Moraine is not a range of hills that stand up in marked eleva- tion above the surrounding area. The elevations are all moderate. Hills with a vertical distance much more than a hundred feet from base to summit are uncommon. Much of the material used by the glaciers to build up these hill_ is gravel. Again the comparison of the ice sheet to a great millstone comes home to us. In the grinding process the softer materials of the rocks were ground finest and only the harder and better stone was left as pebbles and bowlders. Thus this prehistoric millstone was working for the Wisconsin of today and piling up groat stores of gravel of selected quality - ready - prepared building material, which is now used in groat quantities in building roads and concrete structures. Work of a Master Sculptor IT WAS a masterly task that the glacier accomplished. It is difficult to picture to oneself when driving over this broad gently-rolling area dotted with farm homes and villages, that here once was a preglacial valley, now buried to a depth of five or six hundred fect, or that a mile away the old rock wall in the valley comes to within fifty foot of the present surface. The glacier did not always complete its work. Some of the old valleys it only partly filled, depositing a little material at one spot and piling it high at another. Some master of design must have guided this erratic workmanshipm since it resulted in the most attractive features of the landscape - the thousands of lakes that dot the whole glaciated portion of the state. The low places in the old valleys filled with water and the higher glacial deposits were the dams which held it back. .
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