QUATERNARY PORMATIOIsi S — THE DRIFT. 2 13 



All these facts, wliicli have been matters of careful attention, are 

 of supreme importance in considering the origin of this remarkable 

 formation. 



The summit altitudes of a few of the more prominent points will 

 be of interest in this connection. Others, if desired, may be found in 

 the list of elevations previously given, or, in a general way, by refer- 

 ence to the topographical map. 



In See. 36, S. hf., S. E. qr., Randall, neajr the state line 340 feet. 



Near the state line in the towns of Linn and Walworth, above 400 " 



The observations not being suiEciently reliable to warrant a more 



exact statement. 



Tree Bluff, Sec. 24, near center, Whitewater 457 " 



Bald Bluff, Sec. 33, S. E. qr., Palmyra 463 " 



Government Hill, town of Delafield 611 '■ 



Lapham's Peak, Sec. 14, Erin 824 " 



Sugar Loaf in Sec. 24, near middle S. line, Hartford 740 " 



HiU near middle S. line, Sec. 2, Mitchell 580 " 



Top of Range, N. W. qr.. Sec. 5, Memee 348 " 



Last prominent hUl in the Range at the north, middle W. hf.. Sec. 13, 



Casco 235 " 



The Kange then reaches its culmination in Lapham's Peat, 824 

 feet above Lake Michigan. Several of these hills rise from 150 feet 

 to 250 feet above their immediate bases. The depth of the drift can- 

 not be less than 300 feet at many points along the ridge, from which 

 we see that the accumulation is vast, and that the force that heaped it 

 up must have been powerful. 



The foregoing facts gather themselves into a mass of evidence 

 whose force is altogether irresistible. The Kettle Range is evidently 

 a gigantio moraine. The main Eange from Kewaunee county to 

 "Walworth county marks the westward limit of the glacier that oc- 

 cupied the basin of Lake Michigan, and the eastern limit of the one 

 that plowed through the Green Bay valley. The branch that extends 

 southward into Illinois, is the continuation of the terminal moraine 

 of the Lake Michigan glacier. The branch that recurves through the 

 northern part of Eock county and thence northward, is the terminal 

 moraine of the Green Bay glacier, upon that side. 



Neither of these indicates the extreme limits of the glacial move- 

 ment, for in the eastern part of Eock county, although striae are 

 absent, the contour of the hills, together with the composition of the 

 drift, show that the movement was from the eastward. In the vicinity 

 of Beloit, fossils of the Eacine limestone are common. On the other 

 hand the train of bowlders extending southwestward from the 



