212 GEOLOGY OF EASTERN WISCONSIN. 



The general relationship of this Eange to the rock terrane that un- 

 derlies it has ah-eady been stated under the head of Topography, viz. : 

 that the southern portion rests upon its crest, and the northern upon 

 its eastern slope. Instead of lying along the ridgepole of this rocky, 

 one-sided roof, the northern end has slid half way down to the eaves. 

 But something more of detail as to its topographical relations is 

 needed. 



Beginning again in the town of Eandall, its abrupt face looks out 

 eastward upon a comparatively level surface with no intervening land 

 of equal height between it and the lake. The opposite side in the 

 town of "Walworth is also higher than the surface west of it. The 

 Eange between Burlington and Geneva faces higher land on the oppo- 

 site side of the "White river. In the northwestern part of "Walworth 

 county there is a broad area of much lower land to the northwest, 

 while on the opposite side of the Eange the surface rises toward Elk- 

 horn, which is the highest portion of the county. The surface in 

 Mukwonago rises higher than that of the Eange in Eagle, and in "Wau- 

 kesha county generally, the surface is higher to the east than the base 

 of the Eange, although its peaks are the highest points in the county. 

 Throughout "Washington county, except along the northern line, the 

 ridge is conspicuously higher than the surface on either hand. In 

 Sheboygan and Fond du Lac counties, it is much higher than the sur- 

 face east, but barely equals the highlands of Taycheedah, Empire and 

 Eden on the west. Beyond this it is higher than the surface east, 

 but lower or barely equal to that west. 



It should be borne in mind that these comparisons have reference 

 to the suinmit of the Eange, and that the base may be reckoned 200 

 feet lower on the average. This fact is the more important, since in 

 considering the question of its origin, the elevation of the base and 

 not of the summit is the important consideration. 



Taking this into account, it becomes a conspicuous fact that, 

 setting aside the irregularities near the state line, the Kettle Eango 

 in the southern portion is flanked on the east by higher lands, that 

 near the center it attains the supremacy, and that in the northern por- 

 tion it is overtopped by highlands on the west. 



This is not to be considered as at variance with the statement 

 already made in reference to the rock ridge that undei-lies it, for the 

 highlands to the east of it in the southern portion are great drift 

 hills, but of regular, rounded contour as previously described. 



And I may here again call attention to the fact that the hills and 

 ridges on the east of the range have an east-west trend, and those on the 

 opposite side, a north-south trend, or unessential variations from these. 



