I 3 4 SALISB UR V AND A TWOOD 



on the map shown in Fig. i. With but one exception they 

 vary from W. 20° S. to W. 30° S. The exceptional direction, 

 W. 60° S., is found on the north side of the main quartzite range 

 (^, Fig. i), where the normal deploying of the ice was pre- 

 vented by the steep face of the bluff. It illustrates the tendency 

 of glacier ice to move in a direction essentially at right angles 

 to its margin. 



The ternii7ial moraine. — The limit of the ice advance is 

 marked by a well defined terminal moraine, the outer margin of 

 which west of the Wisconsin River is shown on the accompany- 

 ing map (Fig. i). Swinging southward from Kilbourn City in 

 in gentle curves, it turns westward in the great valley between 

 the quartsite ranges, and then loops back to the east along the 

 north face of the quartzite range nearly seven miles before crossing 

 it. Across the crest of this range it turns promptly to the west 

 in the valley between the east range and the Devil's Nose. About 

 the elevation which bears this name, the moraine again loops 

 back to the east, and after rounding the "Nose" turns promptly 

 to the west. After following this direction for about two miles, 

 it turns southward, reaching the Wisconsin River about seven 

 miles below Merrimac. 



On the low lands, the terminal moraine has the characteristics 

 which usually affect such formations. In width it varies from half 

 to three-quarters of a mile. Approached from the west, that is, 

 from the driftless side, it is a somewhat prominent topographic 

 feature, often appearing as a ridge thirty, forty or even fifty feet 

 in height. Approached from the opposite direction it is notably 

 less prominent, and its inner limit, wherever located, is a more or 

 less arbitrary line. Beyond its notably irregular course, the ter- 

 minal moraine on the low lands about the quartzite ranges pos- 

 sesses no unusual features. A deep, fresh cut southeast of the 

 lake illustrates its complexity of structure, a complexity which 

 is probably no greater than that of terminal moraines at many 

 points where less well exposed. The section is represented in 

 Fig. 3. The stratified sand to the right preserves even the ripple 

 marks which it received when deposited. To the left, at the same 



