HISTORY OF BOYER VALLEY 



495 



branch of this old-time system. A little stream now comes down 

 along this branch from the higher land near Breda in northwest 

 Carroll county and empties, or did empty, into the southern arm of 

 Wall lake. 



Fig. 123. — Profiles of Boyer valley. Upper profile, west of Lake View, Sac 

 county. Lower profile, at Ells, Crawford county. Horizontal scale, one inch 

 equals five thousand feet. Vertical scale, one-fourth inch equals one hun- 

 dred thirty feet. 



It is very natural to assume that the lower part of Indian crec'k 

 valley, east of Lake View, and Raccoon river above the mouth of 

 Indian creek may have formed the main upper Boyer river. How- 

 ever, there are several facts which seem to stand in the way of such 

 an assumption. Opposite Lake View the valley of Indian creek is 

 half a mile wide and fairly flat floored. It is capacious enough to 

 accommodate a much larger stream than the one which now occupies 

 it. But within a mile to the west the valley is shallower and the 

 walls are gentler. This is perfectly normal, but it seems anomalous 

 to find on descending the valley from Lake View that about a mile 

 and a half below the town the valley walls approach each other 

 abruptly and from here to the mouth are nowhere more than one- 

 fourth mile apart and in many places are so close as to leave almost 

 no room for a flood plain. The outlet creek of Wall lake is likewise 

 a small stream in a narrow, rather shallow valley. 



Indian creek northwest of Lake View lies just within the edge 

 of a belt of rough country known as the Wisconsin moraine which 

 forms the margin of a sheet of glacial drift which is called the Wis- 

 consin. This moraine is much less prominent about the lower course 

 of Indian creek, and the country here is much smoother and more 

 level prairie. 



Wall lake is separated from the valley of Indian creek at their 

 closest approach merely by a strip of hills and hollows not over one- 

 fourth mile wide. The lake level is about twenty feet higher than 

 that of Indian creek, although this probably is due to the inequalities 



