EROSION ON HURON AND RAISIN RIVERS 343 



shown in his map, page 327. A little below, not shown on his map, an- 

 other swing of the Huron to the left has almost captured Willow run, 

 leaving only a low ridge dividing the flood-plains. From the point of 

 view of lateral erosion it is of interest that the Huron, twice swinging 

 to the left, almost invaded a neighbor valley; Eattle rim, swinging to 

 right, actually did it. Mr Parkins' measures are : Total length of both 

 bluffs, 5,470 paces; scaur to right, 231; to left, 31; slipping bank to 

 right, 1,034; to left, 86. The pacing was done in September, 1906, 



Huron Kiver 



The Huron was examined from Ypsilanti to New Boston, a distance 

 by the river of about 20 miles. The bluffs are commonly wooded and 

 stand well. True scaurs are infrequent. The note book containing de- 

 tails has been lost. It is, however, remembered that, coimting scaur and 

 slipping bank together there was about two-thirds on the right bank.- Of 

 the true scaur there was slightly more on the left. The proportion of 

 slip in the valley was not ascertained. The Huron does not completely 

 flood its valley like the lower Eouge, but does inundate broad strips on 

 each side every year. It is in dry weather a fairly clear stream and flows 

 to the south-southeast. 



Kaisin Eiver 



The Raisin runs to lake Erie parallel to the Huron, about 16 miles to 

 the southeast of it, on the same lake plains. It has two chief arms — the 

 Saline on the north and the Eaisin on the south — that meet at Dundee. 

 Examination has been confined to these two branches. This region is 

 essentially a coastal plain, with parallel, consequent drainage. Thus 

 Paint creek (Stony creek) rises between Ann Arbor and Ypsilanti and 

 flows all the way to lake Erie, never more than a few miles distant from 

 the much larger Huron. The Eaisin has developed more complexity. 

 The branching above Dundee has the appearance of having arisen from 

 the capture of rivals and neighbors on right and left. 



There is an upper course to the Eaisin that is fairly consequent in 

 course, but the two branches referred to Join nearly head on at a strong 

 angle to the trunk below, the Saline coming from the north, the Eaisin 

 from the south-southwest. Along this part of the course of the tributary 

 Eaisin and near that of the Saline, Leverett locates the shore of lake 

 Warren, running north-northeast, Just east of the southern branch. It 

 could hardly fail to guide the river in that direction, and seems to fully 

 account for its deviation from consequent flow. Where the beach passes 



