THE LAKE-BOEDER MORAINIC SYSTEM. 389 



to Covert and reaches a distance of 4 miles from the lake just north of that 

 village. Its course then changes to southwest and the ridge comes to the 

 lake border near the middle of the west line of Hagar Township, Berrien 

 County (T. 3 S., R. 18 W.). From this point it follows the bluff of the lake 

 closely to the mouth of the St. Joseph River, where it is interrupted for 

 about a mile. It sets in, however, in the city of St. Joseph and follows the 

 shore of the lake southward for about 8 miles to the vicinity of Stevens- 

 ville. It here bears inland, passing east of Bridgman and Sawyer, but 

 returns to the lake shore again at Union Pier, and is nearly removed by 

 the lake just below that point. The Galien River Valley interrupts the ridge 

 for a space of about a mile, but the ridge reappears on its south bluff in sec. 

 36, T. 7 S., R. 21 W., and from this point is continuously developed as far 

 south as the State line. About a mile south of the State line it becomes 

 vague and is represented only by occasional slight ridging. It is traceable, 

 however, as far southwest as the valley of Trail Creek in sec. 26, T. 38, 

 R. 4 W., about 4 miles east of Michigan City, Indiana. Possibly it finds 

 its continuation westward in the inner member of the double ridge which 

 leads from Trail Creek Valley to Furness, Porter County, Indiana, though 

 it seems quite as probable that it had its continuation nearer the lake shore, 

 and has been either removed by lake waves or concealed by the dunes, 

 there being beach lines closely associated with its western end in the vicinity 

 of the valley of Trail Creek. 



Throughout its entire length of about 80 miles this ridge maintains a 

 nearly uniform width of about 1 mile, the only notable exception being 

 a strip a few miles in length in western Allegan County, where it reaches a 

 width of 2 or 3 miles. Like the outer ridge it presents usually a more 

 abrupt slope on its eastern or outer border than on its inner border. 



The surface of this ridge, like the outer ridge, carries only gentle 

 swells and shallow saucer-like depressions except at the north where it 

 assumes a sharper morainic expression. The change in expression sets in 

 abruptly in northeastern Ganges Township, Allegan County, in the vicinity 

 of Hutchinson Lake. From this point northeastward knolls 15 or 20 feet 

 in height are common and occasionally knolls reach a height of 40 feet. 

 There are also deep basins, the most conspicuous of which is the one 

 occupied by Hutchinson Lake, which has an area of nearly a square mile 

 and is bordered by knolls and ridges rising 40 or 50 feet above its surface. 



