THE VALPAEAISO MOBAINIC SYSTEM. 349 



into a belt of billowy land standing 200 to 260 feet above the lake, the 

 most elevated portion being at the east in central Allegan Township. Here 

 a sudden descent is made to a narrow till plain standing 150 to 160 feet 

 above Lake Michigan, east of which an abrupt rise takes place in Watson 

 Township to. an elevation of 260 to 330 feet above the lake, or 840 to 910 

 feet above tide. This rolling belt continues to the west part of Martin 

 Township, where a gravel apron borders the moraine, having an elevation 

 of 240 to 260 feet above Lake Michigan, or 820 to 840 feet above tide. 

 The very elevated portion of the moraine in Watson Township appears to 

 be doubled upon itself in a peculiar manner. Its western part is bordered 

 on the north, west, and south by a till plain, and this western end forms a 

 very prominent part of the moraine, having knobs 80 feet or more in height 

 above the bordering basins and plains. 



Passing now to T. 1 N., it is found that the eastern portion of the 

 moraine in Watson Township continues to the south part of that township 

 and there turns abruptly to the west, following the north side of the Kala- 

 mazoo River from Otsego to Allegan, along the south border of the till 

 plain referred to above. At Allegan it joins a rolling sandy tract which 

 lies west of that city, and the combined belt takes a southwesterly course, 

 occupying nearly the whole of Cheshire Township. The north and west 

 tiers of sections are partly on the moraine and partly on the sandy plain 

 which borders it on the west. The morainic system is here narrowed to 

 the width of a single township and has the Saginaw moraines combined 

 with its eastern border and the Pine Plains bordering it on the west. 



Passing to T. 1 S., the morainic belt is found to spread out to a width 

 of nearly 15 miles. Its inner border takes a nearly west course to the 

 vicinity of Grand Junction. It then passes south to Breedsville, lying a 

 short distance east of the Chicago and West Michigan Railroad. West from 

 this railroad in Geneva Township are isolated tracts with undulatory sur- 

 faces surrounded by marshes, swamps, and till plains. These knolly tracts 

 extend in two instances north across the base line into Allegan County, so 

 that the whole district south of the "Pine Plains" in both T. 1 N. and T. 1 

 S. and east of a till ridge (Covert Ridge) which borders Lake Michigan in 

 South Haven and Casco townships, is in places more or less morainic in 

 topography, but the main morainic belt lies east of the Chicago and 

 Western Michigan Railroad. 



