The Westward Trains. 
503 
ridges and the not infrequent occurrence of quartzite blocks, in 
the ravines and on the lower slopes. The massive drumlin forms 
thickly set over this area indicate a deep deposition over its 
surface of the products of the latest drift which appears, in the 
frequent road and railway sections that have been examined in 
the region, to be almost free from the local quartzite material. 
Over the east half of York township from its second tier of 
sections southward, quartzites are of frequent occurrence on the 
surface. They are rarely seen, however, on its west half and 
and none at all in the next township west except in its south¬ 
west corner. Here and in the adjacent corner of Windsor, sev¬ 
eral fragments were found after careful search through a num¬ 
ber of roadway sections. Others were found on the west line 
of this township, the one farthest north on a ridge slope on sec¬ 
tion 7, west of He Forest station. In the south half of Vienna 
township three or four bowlders and several smaller fragments 
were found on the surface and in roadway sections. Two or 
three were noted in each of the townships to the west, Dane 
and Roxbury, which mark the northern limits of this bowlder 
train as here defined. 
The center of the train is traced by a more abundant distribu¬ 
tion which crosses the next tier of townships to the south, and 
includes the north half of Medina, all of Sun Prairie except its 
southeast corner which lies within the bounds of the south¬ 
western train, and the townships of Burke, Westport, Spring- 
field, Berry, Madison, Middleton, and the east margin of Cross 
Plains. In the townships nearest the ledges, bowlders and 
smaller fragments are found on nearly all ridge surfaces. In 
Sun Prairie township they are much less abundant, a half 
dozen only having been noted within the limits here defined. In 
Burke township a few were seen upon the high limestone under¬ 
laid plateau east of the lakes, and several in the kame deposits 
found in the valley followed by the Madison and Watertown 
railway. In Madison township a half dozen quartzite cobbles 
were found in a gravel pit on the roadside directly east of Lake 
Mendota and three fragments from as many different areas of 
the Waterloo group in a railway excavation on the line of the 
Illinois Central in section 29, two miles southwest of the city. 
