1921] EDWARDS, GLACIAL LAKE LAPHAM. 95 



the line of the present Green Bay valley which is extended south- 

 ward by the depression occupied by the Fox river and Lake Win- 

 nebago. These two glacial lobes coalesced at the line of hills now 

 seen in the central part of Waukesha county and known as the 

 Kettle Moraine. These hills are composed entirely of drift and 

 now form the most conspicuous topographic feature of eastern Wis- 

 consin. All of the deposits eastward of this line of moraine were 

 left by the ice of the Lake Michigan lobe, while those to the west 

 belong to a similar series of the Green Bay lobe. The maximum 

 extension of the ice of the Michigan lobe, as well as the position of 

 the several successive lines of moraine which, at different times, 

 marked the edge of the retreating ice sheet, have been determined 

 by Dr. Alden and are shown on his map. The melting of this lobe 

 caused a gradual withdrawal of the ice from, the basin of Lake 

 Michigan, and we find encircling the lower end of the lake, from 

 Manitowoc southward to Chicago, a series of drift ridges or mo- 

 raines closely parallel to the present shore. These have been 

 grouped together by Dr. Alden under the name Lake Border 

 Morainic System. This system comprises, not a single line of 

 moraine hills, but several ridges of such material, at times coalesc- 

 ing and again entirely separate one from another. As a rule, these 

 can be traced for long distances and are found to merge at their 

 northern end with the Kettle Moraine which marks the contact of 

 the ice of the Michigan lobe with that of the Green Bay lobe. 



Three of these morainal ridges cross the City of Milwaukee, the 

 most eastern ending at this city. This moraine enters the city 

 limits as a conspicuous ridge, extending in a northwesterly-south- 

 easterly direction, from the north line of the city at approximately 

 the end of the Green Bay Road to the lake front at Juneau Park. 

 This is a very conspicuous moraine in the eastern part of the city, 

 and forms the high land on which the reservoir in Kilbourn Park 

 near the Milwaukee river is located. After crossing the valley of 

 the Milwaukee, it is further seen in the prominent high land oc- 

 cupying the lower end of the east side, where it forms the bluff 

 along the lake front in Juneau Park. At this point, the moraine is 

 cut off by the waters of Lake Michigan and is not again seen in 

 Wisconsin. 



The second of these moraines, is a much more important and 

 far more extended line of drift than the one just described. It is 



