ANE ard s 
596 Vestiges of Glacial Man in Minnescta, [June, 
defined on the east by a broken chain of uplands which take on 
different names in different parts of their course. Thus they are 
known in Wisconsin as the Kettle range, and in Minnesota and 
Dakota, as the Coteau des Prairies and the Coteau du Missouri, te- 
spectively. Geological authorities agree that the range indicated 
is a series of terminal moraines, and that it defines the limits 
attained ‘by the great northern glaciers, at the acme of their 
southern advance, during the last of the universally recognized 
glacial epochs of North America. The morainic belt is regarded as 
an accumulation of débris, due to long-continued glacial halts, and 
alternations of advance and recession; the rubbish thrown down 
by ice melting while stationary or creeping back,at one time, having 
been plowed up and redistributed at the next subsequent period 
of. forward movement. When the climate at length became per- 
manently warmer, and the glaciers withdrew for the last time to 
the frozen regions of the north, they left their outline traced, as im 
a scroll of huge hieroglyphics, across the open page of the 
continent. 7 
This morainic belt does not follow the lines of latitude, but de- 
scends to its southern limit in an irregular series of broad : 
often very long lobes. These touch each other, and merge pa 
one at their lateral borders, on the east and west, while fi 
southern terminus each preserves an independent outline, a 
on a rounded contour at the extremity, and ending 14 ag ii 
less elongated curve prolonged towards the south. pe 
have, in southern Wisconsin, the well defined moraine ppt 
glacier descending from Lake Michigan into northern xi 
the western edge of which was joined by the eastern margi? © 
a similar ice-current coming down from Green bay. . 
of their united edges moved forward along the mi ant | 
combined masses in a single line of aggregation, now payne 
a medial moraine. At the extremity, each glacier pye w 
pendently to the south, where the moraines of R 
the form of two large, irregularly rounded lobes, Joine® | 
of the medial moraine. eet pape ortheast 
Still west of the Green Bay moraine lies that o pets alls, bY 
glacier, the western edge of which is skirted, at ae described 
the terrace-plain of the Mississippi river, = hithe fie Missi* 
A few miles further west still, on the opposite ais si 
sippi, yet another moraine of the modern ep? or 
the ba 
down 
