NE-SAW-JE-WON 



FIGURE 3.— GLACIAL MAP OF THE GREAT LAKES REGION 



SHOWING THE DIRECTIONS OF MOVEMENT OF THE SEVERAL GLACIAL LOBES 

 AND THE POSITIONS OF THE ICE BORDER AT SUCCESSIVE STAGES IN THE 



RETREAT. 



From Frank Leverett and F. B. Taylor. 



deepened and widened, but did not carve them to the U- 

 shaped valleys which distinguish the action of glaciers in high 

 mountains. These tongues or lobes of ice in the valleys that 

 now are the basins of the Great Lakes acted almost as inde- 



22 



