CHAP. XV. MAP OF EXTINCT GLACIER OF THE RHONE. 



299 



have done had they been transported by floating ice, but 

 continue to keep to the side to which they belonged, assum- 



Fig. 42. 



MAP SHOWING THE SUPPOSED COURSE OF THE ANCIENT AND NOW EX- 

 TINCT GLACIER OF THE RHONE, AND THE DISTRIBUTION OF THE 

 ERRATIC BLOCKS AND DRIFT CONVEYED BY IT TO THE GREAT VALLEY 

 OF SWITZERLAND AND THE JURA. 



ing that they once formed part of a right lateral moraine of 

 a great extinct glacier. That glacier, after arriving at the 

 lower end of the long narrow valley of the upper Rhone at f, 

 filled the Lake of Geneva, f, i, with ice. From f, as from a 

 great vomitory, it then radiated in all directions, bearing 

 along with it the moroines with which it was loaded, and 

 spreading them out on all sides over the great jjlain. But 



