670 DYNAMICAL GEOLOGY. 



the Mer de Glace. In fig. 949, the bands correspond to different 

 tributaries of this glacier, and the broadest one to the right is that 

 of the Geant Glacier. 



4. General appearance. — Fig. 953 is a reduced copy of a sketch in 

 Agassiz's great work, representing the Glacier of Zermatt, or the 

 Gorner Glacier, in the Mt. Rosa region. This grand glacier receives 



Fig. 953. 



Glacier of Zermatt, or the Gorner Glacier. 



some of its tributaries from the right, but the larger part beyond 

 the Eiffelhorn, the near summit on the left. The dark bands on 

 the glacier are lines of stones and earth, called moraines. The lon- 

 gitudinal lines on fig. 949 represent moraines on the Mer de Glace. 

 The ice of a glacier is intersected by fractures or crevasses made by 

 its movement through the irregular valley. 



Glaciers descend slopes of all angles. There are cataracts and 

 cascades among them as well as among rivers. One of the large 

 tributaries of the Mer de Glace, the Glacier du Geant [g, fig. 948), 

 descends in an immense ice-cascade from the plateau of the Col 

 du Geant into the valley below. The Glacier of the Rhone — one 



