of 



may melt away at about the same place; this 

 accumulates an enormous amount of debris; an 

 advance of the ice may plough through this and 

 repile it, or the retreat of the ice or a changed 

 direction of its flow may pile the debris else- 

 where and over wide areas. Many of these ter- 

 minal moraines are an array of broken embank- 

 ments, small basin-like holes and smooth, level 

 spaces. The debris of these moraines embraces 

 rock-flour, gravel, pebbles, a few angular rock- 

 masses, and enormous quantities of many-sized 

 boulders, rocks rounded by the grind of the 

 glacial mill. 



Strange freight, of unknown age, these creep- 

 ing ice rivers bring down. One season the frozen 

 carcass of a mountain sheep was taken from the 

 ice at the end of the Arapahoe Glacier. If this 

 sheep fell into a crevasse at the upper end of the 

 glacier, its carcass probably had been in the ice 

 for more than a century. Human victims, too, 

 have been strangely handled by glaciers. It 

 appears that in 1820 Dr. Hamil and a party 

 of climbers were struck by a snowslide on the 

 slope of Mont Blanc. One escaped with his life, 



255 



