192 MAN AND THE GLACIAL PERIOD. 



the 4,000-foot level, and one at an altitude of 4,000 feet 

 is from 800 to 900 feet high, and completely crosses 

 and dams up the ravine down which the glacier formerly 

 came. 



Some have supposed that there are indubitable evi- 

 dences of former glaciation in the mountain-ranges of 

 southwestern Africa between latitude 30° and 33°, but 

 the evidence is not as unequivocal as we could wish, and 

 we will not pause upon it. 



The mountains of Australia, also, some of which rise 

 to a height of more than 7,000 feet, are supposed to have 

 been once covered with glacial ice down to the level of 

 5,800 feet, but the evidence is at present too scanty to 

 build upon. But in New Zealand the glaciers now clus- 

 tering about the peaks in the middle of the South Island, 

 culminating in Mount Cook, are but diminutive repre- 

 sentatives of their predecessors. This is indicated by ex- 

 tensive moraines in the lower part of the valleys and by 

 the existence of numerous lakes, attributable, like so many 

 in Europe and North America, to the irregular deposi- 

 tion of morainic material by the ancient ice-sheet.* 



* See With Axe and Rope in the New Zealand Alps, by G. E. 

 Mannering, 1891. 



