1. Bowman — Physiography of the Central Andes. 385 



as far north as Cuzco, Peru. Photographs of the Cerro de 

 Pasco region seem to indicate, together with reports upon the 

 complex structure of the region, an identical history. Con- 

 sidering the wide range of observations and the excellent 

 development of the feature of baseleveling, its importance 

 at once becomes evident. Within the mountainous or residual 

 mass one has the utmost wildness of mountain form — pinna- 

 cles, needles and crags developed upon the highly complex 

 schists and gneisses whose upturned edges are cleaved by the 

 swift snow-fed streams. The wildness and beauty of the 



Fig. 19. 



Fig. 19. Eastern end of Lake Titicaca, with dissected plateau-remnant in 

 the background. 



scenery are brought out by fig. 20, a photograph representing 

 Alpine features within the JSTevaclas de Araca. 



To describe each separate locality where the now uplifted 

 and dissected peneplain was identified, would be essentially 

 but a repetition of the descriptions already given. Near 

 Huynuni, 15,500 ft. above sea level and 500 ft. above the tin 

 mines of that place, a splendid view to the south and southwest 

 was obtained, and no one could fail to be astonished at the 

 perfection of its development there. At the Abra Puca-Puca 

 and Abra de Malaga, northeast of Cochabamba, fig. 21, the 

 view includes a great sweep of country to the south and south- 

 east toward Sucre ; and as far as the eye can reach the even 

 sky-line denotes how extensive is the development of the 

 peneplain in this direction ; while the same great stretch of 



