142 The Ai^^des and the Amazon. 



Yana-urcn and CotocacM. Yana-urcii, or " black mount- 

 ain," is a mass of calcined rocks. Cotocachi (from cotaf 

 and cada^ salt) is always snow-clad. On its side is Cuj- 

 coclia, one of the highest lakes in the world (10,200 feet), 

 and formed by the subsidence of a part of the volcano. 



