[Annals N. T. Academy of Sciences, Vol. XXII, 1 pp. 225-25S, Pll. XXIII- 

 XXXIII. IT September, 1912] 



THE PHYSIOGEAPHY OF THE PERUVIAN ANDES 



WITH 



NOTES ON EAELY MINING IN PERU 



By V. F. Maesters 



(Presented in Abstract before the Academy, 5 February, 1912) 



CONTEXTS 



Page 



Introduction 225 



Topographic provinces of Peru 227 



Coastal plains 228 



Original Tertiary area 235 



Locus of agriculture and its dependence upon physiographic 



phenomena 236 



West slope and West Range of the Andes 239 



Huacho-Oyon section 239 



Ocona-Corro Puno section 240 



Highland Plateau or Intereordilleran Belt 243 



Cerro de Pasco section 245 



Casma-Huaraz-Huacaybamba section 246 



Piura-Huangabamba section 24T 



East Range and East Slope 248 



Topographic expression as related to the geology of the Peruvian Andes . . 249 



Plains and sections 249 



Zorritos-Lambeyaque plain 249 



Chincha-Olmos plain. 250 



Ocona-Moquequa section 251 



Huacho-Cerro de Pasco section 251 



Ocona-Corro Puno section 252 



Notes on early mining in Peru 254 



Resume 258 



Introduction 



So far as I am aware, very little has been written relative to the 

 physiography either of the coast or of the Peruvian Cordillera. As 

 preliminary to the presentation of a few observations on the above 

 subject, I wish to summarize very briefly a list of the early pioneer 

 geographers, geologists and naturalists who have visited the Peruvian 

 shores and have published observations relative to the subject in hand. 



(225) 



