396 



PERU 



CHAP. XVI 



speculations, however, must be vague ; for who will pretend to 

 say that there may not have been several periods of subsidence, 

 intercalated between the movements of elevation ? for we know 

 that along the whole coast of Patagonia there have certainly 

 been many and long pauses in the upward action of the 

 elevatory forces. 



n- 



HUACAS. PERUVIAN rOTTERV. 



