198 /. Bowman — Physiography of the Central Andes. 



from lofty tableland to abysmal ocean depth that is character- 

 istic of the entire coast. It represents conditions along the 

 coast of northern Chile in the vicinity of Taltal, where the 

 Andes, attaining a height of over 16,000 feet, fall off to the 



Fig. 1. 



enormous depth below sea level of over 25,000 feet, a total 

 descent of over 40.000 feet in 175 miles. Of this descent, 

 32,600 feet is accomplished in 75 miles. From the north- 



FlG. 



yg* 





■■•- 



- 



Fig. 2. Coastal Terrace at Payta, Peru. 



western coast of Peru southward to Concepcion, in southern 

 Chile, the 4,000-meter submarine contour is never more than 

 125 miles from the coast and generally less than half that dis- 



