si i . I 



±t^2?C~* 





^mmz 



&&?> 





■ -* it 



mmk 



r^vr 



i'r^v^*^ 







Fig. 169. 



Fig. 170. 



Fig. 169 — The line of unconformity between the igneous basement rocks (agglom- 

 erates at this point) and the quartzites and sandstones of the Urubamba Valley, 

 between the town of Urubamba and Ollantaytambo. 



Fig. 170 — The inclined lower and horizontal upper sandstone on the southeastern 

 wall of the Majes Valley at Hacienda Cantas. The section is a half-mile high. 



