C. SKOTTSBERG 



Fig. 8. The escarpment between Vaquen'a and Juanango, Masatierra, showing the numerous 

 vertical dikes. — Photo C. Skottsberg 26/^ i^qS. 



Fig. 9. Diagrammatic sketch of part of the escarpment between Vaquen'a and Juanango; comp. 

 hg. 8. Dikes black; in nature they do not run quite so regularly. 



