THE BEAZLL AND GUIANA UPLANDS. 



23 



Gaianas and Brazil. These consist chiefly of crystalline and archaic rocks, sand- 

 stones, and schists, which are overlain to a vast extent by mesozoic and, especially, 



Fio-. 7.— AxDES Scenery. View taken at ttie G ftaupichaca BrtinrtE, Lima — La Oroya Railway 



cretaceous formations. In this respect the same contrast has been observed in the 

 southern as in the northern continent. In the epoch of their appearance, as well 



