■WooDwoRTH. — Geological Expedition to 13i-azil and Chile. 



PLATE 12. 



The gorge of the Iguassu at Serrinha, Parana, west of Ciiritj-ba. The 

 Iguaesu after leaving the baselevelled region about Curityba flows for several 

 miles across the sandstones and boulder-beds at the base of the Permian 

 system. The basal beds are regarded by some Brazilian geologists as possibh- 

 Devonian. Page 65. 



