WooDWORTH. — Geological Expedition to Brazil and Chile. 



PLATE 15. 



Sketch map of the geology of south Brazil, based upon surveys by Dr. 

 Orville A. Derby, Dr. I. C. White, the publications of Dr. J. C. Branner, 

 and upon field observations by Dr. Euzebio P. de OHveira and the writer. 

 The boundary of the trap sheet and consequently of the sedunentary area 

 about Lages in Santa Catharina is drawn without any claim to approximation 

 of its true position on the south, and the eastern limits of the effusive trap 

 sheets in western Sao Paulo and northern Parana are likewise mdefinite. No 

 attempt is made to delineate the numerous exposures of intrusive sheets 

 giving rise to the terra roxa of Sao Paulo and northern ParanA. Page 41. 



