WooDwoRTH. — Geological Expedition to Brazil and CldTe. 



PLATE 6. 



Reproduction of a model of a portion of the state of Sao Paulo made by the 

 Geographical and Geological Commission of Sao Paulo and based on the 

 topographic surveys of Horatio E. Williams. The model brings out the 

 detail of the erosion of the metamorphic and igneous Pre-Devonian belt 

 forming the Atlantic slope of the highlands near Santos; the Serra do Japy 

 southwest of Jundiahy. The roughened surface northeast of Sao Paulo may 

 be regarded as the dying out of the Serra da Maritiqueira which range rises 

 rapidly to the northeast of the area shown in the relief map. Except for 

 the Tertiary basin in the smoothened area about Sao Paulo, the topography is 

 developed on metamorphic and igneous rocks of the Pre-Devonian terrane. 

 Page 99. 



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