W oopwortH.— Geological Expedition to Brazil and Chile. 
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 Sio Paulo may 
be regarded as the dying out of the Serra da Mantiqueira 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. 
