"WooDwoRTH. — Geological Expedition to Brazil and Chile. 



PLATE 16. 



The Serra Geral from Minas in the Tuberao Valley. 



The dim wall in the background is the escarpment of erosion formed by the 

 Triassic trap sheets and the underlying sandstones, below which comes the 

 Permian shales. The foreground, looking up the Tuberao just east of the 

 Lauro Miiller railway station is on the Permian plant-bearing shales. The 

 coal mines at Minas occur at a higher level to the left of the view. According 

 to Dr. I. C. White this wall from the top down presents the following section : — 



1. Eruptive rocks, mostly diabase, amygdaloidal and otherwise, GOO M. 



2. Massive grey and red sandstones and conglomerates with intruded sheets 



and dikes of diabase. 200 M. 

 Red sandstones and shales, a massive red sandstone at the base resting with 

 slight unconformity upon limestone, approximately 100 M. The rocks 

 below are referred to in the accompanying text. Page 92. 



