70 



bulletin: museum of compakative zoology. 



The Tuherao Valley Section. — The Permian beds at Orleans and 

 near Minas in the upper valley of the Rio Tuberao are better known 

 than any section of the Palaeozoic north of Rio Grande do Sul. Not 

 only have the coal beds in that hydrographic basin been reported 

 upon at different times by a number of foreign mining engineers but 



Tridss/cju/itJl Perwidn;ujith Tre-Dei/onidn; 

 IcLi'd flon/5. thifi coa.1 beds>. mainly Cra^nife. 



Fig. 19. — Sketch map of the Minas-Orleans district in the Tuberao Valley, 

 Santa Catharina. 



the region has been very thoroughly explored by Brazilian geologists 

 and recently the staff of the Coal Commission under the directorship 

 of Dr. I. C. White has made a still more detailed report upon the 

 geological structure and the nature of the strata of this part of the 

 field. According to the terminology of Dr. White's Report this section 

 from the granite basement to the top of the Serra Geral trap plateau 

 comprises the following formations named in descending sequence : — 



Triassic 



Sao Bento series 



Serra Geral eruptives 

 Sao Bento sandstone 

 Rio do Rasto red beds 



