70 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
The Tuberdo 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 
AZ? 1G 2ias” (Gree wieP f 
roa “A as 
CLES: 
Triassic with  Permian;with  Pre-Devonian; 
lava flows. thin coal beds, mainly granite, 
Fic. 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 
