— 193 ~— 
A few kilometers from S. Sepé, these measures hold limy beds 
filled with fragments of crustaceans (legs), and also some undeter- 
mined fossil shells, kindly presented to the Commission by Sr. 
Carlos Trein of Santa Cruz. 
Some of the sandy layers in these beds at times become thick 
enough to be quarried for building stone, as at Ararangud, Santa Ca- 
tharina, where a hill south from the town furnishes a poor quality 
of soft chocolate gray sandstone which appears ts belong near the top 
of these beds. 
On the Estrada Nova, in Santa Catharina, just east from the 
48th kilometer, immense concretions of a silicious nature, 2 me- 
ters or more in diameter, occur in these strata, and are strown along 
the road. 
The Rocinha Limestone 
At the very top of the Permian, and capping out the Carboniferous 
beds in Santa Catharina, there occurs a light gray limestone which 
from its presence along Rio Rocinha, a branch of Rio Passa Dois, in 
Santa Catharina, has been termed the Rocinha limestone. 
The stratum, showing a little more than 3 meters in thickness, 
is exposed for 50-75 meters along the bed of the stream, and im- 
Mediately below a cliff of reddish sandstone which appears to rest 
unconformably upon the limestone, but whether the unconformity is 
merely local or general in its nature is not certainly known, although 
the probabilities ave that il is a case of genuine unconformily and that 
the Rocinha Limestone is the dividing line between the Carboniferous 
(Permian) and Triassic, since in the next higher terrane occur fossil 
reptilian remains which are closely allied with Triassic types. 
No fossils except fragments of minute forms most probably of 
fresh water origin were observed in the Rocinha deposit. 
The chemical constitution of the stratum is shown by the fol- 
lowing analyses, made under the supervision of Prof. H. Hite. 
5909 25 
