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Analyses of Rocinha Limestone 
[ IT HI 
SuUli@a 3 wm LG OS Bis BOR Bio tek a Oe vice, 4 35.30 18.30 6.34 
Jronanl Aluniina,. . a2 ¢ . « S 4». 4 & w& & «x « 2.40 1.60 eals 
Carbonale of Lime. . . . a) coea eras Aer Ge 62.30 78.80 91.02 
Carbonate of Magnesia. fa oe ew we we G ntl trace 1.36 0.66 
100.00] 100.05} 400.20 
I, Sample of limestone from rio Rocinha, Sinta Catharina. 
IT. Sample of limestone from rio Rocinha, Santa Catharina. 
Tlf. Sample of Rocinha limestone as identified by Dr, Cicero Campos, from Salto 
Maud, 15 leaeues north from Tibagy, state of Parana. 
On the road between Florianopolis and Lages near the 130th kilo- 
meter and 7 kilometers south from Bom Retiro, this limestone is seve- 
ral meters in thickness and makes a vertical outcrop in the mountains 
100 meters or more higher than the road, above which rise the lofty 
summits of the Serra Geral girdled with the bold cliffs of the S. Bento 
sandstones. 
Dr. Campos reports that a limestone identical with the Rocinha 
stratum occurs in the bed of Rio Tibagy at Salto Maua, 15 leagues 
below- the town of Tibagy, from which locality he collected the speci- 
men for analysis. 
The horizon of this limestone was not exposed at any point visi- 
ted in the state of Rio Grande doSul, so that nothing is known of its 
presence or absence there. 
In the state ofS. Paulo, it is probably represented by the cherty 
beds with fossil woud which crop 10 to 15 meters above the mouth of 
the boring at Bofete. 
Its presence asa fairly pure limestone in the states of Santa Cathe- 
rinaand Paranais a matter of much economic importance, since lime 
and cement for structural purposes are very expensive articles of com- 
merce in the interior of these states. 
