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Rio do Rastro Mountains rs0238.jpg
Serra do Rio do Rastro ( Rio do Rastro Mountains ). State: Santa Catarina, Brazil.  The basaltic flows form layers avaraging 850 meters ( 2800 feet ) thick. Volcanic rock typical of southern Brazil. The State Highway SC-438, linking the coastal plain and the the Lages plateau, paved in 1984, has 284 curves.