The Abismo Guy Collet (SP-090) is the deepest cave in South America, and the deepest in the world that is formed in quartzite. Located in a tepui in northern Brazil near the border with Venezuela, this cave was first explored by cavers in 2006 to a depth of .
Sima Pumacocha in Peru held the previous depth record in South America, determined to be deep in 2004.
References A Ong Akakor Geographical Exploring Descobre a Caverna Mais Profunda do Mundo em Quartzito . Ayub, Soraya; 29th Brazilian Speleological Congress, June 2007