Cerro Sarisariñama is a tepui, a flat-topped mountain in Jaua-Sarisariñama National Park at the far south-west of Bolívar State, Venezuela, near the border with Brazil.
[citation needed] Similar to other tepuis, Sarisariñama consists of quartzite of the Roraima formation, belonging to the Paleoproterozoan era.
[4] Another Sarisariñama sinkhole, the 1.35-kilometer-long (0.84 mi) Sima de la Lluvia, has been very important for exploration of the processes of erosion on tepuis.
Sarisariñama became a much sought destination for exploration after 1961, when pilot Harry Gibson noticed both enormous sinkholes.
[2] For some two decades it was the longest known quartzite cave (1.35 km) in the world, and its exploration to a great extent solved the mystery of the formation of these sinkholes.