 Incapillo is one of at least six different ignimbrite or caldera volcanoes that are part of the Central Volcanic Zone , in Chile , Bolivia and Argentina . The Central Volcanic Zone is one of four different volcanic arcs in the Andes . About 50 kilometres ( 31 mi ) west of Incapillo lies the Maricunga Belt , where volcanism started 27 mya and involved phases of ignimbritic and stratovolcanic activity , including <unk> volcano , until activity ceased with the last eruption of Nevado de <unk> 6 mya . South of Incapillo , the Pampean flat slab region is associated with tectonic deformation and lack of volcanic activity until <unk> volcano farther south . 
