 Incapillo is part of the Andean Central Volcanic Zone , which extends through the countries of Chile , Bolivia , and Argentina and includes six or more Quaternary caldera or ignimbrite systems , about 44 stratovolcanoes , and over 18 smaller centres . One of these stratovolcanoes , Ojos del Salado , is the world 's highest volcano . This zone also includes the Altiplano @-@ Puna volcanic complex and the Galan caldera farther south . Incapillo is the southernmost volcano of the Central Volcanic Zone with Pleistocene activity ; the next such volcano to the south is <unk> in the Southern Volcanic Zone at 33 ° southern latitude . 
