Complex sentence: 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.
Split into simpler sentences: Incapillo is part of the Andean Central Volcanic Zone, which extends through the countries of Chile, Bolivia and Argentina. Six or more Quaternary caldera or ignimbrite systems and about 44 stratovolcanoes and over 18 smaller centres.