article: Volcanoes of South America
links: Ecuador San Diego State University Cotopaxi Charles Darwin Americas BBC Bolivia Nazca Plate Science (journal) UNESCO Pacific Ring of Fire Quito Chile Galápagos Islands Santiago Villarrica (volcano) Peru Volcanic ash Crust (geology) 1960 Valdivia earthquake Galapagos Altiplano University of Göttingen Volcano Arequipa Pleistocene International Space Station World Heritage Site Hawaiian Sangay National Park Precambrian Llullaillaco South America Andes