andes antisana argentina atacama desert austral volcanic zone central volcanic zone chachani chile coropuna cotopaxi crampons descabezado grande el misti first ascent fueguino galeras geographic coordinate system geologic time scale holocene huaynaputina human sacrifice ice axe johan reinhard licancabur list of mountain types list of volcanoes in argentina list of volcanoes in chile llullaillaco national park mocho-choshuenco monte burney mount hudson mountain range north volcanic zone ojos del salado parinacota pichincha volcano pleistocene pre-columbian quechua reventador sabancaya salta province sangay south volcanic zone stratovolcano the new york times tungurahua tupungatito tupungato ubinas volcano western hemisphere