The age of Mount Aconcagua is estimated to be between 10 and 15 million years old. It was formed as a result of the subduction of the Nazca Plate beneath the South American Plate, which led to the uplift of the Andes Mountains. Mount Aconcagua is located in the central Andes, in the province of Mendoza, Argentina. It is the highest mountain in the Americas, with a summit elevation of 6,960.8 meters (22,837 feet).