Iran's central plateau is actually a tectonic plate. It forms a basin surrounded by several tall, heavily eroded mountain ranges, principally the Elburz Mountains in the north and the Zagros range in the west and south. The geology is highly unstable, creating frequent earthquakes. Several important volcanoes, including Mount Damāvand, the nation's highest peak at approximately 19,000 feet, (5,800 meters) also ring the country.