i.e 23.7 to 5.3 million before the present time. Iran’s mountains belong to the Neogene era and especially the Miocene age, some of these mountains are of volcanic origin. Mount Taftan, a massive cone reaching 4,042 meters in southeastern Iran emits gas and mud at sporadic intervals. Mount Damavand with an altitude of 5,671 meters has been inactive in historical times. In northwestern Iran, Mount Sablan with a height of 4,812 and Mount Sahand reaching 3,710 meters from the mean sea level are notable examples of dormant volcanoes but There is no active volcano in Iran today.