Examples of dead volcanoes, more commonly referred to as extinct volcanoes, include Mount Ashitaka in Japan, Hohentwiel in Germany, Huascarán in Peru, Kyushu-Palau Ridge in the Philippine Sea, Mount Buninyong in Australia, Shiprock in the United States and Zuidwal in the Netherlands. Geologists define an extinct volcano as one that has not erupted in 10,000 years and no longer has an underground supply of lava.Know More
Additional volcanoes that geologists believe are extinct include Kilimanjaro in Tanzania, Mount Warning in Australia, Chaîne des Puys in France and Elbrus in Russia. Some volcanoes listed as dormant may actually be extinct, while other volcanoes technically listed as extinct may just be dormant. For example, the 2004 eruption of Alaska's Fourpeaked Mountain occurred more than 10,000 years after its previous eruption, meaning that its classification as extinct was incorrect.
Other famous examples of extinct volcanoes erupting after more than 10,000 years include the Soufriere Hills volcano in Montserrat in 1995 and the Pompeii-destroying eruption of Mount Vesuvius in 79 A.D. Although geologists believe that the Yellowstone Caldera in Yellowstone National Park has not erupted for over 640,000 years, some scientists believe it may still be active, due to evidence of minor lava flow and frequent small earthquakes, which are a sign of seismic activity.Learn more about Volcanoes
Most of the world's volcanoes are located around the edges of the Ring of Fire. Even though the Ring of Fire includes three continents, the volcanoes in Asia tend to be the most active.Full Answer >
Pyroclastic flows are enormous ejections of debris from erupting volcanoes. They consist of large rocks and smaller particles of ash and dust that travel across the surrounding landscape at tremendous velocity.Full Answer >
Composite volcanoes, also known as stratovolcanoes, typically have a conical shape with steep sides and a central vent leading up to a crater at the summit. Stratovolcanoes have a symmetrical appearance because alternating flows of lava and ash build up the sides layer by layer.Full Answer >
The state with the largest number of volcanoes is Alaska. Out of the 169 volcanoes in the United States, more than 130 volcanoes and volcanic fields are located in Alaska.Full Answer >