![]() As the plate moves away from the hotspot, a new volcano island will form. They are caused by a static source of magma, often away from plate margins. ![]() Hotspots are places where the magma rises up through the crust. Eruptions tend to be often or continuous and mostly gentle.Īn example of a shield volcano is Kilauea, in Hawaii.Tall narrow volcanoes with symmetrical sides. They have gently sloping sides because the lava is thin and runny so it moves far before it solidifies. Stratovolcano: Alternating layers of lava, ash, and cinders.Shield volcanoes are usually found at constructive margins or over a hotspot.They are steep-sided as the thick and heavy lava doesn't flow very far before it cools.Įxamples of composite volcanoes are Mt Unzen in Kyushu, Japan, and Mt Etna in Sicily, Italy.It moves at very high speeds and has high temperatures (400☌). This is a deadly mixture of hot steam, ash, rock and dust. The eruptions from these volcanoes may be a pyroclastic flow.Eruptions are infrequent, but mostly violent and can include volcanic bombs.They are usually found at destructive margins.Composite volcanoes are made up of alternating layers of lava and ash.Sometimes eruptions are explosive and lava is thrown out as volcanic bombs. When a volcano erupts there can be lava, ash, steam or gaseous emissions. cone - this is formed from the material ejected during eruptions and grows in size with each eruption.crater - this is found at the top of the volcano and the magma usually erupts from here.Along with molten rock, volcanoes also release gases, ash, and solid rock. secondary vent - some magma may escape through the side of the volcano, particularly if the main vent becomes blocked A volcano is a feature in Earth's crust where molten rock is squeezed out onto the Earth's surface.main vent - this is the channel through which magma rises to reach the Earth's surface Media in category 'Diagrams of shield volcanoes' The following 13 files are in this category, out of 13 total. ![]()
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