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Volcano Vocab

QuestionAnswer
Shield Volcano Not very steep
Composite Volcano Large symmetrical cones. Make explosive eruptions
Cinder Cone Volcano small cone-shaped volcanoes with steeply angled sides
Lava Dome Volcano Lava is too thin to flow a great distance.
Secondary Vent Magma can reach the surface in other areas
Island Arc a curved chain of volcanic islands located at a tectonic plate margin, typically with a deep ocean trench on the convex side
Hot Spot hot spots in the mantle
Magma Chamber Large underground pool of molten rock sitting underneath the Earth’s crust
Volcanic Pipe Giant pipe going down the middle of the volcano
Main Vent The weak point in the Earth’s crust where hot magma rises from the magma chamber and reaches the surface.
Crater circular basin or depression in the top of the volcano
Pyroclastic Flow fast-moving current of hot gas and rock that moves away from a volcano
Caldera a large basin-like depression resulting from the explosion or collapse if the center of a volcano
Volcanic Neck narrow end of the volcano
Igneous Intrusion when lava becomes igneous rock.
Dike vertical igneous rock
Sill Same as dike just horizontally
Rift Valley made by seafloor spreading
Mid-Ocean Ridge a mountain range underwater that is caused by diverging plates
Volcanic Ash the ash that comes out of a volcano
Volcanic Bomb Large projectiles thrown through the air
Dormant Volcano quiet now might erupt again
Extinct Volcano unlikely to ever erupt again.
Created by: Reid O
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