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Most composite volcanoes have a crater at the summit which contains a central vent or a clustered group of vents. Lavas either flow through breaks in the crater wall or issue from fissures on the flanks of the cone. Lava, solidified within the fissures, forms dikes that act as ribs which greatly strengthen the cone. The essential feature of a composite volcano is a conduit system through which magma from a reservoir deep in the Earth's crust rises to the surface. The volcano is built up by the accumulation of material erupted through the conduit and increases in size as lava, cinders, ash, etc., are added to its slopes. When a composite volcano becomes dormant, erosion begins to destroy the cone. As the cone is stripped away, the hardened magma filling the conduit (the volcanic plug) and fissures (the dikes) becomes exposed, and it too is slowly reduced by erosion. Finally, all that remains is the plug and dike complex projecting above the land surface -- a telltale remnant of the vanished volcano.

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7y ago
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7y ago

Composite volcanoes, also called strato volcanoes, are cone shapes formed by alternating layers of lava and rock fragments. This is the reason they are called composite.

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13y ago

They're curved like the surface of a sphere, formed by layers of lava and rock fragments, erupt exclusive way caused by the viscous magma. They're large and pyramid like. Please don't copy this, it's illegal you know. Please put this in your own words okay, if you do, I'll call the police on you, okay?

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9y ago

Most composite volcanoes volcanoes have a crater at the summit which contains a central vent or a clustered group of vents.

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14y ago

concave sides.

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Q: What is the composite volcanoes shape?
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The three different types of volcanoes include the following; shield volcanoes, composite volcanoes, and the cinder cone volcanoes. These all have their names because of the size and shape of the out rocks of the actual volcano itself.


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