Composite Volcano

Question 1

Give an example of a composite volcano.
1486 m 
Eurasian and Philippine plate
Luzon volcanic arc
Subduction

Answer 1

Mount Pinatubo in the Phillipines in Asia is a 1,486 m tall composite volcano located at the plate boundary between the Eurasian and Philippine plate and is one of a chain of volcanoes known as the Luzon volcanic arc, which is the result of the oceanic Philippine plate being sub ducted under the lighter continental Eurasian plate.

Question 2

What does it give off?

Answer 2

Gives out huge volcanic rock bombs and sulphur dioxide gas.
Composite volcanoes erupt with great violence­ over time pressure builds in the magma chamber as gases, under immense heat and pressure, are dissolved in the liquid rock. When the magma reaches the vents the pressure is released and the gases explode because they form in a system of vents, Composite volcanoes may blow out the sides of the cone as well as the summit crater.

Question 3

Why is the volcano slightly offset from the plate boundary?

Answer 3

The volcano is slightly offset from the plate boundary because when the Oceanic plate is sub ducted it is melted and forced away as molten magma by the high pressures exerted on it.
It then resurfaces as the density of the molten magma becomes lower than that of the rock, and so it pushes it up through the small cracks and explodes out through a volcano.

Question 4

Describe it

Answer 4

Composite volcanoes are a type of landform produced as a result of the building up of layers of alternating lava flow, ash and blocks of unmelted stone that are formed over hundreds of thousands of years through multiple eruptions. This significantly impacts the environment around it as the eruptions that build up the composite volcano, layer upon layer can eventually lead to it towering thousands of meters tall rising up to 8,000 feet.
Composite volcanoes result from a system of vents leading from a deep reservoir that holds all of the magma beneath the surface of the Earth’s crust. When the volcano is dormant, they typically they have steep concave sides with a relatively small crater at the top.