The Structure and Product of a Volcano

Volcanoes are caused by sudden movements occurring in the Earth’s interior. A volcano is a vent or an opening in the Earth’s crust from which hot magma erupts from the interior of Earth. The structure and Product of a Volcano are discussed below.

Structure of a Volcano

Vent: It is an opening from which hot magma flows out to the surface of the Earth. It is a circular pipe-like structure. Crater: It is a circular depression in the ground caused by volcanic activity.

Magma chamber: It is here that the hot magma is stored beneath a volcano.

Volcanic cone: A volcanic cone is formed when erupted fluid and semi-fluid material begins to cool down and solidify around the vent. It is a landform caused by volcanic eruptions.

Products of a Volcano

  • Lava is the magma (hot molten fluid) that comes out onto the surface of the Earth.
  • Pyroclasts are the solid fragments of rock pieces that come out on the surface of the Earth during a volcanic eruption. The finest rock particles are known as dust.
  • Lapilli are small stone-sized particles.
  • Gases erupted are hydrogen sulphide, sulphur dioxide, carbon dioxide, and hydrogen. A volcanic eruption is generally accompanied by steam.



Earthquakes are not associated with the weather but instead are natural disasters. An earthquake is a tremor below the surface of the Earth which causes shaking of the Earth’s crust. Read more

Folding and Faulting

Orogenic Processes include mountain building through severe folding and faulting. In folding, because the compressional forces act from two opposite sides towards the center. Read more

Landforms of the Earth

The surface of the earth is not the same everywhere. The earth has an infinite variety of landforms. Some parts of the lithosphere may be rugged and some flat. Read more

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