Extrusive Volcanic Landforms

Two types of landforms are created by volcanic eruptions, Intrusive and Extrusive Landforms. Extrusive landforms are formed on the surface of the Earth.

Extrusive Volcanic Landforms

  • Extrusive landforms formed due to volcanic eruptions are
  • Conical hill: A cone-shaped hill is a typical example of an extrusive landform.
  • Cone: A cone is formed when rock materials and debris are thrown away by a volcanic eruption.
  • Crater: It is a bowl-shaped depression formed at the mouth of a volcano. It is formed due to the repeated eruption of a volcano.
  • Caldera: Because of the repeated eruption of a volcano, its summit may be blown away a number of times. In its place a large depression called caldera is formed.
  • Composite cone: When a volcano throws away both lava and large fragments of rocks during eruption, multiple layers of these two materials build up, resulting in the formation of a composite cone.
  • Volcanic shield: When lava gets solidified after flowing away from the vent, it forms a broad summit with a gentle base leading to the formation of a volcanic shield.
  • Lava plateau: A plateau is formed when a volcano constantly erupts over a long time at frequent intervals over a large area throwing away lava and fragments of rocks (pyroclasts). The Deccan Plateau is one such example.


The Structure and Product of a Volcano

Earth’s crust from which hot magma erupts from the interior of Earth. The structure and Product of a Volcano are discussed below.

Causes of Volcanic Eruption

Causes of Volcanic Eruption – Presence of heat and pressure in the Earth’s interior, Movement of tectonic plates, Magma chamber

Classification of Volcanoes With Examples

Classification of volcanoes based on the frequency of eruptions and Classification of volcanoes based on shape are discussed below


A volcano is a vent or an opening in the Earth’s crust from which hot magma erupts from the interior of Earth. Volcanoes are generally caused because of the following reasons. Read more

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