Intrusive Volcanic Landforms

Two types of landforms are created by volcanic eruptions, Intrusive and Extrusive Landforms. intrusive landforms are formed in the Earth’s interior.

Intrusive Volcanic Landforms

  • Intrusive landforms formed due to volcanic eruptions are
  • Dykes: These are vertical intrusions of igneous rocks. They are formed when magma force the rock apart under the surface of the Earth.
  • Lopoliths: These are saucer-shaped intrusions which occur between the layers of sedimentary rocks.
  • Sill: A sill is a terrace-like feature which is formed between the beds of sedimentary or igneous rocks.
  • Batholiths: It is the large-sized intrusions in igneous rocks at great depths. They come out to the surface of the Earth during the mountain-building activity.
  • Laccoliths: These are dome-shaped intrusive landforms which forces the upper part of the rock to bulge upwards. The erosion and denudation of the Earth’s surface bring laccoliths to the surface of the Earth.
  • Phacolith: These are small structures which cool down and solidify near the crest of an anticlinal fold.


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

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