​Volcanoes

A volcano is formed when the molten magma in the earth’s interior escapes through the crust by vents and fissures in the crust, accompanied by steam, gases (hydrogen sulphide, sulphur dioxide, hydrogen chloride, carbon dioxide) and pyroclastic material.

  • The magma that actually flows from the volcano is termed as Lava (molten rock). Lava, gases and tephra (pulverised rock and clastic materials ejected violently during eruption) pass through the vent to the surface and builds volcanic landforms.

Some Key Facts

  • Volcanoes along divergent boundaries are less violent and more fluid in nature. Granitic magma always cools ....
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Geography Of India