VOLCANOES
Volcanoes are usually conical mountains built around a vent.
A vent is a fissure in the earths crust through which molten lava and gases erupt.The magma erupted by a volcano comes from the earths mantle and reaches the crust passing through cracks in the earth`s crust
Types of volcanoes
●Active volcanoes
●Dormant volcanoes
●Extinct volcanoes
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