A volcano is an opening in the Earth's crust through which molten rock, ash, gases, and steam erupt. When molten rock, called magma, is beneath the surface, it rises and is expelled during an eruption, at which point it is called lava. Volcanic eruptions can create mountains as lava and ash accumulate around the vent with each eruption. Volcano Activity : Active, Dormant, Extinct. Eruption: The process of a volcano releasing material from the Earth's interior. Magma vs. Lava: Magma is molten roc
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VOLCANO FORMATION (Volcanology) INTRODUCTION Volcanology is the scientific study of volcanoes, lava, magma, and related geological phenomena. A volcano is an opening in the Earth’s crust through which molten rock (magma), gases, and ash escape from beneath the surface. FORMATION OF VOLCANOES 1. HEAT AND PRESSURE IN THE MANTLE: Deep within the Earth, high temperatures and pressures cause rocks to melt, forming magma in the mantle. 2. MAGMA MOVEMENT: Because magma is less dense than the surroundin
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