GEOLOGY

Detailed explanation-1: -A volcano is an opening in a planet or moon’s crust through which molten rock and gases trapped under the surface erupt, often forming a hill or mountain.

Detailed explanation-2: -Volcanoes are mountains but they are very different from other mountains; they are not formed by folding and crumpling or by uplift and erosion. Instead, volcanoes are built by the accumulation of their own eruptive products–lava, bombs (crusted over ash flows, and tephra (airborne ash and dust).

Detailed explanation-3: -The volcanic mountains are formed by solidification of lava ejected from the Earth’s surface. The constant ejection and solidification of lava leads to the formation of a cone around the volcano known as the volcanic mountains.

Detailed explanation-4: -The most well-known types of volcanoes are cinder cones, composite volcanoes (stratovolcanoes), and shield volcanoes.