During vulcanicity, various types of substances are erupted from inside the earth’s surface. Hot liquid substances, rock segments, lapilli, various gases, etc. are the major ones among them.
All these substances can be mainly classified into the following parts:
1. Gases and Water Vapour: Along with the eruption of volcano, water vapour, and gases such as carbon dioxide, sulpher dioxide, carbon monoxide, hydrogen chloride, ammonium chloride and other gases are evolved.
2. Solid Material: Large – sized rock segments along with minute ash and dust are evolved from the volcano.
3. Liquid Material: The entire molten rock material inside the earth’s surface is known as magma and when it comes out from the volcano on the earth’s surface, it is known as lava.
