Molten rock underground, usually rich in silica and containing dissolved gases, is called Magma.
What is Rock?
Mineral particles that have developed or become fixed together to form a solid mass are called rocks. It depends on the rock as some are big in size, and some tend to be small. Rocks can be classified as igneous, sedimentary, or metamorphic.
Magma is covered with molten rock that is often silica-rich and contains dissolved gases on beneath Earth's surface. Mantle rock melting results in the formation of magma. Tectonic plates which constitute the Earth's crust, can gradually fall apart and cause magma to rise.
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