Molten Igneous Rock is a type of rock formed from MAGMA, which is molten material that originates from the Earth's mantle and is composed of melted minerals and gases. MAGMA is the source material for all igneous rocks, and when it cools and solidifies, it forms Molten Igneous Rock. This type of rock is found in many places around the world, including volcanoes, hot springs, and geothermal areas. It is also used in construction and other industries.