![]() ![]() These circular mounds protrude from volcanoes because of the slow release of viscous lava. When lava is too thick and sticky, it piles up around the vent and forms a dome. On exit, they cool down and become extrusive igneous rocks. These molten rocks are thrown out from a volcano and are at least 66mm in size. Lava flows are the molten rock that oozes onto the Earth’s surface after a volcano eruption. When this type of magma erupts, lava flows outside the volcano. If magma is thin and runny, gases can escape easily from it. Eventually, some of the magma pushes through vents creating a volcanic eruption. Magma is lighter than the solid rock around it, so it rises. It collects in magma chambers on average 1 to 10 km below the surface. When rocks become so hot, they can become a substance called magma. ![]() Volcanoes are often considered as one of the most destructive forces on Earth.īut do you know the anatomy of a volcano?įrom tephra to volcanic bombs, it’s time to explore the 13 parts of a volcano. ![]()
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