How vocanoes form

How vocanoes form

Download How vocanoes form




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Volcanoes form when hot material from below rises and leaks into the crust. This hot material, called magma, comes either from a melt of subducted crustal Most volcanoes are formed by the movement of tectonic plates on the surface of the earth. These plates are basically huge pieces of rock that 'float' on the How Do Volcanoes Form: A volcano is vent or opening on planet's surface which allows molten rock called magma, volcanic ash and gas to escape out onto its

Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits We saw that the magma produced at ocean ridges just hardens to form new crust material, and so doesn't produce spewing land volcanoes. There are a few Volcanoes form when magma reaches the Earth's surface, causing eruptions of lava and ash. They occur at destructive (compressional) and constructiveDeep inside Earth, between the molten iron core and the thin crust at the surface, there is a solid body of rock called the mantle. When rock from the mantle melts Earth's volcanoes occur because its crust is broken into 17 major, rigid tectonic Volcanoes can also form where there is stretching and thinning of the crust's

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