A vol back endo can be simply defined as a set out on the Earths surface where hot dissolve controversys called magma breaks through and through. In other words, volcano is a vent or chimney that connects molten rocks or magma from within the Earths crust to the Earths surface. Some of the well-known volcanic eruptions happened in Mount Krakatoa, Mount Pinatubo and Mount St Helens. A volcanic eruption originates from the magma contained in the Earths crust. When the magma builds up compel and the Earth is always spinning, sometimes a crack pull up stakes happen in the Earths surface. Therefore when magma bursts through this crack, this is called a volcanic eruption. Volcanoes can be classified into terce categories, mainly an active volcano, a dormant volcano and an out(p) volcano. In general, a volcano is classed as active if it erupts lava, rocks, ashes or if it shows seismic activity, A dormant volcano means that it has non erupted for less than one million years, but could erupt once more one day. An extinct volcano means it result never erupt again.
Volcanoes are remainsed differently in shapes and sizes, with conical volcanoes being the most common ones. One theory why volcanic eruption happens is the theory of plate plate tectonic theory.
Plate tectonics are huge irregularly shaped slab of solid rock composed of continental and oceanic lithosphere. These plates, which are floating on molten rock magma, walk outs relatively to one another at about a few inches per year. When two plates collide, one of the plates will go under the other plate, causing a detrition in the Earths crust. This friction will form a pressure which will cause underlying rocks to fly the coop and make the magma to rise. Lava will be expelled from the mountaintop. Volcanic eruption can also happen when two layers of plate tectonics move away from each other. A gap will be formed and lava will rise through this gap. This type of volcanoes happens on the ocean bed and not...If you want to get a plenteous essay, order it on our website: Ordercustompaper.com
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