Volcanoes and Earth

Influence of Volcanic Gas and Earth System on Volcanic Gas Most of atmospheric gases originally come from inside the earth. The gas in the magma dissolves by the high pressure of the surface of the earth, but the surface pressure decreases and the dissolved gas expands and escapes. As the volcano erupts, gases such as sulfur dioxide, carbon dioxide, chlorine, argon, sulfur, carbon monoxide, fluorine, and water vapor are released into the atmosphere. Many of the gases released during a volcanic eruption may help the Earth, but many gases can damage the Earth system.

Shield volcano is the largest volcano on the earth and actually looks like a volcano (in other words, it does not calculate the flow of the flood basalt). Hawaiian Shield Volcano is the most famous example. Shield volcano is almost completely basalt, and it is a lava flow which flows very much during the eruption. For this reason, these volcanoes are not steep (you can not accumulate fluids that tend to flow down the mountain). If water enters the crater in some way, the shield volcanic eruption will only explode. . Shield volcano is the result of high magma supply rate; from the moment of occurrence, lava is very hot with little change. Shield volcanoes are a common product of hot volcanic activity, but they can also be found along volcanic arcs associated with subduction or all alone.

The crater is an opening exposed on the surface of the Earth that releases the volcanic material. Every volcano has a central vent under the crater of the volcanic peak. The volcanic cone structure or building is constructed by a nearly symmetrical collection of lava and / or pyroclastic material surrounding this central ventilation system. The central spout leads deep into the magma reservoir. Magma reservoir is the main storage place for eruptive substances. As volcanic flanks are inherently unstable, they typically include a crack that descends towards a central vent or a shallow horizontal magma reservoir. Such cracks sometimes work as conduits to erupt magma sources and erupt along the sides of volcanic buildings. These volcanic eruptions can produce cones of volcanic material called parasitic cones.