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Geo Lecture 8: Volcanism & Volcanic Hazards Volcano calculator architecture and eruption style Magma may crystallize at depth in the Earth (intrusive fervent rock) or extrude from a vent-hole as lava or pyroclastic detritus (both extrusive igneous rock) Magma from a magma sleeping room reaches the go forth either by means of a vertical lamp chimney to the crater at the top, or through long cracks called fissures where the lava erupts from a vent along the flanks of the volcano. Eruptions from the crater argon called summit eruptions whereas eruptions along the flanks argon called flank eruptions or fissures eruptions. organisation of Magma source of the personification and eruption style of volcanoes All magma are different. They each be in possession of a distinctive chemical substance makeup, base on their contingent tectonic setting and their pathways upward toward the surface. The closely important chemical component is the relative amount of silicon diox ide (SiO2). Magmas are terrific on the basis of their silica (SiO2) content. *The shape of a volcano and the composition of the lava or pyroclastic debris that is erupted is at present related to to its silica content. Silica controls the viscousness of the magma within the chamber viscosity is simply a measure of a legatos resistance to f gist. (ex.

Water has small resistance, indeed low viscosity; honey has high resistance, consequently high viscosity). Magma consists of 1) the liquid execute, 2) any solid crystals of minerals that might have formed from the resolve as it cooled, and 3) abundant gas es such as H20, CO2, SO2, and H2S. -up to 9! % of a magmas composition may consist of gases -These gases are highly important since they provide the gas pressure that drives the explosive impression of volcanic eruptions. (The more gases trapped in the magma, the more powerful the potential eruption.) -The higher the viscosity, the greater the concentration of trapped gases and thus the higher the potential exclusivity of eruption. 1) Low-silica magma the lower the silica content, the...If you want to befall a full essay, order it on our website: BestEssayCheap.com

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