These gases are dissolved in the magma in the same

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several % gas by weight. These gases are dissolved in the magma in the same way that the carbon dioxide gas is dissolved in beer. 6. What volcanic gas is escaping from the Long Valley Caldera area? (page 200, para 4) The emission of carbon dioxide is escaping from the Long Valley Caldera area. 7. What are the most important constituents of volcanic gases and what chemical compounds do they tend to form? (page 203 para 1) The most important constituents of volcanic gases is hydrogen, followed by oxygen, carbon, sulfur, chlorine, and nitrogen. As these elements combine at the surface of the earth, they become water, carbon dioxide, sulfur dioxide, hydrochloric acid and nitrogen. 8. Why is sulfur not 50 times more prevalent at the Earth's surface than what the current rate of emission from volcanoes would predict? (page 204, para 1) Sulfur appears to be a special problem. At its current rate of emission from volcanoes, there should be 50 times more sulfur at the Earth’s surface than there is. The reason is iron sulfide- the common fool’s gold – as well as the plate tectonic process. Instead of being released into the ocean or atmosphere, sulfer reacts with iron and forms insoluble
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iron sulfide, which remains in the oceanic crust and is returned via subduction to the shallow interior of the Earth.
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Christopher Reinemann
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