Yellowstone Volcano has produced huge pyroclastic flow deposits several times in

Question

Yellowstone Volcano has produced huge pyroclastic flow deposits several times in the past 2.1 million years. Describe the general features of an eruption that produces pyroclastic flows. What is the composition of the magma that erupts at Yellowstone? Explain in detail how an eruption of Yellowstone proceeds, starting with magma starting to leave the magma chamber and rise towards the surface, and ending with what happens once the eruption occurs to produce a pyroclastic flow. Your answer must include the words

Explanation / Answer

pyroclastic flow is the flow of hot gas and rock with very high velocity. it has a high viscosity too. the speed depends on the density of the current. this flow is a type of gravity current. there are several reasons for this flow.gravitational collapse of the lava dome, collapse of the eruption coulumn, the directional blast etc. in many cases the volcanic material mix with the water below which result in the water converting into steam and resulting into blast. after erupting for a long period of time, they reach the saturstion point whereby the volcano cease to exist for a duration. the inner temperature reaches so high that the iron ore and other minerals eventually liquify and in some cases vapourise into volatile gases which are poisonous. due to trhe presence of the air in the bottom of the crust , there are formations of air pockets or bubbles within the magma which flow out in the form of lava.

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