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Author Question: What role do water and other volatiles play in the formation of magma? What will be an ideal ... (Read 95 times)

DelorasTo

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on: Jul 14, 2018
What role do water and other volatiles play in the formation of magma?
 
  What will be an ideal response?

Question 2

Are volcanoes in the Ring of Fire generally described as quiescent or violent? Name an example that supports your answer.
 
  What will be an ideal response?


mceravolo

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Reply #1 on: Jul 14, 2018
Answer to Question 1

Water and other volatiles act as salt does to melt ice. Water causes rock to melt at lower temperatures. At a depth of about 100 kilometers, the addition of water lowers the melting temperature of mantle rock sufficiently to trigger partial melting.

Answer to Question 2

Ring of Fire volcanoes are violent. Mount Fuji in Japan and the Cascades are all around the Ring of Fire.


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