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Author Question: The most violent volcanic explosions are generated from A) basaltic lava flows. B) andesitic ... (Read 59 times)

dmcintosh

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on: Jul 29, 2018
The most violent volcanic explosions are generated from
 
  A) basaltic lava flows.
  B) andesitic lava flows.
  C) granitic lava flows.
  D) ocean floor lava flows.

Question 2

What does partial melting have to do with silica content of a magma?
 
  What will be an ideal response?


diana chang

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: Partial melting produces magmas with a higher silica content than the parent rock because the high silica content minerals are the first to melt and the lower silica content minerals are left unmelted.


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