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Author Question: How is magma generated along subduction zones? A) Decompression melting of the mantle from weight ... (Read 71 times)

moongchi

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on: Jul 16, 2018
How is magma generated along subduction zones?
 
  A) Decompression melting of the mantle from weight reduction.
  B) Fluids are dehydrated out of the descending plate, which lowers the melting point of the surrounding mantle.
  C) Friction from colliding plates melts mantle material.
  D) Radioactive decay melts mantle material.

Question 2

Which of the following changes are not evidence of migrating magma?
 
  A) Changes in the pattern of earthquakes produced by moving magma
  B) Molten rock flowing down the flank of a volcanic cone
  C) Increase in ground temperature
  D) Changes in the volcanic gases released from the volcano


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bookworm410

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: B


moongchi

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Reply 2 on: Jul 16, 2018
Gracias!

mohan

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Reply 3 on: Yesterday
Excellent

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