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Author Question: Why would decompression of the mantle cause the production of mafic magma? A) Mafic magma is ... (Read 130 times)

nramada

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on: Jul 16, 2018
Why would decompression of the mantle cause the production of mafic magma?
 
  A) Mafic magma is produced at high pressures.
  B) With less pressure comes higher melting points.
  C) Mafic magma is produced at low pressure.
  D) With less pressure comes lower melting points.

Question 2

Volcanoes are present at convergent plate boundaries because
 
  A) the plates rub together, causing friction and heat.
  B) water is carried down with the subducting plate and causes the mantle to melt.
  C) heat from the inner mantle travels up along the subducting plate.
  D) decompression melting due to decreased pressure at the boundary causes the mantle to melt and rise into volcano formations.


nixon_s

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

Answer: D

Answer to Question 2

Answer: B


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