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Author Question: Which part of the Vulcanist doctrine on the formation of rocks was incorrect? What will be an ... (Read 49 times)

dalyningkenk

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on: Jul 16, 2018
Which part of the Vulcanist doctrine on the formation of rocks was incorrect?
 
  What will be an ideal response?

Question 2

Explain how peridotite can melt at a divergent plate boundary without an increase in temperature.
 
  What will be an ideal response?


cupcake16

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

That sedimentary rock formed due to heating.

Answer to Question 2

Melting occurs because the melting temperature decreases with decreasing pressure. Peridotite in the mantle rises to a lower depth at divergent boundaries with little or no decrease in temperature. The lower depth corresponds to lower pressure. The lower pressure results in a lower melting point and the peridotite partly melts.


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