Which of the sites shown in this figure have decompression melting in an oceanic setting?
A)A
B)B
C)C
D)all of the locations shown
E)locations A and B only

Question

Which of the sites shown in this figure have decompression melting in an oceanic setting? 
A)A 
B)B 
C)C 
D)all of the locations shown 
E)locations A and B only

Quizplus · Accepted Answer

Locations A and B represent areas where two plates are moving apart from each other, creating a divergent boundary. As the plates move apart, the pressure on the underlying mantle decreases, causing it to melt and rise to the surface, resulting in decompression melting. Therefore, locations A and B have decompression melting in an oceanic setting. Location C is a subduction zone, where one plate is being forced beneath another, causing melting due to the heat and pressure from the subducting plate.

Which of the Sites Shown in This Figure Have Decompression