How will mantle-derived magma change when it ponds against crustal rocks?
What will be an ideal response?
Answer: Crustal rocks at the crust-mantle boundary are already close to their melting point. Contact with the hotter mantle-derived magma will result in melting of the crustal rocks. The two melts will mix, producing a magma that is more silica-rich and lower in density.
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Indicate whether the statement is true or false
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