Multiple Choice
Why is the regional metamorphism of ocean crust in a subduction zone considered separately from regular regional metamorphism?
A) Because this setting does not involve any strain deformation.
B) The ocean crust has no hydrous minerals to destroy or recrystallize.
C) Unlike regular regional metamorphism, this does not occur on plate margins.
D) Both the basaltic composition and very low geothermal gradient (Low T, Hi P) are unique and lead to different facies than seen in continental rocks.
Correct Answer:
Verified
Correct Answer:
Verified
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