What is the end product (highest grade) reached by subduction zone metamorphism of basalt?
A) granulite
B) gneiss
C) eclogite
D) gabbro pegmatite

Question

Quizplus · Accepted Answer

Eclogite represents the high-pressure metamorphic rock that forms at great depths in the Earth's crust, typically in subduction zones where oceanic crust is forced deep into the mantle. Basalt, being a primary component of oceanic crust, can metamorphose into eclogite under these extreme conditions.

What Is the End Product (Highest Grade) Reached by Subduction