A________ forms at very high pressures but relatively low temperatures associated with subduction of oceanic crust and sediments.
A) blueschist
B) sillimanite bearing marble
C) migmatite
D) mylonite

Question

Quizplus · Accepted Answer

Blueschist forms under high-pressure, low-temperature conditions typically found in subduction zones, where oceanic crust is forced down into the mantle. This unique environment leads to the formation of the characteristic blue-colored minerals that give blueschist its name.

A________ Forms at Very High Pressures but Relatively Low Temperatures