A __________ forms at very high pressures but moderately low temperatures associated with subduction of oceanic crust and sediments.
A) blueschist
B) biotite marble
C) migmatite
D) mylonite

Question

Quizplus · Accepted Answer

Blueschist forms under high-pressure and low-temperature conditions, typically associated with the subduction zones where oceanic crust is forced down into the mantle. These specific conditions lead to the formation of glaucophane, a blue amphibole, which gives the rock its characteristic blue color and name.

A __________ Forms at Very High Pressures but Moderately Low