The mineral assemblage within metamorphic rock is ________.
A)always identical to that found within its protolith
B)dependent only on the mineral assemblage of its protolith
C)dependent only on the temperature and pressure of formation
D)dependent on both the mineral content of its protolith and the temperature and pressure of formation

Question

Quizplus · Accepted Answer

The mineral assemblage within metamorphic rock is dependent on both the mineral content of its protolith and the temperature and pressure of formation. While some minerals from the protolith may remain, new minerals may also form due to changes in temperature and pressure during metamorphism. Therefore, the mineral assemblage within metamorphic rock is not always identical to that found within its protolith and is not solely dependent on the mineral assemblage of its protolith.

The Mineral Assemblage Within Metamorphic Rock Is ________