A metamorphic rock that is described as porphyroblastic has
A)original igneous rock textures.
B)abundant equant minerals.
C)large crystals in a fine-grained matrix.
D)no preferred alignment of minerals.

Question

Quizplus · Accepted Answer

Porphyroblastic texture in metamorphic rocks is characterized by large crystals, known as porphyroblasts, embedded in a finer-grained matrix. This texture results from the growth of certain minerals in the rock during metamorphism, which can outpace the growth of the surrounding minerals, leading to the formation of noticeably larger crystals within a finer-grained background.

A Metamorphic Rock That Is Described as Porphyroblastic Has