Which of the following metamorphic rocks can be either foliated or phorphyroblatstic,but not granoblastic?
A)hornfels
B)marble
C)granulite
D)gneiss

Question

Quizplus · Accepted Answer

Gneiss can exhibit either foliated or porphyroblastic textures, distinguishing it from rocks like hornfels, marble, and granulite, which are typically associated with granoblastic textures. Foliation in gneiss is characterized by the parallel alignment of minerals, while porphyroblasts are large, singular crystals that grow in a finer matrix, both of which can occur in gneiss due to varying conditions of pressure and temperature during metamorphism.

Which of the Following Metamorphic Rocks Can Be Either Foliated