Which igneous texture indicates two, distinctly different sizes of mineral grains?
A) aphanitic
B) phaneritic
C) glassy
D) porphyritic

Question

Quizplus · Accepted Answer

Porphyritic texture in igneous rocks is characterized by two distinctly different sizes of mineral grains: larger crystals, known as phenocrysts, embedded in a finer-grained matrix or groundmass. This texture forms as a result of variations in the cooling rate during the crystallization of the magma.

Which Igneous Texture Indicates Two, Distinctly Different Sizes of Mineral