Igneous rocks with a texture that is so fine-grained that the crystals are too small to see are ____.
A)aphanitic
B)porphyritic
C)glassy
D)phaneritic
E)pyroclastic

Question

Quizplus · Accepted Answer

Aphanitic texture is characterized by fine-grained crystals that are too small to be seen with the naked eye. Porphyritic texture has both large and small crystals, glassy texture lacks crystal structure altogether, phaneritic texture has visible crystals, and pyroclastic texture is composed of fragments of volcanic rock.

Igneous Rocks with a Texture That Is So Fine-Grained That