Which of the following best describes an aphanitic texture?
A) The rock consists of broken, volcanic- rock and mineral fragments.
B) The rock is crystalline; mineral grains are of distinctly different sizes.
C) The rock is crystalline; mineral grains are too small to be visible without a magnifying lens or microscope.
D) The mineral grains have glassy textures.

Question

Quizplus · Accepted Answer

Aphanitic texture refers to a fine-grained igneous rock texture in which the individual mineral grains are too small to be seen with the naked eye. This is typically the result of rapid cooling of lava or magma, which does not allow large crystals to form.

Which of the Following Best Describes an Aphanitic Texture