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 too small to be visible without a magnifying lens or microscope.
C)The mineral grains have glassy textures.
D)The rock is crystalline; mineral grains are of distinctly different sizes.

Question

Quizplus · Accepted Answer

Aphanitic texture refers to a fine-grained texture where mineral grains are too small to be visible without magnification. Therefore, option B is the best choice as it describes this texture accurately. Option A describes a fragmental texture, option C describes a glassy texture, and option D describes a porphyritic texture where mineral grains are of distinctly different sizes.

Which of the Following Best Describes an Aphanitic Texture