Rocks that contain crystals that are roughly equal in size and can be identified with the unaided eye are said to exhibit a ________ texture.
A) fine-grained
B) glassy
C) coarse-grained
D) porphyritic

Question

Quizplus · Accepted Answer

Coarse-grained texture is characterized by crystals that are roughly equal in size and can be identified with the unaided eye. Fine-grained texture refers to crystals that are too small to be identified without a microscope. Porphyritic texture contains both large and small crystals. Glassy texture lacks crystals altogether.

Rocks That Contain Crystals That Are Roughly Equal in Size