Question

If you found an igneous rock whose crystals were roughly the same size and visible without magnification, which of these textures could describe the rock? Select all that apply.
A. aphanitic
B. phaneritic
C. pegmatitic
D. porphyritic

Answer 1

hang on.

Answer 2

aphanitic means "invisible", certain igneous rocks that are so fine-grained that their component mineral crystals are not detectable by the unaided eye. So not a.

Answer 3

not d.

Answer 4

A pegmatite is a holocrystalline, intrusive igneous rock composed of interlocking phaneritic crystals usually larger than 2.5 cm in size; such rocks are referred to as pegmatitic.

Answer 5

c. the answer is C.