Author Question: What substance makes ion migration easier in the later stages of magma crystallization, which allows ... (Read 45 times)

Davideckstein7 · **on:** Jul 16, 2018

What substance makes ion migration easier in the later stages of magma crystallization, which allows abnormally large mineral crystals to form and create pegmatites?

A) Water
B) Oxygen
C) Silica
D) Iron

Question 2

________ is a felsic igneous rock with a meringuelike vesicular texture, consisting of very small holes, created by small shards of volcanic glass.

A) Scoria
B) Obsidian
C) Granite
D) Pumice