________is characterized by very coarse mineral grains.
A)Obsidian
B)Pegmatite
C)Pumice
D)Granite

Question

Quizplus · Accepted Answer

Pegmatite is a type of igneous rock that is characterized by very coarse mineral grains, with a size greater than 2.5 centimeters. The grains in pegmatite can be so large that they are visible to the naked eye. Obsidian and pumice, on the other hand, are types of volcanic glass and have no visible mineral grains. Granite can have visible mineral grains, but they are generally smaller than those found in pegmatite.

________Is Characterized by Very Coarse Mineral Grains