___ is a coarse-grained igneous rock (grains 1 mm diameter) with visible grains of quartz.
A) Gabbro
B) Granite
C) Basalt
D) Peridotite
E) Andesite

Question

___ is a coarse-grained igneous rock (grains > 1 mm diameter) with visible grains of quartz.
A) Gabbro
B) Granite
C) Basalt
D) Peridotite
E) Andesite

Quizplus · Accepted Answer

Granite is a coarse-grained igneous rock that contains visible grains of quartz. Gabbro is also coarse-grained, but does not contain quartz. Basalt and andesite are both fine-grained igneous rocks, meaning their grains are smaller than 1 mm diameter. Peridotite is a coarse-grained igneous rock, but it does not contain visible grains of quartz.

___ Is a Coarse-Grained Igneous Rock (Grains > 1 Mm