A dark-colored igneous rock with no visible crystals cooled:
A) slowly in a magma chamber.
B) quickly in a magma chamber.
C) slowly on the Earth's surface.
D) quickly on the Earth's surface.
E) none of the these

Question

Quizplus · Accepted Answer

Dark-colored igneous rocks that cool quickly on the Earth's surface, forming fine-grained textures without visible crystals, are typically basaltic in composition. This rapid cooling does not allow large crystals to form.

A Dark-Colored Igneous Rock with No Visible Crystals Cooled