Large crystal formations in igneous rocks typically indicate that the rock cooled slowly deep beneath the surface. This slow cooling allows crystals to grow larger, as they have more time to form before the molten rock solidifies. In contrast, if the rock cooled quickly near the surface, it would generally produce smaller crystals or a glassy texture.
Large crystal formations in igneous rocks reveal what about the conditions that formed the crystals?
that it cooled slowly deep beneath the surface
that it is made of a mineral that forms into crystals
that is cooled quickly near the surface
that it cooled slowly under water
1 answer