Basalt is a common dark, fine-grained volcanic rock formed from the rapid cooling of lava at or near Earth's surface. This igneous rock comprises the vast majority of oceanic crust and is a fundamental component of our planet's geology.
Basalt is a common dark, fine-grained volcanic rock formed from the rapid cooling of lava at or near Earth's surface. This igneous rock comprises the vast majority of oceanic crust and is a fundamental component of our planet's geology.