What are basalts rocks?

Question

What are basalts rocks?

Answer 1

It's a fine grain (dark) rock that makes up most of our oceanic crust. They are also extrusive igneous rocks, because these rocks are formed from lava (liquid that forms by cooling and then hardening into rock during an erruption)

Answer 2

Basalt is fine grained extrusive (formed at or very near the surface of the earth) igneous rock, rich in ferromagnesian minerals.

Answer 3

Basalt is a common mafic extrusive volcanic rock. It is usually gray to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or gray.