If a lava flow at Earth's surface has a basaltic composition, then the rock type that would flow is a basalt. This is because the rock would rapidly cool resulting a rock that is fine grained texture. Basalt is a rock that is dark in color and has a fine texture. It is primarily made up of pyroxene and plagioclase minerals. Most of this type of rock is found on the ocean basins of the Earth's surface. Due to its abundances, it has a wide different uses. Typically it is used as an aggregate in construction needs. It used as road base, asphalt aggregate, concrete aggregate and railroad ballast. Also, this rock is very abundant in the moon and in mars.
