Lava flows are the remains of hot lava (molten rock) that erupts from a volcano and flows over the land.
When a volcano erupts, the lava is intensely hot, with red fire flames and hot flowing streams of lava. The lava burns everything it touches – trees, shrubs, bushes, plants, and the soil. The lava flow can spread for kilometres. When the lava flow cools, the molten rock is black, and it leaves the area black for hundreds of years.