This is basalt, a black volcanic rock that forms when lava cools and hardens. It’s known for being very hard, resistant to heat, and durable, which is why it’s commonly used in road construction. In fact, the small stones mixed into the asphalt roads we walk and drive on are usually made of basalt. Even though it’s a strong material, basalt is also brittle. That means it can break easily if there’s a small crack. With the right technique, a worker can split a large piece of basalt using only a l

Basalt - the composition of the lava erupting from the most recent volcano in Iceland. I LOVE lava ❤️🥰🌋, especially basalt. It forms when you have partial melting of the mantle. The melt is basaltic in composition… it’s light and buoyant and wants to make its way to the surface Finding the easiest path to get there. It’s seeps through the crust with cracks towards the surface, some crystallising in intrusive volcanic settings, such as magma chambers, dykes and sills. For the magma, that does m