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