Lava is a solid version of what was once molten rock, now solidified on the earth’s surface. Icelandic lava rocks, with a basaltic composition, are good examples of rocks that exist in the Mid-Oceanic Ridge in the Atlantic. They come from different places in Iceland, including the Vestmann islands. The collection shows which type of rocks on the Mid-Oceanic Ridge were used to record results in modern geological research. These are volcanism, plate tectonics and paleomagnetism.