Waves through large basalt rock opening

View of sea foam created by large waves through a natural opening in volcanic rocks. Volcanic rock refers to a rock formed from magma that has solidified, at least in part, at the surface of the lithosphere. Volcanic rocks can solidify and form lava flows or pyroclasts. It is very frequently used in aquaria, both for its dark appearance (very dark red to almost black) and its meandering, tortured appearance, which makes it an excellent bacterial support. Also as a magmatic rock or an igneous rock. Magma (lava) solidifies on the earth's crust's surface to form extrusive or volcanic rocks following a volcanic eruption. Because cooling is much faster than in intrusive rocks, mineral ions cannot organize into large crystals, so volcanic rocks are fine-grained (crystals invisible to the naked eye), such as basalt, or completely amorphous (a glass-like texture), such as obsidian. In many volcanic rocks, you can see the holes left by the gas bubbles that escape as the magma solidifies. The volume of extrusive rock thrown up by volcanoes each year depends on the type of tectonic activity: divergent edges: 73%, such as ocean ridges, Iceland, and the East African Rift; convergent edges (subduction zones): 15%. Such as the Andes Mountains or the Pacific island arcs with hot spots (intra-plate volcanism): 12%, such as Hawaii. The most well-known volcanic rocks are andesite after basalt. Some are trachyte, rhyolite and dacite among others. Volcanic rocks are a small part of the rocks that come from magma. It is estimated that during the Cenozoic, an annual average of 3.7 to 4.1 km3 of volcanic rocks on Earth were generated, a much smaller amount than the 22.1 to 29.5 km3 of plutonic rocks that are estimated to have formed on average each year during the same period. Volcanic rocks can be divided into those that have no crystals visible to the naked eye, i.e., they have an aphanitic texture, and those that have crystals visible to the naked eye, i.e., of phaneritic texture. When there are large crystals (phenocrysts) that stand out in the matrix, it is called porphyritic or porphyritic texture. Volcanic (basalt) rocks are omnipresent in the south of Mauritius all along the coast.