Basalttikivet

Basalttikivet is a geological term referring to basaltic rocks. Basalt is a common extrusive igneous (volcanic) rock formed from the rapid cooling of basaltic lava exposed at or very near the surface of a terrestrial planet or a moon. It is typically black or dark gray in color due to its mineral composition, which is rich in pyroxene and plagioclase feldspar. Basalt is characterized by its fine-grained texture, a result of the rapid solidification of lava.

The formation of basalttikivet is a significant process in volcanology and plate tectonics. It commonly occurs at mid-ocean ridges, where tectonic plates diverge and magma rises to the surface. It is also found in large igneous provinces, which are areas of massive volcanic activity that can cover vast regions. Volcanic islands, such as Hawaii, are largely composed of basalt.

Basalttikivet has various applications. Due to its durability and density, it has been used historically as building material and for paving roads. Crushed basalt is widely used as aggregate in concrete and for road construction. In some regions, basalt fibers are produced and used in insulation and composites. The study of basalttikivet provides insights into the Earth's mantle, volcanic processes, and the geological history of planetary bodies.