Luonnonkivilaji

Luonnonkivilaji refers to a type of rock that is formed through natural geological processes, as opposed to being artificially created. These rocks are classified based on their origin, composition, and texture. The three main categories of natural rocks are igneous, sedimentary, and metamorphic. Igneous rocks form from the cooling and solidification of molten rock, either magma below the Earth's surface or lava above it. Examples include granite and basalt. Sedimentary rocks are formed from the accumulation and cementation of mineral or organic particles, often in layers. Sandstone and limestone are common sedimentary rocks. Metamorphic rocks are created when existing rocks are transformed by heat, pressure, or chemical reactions, without melting. Marble, derived from limestone, and slate, formed from shale, are examples of metamorphic rocks. The study of these natural rock types is fundamental to geology and helps us understand Earth's history, its internal processes, and the distribution of natural resources. Different luonnonkivilajit have varying physical and chemical properties, which determine their suitability for construction, artistic purposes, and various industrial applications.