Kivilajeja

Kivilajeja is a term in Finnish that translates to "types of rock" or "rock types." It broadly refers to the classification of rocks based on their origin, composition, and structure. Geologists categorize rocks into three main groups: igneous, sedimentary, and metamorphic.

Igneous rocks are formed from the cooling and solidification of molten rock, either magma beneath the Earth's surface or lava erupted onto the surface. Examples include granite and basalt. Sedimentary rocks are formed from the accumulation and cementation of mineral and organic particles on the Earth's surface, often in bodies of water. Sandstone and limestone are common examples. Metamorphic rocks are created when existing rocks are transformed by heat, pressure, or chemical reactions. Marble and slate are examples of metamorphic rocks.

The study of kivilajeja involves understanding the processes that create and alter these rock types. This includes analyzing their mineral content, texture, and the geological history they represent. Identifying kivilajeja is crucial for various scientific disciplines, including geology, paleontology, and environmental science, and has practical applications in fields such as construction, resource exploration, and hazard assessment.