Slate Slate Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression. The foliation in slate is called "slaty cleavage". It is caused by strong compression causing fine grained clay flakes to regrow in planes perpendicular to the compression. When expertly "cut" by striking parallel to the foliation, with a specialized tool in the quarry, many slates
Music of Finland such as mentioned above. Suomirock is a word that literally means Finnish rock music. However, its true meaning is a more specific one, meaning rock/pop music with Finnish lyrics. As a genre and a name it really started its life in the 1980s following the punk movement. It means rock/pop music, that is not only imitating international trends or otherwise having international sound and English lyrics, but a form of rock-music, that is recognizably Finnish and have Finnish lyrics. A more and more general and recent term is "suomipop". The boundaries between what is considered "rock" and "pop" have become