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
Japanese name name (such as the name of a province, a river, or a sea), the name of a weapon, an item identified with Japanese tradition (like a koto or nishiki), or a term indicating superiority. Often, "waka" indicates a wrestler whose father was also in sumo; in this case, the meaning is "junior". Wrestlers can change their shikona, as Takahanada did when he became Takanohana () and then Takanohana (). Another notable example is the wrestler Sentoryu, which means "fighting war dragon" but is also homophonous with St. Louis, his city of origin. Geisha and practitioners of traditional crafts and arts