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
Name change Act, the name registered after birth is definitive and immutable. However, there are some circumstances under which a name change is allowed: In India, the person concerned submits a name change request to an appropriate authority, with supporting documents. Subsequently, an application must be made to the Government Printing Press, which issues an Official Gazette Notification certifying the change of name. Although it has always been relatively easy to change one's legal names in Norway, it used to require some kind of government approval. As late as 1830, local vicars were instructed to write both given (Christian) names, as well