Metamorphic rock Metamorphic rock Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure ( or more), causing profound physical or chemical change. The protolith may be a sedimentary, igneous, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by texture and by chemical and mineral assemblage (metamorphic facies). They may be formed simply by being deep beneath
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