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
Deed of change of name may be registered in the Central Office of the High Court. Deeds so registered are advertised in the "London Gazette". A deed of name change on behalf of a minor must be approved by the Senior Master on behalf of the Master of the Rolls who will take into account the child's best interests. A deed poll can also be used to change a child's name, as long as everyone with parental responsibility for the child consents to it and the child does not object to it. Registration of deeds is regulated by the "Enrolment of Deeds (Change of Name)