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 that they are not seeking a change of name for any unlawful purpose such as the avoidance of debt or evasion of law enforcement. Such a name change would become final if within their jurisdiction, once a federal court naturalizes an applicant. To maintain a person's identity, it is desirable to obtain a formal order so there is continuity of personal records. The "open and notorious" use of a name is often sufficient to allow one to use an assumed name. In some jurisdictions, a trade name distinct from one's legal name can be registered with a county clerk, secretary