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 Document Verification Service. In Canada a person can informally call themselves whatever they want. In all provinces except Quebec, when someone gets married they can change their last name without legally changing their name by using their Marriage Certificate as verification of the name change. It is almost impossible for married women in Québec to take their husbands' names. Like the United States, the requirements for a formal name change varies from province to province. Except for Ontario, British Columbia and New Brunswick, Canadians must be 18 to change their names and have lived in the province they are changing