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
Stage name more ethnic identity, when that gave them an advantage in playing "ethnic" roles. An example of this type of name change was Freddie Mercury of the British rock band Queen, who was born Farrokh Bulsara to Parsi parents; his name change was partly intended to conceal his heritage. Italian-American actress Bernadette Peters, who was born Bernadette Lazzara, changed her last name to avoid being typecast as women who were Italian or of Italian heritage. Likewise, heavy metalist Ronnie James Dio, also of Italian descent, changed his name from Ronald James Padavona, after the mobster, Johnny Dio (whose name was also