Metamorphic rock is formed underground through a process that changes a rock's molecular structure due to pressure, heat and chemical reactions. A metamorphic rock forms from a parent rock called a protolith. Depending on conditions, a protolith can transform into any metamorphic rock. Because protoliths are capable of undergoing vast changes, identifying them is sometimes difficult for geologists.
Robin Wright: Net Worth: $65 Million: Date Of Birth: April 8, 1966: Died: December 7, 1955: Place Of Birth: Dallas, Texas, United States: Height: 5 ft 6 in (1.68 m) Profession: Actor, Model, Spokesperson, Businessperson, Singer, Film Producer: Education: William Howard Taft Charter High School, La Jolla High School: Nationality: United States of America: Spouse
How much is John Glenn Worth? John Glenn net worth: John Glenn is an American former aviator, engineer, astronaut, and United States senator who has a net worth of $5 million. John Glenn was born in Cambridge, Ohio in July 1921. Glenn was part of the Mercury seven group of military test pilots who were selected by NASA in 1959 to become America's first astronauts.