Question: what four characteristics determine the type of metamorphic rock?
Answer: Chemical Composition of the Protolith. The type of rock undergoes metamorphism is a major factor in determing what type of metamorphic rock it becomes. ...  Temperature. ...  Pressure. ...  Fluids. ...  Time. ...  Regional Metamorphism. ...  Contact Metamorphism. ...  Hydrothermal Metamorphism.