Agents of Metamorphism

  1. Heat
    1. Nearby Magma
    2. Radioactive Decay
    3. Normal Geothermal Gradient
    4. Frictional Heat During Diastrophism
  2. Pressure
    1. Overburden pressure
    2. Tectonic Pressure
    3. Hydraulic Pressure
  3. Chemically Active Fluids
    1. Juvenile Water
    2. Meteoric Water
    3. Connate Water
    4. Water of Formation