Which must be true for metamorphism to occur?
Contact metamorphism occurs adjacent to igneous intrusions and results from high temperatures associated with the igneous intrusion. Since only a small area surrounding the intrusion is heated by the magma, metamorphism is restricted to the zone surrounding the intrusion, called a metamorphic or contact aureole.
8.2 List four agents that drive metamorphism. Heat, pressure, directional stress, and fluids which are chemically active.
The most important agents of metamorphism include temperature, pressure, and fluids.
Which is the most important agent of metamorphism?
What are the factors that affect the changes in a rock during metamorphism?
For metamorphism to occur, the parent rock must be in solid form. Metamorphism is the alteration of the structure of a rock by factors like heat and temperature so it must be the material should be in solid form.