Discuss the processes and geological significance of metamorphism, exploring its role in the formation of different rock types and its implications for understanding Earth's dynamic history. (90 words)

Metamorphism involves the transformation of existing rock types into new ones through heat, pressure, or chemically active fluids, often deep within Earth's crust. This process forms metamorphic rocks like marble or slate. It's significant geologically as it recycles minerals and elements within Earth and influences plate tectonics by strengthening rocks. Understanding metamorphism provides insights into Earth's dynamic history, including past environmental conditions and tectonic events.