1. Magmatism: This involves the formation, movement, and solidification of magma (molten rock) within the Earth's crust and upper mantle. Magma can melt existing rocks, transforming them into new igneous rocks.
2. Metamorphism: This process changes existing rocks (igneous, sedimentary, or even other metamorphic rocks) through intense heat and pressure deep within the Earth's crust. This alters the rock's mineral composition, texture, and sometimes even its chemical makeup.
3. Recrystallization: This process involves the rearrangement of atoms within existing minerals to form new, more stable minerals under the extreme conditions found deep within the Earth. It is a key part of both metamorphism and magmatism.
4. Deformation: This refers to the bending, folding, and fracturing of rocks under immense pressure within the Earth. It is a significant force in mountain building and can alter the structure and appearance of rocks.
These processes are all interconnected and contribute to the constant cycle of rock transformation that occurs within our planet.
