1. Plate Movement: Earth's tectonic plates move slowly over time. When two plates pull apart (diverge), it creates a rift.
2. Stretching and Thinning: The diverging plates stretch and thin the lithosphere (Earth's crust and upper mantle).
3. Faulting: As the lithosphere weakens, it fractures and creates faults, which are breaks in the Earth's crust.
4. Downward Movement: The blocks of land between the faults sink down, creating a valley.
5. Volcanism: As the plates pull apart, molten rock (magma) from the Earth's mantle rises to the surface, leading to volcanic activity. This volcanic activity can contribute to the formation and growth of the rift valley.
Example: The East African Rift Valley is a classic example of a rift valley formed through continental rifting. The African Plate is slowly splitting apart, leading to the formation of a series of valleys, volcanoes, and lakes.
