Here's a more detailed explanation:
* Divergent Plate Boundaries: When tectonic plates move apart, it's called a divergent plate boundary.
* Magma Upwelling: As the plates separate, magma from the Earth's mantle rises up to fill the gap.
* Faulting and Cracking: The rising magma causes the crust to crack and break, creating a series of faults.
* Valley Formation: Over time, the repeated movement of the plates along these faults causes the land to sink, forming a long, narrow valley known as a rift valley.
Examples of Rift Valleys:
* East African Rift Valley: This is one of the most famous and active rift valleys in the world, stretching over 3,000 kilometers from the Red Sea to Mozambique.
* Mid-Atlantic Ridge: This underwater rift valley is where the North American and Eurasian plates are pulling apart.
Important Note: Rift valleys are not always filled with water, but they can eventually form large lakes or even oceans.
