Here's how it works:
1. Divergent Plate Boundaries: At mid-ocean ridges, tectonic plates move apart, creating a gap.
2. Magma Rises: Molten rock (magma) from the Earth's mantle rises up to fill this gap.
3. New Seafloor Formation: As the magma cools and solidifies, it forms new oceanic crust, pushing the existing crust further apart.
4. Seafloor Spreading: This process, known as seafloor spreading, creates new seafloor, and is responsible for the continuous growth of the ocean basins.
Examples of Mid-Ocean Ridges:
* Mid-Atlantic Ridge: The most famous example, running down the center of the Atlantic Ocean.
* East Pacific Rise: A major ridge in the Pacific Ocean, responsible for much of the Pacific seafloor's growth.
* Central Indian Ridge: A prominent ridge in the Indian Ocean.
Key Points:
* New seafloor is created at mid-ocean ridges through seafloor spreading.
* This process is driven by tectonic plate movement.
* Mid-ocean ridges are underwater mountain ranges that mark the location of diverging tectonic plates.
* New seafloor creation is a continuous process that contributes to the expansion of the ocean basins.
