* Seafloor Spreading: The ocean floor is constantly being created at mid-ocean ridges where magma rises from the Earth's mantle and cools. This process pushes older ocean floor away from the ridge, creating a conveyor belt of sorts.
* Subduction: As the older ocean floor moves away from the ridge, it eventually reaches a subduction zone where it dives back down into the mantle. This means the oldest ocean floor is constantly being recycled.
* Continental Stability: Continents are much older and more stable. While they are also constantly being reshaped by plate tectonics, their rocks are not recycled at the same rate as the ocean floor.
In summary: The ocean floor is continuously renewed, resulting in younger rocks. Continents, on the other hand, are much older and have accumulated a history of rock formations over billions of years.
