* Seafloor Spreading: The Mid-Atlantic Ridge is a divergent plate boundary where new oceanic crust is constantly being formed. Magma rises from the Earth's mantle and cools to form new rock, pushing the older rock away from the ridge in opposite directions.
* Age Progression: This process creates a pattern where the rocks closest to the ridge are the youngest, and the rocks farther away from the ridge are progressively older. This is why the rock at the ridge is younger than the rock on the edge continents.
* Continental Crust: The continents are made up of older, thicker continental crust that was formed much earlier in Earth's history. This crust is not created at spreading centers like the Mid-Atlantic Ridge.
In essence, the Mid-Atlantic Ridge is a "conveyor belt" for new ocean floor, while the continental crust is much older and has not been actively created for a very long time.
