Here's why:
* Oceanic Crust: Oceanic crust is thinner than continental crust, typically ranging from 5 to 10 kilometers (3 to 6 miles) in thickness.
* Mid-Ocean Ridges: These underwater mountain ranges are where new oceanic crust is created through volcanic activity. The crust here is the youngest and therefore the thinnest.
* Divergent Plate Boundaries: Mid-ocean ridges mark divergent plate boundaries where tectonic plates move apart. As the plates pull away, magma rises from the mantle to fill the gap, creating new oceanic crust.
So, the thinnest crust on Earth is located at the actively spreading centers of mid-ocean ridges.
