* Seafloor rocks are constantly renewed: The process of seafloor spreading means that new oceanic crust is constantly being created at mid-ocean ridges. This new crust pushes older crust away from the ridge, eventually subducting (sinking) back into the Earth's mantle. This means that the oldest seafloor rocks are still relatively young compared to continental rocks.
* Continental rocks are much more stable: Continents are made up of thicker, less dense crust that is less likely to be subducted. This means that some continental rocks can be extremely old, with some dating back billions of years.
In summary:
* The oldest seafloor rocks are younger than the oldest continental rocks.
* You can find both very old and very young rocks on both continents and the seafloor.
Therefore, it's not a straightforward comparison. It depends on the specific location and the rock formation you're looking at.
