Oceanic crust generally does not last longer than 200 million years.

At ridges in the middle of oceans, new oceanic crust is created.

So they had never been able to confirm their theories of how oceanic crust is formed.

The analysis also led the scientists to conclude that the impact occurred in the oceanic crust.

It is an essential part of the oceanic crust.

Upper mantle and oceanic crust are exposed along this bank.

Geologically, an ocean is an area of oceanic crust covered by water.

Both the continental and oceanic crust "float" on the mantle.

Sumbawa island is flanked to both the north and south by the oceanic crust.

Hence most oceanic crust is the same thickness (7 1 km).