What is the thinner layer of the earth's lithosphere that forms surface under the ocean's basins?

The thinner layer of the Earth's lithosphere that forms under the ocean's basins is called the oceanic crust. Typically, it is about 5-10 kilometers thick and primarily composed of basaltic rocks, which are denser than the continental crust. The oceanic crust is formed at mid-ocean ridges through volcanic activity and is continuously being created and destroyed through the processes of plate tectonics.