To get a sample material from the mantle, drilling will be done through the oceanic crust rather than through the continental crust because oceanic crust it? explain why? 1)younger than the continental drift. 2)more dense than continental crust. 3)thinner than the continental crust. 4)softer than continental crust.

Option (3)

Explanation:

The oceanic crust has a thickness of about 7 to 10 km on average, which is much thinner than the continental crust. In order to obtain the rock sample from the mantle, drilling must be done through the rocks of oceanic crust. It is because the depth from the seafloor up to mantle will be much lesser than the depth from the surface of the continental crust to the mantle.

It will require a comparatively lesser amount of money for excavation, in comparison to the drilling done from the continental surface.

Thus, drilling is more favorable to obtain mantle rocks from the oceanic crust.

Hence, the correct answer is option (3).