Answer
Continental crust is generally older than oceanic crust
Explanation
The average density of the continental crust is lower (2.6 g/cm3) than the oceanic crust(3.0 g/cm3). This allows the continental crust to float on the upper mantle. The rocks in the oceanic crust are younger than those in the continental crust. The continental crust is thicker( 35-70km) than the oceanic crust(5-10 km).
Answer:
Option (D)
Explanation:
The lithosphere refers to the outermost hard layer of the earth that is comprised of rocks that are both granitic and basaltic in composition. It covers the crust and a small portion of the upper mantle. The thickness of the lithosphere does not depend upon the temperature of the interior. The thickness of the continental lithosphere remains somewhat constant but the oceanic lithosphere varies from the mid oceanic ridge where the thickness is minimum and away from the ridge the thickness gradually increases. Temperature has nothing to do with the thickness of lithosphere. The rocks in the lithosphere are hard and tends to break during deformation.
Thus, the correct answer is option (D).
