Answer:
Iron
Explanation:
The continental crust is less dense than oceanic crust because it contains less amount of iron.
The continental crust is predominantly rich in alumino-silicates.
- Although compared to oceanic crust, the continental crust is thicker.
- The oceanic crust is made up of iron and magnesium rich minerals.
- They are called mafic minerals.
- These minerals are much denser than the alumino-silicates.
