Answer:
Continental crust is made of Silicon and aluminium light weight plates as compared to Magnesium and iron in oceanic that are heavy elements.
Explanation:
Oceanic crust is divided into three layers as
1. Semi consolidated sediments
2. Crystalline Basalt
3. Course grained Ultramafic igneous rock
Most of the oceanic floor is dotted by mid oceanic ridges and volcanic vents
