The representation shows four face of the Earth:

1. End of Permian Period: At the end of the Permian Period, Earth’s continents collided to form one giant landmass called Pangaea.
2. Triassic Period: During the Triassic Period, Pangaea started to break apart and form separate land masses.
3. End of Cretaceous Period: By the end of the Cretaceous Period, the continents as we know them began to drift apart.
4. Present Day: Continents shown are in place, as we know now.