Earth Movement Due to the Convectional Currents in the Mantle

- Convectional currents causes the molten rocks to circulate in cyclical manner.
- Convectional currents move from inside the mantle towards the upper mantle's surface and then horizontally and finally vertically.
- As they move horizontally, beneath the SIMA they exert a frictional drag/pull on the crustal rocks causing them to move horizontally.
- When the convectional currents meet beneath the crust, they sink inwards causing the rocks above to convergence point move vertically inwards.
- This causes both horizontal and vertical movements in the earth's crust.