Convection current causes the molten rocks to circulate in cyclical manner
Convection current move the inside the mantle towards the upper mantle surface and then horizontally
When the convectional currents meet beneath the crust they sink inward causing the rock above to converge
point move vertically in wards
This causes both horizontal and vertical movement in earth crust
johnmulu answered the question on October 14, 2017 at 08:35
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