Trends of 'incipit'. Used Rarely. incipit is in the lower 50% of commonly used words in the Collins dictionary.
At the MOR, molten rock is carried upward towards the surface via convection, where new oceanic lithosphere is generated (usually as an fine-grained igneous rock known as basalt) and the plates are further pushed away from the spreading center.
Lithospheric plates move via the creation of new oceanic crust and the destruction of old oceanic crust at mid-ocean ridges and trenches respectively. The lithosphere is constructed of solid crustal rock and the solid upper mantle which floats on top of the plastic, semi-molten asthenosphere.