Isostatic Adjustment is vital aspect under isostasy. It is the applied part of the theory of Isostasy. How the highest part like Himalayas, Andes, Rocky etc adjust with the deepest Ocean basins, Plateaus and Plain simultaneously on the surface of the earth. The present video explains the mechanism of their simultaneous adjustment on the surface of the earth. This is the 3rd video on isostasy. Videos regarding Pratt's and Airy's concept have already been unloaded.