Formation of the stratified ocean of the core

A mechanism of formation of the stably stratified layer of light fluid at the core–mantle boundary, which we call the stratified ocean of the core, is proposed. A turbulent diffusion in this stably stratified layer is qualitatively considered. The rate of addition of light fluid component to the layer by barodiffusion and light fluid redistribution inside the layer by turbulent diffusion are evaluated. The relevant parameters of the formation mechanism are estimated.