In our last monograph "A new paradigm of formation of accumulative relief in shallow areas of oceans and seas" (Ukrainian), an endogenous theory of formation of underwater and above-water accumulative forms of bottom relief is proposed. The thesis that hydrodynamic barriers constantly exist in water over active tectonic faults is substantiated. The tectonic map of the Black and Azov Seas shows that all the accumulative forms of the bottom topography are formed over tectonic faults (map a). Look at the photo (on the map a large arrow) of the surface sandy accumulative form of the Black Sea (photo b). The structure has been eroded, and the hydrodynamic barrier over the tectonic fault continues to restore the sandy accumulative form. We confirmed this possibility by modeling (scheme c). Please comment and ask questions.