Fig. 4: Schematic interior structure of an icy moon and the various geological processes involving the eutectic and cenotectic.
From: On the equilibrium limit of liquid stability in pressurized aqueous systems

These processes include but are not limited to brine pocket migrations, percolation, possible eruptions (eutectic), and freezing of the hydrosphere from above (ice Ih) and below (high-pressure ices) that results in the cenotectic ocean. Ice Ih layer relative thickness is exaggerated for clarity.