Plot showing the time delay, in Myr, between the ice table retreat with water ice alone vs. water ice table with salts of varying weight fraction as part of the overlying regolith at a temperature of ∼152.7 K, the annual average surface temperature at Ceres’ Occator crater from the model of M. E. Landis et al. (2017). We assume the annual average temperature is representative of the temperature at depth due to Ceres’ small diurnal and annual average temperature skin depths.