You get the "Freeze" option on lava tiles. The tile is transformed into a [[rock tile]] (even if it was an 'erupted' cliff tile before). Timer: 1 minute 40 seconds.
Cave walls that are under the tile that is erupted will change into lava walls. This includes reinforced cave walls and ore veins. These lava walls can be changed into regular cave walls with the freeze ability.
The resulting lava tile above-ground and lava wall below-ground are separate from each other, and must be frozen separately using two different uses of "Freeze".