Face-touching water can be converted to pumice instead of the
flowing lava (e.g. lava intrudes into that space and quenches
instead) creating even more of a mess.
- Flowing lava quenches to pumice
- Pumice can spontaneously melt back to flowing
lava, when touching lava, and sometimes even
when still quenched.
- Pumice cannot be harvested or moved, it's
utterly destroyed by digging.
