Related Clues:
- Rock on the move
- Volcano's discharge
- Mother rings yearly gathering for the hot part of the crust
- Dangerous outpouring
- Expander of Hawaii
- Novice with Victor in motoring organisation gets hot stuff from Etna
- Vulcanologist's material
- Soap brand that contains pumice
- Underground molten rock
- 1960s lamp type
- Soap containing ground pumice
- Underground lava
- Subterranean molten rock
- Eruption output, perhaps
- Volcano's outpouring