Related Clues:

• Flowing rocks
• Outflow from 48-Across
• Material from a volcano
• Molten volcanic material
• Etna's outflow
• Volcano stuff
• Volcanic outputs
• Flower made of rock?
• Etna's melted rock
• Hot flow
• Volcanic product
• Volcanic flowers?
• Stromboli stuffing?
• Spatter cone's output
• Soap brand with pumice