Related Clues:

• Mount St. Helens output
• Substance on some mountains or in some lamps
• Pinatubo pouring
• Magma on the move
• Mauna Loa output
• Soft rock
• Mount St. Helens spew
• Igneous rock, once
• Rolling rock?
• Volcano flower
• Soft rock?
• Volcanic outflow
• Hand soap brand
• Mantle piece?
• Volcano outflow