Related Clues:

• Go slow, in a way
• Mount Pelee outflow
• Pumice, in fluid form
• Seep through the cracks
• Expelled molten rock
• Output of some natural explosions
• Hot spew
• Volcanic flower
• Volcano's ejection
• Red-hot outflow
• Molten outpouring
• Molten tar, e.g
• A series of drops
• Eruption stream
• Stuff from a volcano