Fire Mountains: Volcanoes

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Across
  1. 1. any currently or recently erupted volcano
  2. 3. a volcano with evidence of a past eruption but no human documentation
  3. 5. the scale that measures the intensity of a volcanic eruption
  4. 12. describes volcanism that occurs above the ground
  5. 14. a rise in temperature as one goes deeper into the earth's interior
  6. 15. large chambers of cooled and hardened magma
  7. 16. the opening at the summit of a volcano
  8. 17. the passage that brings magma to the surface of the earth
  9. 19. materials like ash, cinders, bombs, and other solid materials emitted from the volcano
  10. 20. thick layers of volcanic rock that cover the earth's surface
Down
  1. 2. the formation of volcanic features underground
  2. 4. volcano type made from the accumulation of solid debris
  3. 6. a hot spring whose waters are forcibly ejected into the air
  4. 7. volcano type made primarily from the repeated flow of lava
  5. 8. highly eroded volcanoes with no measurable seismic activity
  6. 9. the layer of loose pyroclastic materials that covers the ground surrounding an active volcano
  7. 10. the type of energy associated with magma intrusions within the earth
  8. 11. a composite type of volcano made from the accumulation of both lava and solid debris
  9. 13. in geology, anything to do with molten rock materials
  10. 18. any extrusive igneous depositional mountain
  11. 21. molten rock that has reached the earth's surface and has mixed with atmospheric gases