Volcano Key Terms

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Across
  1. 2. pea-sized material
  2. 4. a summit depression typically larger than 1 kilometer in diameter, produced by collapse following a massive eruption
  3. 7. walnut-sized material
  4. 10. materials fire fragments
  5. 11. source material for volcanic eruption
  6. 12. the resistance to flow
  7. 13. steep-walled depression at the summit, generally less than 1 kilometer in diameter
  8. 14. lavas occurring along divergent plate boundaries on the ocean floor
  9. 17. triggered by the collapse of volcanic landforms in the ocean
  10. 18. ejected as hot lava
  11. 21. magma rises through the crust
  12. 22. lavas rough, travel short distances
  13. 23. travel along bedding planes
Down
  1. 1. necks resistant vents left standing after erosion has removed the volcanic cone
  2. 3. rich in light silicates
  3. 5. mudflow from interaction with debris and water
  4. 6. cuts across bedding surfaces
  5. 8. eruptions fluid basaltic lava extrudes from crustal fractures called fissures
  6. 9. lava rough, jagged blocky texture
  7. 10. lava resembles a twisted or ropey texture
  8. 12. ash and aviation clouds of volcanic ash damage planes
  9. 15. forcibly injected between strata, can cause strata on top to rise
  10. 16. rich in dark silicates
  11. 19. opening connected to the magma chamber via a pipe
  12. 20. hardened or cooled lava