Plates & Marine Geology

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Across
  1. 4. Study of the changes in Earth's magnetic field over time.
  2. 7. Area where 1 plate slides under another.
  3. 10. Circular reefs around a lagoon with no land in it.
  4. 11. Underwater volcanoes
  5. 12. Boundaries where plates move towards each other
  6. 13. Seamounts that form away from plate boundaries over a mantle plume.
  7. 15. Tall hydrothermal vents with black "smoke".
  8. 16. Areas where Earth's tectonic plates move apart.
Down
  1. 1. Volcanic rock with high amounts of magnetite.
  2. 2. Oxidizing hydrogen sulfide to make carbohydrates.
  3. 3. Supercontinent proposed by Wegener.
  4. 5. Boundaries where one plate slides past another
  5. 6. Spreading boundaries
  6. 8. Forms a convection cell
  7. 9. Earth's magnetic field angle changes by latitude.
  8. 14. Made of calcium carbonate skeletons of coral.