How Earth Was Made: Iceland

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Across
  1. 3. When Laki erupted, the rest of the northern hemisphere reported _____ weather
  2. 4. This and heat combine to create magma on a "monumental scale" under Iceland
  3. 5. True or False: Iceland represents normal volcanic activity at the Mid-Atlantic Ridge
  4. 8. Iceland is located on a ___________ boundary
  5. 9. Giant cracks, _____ the valley floor in Thingvillir plan
  6. 10. In 1946, what did the US Navy used to discover a network of underwater mountains separated by a giant tear?
  7. 12. This lies underneath Iceland and is 100 miles wide and 400 miles deep
  8. 14. This is the term for rock piles deposited at the mouth of a glacier
  9. 16. Evidence of volcanic activity at the Mid-Atlantic Ridge is hot volcanic ______ billowing into the ocean
  10. 17. According to Mike Poland, the valley with Thingvillir plan is spreading at the same rate as ________ grow
Down
  1. 1. Hotspots, like the one under Iceland can also be found under Hawaii and __________.
  2. 2. This gas was trapped in the white crystals after an eruption.
  3. 6. These distinctive marks are left on boulder from glacial erosion
  4. 7. What percent of Iceland is covered in ice all year round?
  5. 11. These currents tear open the earth's crust allowing magma to seep up and push continents apart
  6. 13. In 2000, Helkla experienced this type of eruption.
  7. 15. Surtsey built up over a period of 9.5 ________.