Ocean Floor Features

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Across
  1. 1. "Fissures"; Spew mineral rich water
  2. 4. Underwater "mountain range"; seafloor spreading
  3. 6. Flat sea-floor; vast
  4. 7. Transition to the deep ocean floor; gentle slope
  5. 8. Flat-topped underwater mountains; have "tablemounts"
  6. 9. Underwater mountains formed by volcanoes
  7. 10. Seaward incline; steep
Down
  1. 2. Steep narrow depressions; "Mariana"
  2. 3. Formed by tectonic activities; steep walls
  3. 5. Shallow "shelves" at the edges of continents