Ocean Geology

1. ring-shaped coral reef surrounding a central lagoon
4. ooze composed primarily of the calcium carbonate coverings of marine organisms
7. underwater mountain or volcano
11. derived from land
13. flat-topped, submerged mountain
14. derived from extraterrestrial sources
16. tectonic plates that move away from each other
17. underwater mountain range formed by divergent tectonic boundaries

1. flat, sediment-covered plain on ocean floor
2. shallow, submerged extension of a continent
3. part of continental margin created by fallen sand and rock
5. tectonic plates that move toward each other
6. ooze composed primarily of the silica coverings of microscopic marine organisms
8. deep oceanic depressions associated with subduction zones
9. chasm formed where new ocean floor is being created
10. derived from the remains of marine organisms
12. steeply sloping part of continental margin
15. derived from ionic crystal-creating chemical reactions in water