Across
- 3. The slope between the outer edge of the continental shelf and the deep ocean floor
- 7. The top of a mountain or hill
- 8. Process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge
- 12. A seafloor mountain system formed by plate tectonics
- 13. An elongate depression in the seafloor that is characteristically shallower, shorter, narrower, and topographically gentler than oceanic trenches
- 14. Flat seafloor area at an abyssal depth
- 15. The ocean floor in those parts of the oceans that are more than 2000 m deep
- 17. Low-relief zone of accumulated sediments that lies between the continental slope and the abyssal plain
- 18. A seamount with a flat top
- 19. A small watercraft designed to operate underwater
Down
- 1. A type of excavation or in the ground that is generally deeper than it is wide
- 2. A linear shaped lowland between several highlands or mountain ranges created by the action of a geologic rift
- 4. The outer edge of continental crust abutting oceanic crust under coastal waters
- 5. An opening in the sea floor out of which heated mineral-rich water flows
- 6. The line along which a large body of water meets the land
- 9. A ridge of rock in the sea formed by the growth and deposit of coral
- 10. A submarine mountain
- 11. A steep temperature gradient in a body of water such as a lake, marked by a layer above and below which the water is at different temperatures
- 16. A raised mass of water on the surface of water, especially the sea, which is caused by the wind or by tides making the surface of the water rise and fall