barrier reef		underwater canyon, Monterey is one of these
continental shelf		Hawaii is an example of this type of island
Pacific		a flat topped seamount
coral reef		made of coral and lymestone and is near water's surface
Atlantis		underwater mountain rising up from the ocean floor
volcanic island		ocean with lots of trenches, submarine canyons, and volcanic islands
midocean ridge		an underwater mountain range
trench		mythical underwater city
shore line		rise built from the sedaments of rivers washing into the ocean
continental margin		off shore this borders a continent and is usually rich in oil and natural gas deposits
submarine canyon		consisting of a continental shelf, slope, and rise
abyssmal planes		a long coral reef that is near and parallel to the shore
seamount		deepest underwater fissures
guyot		underwater planes
continental rise		where a body of water meets the land