Ocean Topography
Continental Shelf- A continental shelf is the edge of a continent that lies under the ocean. Continents are the seven main divisions of land on Earth. education.nationalgeographic.com Encyclopedic entry. A continental shelf is the edge of a continent that lies under the ocean. Continents are the seven main divisions of land on Earth.
Continental Slope-the sometimes-steep descent of a continental shelf to the ocean floor.
Submarine Canyon- is a steep-sided valley cut into the sea floor of the continental slope, sometimes extending well onto the continental shelf.
Guyot-also known as a tablemount, is an isolated underwater volcanic mountain (seamount), with a flat top.
Rift Valley-A rift valley is a linear-shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault.
Seamount-is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level), and thus is not an island.
trench-a long narrow steep-sided depression in the earth's oceanic crust, usually lying above a subduction zone
Abyssal Plain- is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface.
Mid ocean ridge-is an underwater mountain range, formed by plate tectonics.
video.nationalgeographic.com April 21, 2011—Scientists use cameras and sonar near the U.S. Virgin Islands to 'see' the sea floor and find out how fish and other sea life use the underwater habitats, which include coral reefs and sea grasses.
science.kqed.org Using sound and laser technology, researchers have begun to reveal the secrets of the ocean floor from the Sonoma Coast to Monterey Bay. By creating complex 3-D maps, they're hoping to learn more about waves and achieve ambitious conservation goals.

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