Ocean Topography. t opo= a place graphy= write. Why do we care?. Curiosity Understanding oceanic life Understanding natural disasters like : tsunami, earthquakes Locating natural resources. Ocean Topography.
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topo= a place graphy= write
That part of the continental landmass that extends from the lowest- low tide line to where it drops steeply to the ocean floor.
It includes the shelf, slope and rise.Continental Margin
The shallow submerged extension of the continent- thick crust made of granite which is less dense than the ocean (basaltic) crust.
They can have hills, depressions, sedimentary rocks, and minerals and oil deposits similar to those on the continent.
Composes 7.4% of the earth’s ocean area.Continental Shelf
Shelves are generally a flat, gentle terrain. This landform is characterized by periods of erosion followed by periods of sedimentation as the sea rises and falls.
It is usually narrow ranging from 6- 60 miles.
W. Florida (Gulf) the slope is almost vertical.
Off of Santiago, Chile- another steep drop.Continental Slope
Deep V- shaped cuts in the continental slope. Found near the mouths of large rivers. Up to 1 mile deep.
These canyons are rugged and twisted.
Monterey Canyon- one of the most spectacular in the
world. 97 K long (60 miles) & reaching
depths of 3,048 m ( 10,000 ft.).