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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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 been found on the ocean floor?flat, gentle terrain. This landform is characterized by periods of erosion followed by periods of sedimentation as the sea rises and falls.
greatest- Antarctica (350m)
widest- Arctic ocean (Siberia) East coast of N. A.
narrowest- W. coast of North and
The part of the activity”.margin where the terrain takes a more rapid descent.
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.
East coast mouths of large rivers. Up to
– Hudson Canyon – 161 km (100 mi,) & approx. 3,658 m
(12,000 ft.) deep.Submarine Canyons
West coast mouths of large rivers. Up to
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.).