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Bathymetry: Mapping the Sea Floor
Why might mapping be an essential part of ocean exploration? Maps are models – accuracy improving Land based topographic map So how do we map the seafloor? 1
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Topo-maps 2
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Contour map of Monterey “Submerged Valley” 1897
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Geologic Provinces of the Ocean
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Continental Shelf
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Submarine Canyon off Monterrey
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Geologic Provinces of the Ocean
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Shelf Break off New Jersey
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Geologic Provinces of the Ocean
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Continental Slope Oregon Coast (from the west – looking east)
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Geologic Provinces of the Ocean
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Geologic Provinces of the Ocean
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Geologic Provinces of the Ocean
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Abyssal Plain off New Jersey (4000-6000 m)
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SHALLOWER >>>> DEEPER
Color Spectrum ROYGBIV SHALLOWER >>>> DEEPER
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Astoria Canyon off Washington/Oregon
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Flat-topped Bear Seamount
~200 miles from Woods Hole, MA Rises ~2000 m from the ocean floor to a depth of 1100 m 17
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What is this? 18
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Above Sea Level 400’ 300’ 200’ 100’
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Below Sea Level 100’ 200’ 300’ 400’ 500’
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Land or Sea? Land or Sea? 400’ 300’ 200’ 100’ 200’ 300’ 100’ 400’
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Land or Sea? Land or Sea? 400’ 300’ 200’ 100’ 200’ 300’ 100’ 400’ 23
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400’ 300’ 200’ 100’ 100’ 200’ 300’ 400’ 500’
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