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04-Ocean Basins.ppt

04-Ocean Basins.ppt - The Ocean Basins How do we know what...

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The Ocean Basins
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How do we know what the ocean basins look like?
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Ocean Basins Mapping
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Ocean Basins Mapping BATHYMETRY • study of ocean floor contours • HMS Challenger 492 bottom soundings • confirmed Matthew Maury’s discovery of the Mid-Atlantic Ridge
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Ocean Basins Mapping • Maury’s 1 st bathymetric map 1855
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Ocean Basins Mapping Puller Sounding Machine • circa 1905
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Ocean Basins Mapping POSIDONIUS (~85 B.C) • first bathymetric studies - Mediterranean • 2 km of rope with stone tied to end
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Ocean Basins Mapping • echo sounding
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Ocean Basins Mapping
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Ocean Basins Mapping
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Ocean Basins Mapping Asdic 144Q Echosounder • circa WWII
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Ocean Basins Mapping
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Ocean Basins Mapping • Mary Tharp - 1959
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Ocean Basins Mapping
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Ocean Basins Mapping • multibeam echosounder • 121 beams
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Ocean Basins Mapping SIDESCAN SONAR
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Ocean Basins Mapping
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Ocean Basins Mapping CONTINENTAL MARGIN
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