Ocean Floor Lecture Slide 1 “Seeing” the Ocean Floor • Light doesn’t penetrate to the ocean floor so we must use other means to “see” the ocean bottom • Alvin is a manned submarine that can dive up to 4,000m to collect data on rock temp, chemical composition, & geographic features Slide 2 Echo Sounders • Sent out an underwater sound pulse & listened for an echo Slide 3 Satellites • Cannot directly measure ocean depths but can measure variations in elevation of surface water
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OceanFloorLecture
Slide1“Seeing”theOceanFloor
• Lightdoesn’tpenetratetotheoceanfloorsowemustuseothermeansto“see”theoceanbottom
• Alvinisamannedsubmarinethatcandiveupto4,000mtocollectdataonrocktemp,chemicalcomposition,&geographicfeatures
Slide2EchoSounders
• Sentoutanunderwatersoundpulse&listenedforanecho
Slide3Satellites
• Cannotdirectlymeasureoceandepthsbutcanmeasurevariationsinelevationofsurfacewater
Slide4Topography
Studyoftheshapeandfeaturesofthecrust,specifcallyonland.
Slide5Bathymetry
• Thediscoveryandstudyofoceanfloortopography/landfeatures.
• Ancientmethodsusedropeswithstonestiedtotheend.
• Modernmethodsechosounders&satellites
Slide6ContinentalShelf
Slide7ContinentalSlope
Slide8ContinentalRise
Slide9ContinentalMargin
Slide10AbyssalPlain
Slide11AbyssalHills
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