Ocean Floor Lecture - Jack & Katie...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”

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