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The Seafloor PowerPoint PPT Presentation


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The Seafloor. Continental margin: Shelf, slope, rise. Submarine canyons, turbidity currents. Relationships between : shelf, slope, canyons, fans, rise. Abyssal plain. Vast and flat Interrupted by Seamounts (volcanic in origin) Guyots or tablemounts (eroded islands).

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The Seafloor

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The Seafloor


Continental margin:Shelf, slope, rise


Submarine canyons, turbidity currents

Relationships between :

shelf,

slope, canyons,

fans,

rise


Abyssal plain

  • Vast and flat

  • Interrupted by

    • Seamounts (volcanic in origin)

    • Guyots or tablemounts (eroded islands)


Formation of guyots

Found on

abyssal plains


Location of mid-ocean ridges


Mid-ocean ridges, transform faults, fracture zones


Formation of hydrothermal vents


Black smoker


ALVIN


Tube worms

at smoker


Black lines = center of ridges

Offsets = transform faults

Long red lines = fracture zones


Location of trenches


Trenches


A review


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