SeafloorFeatures
Seafloor Features
Shoreline –the coast
Continental Margin – includes: Continental shelf,continental slope, continental rise, submarinecanyons, and turbidity curr...
Continental Shelf - Gently sloping part of thecontinent that is underwater. Used by nations as alegal boundary.
Continental Slope - Zone of steeply sloped seafloor leading from the cont. shelf to the oceanbottom.
Continental Rise - A mound of sediments thatseparates the cont. slope from the ocean bottom.
Submarine Canyon - An area on the cont. slopecarved out by turbidity currents.
Underwater landslides or avalanches called turbidity currentscommonly flow down submarine canyons. The debris settles outt...
Abyssal Plain – broad, flat, and deepest part of theocean (2000 – 6000 meters deep).
Continental Shelves, Slopesand Abyssal Plains….
Coral reefs are warm, clear, shallow ocean habitatsthat are rich in life. The reefs massive structure isformed from coral ...
3 types of coral reefs:1. Fringing reefs - are reefs that form along a coastline. They   grow on the continental shelf in ...
2. Barrier Reefs - Barrier reefs grow parallel toshorelines, but farther out, usually separatedfrom the land by a deep lag...
EasternAustralianCurrent
3. Coral Atolls - are rings of coral that grow on top of old,sunken volcanoes in the ocean. They begin as fringe reefssurr...
What are Coral Reefs…
Trench - Narrow channels (deepestplaces on Earth) “pinched” bysubduction.
Rift Valley - Runs along the center of the M.O.R.formed by faulting as magma pushed upward.
Mid-ocean Ridge - Thetopographic expression of sea floorspreading centers and divergentplate boundaries.
Volcano – cone like feature formed from theuprising of molten rock.
Island – a body of land surrounded bywater.  Loihi is a new island forming off the Big Island Of Hawaii about 30 miles Sou...
Mountain Range – a row of connected mountainsformed from lava solidifying from the MOR.
Seamount - Underwater mtn.s, usually volcanic.The biggest mtn. on earth is Mauna Loa (Hawaii)
What are Seamounts…
Guyots - Flat-topped seamounts,formed from being above sea level.
Hydrothermal Vents• Cracks in the ocean floor    through which boiling hot,    chemical-filled water    flows.•   Chimneys...
Under a microscope, a deep-sea worm’s tentacles—used for feeding—look like cooked spaghetti. WHOIscientists found this wor...
Hydrothermal Vents – 5 min
Ocean Floor – the bottom of theocean.
A. Submarine CanyonB. Continental SlopeC. SeamountD. MORE. AtollF. Continental ShelfG. GuyotH. TrenchI. Abyssal PlainJ. Sp...
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
Seafloor Features
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Seafloor Features

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Seafloor Features

  1. 1. SeafloorFeatures
  2. 2. Seafloor Features
  3. 3. Shoreline –the coast
  4. 4. Continental Margin – includes: Continental shelf,continental slope, continental rise, submarinecanyons, and turbidity currents.
  5. 5. Continental Shelf - Gently sloping part of thecontinent that is underwater. Used by nations as alegal boundary.
  6. 6. Continental Slope - Zone of steeply sloped seafloor leading from the cont. shelf to the oceanbottom.
  7. 7. Continental Rise - A mound of sediments thatseparates the cont. slope from the ocean bottom.
  8. 8. Submarine Canyon - An area on the cont. slopecarved out by turbidity currents.
  9. 9. Underwater landslides or avalanches called turbidity currentscommonly flow down submarine canyons. The debris settles outto build up a submarine fan at the base of the canyon.
  10. 10. Abyssal Plain – broad, flat, and deepest part of theocean (2000 – 6000 meters deep).
  11. 11. Continental Shelves, Slopesand Abyssal Plains….
  12. 12. Coral reefs are warm, clear, shallow ocean habitatsthat are rich in life. The reefs massive structure isformed from coral polyps, tiny animals that live incolonies; when coral polyps die, they leave behind ahard, stony, branching structure made of limestone.
  13. 13. 3 types of coral reefs:1. Fringing reefs - are reefs that form along a coastline. They grow on the continental shelf in shallow water. The fringing reef pictured here surrounds much of the Polynesian island of Mooréa.
  14. 14. 2. Barrier Reefs - Barrier reefs grow parallel toshorelines, but farther out, usually separatedfrom the land by a deep lagoon. Great Barrier Island, Australia
  15. 15. EasternAustralianCurrent
  16. 16. 3. Coral Atolls - are rings of coral that grow on top of old,sunken volcanoes in the ocean. They begin as fringe reefssurrounding a volcanic island; then, as the volcano sinks, the reefcontinues to grow, and eventually only the reef remains.
  17. 17. What are Coral Reefs…
  18. 18. Trench - Narrow channels (deepestplaces on Earth) “pinched” bysubduction.
  19. 19. Rift Valley - Runs along the center of the M.O.R.formed by faulting as magma pushed upward.
  20. 20. Mid-ocean Ridge - Thetopographic expression of sea floorspreading centers and divergentplate boundaries.
  21. 21. Volcano – cone like feature formed from theuprising of molten rock.
  22. 22. Island – a body of land surrounded bywater.  Loihi is a new island forming off the Big Island Of Hawaii about 30 miles South west of Kilauea. Its summit is about 1000 meters below the oceans surface.
  23. 23. Mountain Range – a row of connected mountainsformed from lava solidifying from the MOR.
  24. 24. Seamount - Underwater mtn.s, usually volcanic.The biggest mtn. on earth is Mauna Loa (Hawaii)
  25. 25. What are Seamounts…
  26. 26. Guyots - Flat-topped seamounts,formed from being above sea level.
  27. 27. Hydrothermal Vents• Cracks in the ocean floor through which boiling hot, chemical-filled water flows.• Chimneys form around these vents, and organisms surround these vents using chemosynthesis to feed.
  28. 28. Under a microscope, a deep-sea worm’s tentacles—used for feeding—look like cooked spaghetti. WHOIscientists found this worm, called a terebellid, living athydrothermal vents on the Galápagos Rift off Ecuador.
  29. 29. Hydrothermal Vents – 5 min
  30. 30. Ocean Floor – the bottom of theocean.
  31. 31. A. Submarine CanyonB. Continental SlopeC. SeamountD. MORE. AtollF. Continental ShelfG. GuyotH. TrenchI. Abyssal PlainJ. Spreading Center or RiftK. Continental RiseL. Shoreline

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