Coastal and Oceanic Landform ( 36. Oceanic Plateau)


                                                                                                                                         Back to Coastal and Oceanic Landform
Mascarene Plateau
Mascarene Plateau

  • An oceanic plateau/submarine plateau is a large.
  • Relatively flat.
  • Rises well above the ambient seabed.
  • Oceanic plateaus are composed;

                                 -continental crust.
                                - step interrupting the continental slope


  • Some plateaus are under sea remnants of large igneous provinces.
  • These were formed by continental flood basalts.

                         -Deccan Traps in India
                        - Snake River Plain in the Pacific Northwes

Ontong Java Plateau,Pacific Ocean
Ontong Java Plateau,Pacific Ocean

  • Continental crust has the highest amount of silicon.
  • Oceanic crust has a smaller amount of silicon.
  •  Igneous oceanic plateaus have a ratio intermediate between continental and oceanic crust.

  • Igneous oceanic plateau is subducted underneath another one.

Naturaliste Plateau
Naturaliste Plateau

examples
  • Campbell Plateau (South Pacific)
  • Challenger Plateau 
  • Agulhas Plateau (Southwest Indian)
  • Broken Ridge Plateau (Indian)
  • Caribbean-Colombian Plateau (Caribbean)
  • Exmouth Plateau (Indian)
  • Hikurangi Plateau (Southwest Pacific)
  • Kerguelen Plateau (Indian)
  • Manihiki Plateau (Southwest Pacific)
  • Mascarene Plateau (Indian)
  • Naturaliste Plateau (Indian)
  • Ontong Java Plateau (Southwest Pacific)
  • Shatsky Rise (NorthPacific)
Zealandia Hikurangi Plateau
Zealandia Hikurangi Plateau


the red patch below the plateau is the continent of Antarctica
the red patch below the plateau is the continent of Antarctica


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