Coastal and Oceanic Landform ( 36. Oceanic Plateau)

                                                                                                                                         Back to Coastal and Oceanic Landform

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

• 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

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

the red patch below the plateau is the continent of Antarctica