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Plate bondaries - Coggle Diagram
Plate bondaries
Convergent
C - C convergent
Denser oceanic plate subducts beneath continental plate, forming oceanic trench in subduction zone
Subducting plate sinks into mantle, high pressure forces water out of oceanic crust
Water lowers the melting point of underlying mantle , causing melting and creating magma
magma rise though weak areas, forming volcanoes on continental plate
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O - C convergent
2 low-density continental collide, subduction does not take place
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O - O convergent
One oceanic plate sinks below one another, resulting in subduction
Subducting plate sinks into mantle, high pressure force water out if its oceanic crust
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Transform
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2 plates slide horizontally alongside each other, no crust created or destroyed
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San Andreas Fault @ California, USA
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Divergent
O - O divergent
When 2 oceanic plates moves apart, decrease in overlying pressure, causing parts of underlying pressure to melt
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Eg, Iceland was made by the Mid Atlantic RIdge, and not part of the original Pangea supercontinent
Extensive underwater mountain chain, "mid oceanic ridge"
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C - C divergent
2 continental plates move apart, rock fractures move apart, creating parallel faults, to form rift valleys
Eg, The Great Rift Valley formed near Africa where the Nubian Plate pulls apart from the Somalian Plate
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