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convergent boundaries - Coggle Diagram
convergent boundaries
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Why does magma form?
At subduction zones, the descending oceanic plate releases water
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Example
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Creates earthquakes, volcanoes and deep ocean trenches
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Ocean Trenches
Deep, narrow depressions in the ocean floor
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Plate movement â collision â subduction / compression â earthquakes + volcanism + mountain building
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Oceanic plate â â âđ _____________ââ Subducting oceanic plateâđ Mantleâ magmaâđ Volcanoes
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đď¸đď¸đď¸âŹď¸ compressed + folded crust âŹď¸ââââââââââââââContinental crust
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Subduction â water released â melting point decreases â partial melting â magma rises â viscous magma + trapped gases â explosive eruption
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Plate movement â friction/plates lock â stress builds â sudden movement â seismic energy released â earthquake
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Subduction â earthquake â seabed displacement â water displaced â tsunami â coastal flooding
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Two plates convergeâDenser oceanic plate subductsâFriction + pressure cause earthquakesâWater released from subducting slabâMantle partially meltsâMagma risesâVolcanoes formâExplosive eruptions can occur
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Two continental plates collideâCompressionâRock layers foldâCrust thickensâUpliftâFold mountains form
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Convergent = plates move towards each otherSubduction = one plate sinks beneath anotherTrench = deep depression formed at a subduction zoneCollision = continental plates push togetherCompression = squeezing forcePartial melting = only part of the mantle meltsVolcanic arc = chain of volcanoes above a subduction zoneWadatiâBenioff zone = zone of earthquakes along a subducting plateComposite volcano = steep-sided volcano associated with explosive eruptionsFold mountains = mountains formed by compression and folding