identify the mid-ocean ridge and the oceanic …...geosphere starter sheet 1/18/18 or 1/19/18...
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Geosphere Starter Sheet 1/18/18 or 1/19/18
IdentifytheMid-OceanRidgeandtheOceanicTrenchinthispicture.Alsoidentifywhich
directiontheplatesaremoving.
Magma
Mid-OceanRidge
OceanicTrench
Vocabulary!
MantlePlume
Hawaii
Uniquelocationwheremagmarisesthroughthe
crusttocreateislandchains
地幔羽
独特的地方，岩浆通过地壳上升创造出岛屿链
夏威夷
ModernTheory
MantlePlumeswerediscoveredinthe1960s.Thesearehotspots intheMIDDLEofatectonicplatethatcreate
volcanicislands.
1.A“HotSpot”orMantlePlumebubblestothesurfaceofthecrust,
creatinganactivevolcano.
2.Platetectonicsmovethecrustawayfromthemantleplume,making
thevolcanoinactive.
3.Anewvolcanicislandformsoverthemantleplume.
ModernTheory
MantlePlumesshootvolcanicislands throughthecrustastheplatemoves.Theseislandstelluswhichwaytheplateismoving.
Mid-OceanRidge
OceanicTrench
Beta
Omega
Delta
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