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