文档介绍:器公争ThestructureoftheearthandPlateTectonics②@@西StructureoftheearthTheEarthisMantlemadeupof3Outercoremainlayers:rust·Thisiswherewelive!TheEarth'(10-70kmthin(-7km)buoyant(lessdensedense(rustcontinentalcrust)mostlyoldyoungYOURPLAN路签Earthismadeof?eHowdoweknowwhatthGeophysicalsurveys:seismic,gravity,icselectrical,geodesyAcquisitionland,air,seaandsatelliteGeologicalsurveys:fieldwork,boreholes,A路签WhatisPlateTectonics?YOURPLAN路签Ifyoulookatamapoftheworld,youmaynoticethatsomeofthecontinentscouldfittogetherlikepiecesofapuzzleYOURPLANPlateTectonicsTheEarth'scrustisdividedinto12majorplateswhicharemovedinvariousdirectionsThisplatemotioncausesthemtocollide,pullapart,orscrapeagainsteachotherEachtypeofinteractioncausesacharacteristicsetofearthstructuresor“tectonic”?·PlatesareExospheremadeofrigidlithosphereUpperManThelithosphereismadeupoftheOuterCorecrustandtheupperInnerCorepartofthemantleYOURPLAN公Whatliesbeneaththetectonicplates?Belowthelithosphere(whichmakesUpperManupthetectonicMantleplates)