Plate Boundaries Earthquake LocationsTectonic Plate MapPlate MapThree types of plate boundariesDiverving plate summaryDiverging PlatesIcelandic RiftThree types of convergent marginsPeru-Chile TrenchOcean-Continent ConvergenceOcean-Ocean ConvergenceJapan TrenchLocation of Pacific TrenchesIndia-Asia before collisionHimalayas as a result of collisionContinent-Continent ConvergenceIndian Plate MovementHimalayan SutureSummary of convergent platesTransform BoundaryTransform Faults Transform Fault BoundarySan Andreas Transform FaultJuan de Fuca PlateSea-Floor Spreading and Plate Boundaries Dynamo that creates magnetic fieldMovement of Magnetic NorthMovement of Magnetic pole since 1600sApparent Polar wandering for North America and EurasiaPole location with moving continentsMagnetic Reversals in volcanic stratigraphyMagnetic Reversal Age ScaleLava Magnetized in Normal FieldLava Magnetized in reversed fieldLater Lava Magnetized in Normal FieldSea floor spreading documented by magnetic reversalsMagne-tometer SurveyMagnetic AnomaliesAge of Sea FloorEarthquake LocationsJapan Trench earthquakesJOIDES ResolutionAge of Emperor Seamount ChainVelocities of PlatesRadio TelescopeWegener’s Pangaea200 mya (early Jurassic)150 mya (late Jurassic)100 million years ago90 mya (Cretaceous)50 mya (early Cenozoic)20 mya (late Cenozoic)Present DayIn 50 million years?In 250 million years??Plate movement over 200 my1Plate BoundariesChapter 8Pages 228-245Earthquake Locations• http://earth.geol.ksu.edu/sgao/g100/plots/0916_global_seismicity.jpgTectonic Plate Map• http://earth.geol.ksu.edu/sgao/g100/plots/0829_08_plates.jpgPlate MapAnimation link• http://www-personal.umich.edu/~vdpluijm/plates.gifhttp://www.ucmp.berkeley.edu/geology/tectonics.htmlThree types of plate boundaries• http://earth.geol.ksu.edu/sgao/g100/plots/0829_3boundaries.jpgDiverving plate summary2Diverging PlatesIcelandic Rifthttp://earth.geol.ksu.edu/sgao/g100/plots/0829_09_iceland.jpgThree types of convergent margins• http://earth.geol.ksu.edu/sgao/g100/plots/0829_10_convergent.jpghttp://vulcan.wr.usgs.gov/Glossary/PlateTectonics/Maps/map_plate_tectonics_cascades.htmlPeru-Chile Trench• http://earth.geol.ksu.edu/sgao/g100/plots/0829_10_convergent.jpgOcean-Continent Convergence3Ocean-Ocean Convergence Japan Trench• http://earth.geol.ksu.edu/sgao/g100/plots/0829_10_convergent.jpgLocation of Pacific Trenches India-Asia before collisionHimalayas as a result of collisionContinent-Continent Convergence4Indian Plate MovementHimalayan Suture• http://earth.geol.ksu.edu/sgao/g100/plots/0829_10_convergent.jpgSummary of convergent platesTransform BoundaryTransform Faults Transform Fault Boundary5San Andreas Transform Fault• http://earth.geol.ksu.edu/sgao/g100/plots/0829_11_saf_photo.jpgJuan de Fuca PlateSea-Floor Spreading and Plate Boundaries Dynamo that creates magnetic field• http://www.nasa.gov/vision/earth/lookingatearth/29dec_magneticfield.htmlMovement of Magnetic North• http://www.nasa.gov/vision/earth/lookingatearth/29dec_magneticfield.html6Movement of Magnetic pole since 1600s• http://www.geolab.nrcan.gc.ca/geomag/long_mvt_nmp2_e.shtmlApparent Polar wandering for North America and EurasiaPole location with moving continentsMagnetic Reversals in volcanic stratigraphyMagnetic Reversal Age ScaleLava Magnetized in Normal Field7Lava Magnetized in reversed fieldLater Lava Magnetized in Normal FieldSea floor spreading documented by magnetic reversalsMagne-tometerSurveyMagnetic AnomaliesAge of Sea Floor• http://earth.geol.ksu.edu/sgao/g100/plots/0829_04_age_of_ocean_floor.jpg8Earthquake Locations Japan Trench earthquakesJOIDES ResolutionAge of Emperor Seamount ChainVelocities of Plates Radio Telescope9Wegener’s Pangaea 200 mya (early Jurassic)150 mya (late Jurassic) 100 million years ago90 mya (Cretaceous) 50 mya (early Cenozoic)1020 mya (late Cenozoic) Present DayIn 50 million years?In 250 million years??Plate movement over 200
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