Tectonic Mechanisms EarthquakesConvectionTwo-layer Model of Circulation of MantleSingle Layer Model of Mantle ConvectionLava Lamp Model of Mantle ConvectionThree mantle convection models comparedMantle ConvectionPlatesRelationship of crust, lithosphere and asthenosphereWorld Series Earthquake apartment buildingSeattle, WAOrange grove offset, So CalSan Andreas Fault SystemTectonic MechanismsEarthquakesReadingChapter 8: 241-245Chapter 7: 187-196Convection• http://earth.geol.ksu.edu/sgao/g100/plots/0829_12_convection.jpgTwo-layer Model of Circulation of MantleSingle Layer Model of Mantle ConvectionLava Lamp Model of Mantle ConvectionThree mantle convection models compared• Two layer model matches chemical differences in mid-ocean ridge and hotspot basalt• Single layer model matches seismic information about mantle• At present, the ‘lava lamp’ model fits the available dataMantle ConvectionPlatesRelationship of crust, lithosphere and asthenosphere• http://earth.geol.ksu.edu/sgao/g100/plots/0829_12_litho.jpgWorld Series Earthquake apartment buildingSeattle, WA• Feb 28, 2001, Nisqually quake rocked the Central Puget Sound region • 6.2 Richter Magnitude • 6.8 Moment magnitude• Centered 57.5 km south-southwest of Seattle and 52.4 km deephttp://128.205.131.100:591/archives/Seattle.htmlhttp://www.scec.org/earthquakes/Orange grove offset, So CalSan Andreas Fault
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