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Alfred Wegener (1880-1930)
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Mid Atlantic Ridge
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Mid Ocean Ridge System
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Sea Floor “Stripes” http://atlas.geo.cornell.edu/education/instructor/tectonics/polarity.html
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Convergent Margin
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Major Lithospheric Plates Source: NASA
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Plate Configuration of PNW
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Plate Margins Divergent margins: spreading centers where new lithosphere (sea floor) is created Convergent margins: plates are moving toward each other Transform margins: plates move past one another without creating or destroying lithosphere
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Mantle Convection Source: University Montpellier
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Geothermal Gradient
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Rate of Plate Movement
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Plate Margins Source: USGS
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Juan de Fuca Ridge Source: GSC
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Plate Margins Source: USGS
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East African Rift
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Plate Margins Source: USGS
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Juan de Fuca Ridge Source: GSC
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Continental-Continental Convergence Source: USGS
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Himalayas Source: USGS
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Transform Margin
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Transform Faults Left-LateralRight-Lateral
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Alpine Fault, New Zealand
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Volcanism and Plate Margins Source: Smithsonian
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Earthquakes and Plate Margins
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Igneous rock types (type and location of volcanism) Seismic activity (type and location of earthquakes) Location of sedimentary basins Location of uplifts or mountain ranges Location of ocean basins Plate Tectonics Control
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Hawaii-Emperor seamount chain
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Table 10.818022.50 2 1.3 31.8 4 2.6 5 3.7 7 10.3 8 12 918.9 10 20.6 11 27.2 1242.4 IntervalAge (my)Distance (kms)Rate (cm/yr) 65.1
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Chart
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