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Alfred Wegener (1880-1930). Mid Atlantic Ridge Mid Ocean Ridge System.

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Presentation on theme: "Alfred Wegener (1880-1930). Mid Atlantic Ridge Mid Ocean Ridge System."— Presentation transcript:

1 Alfred Wegener (1880-1930)

2 Mid Atlantic Ridge

3 Mid Ocean Ridge System

4 Sea Floor “Stripes” http://atlas.geo.cornell.edu/education/instructor/tectonics/polarity.html

5 Convergent Margin

6 Major Lithospheric Plates Source: NASA

7 Plate Configuration of PNW

8 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

9 Mantle Convection Source: University Montpellier

10 Geothermal Gradient

11 Rate of Plate Movement

12 Plate Margins Source: USGS

13 Juan de Fuca Ridge Source: GSC

14 Plate Margins Source: USGS

15 East African Rift

16 Plate Margins Source: USGS

17 Juan de Fuca Ridge Source: GSC

18 Continental-Continental Convergence Source: USGS

19 Himalayas Source: USGS

20 Transform Margin

21 Transform Faults Left-LateralRight-Lateral

22 Alpine Fault, New Zealand

23 Volcanism and Plate Margins Source: Smithsonian

24 Earthquakes and Plate Margins

25 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

26 Hawaii-Emperor seamount chain

27 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

28 Chart


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