208_Lect05c_color - Expanding Earth Two Questions 1 Why are...

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Unformatted text preview: Expanding Earth? Two Questions: 1. Why are ridges shallow Mariana Trench 2. Where are oceans deepest and why? 1 Association of Trenches with Benioff Zones and Volcanoes Subduction Zone: Trench, Wadati-Benioff Zone, Volcanic Arc Flux or Hydration melting 2 Plate Tectonic Theory in a nut shell Note: Continents are passive riders (part of Lithosphere) Mechanisms driving plate motions 3 ANIMATION: Rifting and Spreading 4 ANIMATION: Subduction 5 ANIMATION: Transform (Oceanic) 6 ...
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208_Lect05c_color - Expanding Earth Two Questions 1 Why are...

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