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Unformatted text preview: - Yellowstone is actually a giant volcano.- The Galapagos Islands are owned by Ecuador.- Iceland is directly on top of a mid ocean ridge. 2) Initiation of a Plate Boundary- Divergent boundary initiates where a plate splits: RIFTING- This can occur in the middle of CCTL.- Initiated by: * Hot spots * Upwelling of hot mantle * Excessively large continents * Impacts perhaps?- There are some examples on Earth of all 4 steps: * Unparched continental crust; stretched, possibly some volcanism ~ Colorado Plateau * Rifting continues, faulting thins the crust, basaltic volcanism ~ Rio Grande Rift * First oceanic crust; ocean invades ~ Red Sea * Spreading center well defined, ocean basin widens ~ Atlantic Ocean...
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- Spring '08
- Plate Tectonics, Atlantic Ocean