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Lecture 14

Lecture 14 - Plate Tectonics

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Earth Sciences
Earth Sciences 1083F/G
Cameron Tsujita

Lecture 14Plate Tectonics y How can the rock cycle be explained o There was no unified explanation to explain how each rock class could be transformed into another o The theory of plate tectonics provided a framework to explain the dynamics of the rock cycle and several other processes y What is Plate Tectonics o Plate A rigid slab that together with other such slabs comprise Earths outer rocky shello Tectonics A terms from Greek tekton meaning builder o A theory that explains the global distribution of geological phenomena in terms of the formation destruction movement and interaction of the earths lithospheric plates o Developed by Alfred Wegener y Continental Drift explained by o Fossil distribution o Jigsaw puzzle fit of continents o Fossil evidence o Evidence from inferred ice flow directions glaciers cannot flow over water for any great distance o Mountain chains eg Appalachian and Caledonian Mountains line up perfectly o Seafloor topography midocean ridges in middle of oceans trenches along margins of large landmassesD
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