Lecture One Notes - Plate Tectonics
Lecture One Notes - Plate Tectonics GEOL 306
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This 2 page Class Notes was uploaded by Maddie Evans on Sunday October 4, 2015. The Class Notes belongs to GEOL 306 at University of Oregon taught by Dr. Bindeman in Summer 2015. Since its upload, it has received 45 views. For similar materials see Volcanoes and Earthquakes in Geology at University of Oregon.
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Date Created: 10/04/15
Geology 306 Volcanoes and Earthquakes Week One Lecture Notes General Information gt The Earth is everchanging and is never in a state of sameness gt Some structures like the Grand Canyon and Yellowstone would still be there 200 million years ago as the Earth is nearly 6 billion years old gt The continents are never in xed locations and always moving gt Plates have the potential to collide creating mountains or larger continents as well as split apart and create seas and oceans gt The movement of plates can cause climate changes volcanoes mountains earthquakes extinctions fossil distribution General Information about Plate Tectonics gt The globe is divided up into an in nite number of plates that which the continents and land masses sit upon gt The ocean is getting simultaneously created and consumed by other plates gt Mountain belts are created by continental land masses plates that land masses sit on colliding into each other and pushing matter upwards gt The motion from plates can cause earthquakes and volcanoes Theory of Plate Tectonics gt Earthquakes tend to occur at plate boundaries where plates are shifting and creating tension and friction on one another they can be divergent or transforming gt Volcanoes tend to occur at plate margins where heat is excessively produced gt Plates are always moving hence the almost constant earthquake activity gt The evolution of ora and fauna could be due to the plates moving as they grow but separate from each other causing changes in species that resemble one another at plate boundades Three Theories of Tectonics gt Continental drift hypothesis 19121960 s gt Fixed land masses before 1960 s gt Modern plate tectonics 1960current 1912 Continental Drift Theory gt Matching Continental Plate Boundaries if one was to cut up continents and paste them together as puzzle pieces they would match up almost perfectly aside from slight erosion gt Similarities of oras and faunas animal and plant species are similar at continental boundaries see puzzle analogy above gt Alternative Explanations 0 Ice or wood rafting animalsplants could have been transferred from one land to another by raft 0 Land bridges small portions of land may have been connected to continents and allowing ora and fauna to relocate