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By: Tayloranne Kaufmann Developed in the 1960s. Explains the cause of earthquakes, volcanoes, oceanic trenches, mountain range formation, and many others. Explains the movement of the Earth’s plates. Plate Tectonics means “plate structure”. Alfred Wegener originated the theory of Pangaea. Theory of ‘super continent’ wasn’t originally excepted by scientists. Pangaea= All Earth Happened in the Jurassic Periods. Theory of continental placement being discussed was the Contraction Theory. Alfred Wegener was also a meteorologist. They both study things on Earth. Convergent Boundaries: Plate boundary when two plates move toward each other. Examples of Convergent Boundaries: Earthquakes, volcanoes, mud/landslides, avalanches. Example of Convergent Boundaries and continental plates involved in that boundary: volcanoes- Produces magma chambers above the ocean plate. Divergent Boundaries: Location were plates are moving away from each other. Examples: Earthquakes, volcanoes. Example of Divergent Boundaries and continental plates involved: Volcanoes: Rising current pushes up on the bottom of the lithosphere, lifting it and flowing beneath it. The lateral flow causes the plate material above to be dragged along in the direction of the flow. Transform Boundaries: When two plates slide past one another. Examples: Earthquakes Example of Transform Boundary and the continental plates involved: Earthquakes- shallow because they occur within and between plates not involved in subduction. Volcanic activity not normally present because the typical magma sources of an upwelling convection current or melting subducting plate are not present. We live on the Juan de Fuca Plate. The plates that border or contain us are: Juan de Fuca, Caribbean, and Coco's Plate. We in any danger? Mt.Rainier might erupt. Major slippage along the fault is due (earthquakes). Problems in the distant future: The area west of the San Andreas fault system will move north. Sources: http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Continents .shtml http://www.ucmp.berkeley.edu/geology/techist.html http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tectonics.h tml http://www.dnr.state.oh.us/geosurvey/html/geo_f03/tabid/8307/Default.aspx http://geology.com/plate-tectonics.shtml