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Plate Tectonics ! Vertical Scale Kelly Alfred Wegener was a German geologist but he also worked with meteorology and climatology This related to his discoveries because weather impacted geology by weathering down land forms and the weather temperature, like the sun and snow. He also originated the theory of Pangaea Pangaea happened during carboniferous period which was 300,000,000 years ago Alfred Wegener Pangaea means ‘all lands’ , was the supercontinent that existed 300 million years ago. Arthur Holmes elaborated on the idea that the mantel undergoes thermal convection. His ideas later assisted in the recognition of Wegener’s theory. Then theory of continental drift & ‘super continent’ occurred. However the theory of a ‘super continent’ originally was not accepted by scientists. Continental drift was being discussed during the time Wegener introduced his Pangaea theory. Arthur Holmes There are 3 primary types of Tectonic Plate boundaries. A plate is two sub-layers of the earth's crust (lithosphere) that move, float, and sometimes fracture. The different types of Tectonic Plate Boundaries are the Divergent, Convergent, and Transform boundary. The idea of boundaries. A divergent boundaries are basically when plates move away from each other forming oceanic valleys or ridges Divergent boundaries can cause earthquakes, volcanoes and trenches. An example of a divergent boundary is the East Africa Rift Valley. Divergent Boundary -> Boundaries - Divergent Volcano- landform where molten rock the surface of the planet. Trench- a long steep-sided depression in the ocean floor Volcano^ Trench^ Earthquake^ Plates that are moving in opposite directions meet and one is dragged down under the other. Plates moving in opposite directions meet and one is dragged down. Hazards caused by Convergent boundaries are Earthquakes & Volcanoes. Convergent Boundary A transform boundary is when one plate moves horizontally past another plate. example is the earthquake-prone San Andreas fault zone of California, which marks the boundary between the Pacific and North American Plates Transform Boundary Mountain - a section of land that is well above its surrounding grounds. Landslides – The downward sliding of a relatively dry mass of earth and rock. Mudslides - a landslide that consists of mud. Mountains, landslides, and mudslides! Pictures from: Google Images. Websites I used: o o o o o http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Co ntinents.shtml http://www.ucmp.berkeley.edu/geology/techist.html http://www.ucmp.berkeley.edu/history/wegener.html http://scign.jpl.nasa.gov/learn/plate2.htm http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tecto nics.html Work Cited