Continental drift

Continental Drift         Continental drift is the surmisal that the positions of the earths continents arrive at changed a lot through geological time. The German meteorologist Alfred Wegener proposed the send-off all-inclusive system of Continental drift in 1912, on the rear end of the way the continents fit to masterher on the contend Atlantic coasts and paleontology correlation on both sides of the Atlantic. He proposed the possibility that about 200 million years agone in that respect was one great big continent, or supercontinent, called Pangaea. Pangaea split into deuce big landmasses, Laurasia and Gondwanaland. The present continents separated in the next geologic era, the Mesozoic. In this process, the Earths rotation caused horizontal alterations in the granite continents floating on the sea of the basaltic ocean floors. The frictional drag along the leading edges of the drifting continents created mountains. Wegeners system met argument un til 1954, when British geophysicists quest to explain the phenomenon of polar wandering bring around it. Since then, the modern theory of photographic plateful Tectonics has evolved from and replaced Wegeners original thesis. Plate Tectonics is the theory that deals with the structure, history, and dynamics of the earths crust. The earths crust is formed of 13 Continental plates. The boundaries of the zones are where tectonic activities occur, and where earthquakes and volcanic eruptions tend to happen. The plate tectonics theory was thought up in the mid-sixties and 1970s, with ideas taken from Wegeners earlier thoughts. Earlier, Wegener and other scientists had noted that continental crust grows by additions and that a ridge in the inwardness of the ocean runs almost all the way around the world. It was likewise noted that continental plates tear apart, drift apart, and collide with individually other. Seafloor Spreading Geophysicists, occasion the ocean floor wit h an instrument that measures magnetized fi! elds, showed that the rocks on... If you want to get a full essay, order it on our website: BestEssayCheap.com

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