Continental drift

Continental Drift         Continental aver is the surmisal that the positions of the earths continents have changed a lot through geological time. The German meteorologist Alfred Wegener proposed the first blanket(prenominal) system of Continental hurl in 1912, on the arouse end of the counselling the continents lead to masterher on the opposing Atlantic coasts and paleontology correlation on both sides of the Atlantic. He proposed the orifice that about 200 one million million years ago in that respect was one salient big continent, or supercontinent, called Pangaea. Pangaea tear into deuce big landmasses, Laurasia and Gondwanaland. The bounty continents separated in the beside geologic era, the Mesozoic. In this process, the Earths rotation caused horizontal alterations in the granite continents aimless on the sea of the basaltic marine appals. The frictional chase along the leading edges of the vagabond continents created mountains. Wegeners system met controversy until 1954, when British geophysicists quest to explain the phenomenon of gelid wandering revived it. Since then, the young theory of Plate plate plate tectonic theory has evolved from and replaced Wegeners original thesis. Plate tectonics is the theory that deals with the structure, history, and dynamics of the earths in bileation. 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 1960s and 1970s, with ideas taken from Wegeners earlier thoughts. Earlier, Wegener and other scientists had observe that continental crust grows by additions and that a ridgepole in the middle of the ocean runs almost all the way around the world. It was also noted that continental plates tear apart, slip apart, and collide with each other. Seafloor airing Geophysicists, occasion the ocean floor with an instrument that measures magnetic fields, showed that the rocks on... If you wish to get a good essay, order it on our website: Orderessay

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