Continental Drift

Theory of simpleal botch The hypothesis that the continents had once formed a single land mass before breaking a font and floating to there present locations was first presented by Alfred Wenger. He believed that the continents were once joined in a overseer continent that scientists now call Pangaea. Over a grand block of time the continents drifted apart due to the earths rotation. In 1915 he published a book some his system. His master(prenominal) evidence was the continents appear to have a jigsaw deal fit, the west coast of Africa and South America have the like pattern of rock layers and have the same plant and tool fossils; some of these animals are only found in those sack of the world and their fossils show they could not swim. Although it had been noted that the shapes of the continents seemed to fit together Wenger died in 1930 and his ideas had still not been veritable. This was because there was no tommyrot for how the continents go and because h e was not a geologist. In the mid-fifties and years later geologists began to con attituder the theory of continental drift due to fossil records from separate continents showing the same species and mineral specimens along the same break lines of the continents.

His ideas were not fully recognised until the 1960s when the Atlantic Ocean fib was surveyed in busy and the mid Atlantic ridge was discovered. This is a range of mountains and volcanoes in the middle of the ocean. Rock that was discovered on the ocean news report was found to be younger than the rock in the continents. The magnetised alignment of rocks containing iron rich minerals was symmetrical either side of the ridg e. This new evidence fitted in with the theo! ry of continental drift. Scientists as well discovered that this movement could be caused by in truth mighty convection currents in the mantle. This brought about a new theory of abode tectonics. Scientists suggested that the ocean floor began to spread and that the continents existed on plates that moved in...If you ask to get a full essay, order it on our website: OrderEssay.net

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