Plate Tectonics

The Theory of Plate Tectonics The Earths rancour is cracked into twenty or so individual pieces called plates. Continents consist on top of the plates. These plates bumble up on the liquified inclination or magma from the spread and motion slowly. The idea of piteous plates is called the Theory of Plate Tectonics, which was original real by kindle Hess in 1962. The possibleness explains the how and wherefore screw earthquakes, mountains and volcanoes as well(p) as how centuries ago akin animals could comport lived at the similar time on what is outright divide clears. There is a lot evidence supporting this theory. The earlier earth offices fancyed that continents joined in concert give care a jigsaw puzzle. As centuries former(prenominal) the maps collectioned that the continents had drifted apart to where they are today. This is called the theory of Continental drift, discover by Alfred Wegener. [See diagram 1] It is proven that continents arrive at drifted away from distributively other. If you manifestation at a map you can discriminate that the occidental portion of the African continent and the Eastern sailplaning of the atomic number 16 American continent fit in concert like a jigsaw. round 300 million days ago a continental ice sheet covered separate of South America, southern Africa, India, and southern Australia.

Glacial lines on rocks show that glaciers moved from Africa toward the Atlantic oceanic and from the Atlantic nautical onto South America. Such glaciation is more or less likely if the Atlantic Ocean was abstracted and the continents joined. Certain rocks of the ocean groundwork are magnetised in the wariness of the Earths magnetised country. The rocks lease magnetic stripes. Examination of these rocks has revealed that the earths magnetic field has reversed its path many times. The stripes show this reversal, indicating that the youngest rock is next to the ridges go the... If you want to get a lavish essay, order it on our website: Orderessay

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