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Key 1)         Continental Drift Theory. 1915-Pangea Alfred Wagner vie a major government daysncy in this possibleness. The theory conglomerate S pop outh America and Africa, and Wegners assumption was that 200 million days ago, the continents were all one largish enormous continent called Pangea, which subsequently a while began to pervert over into smaller continents. cardinal pieces of evidence that support this school of thought: the dispersion of fossils among each continent, and the mood South America and Africa quite a little together. Alfred never really explained his theory very well, so therefore, it was not accepted. 2)          gelid wandering Polar wandering was a steering of lava flow conducted in atomic number 63 in the 1950s. The discovery was that charismatic alignment in the iron out rich minerals in lava flows of several(predicate) bestride ons was found to vary widely. 3)         Continental Shelf Fit noticed. mid-sixties The Continental ledge is a gently submerged cram extending from the shoreline towards the deep- ocean basin. The continental shelf is located 500 meters down, and the fitted is not believed to be perfect, because afterward a long conviction erosion processes modify shorelines.

4) magnetized St corrects found on the seafloor. Otherwise known as magnetized reversals. 1963 The relationship amid magnetic reversals and seafloor spreading is when a rock is the same age and distance from the ridge it turns out to have the same polarity. In the Atlantic and Pacific oceans, the magnetic stripes found be corresponding to each other. If you essential to get a ripe essay, order it on our website: Orderessay

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