Key

Key 1)         Continental Drift Theory. 1915-Pangea Alfred Wagner vie a major item in this surmise. The theory convolute S kayoedh America and Africa, and Wegners venture was that 200 million suppurate ago, the continents were all one large enormous continent called Pangea, which aft(prenominal) a while began to run over into smaller continents. deuce pieces of evidence that support this school of thought: the dispersion of fossils among each continent, and the elbow room South America and Africa passel together. Alfred never really explained his theory very well, so therefore, it was non accepted. 2)          opposite wandering Polar wandering was a steering of lava flow conducted in europium in the 1950s. The discovery was that attractive alignment in the entreat rich minerals in lava flows of several(predicate) salary increase ons was found to vary widely. 3)         Continental Shelf Fit noticed. mid-sixties The Continental ledge is a gently submerged knock over extending from the shoreline towards the deep- ocean basin. The continental shelf is located 500 meters down, and the fit is not believed to be perfect, because subsequently a long oath erosion processes modify shorelines.

4) charismatic St rights found on the seafloor. Otherwise known as magnetic reversals. 1963 The relationship in the midst of 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 argon corresponding to each other. If you loss to get a ripe essay, order it on our website: Orderessay

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