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Observed Distribution Of South American Relief Features
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The land below us is always in motion. Plate tectonics studies these restless effects to give us a better understanding of the Earth and its past. New molten rocks are poured out in the form of magma from the mid-ocean ridges. The rock is recycled and re-entered back into the earth in deep ocean t ....
Middle of essay ....allow in these areas. Sea floor spreading and continental drift are the products of this continual upwelling as you can see in the relief maps of South America.
The cooled magma will, in time, sink back down into the Earth in the deep ocean trenches. The mantle sinking down produces subduction zones or Benioff zones. The deepest part of the ocean resides in these areas. There are three types of boundaries where plates meet. They are Divergent boundaries—the upwelling of magma; convergent bound.... |
Number of words: 855 |
Approximate pages: 4 |
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