Land Feature Paper - 1 Land Feature Paper Mo Shamseldin...

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1 Land Feature Paper Mo Shamseldin GLG/150 BSGI1JU8X1 March 14, 2016 Anna Foutz
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2 Land Feature Paper: The Cascades The paradigm of plate tectonics is the physical, continual movement of the continental drift and the spreading of the oceanic floors. The lithospheric plates travel under the Earth’s crust and are slowly moved by the spreading of the sea floor caused by convection currents, creating oceanic ridges ("Britannica.com", 2016). As the crust moves, the plates will either sink in to the mantle and dissolve, or they will reposition further along the plate boundary, either moving together or moving apart. It is this theory that illustrates how Earth’s surface features are what they are; why mountain ranges, volcanos, earthquakes, and mineral deposits occur where they do. Additionally, the theory demonstrates that volcanoes and earthquakes arise from a common source: subduction ("OSU.com", 2016). The Cascade Volcanic Arch, for example, is an impressive example of this evolvement. By drawing attention to the specific and concentrated area of subduction, observation of the Pacific Northwest demonstrates a cosmic opus of volcanic and seismic activity. This vast area encompasses a horseshoe shaped region surrounding the land masses on the Pacific Ocean. This sector is known as the Pacific Ring of Fire; and  it is correlated with a nearly incessant succession of oceanic trenches, volcanic arcs and belts, and/or tectonic plate movements, e
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  • Fall '14
  • Plate Tectonics, Cascade Volcanoes, New World Encyclopedia, Cascade Range, cascade mountain range, Cascade Volcanic Arch

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