plate tectonics Essay

2412 Words Oct 18th, 2013 10 Pages
Plate Tectonics

Ever since the beginning on time, Humans believed the ground is solid and immobile. But this is not true whatsoever. The Earth is every-changing and continually in motion. The stability of the Earth is not at all what we think it is. Thinking about the rotational axis of the Earth, and possibly of what the Earth may become at a certain point in time, has a great influence on understanding all aspects of living things, either in the past, present, or future. The study of Plate tectonics is accredited to most of the creations of Mountain Ranges, the drifting of continents, earthquakes, and volcanic activity. Plate tectonics and mountains also play a big part in the geological features of our planet or any planet for that
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It turned out that all of these edges became known as tectonic plates (Kearey 2009).
Further studies showed a pattern of magnetic fields in the ocean basins. The rock basalt contains a lot of magnetic minerals called magnetite. The lava forms and cools and the magnetic minerals align with the North Pole. This proves that the Earth has gone through several magnetic reversals; this would not be possible if the lithosphere was not in motion. Since all of this has been discovered, plate tectonics has gained acceptance as the Earth processes (Kearey 2009).
Plate tectonics is made up of the study the motion and change in the Earth’s crust. This is based on the theory that the lithosphere is divided into seven major plates and several minor plates, and they all move in accordance with each other. They also move in relation to hot spots, which is where mantle material comes up. The plate tectonic theory tries to tell us that the Earth’s crust moves over a period of time. The crust moves in a rigid way, which explains the change that we see. The theory is based on a few beliefs. New material is made by the spreading of the ocean floor and eventually become part of a plate, and motion of plates occurs only at plate boundaries. Plates are rocks that pretty much float on top of the asthenosphere. The crust has two types, the oceanic and continental; they both differ because of composition.
The continental crust is made up of

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