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Volcanic & Seismic events are pieces of evidence proving that the plate tectonics theory is valid

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  • Essay length: 782 words
  • Submitted: 26/04/2012
  • Marked by teacher: (?) Molly Reynolds
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AS and A Level Hazardous Environments

Teacher essay summary

4 star(s)

A very good review of the evidence surrounding plate tectonic theory. A strong answer is given referring to examples with good use of geographical terminology throughout. One improvement would be to incorporate more evidence into the conclusion.

Marked by teacher Molly Reynolds 08/12/1999

The first 200 words of this essay...

Volcanic & Seismic events are pieces of evidence proving that the plate tectonics theory is valid

The plate tectonics theory was put forward by Alfred Wegener suggesting that the continents were at one point all conjoined in one supercontinent known as Pangaea. He then suggested that Pangaea had drifted apart through the movement of plates to give us the current position of continents we have today. Wegener's theory was linked to a variety of evidence, however it took further research and evidence for this to become a leading theory. This means that although volcanic and seismic events help to prove the plate tectonics theory valid, there is also a range of other factors involved.

Vulcanicity is the surface presence of Magma within the Earth's crust. Whereas seismicity is where the build up of pressure in the crust is released. Both volcanic and seismic activty when plotted on a map can be seen to follow certain patterns and it is this distribution that helps explain the plate theory. The distributions of earthquake events are found in broad, uneven belts around plate margins and it is the movement of the plates that cause the seismic events. Most of

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MbT essay summary

A very good review of the evidence surrounding plate tectonic theory. A strong answer is given referring to examples with good use of geographical terminology throughout. One improvement would be to incorporate more evidence into the conclusion.

Marked by teacher Molly Reynolds 08/12/1999

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