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Write an account of the relationship between tectonic processes and global structures

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Introduction

Write an account of the relationship between tectonic processes and global structures In your account * Describe the characteristics of tectonic plates; * Outline the evidence (biological and geological) that supports the theory of plate tectonics * Discuss the relationship between tectonic processes and the global structures that result The relationship between tectonic processes and global structures is an interesting and complex topic; the different types of tectonic processes make an effect on the type of global structures that appear on our earth. In this essay, I am first going to look into the theory behind plate tectonics and what evidence is there to support this theory. I will then look at the characteristics of the two tectonic plates oceanic and continental plates. Lastly, I will draw all of this information together and discuss the main processes that occur on our earth, and the main structures that form. Wagener was the first scientist in 1915 to provide some evidence to support his theory on plate tectonics. He suggested that the plates moved by the process known as Continental Drift. Since Wagener died in 1930, and since his death, further both geological and biological evidence has been obtained to support the theory of plate tectonics. ...read more.

Middle

There are three main types of plate margins, Constructive Plate Margins, Destructive Plate Margins and Conservative Plate Margins. Each different margin has a different process that it is associated with and also results in different global structures forming. The most common type of Destructive Plate Margin is Oceanic-Continental plate boundaries. At Destructive margins, the plates converge, resulting in one being forced downwards beneath the overriding plate. As the oceanic crust moves down below the continental, rising temperatures and frictional effects cause the oceanic rocks to melt. As the two plates slide past and over one another, substantial friction stores energy within the rocks. This energy is released in earthquakes with foci along the destructive plate margin or the subduction zone. As the oceanic crust is pushed downwards and forms deep ocean trenches along the plate margin. Deep Oceanic Trenches the deepest parts of the ocean and are a major global structure that are formed as a result of Destructive Plate Margins. The deepest Oceanic trench in the whole of the world is the Marinas Trench in the Pacific Ocean. The Marinas Trench is 11,040 deep and occurs where the fast moving pacific-plate converges with the slower moving Philippine plate, Marinas Trench plunges deeper into the Earth's interior (nearly 11,000 m) than Mount Everest, the world's tallest mountain, rises above sea level (about 8,854 m). ...read more.

Conclusion

The evidence that supported this was both geographical and biological and included the fitting together of different continents across the world, as well as specific species fossils that were found on opposite sides of the world on separate continents. Due to this new evidence, the original idea of "land bridges" was destroyed and the new scientific knowledge allowed scientists to find out more about different plates and margins themselves. The two main plates that were discovered were Continental and Oceanic plates, and both have completely different characteristics and resulted in different landforms being formed. Destructive plate margins are the site of subduction zones and result of the destruction of the oceanic plate, and can result in the formation of fold mountains and deep sea trenches. Constructive plate margins can occur at continental-continental plate margins, where the two plates are moving apart, and this results in the formation of new oceanic crust in the form of a oceanic ridge. Conservative is the last type of plate margins and doesn't involve either the formation of new crust or the destruction of plates. The improved scientific technology that allowed scientists to find out more information about the different plates and the processes and landforms that form as a result, and allowed us, today to understand more about the formation of the landforms on our earth. ...read more.

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