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Geotechnical Materials - Essay Example

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The Earth we live on is composed of a huge mass of rock; from the tallest mountain ranges to the beds of the seven oceans rocks have set the base on this earth. Various types of rocks and minerals have been found on Earth. Most of the rocks on the Earth's are produced from merely eight elements the oxygen, silicon, aluminum, iron, magnesium, calcium, potassium, and sodium, but these elements are pooled in a number of ways to make rocks that are extremely distinct.
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Geotechnical Materials
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Download file to see previous pages While the universe itself is aged at least 4.5 billion years, but rocks from the start of Earth's history have altered so much from their actual shape that they have become new classes of rock. By evaluating how rocks form and modify, scientists have developed a strong perception of the Earth we commute on and its roots.
Igneous rocks are formed from liquefied rock that has subjected to lower temperature and hardened. Deep within the earth the affect of high temperatures and pressure melts the rocks that exist deep within the surface. The molten rock also called the magma can the flow upward in the form of a volcano and be erupted on to the earth's facade. When this molten rock cools, the process is slow and usually occurs at areas thousands of feet deep, crystals are formed from the melted liquid, and a coarse-grained rock result. When the magma cools quickly, typically near or at the Earth's surface, the crystals are really minute, and a fine-grained rock forms. An extensive variety of rocks are created by diverse cooling rates and distinct chemical compositions of the original molten rock. Obsidian i.e. volcanic glass, granite and andesite porphyry are three of the many kinds of igneous rocks.
These rocks are formed a...
They are lined clusters of sediments-fragments of rocks, minerals, or animal or plant matter. Temperatures and pressures conditions are moderate or even low at the Earth's surface, and sedimentary rocks reflect this reality by their form and the minerals they constitute. Most sedimentary rocks become paved together by minerals and chemicals or are held jointly by electrical attraction; but, some still remain loose and insecure. The films are typically parallel or almost parallel to the surface of the earth. If they are at large angles to the earth's surface or are tangled or conked out, a certain kind of Earth movement has taken place since the rock was fashioned. Sedimentary rocks are being produced around us all the time. Compressed and dehydrated mud flats solidify into shale.
Metamorphous Rocks
Sedimentary and igneous rocks are occasionally exposed to extreme pressures conditions or are heated so intesely that they are completely changed into an entirely new class of rock family. They are changed to metamorphic rocks, which are formed deep within the Earth's crust. Rocks do not melt duing the process of metaorphism, but instead are transformed into denser, more consolidated rocks.Distinct kinds of minerals are produced either by restructuring of mineral components or by mixing and reacting with fluids that enter the rocks. Some kinds of metamorphic rocks are strongly joined or foliated i.e. their minerals are arranged in such a parralel way that their rocks have a striped appearance. Effects of Pressure and temperature can even modify the propoerties of previously metamorphised rocks and convert them into new types

Classification and Structure Rocks
Rocks are classified in various manners by ...Download file to see next pagesRead More
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