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Mineral and Rocks - Essay Example

However, there is one common property that is the same for all minerals and that is that all minerals exist in solid form and never in liquid form in their natural surroundings. According to Michael Allaby’s (2009) book “Earth Science: A Scientific History of the Solid Earth”, the author explains that minerals came into being when the Earth evolved and human activity has nothing to do with the formation of minerals. Minerals and also classified and categorized as chemical compounds due to their chemical composition and their crystalline form. In his book titled “Earth Science: A Scientific History of the Solid Earth”, Michael Allaby (2009) explains that most of the minerals are inorganic in their natural form. A good example is sodium chloride, also known as common salt which possesses all the characteristics of a mineral. Common salt or sodium chloride has a solid form, is inorganic and is comprised of chemical compounds. In addition to this, common salt is crystalline in structure and occurs as the result of natural phenomena. Silicate minerals are obtained from the chemical reaction of silicon with oxygen. Gradually, the silicates associate and react with other elements which give it specific properties. For example minerals such as Potassium (K) Sodium (Na) Magnesium (Mg) Calcium (Ca) and Iron (Fe) are formed in this way. Some of the selected groups are classified as Quartz, Olivine group, Micas, Pyroxene group and the Amphibole group. The crust of the Earth is Feldspar which also belongs

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to the group of silicate minerals. Mineral rocks have their own distinctive classification and are categorized into three groups – namely, 1) Metamorphic rocks, 2) Sedimentary rocks and 3) Igneous rocks. These rocks are formed by natural processes that take place on the Earth. Deep down in the Earth, we can find Magma which is a mixture of molten metal, gasses and rock which occurs in liquid form due to the very high temperature and pressure inside the Earth. Igneous rocks are formed from this Magma which is gradually thrust upward to the Earth’s surface and cools. On cooling, the liquid Magma gets settled in a layered pattern depending on the temperature and pressure involved and this is what is known as crystallization. Sedimentary rocks are formed from sediments in the Earth that gets collected in layers and hardens to form rocks through the process of weathering. Weathering is defined as a natural process of the breaking down of rocks into their constituent minerals which again combine together to give rise to new rocks. The weathering process is triggered by the action of natural forces such as the movement of the Earth, wind and water. According to Clive Gifford (2005) in “Weathering and Erosion”, Chemical Weathering takes place due to the action of acid rains and other organic liquids that impact upon the rocks and bring about deterioration. According to Harvey Blatt, Robert Tracy, Edward Owens (2006) in “Petrology: Igneous, Metamorphic and Sedimentary”, both Igneous and sedimentary rocks get exposed to different weather conditions such as high and low temperatures and pressures and this result in the formation of metamorphic rocks. Each of these rocks has their own unique characteristics which enables us to identify them. For example,


Earth Science, involves the study of Mineralogy, Geology, Meteorology, astronomy and Geophysics that enables us to have a better understanding of the Earth and its atmosphere…
Mineral and Rocks
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