In Module One Minerals

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St. Petersburg College *

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1000

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Geology

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Dec 6, 2023

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docx

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Uploaded by DrGoldfinch1312

 What is the formal definition of a mineral? Be sure to highlight at least two segments of the definition and translate the definition segments into more common language to facilitate proper understanding. The formal definition of a mineral is a naturally occurring element or compound that is inorganic, has an orderly internal structure and characteristic chemical composition, crystal form, and physical properties. For example, a naturally occurring element would have to exist in nature without any addition from humans, such as oxygen. To be inorganic, that also means it is not made by humans, is not alive, and does not occur in liquid or gaseous forms.  Identify at least two physical properties (streak, fracture, etc.) of a mineral while using examples of common minerals that prominently feature those properties. Provide links or screenshots of the discussed minerals to illustrate the highlighted properties. Also, explain what mineral group it belongs to and why. There are a variety of quartz minerals but this one I am using has physical properties that include being colorless and has a crystal form. Another mineral that is colorless and commonly used is diamond. Copper is another mineral but has different physical properties that include having a color that can be metallic, red, brown, and orange. It is also soft and can be malleable. Other minerals that are soft include talc and gypsum. Quartz belongs to the mineral group called silicates because it contains the elements silicon and oxygen. Copper is a non-silicate mineral because it does not contain silicon or oxygen in it’s chemical makeup.

Quartz Copper  Describe at least one type of rock (igneous, sedimentary, etc.), how that type forms, and at least one subtype (extrusive, sandstone, etc.) of that rock and how it develops. Find an example online and provide links or screenshots of the rock subtype. Your example should illustrate the most identifiable characteristics of that particular rock type. My favorite rock type is sedimentary, and it is formed from many smaller rocks during the processes of erosion, weathering, dissolution, precipitation, and lithification. Erosion and weathering from rain and wind break down some larger rocks into much smaller ones, dissolution is chemical weathering where slightly acidic water that wears away the rock. Precipitation forms rocks from chemicals that are precipitating in the acidic water and lithification is where sediments on the bottom of a body of water are slowly compacted into rocks with the weight of the of other sediments. A subtype of sedimentary rocks is sandstone, which is formed by grains of sand that are compacted and cemented to each other over a period of up to millions of years. Sandstone is very porous, can have extremely visible layering, and can vary in colors that include brown, purple, pink and red.

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