Mr May Erik Essay

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Assignment 1: Minerals and Rocks

Critical Thinking. Use complete sentences, correct spelling, and the information presented in Chapters 2 and 3 to answer the questions below.

1) Overall, the physical properties of minerals provide a reliable means to identify common minerals. However, certain properties can exhibit a range of characteristics or values making them less useful for identification purposes. Choose three physical properties that might vary considerably between samples of the same mineral and explain why such variability might exist.

Hardness- Kyanite can contain differential hardness in each mineral.

Color- Spahlerite can be many colors including, black, brown, red, green, white, or yellow.

Habit- Pyrite can
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4) Considering the various processes involved in mechanical and chemical weathering, what are some of the factors that influence or control the weathering of earth materials? Also, which of these factors would be most important?
Mechanical- Is the weathering processes in which breaks down the rock into smaller pieces. Frost wedging and sheeting are two examples of mechanical weathering. One of the biggest factors in mechanical weathering is the earth’s climate and how it can affect the weathering process. Mechanical weathering produces large quantities of sediment, a loose assemblage of rock particles and mineral grains that result from the physical disintegration of rock.

Chemical- In chemical weathering, rocks are altered by chemical interactions resulting in their decomposition. The most important factor when it comes to chemical weathering is water. Oxidation is a common form of chemical weathering; This process is most common in rocks with a high concentration of iron containing minerals. Another type of chemical weathering is leaching; this is when water dissolves mineral substances and removes them from the rock.

5) How might a geologist infer ancient climatic conditions using sedimentary rocks? (Hint: Think in terms of the conditions necessary to form certain rocks and also the features, structures, and fossils found in sedimentary rocks.)

Sedimentary deposits created by the wind are called eolian deposits. Ancient aeolian deposits
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