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Questions and Answers
What are chemical sedimentary rocks formed by?
What are chemical sedimentary rocks formed by?
- Igneous processes
- Compression of sediments
- Minerals coming out of solution (correct)
- Metamorphism of existing rocks
What is a common example of a chemical sedimentary rock?
What is a common example of a chemical sedimentary rock?
Limestone
What is the chief mineral component of limestone?
What is the chief mineral component of limestone?
Calcite
What is the chief mineral component of rock salt?
What is the chief mineral component of rock salt?
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What mineral composes rock gypsum?
What mineral composes rock gypsum?
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Cave deposits are made of ______ due to evaporating water.
Cave deposits are made of ______ due to evaporating water.
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Study Notes
Chemical Sedimentary Rocks
- Formed through the precipitation of minerals from a solution.
- Precipitation involves dissolved minerals solidifying, often due to evaporation.
- Occur as a result of both evaporation processes and chemical activities.
Examples of Chemical Sedimentary Rocks
- Limestone: primarily composed of calcite; reacts with hydrochloric acid (HCl).
- Rock Salt: formed from halite; typically found in thick layers.
- Rock Gypsum: made up of gypsum; appears in layers or veins.
Limestone
- Major mineral component is calcite.
- Commonly found at the bottom of seas or lakes.
- Characterized by its reaction to HCl, producing fizzing or bubbling.
Rock Salt
- Chief mineral is halite.
- Typically formed in environments where evaporation occurs, leading to thick deposits.
Rock Gypsum
- Composed primarily of gypsum.
- Often occurs in layered formations or as veins.
Cave Deposits
- Mainly consist of limestone.
- Formed from the deposition of molecules carried by evaporating water, creating stalactites and stalagmites.
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