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Questions and Answers
What are some varieties of limestone?
What are some varieties of limestone?
- Granite, marble, sandstone, shale
- Quartz, feldspar, mica, amphibole
- Basalt, obsidian, pumice, slate
- Travertine, tufa, caliche, chalk (correct)
How is limestone formed through the process of evaporation?
How is limestone formed through the process of evaporation?
- High pressure causes calcium carbonate to form limestone
- Water droplets on cave walls evaporate, leaving behind calcium carbonate (correct)
- Heat from volcanic activity leads to the formation of limestone
- Chemical reactions with seawater create limestone deposits
What is the primary composition of limestone?
What is the primary composition of limestone?
- 50% calcium carbonate (CaCO3) (correct)
- 50% silica and alumina
- 50% sand and clay
- 50% magnesium oxide
How is mechanical transport and deposition involved in the formation of limestone?
How is mechanical transport and deposition involved in the formation of limestone?
What causes limestone to change color from white or gray?
What causes limestone to change color from white or gray?
Flashcards
Varieties of limestone
Varieties of limestone
Travertine, tufa, caliche and chalk
Limestone formation by evaporation
Limestone formation by evaporation
Water droplets on cave walls evaporate, leaving calcium carbonate deposits behind.
Primary composition of limestone
Primary composition of limestone
Limestone is composed of at least 50% calcium carbonate (CaCO3).
Limestone formation by mechanical transport
Limestone formation by mechanical transport
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Cause of limestone color variations
Cause of limestone color variations
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Study Notes
Varieties of Limestone
- There are several varieties of limestone, including fossiliferous, lithographic, and oolitic limestone.
Formation of Limestone
- Limestone is formed through the process of evaporation, where calcium carbonate (CaCO3) precipitates out of solution and accumulates on the sea floor or lake bed.
Composition of Limestone
- Limestone is primarily composed of calcium carbonate (CaCO3), which is derived from the skeletal fragments of marine organisms, such as coral, foraminifera, and mollusks.
Mechanical Transport and Deposition
- Mechanical transport and deposition play a crucial role in the formation of limestone, where waves, currents, and tidal action transport calcium carbonate particles and deposit them in a new location.
Color Variation in Limestone
- Limestone can change color from white or gray due to the presence of impurities, such as iron oxide, which can cause a reddish or yellowish tint, or manganese, which can cause a pinkish or brownish tint.
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